New Garrett GTX2867r - Page 16 - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

PoorMans180SX · 01-07-2013, 02:14 PM

I sure hope that's not the dyno, the powerband looks terrible.

codyace · 01-07-2013, 06:04 PM

That's a wacky graph, and judging by the lack of top end retention we can all easily see how it was overspun *the turbo* to make the inflated number (which you can see many a times, especially on v8 turbo cars where they spin the balls off the turbo only to fall falt on the top end).

I really need to get back to the same dyno in the spring as I went to for my 2871r setup, I know this turbo is certainly making more power. Love it.

huffandpuff00 · 01-18-2013, 01:22 PM

Both sizes will work fine, but the 38mm is cheaper and more compact, so why pay more for 44mm... unless you think you might still get creep.

another member on here said they still were getting creep w/ a 44mm on a oem sr manifold. anyone else have creep issue?

cotbu · 01-18-2013, 04:48 PM

No creep here from v44 stock manifold

Rafa-Z · 01-20-2013, 03:24 AM

thats exactly what I was thinking why pay $100 or more and im sure even if it gave me some boost creep it would be way less than an internal one, I'm guessing. Anyhow im guessing that by the time I need to upgrade it will be for a twin scroll setup and it can always be sold.

Seraphim38 · 01-20-2013, 08:07 AM

I would be surprised if a 38mm would creep on a gtx2867r. Heck, I ran a GT2871r at anything from 7psi to 20psi on the internal gate and it never creeped on me.

codyace · 01-20-2013, 01:18 PM

Quote:

Originally Posted by Seraphim38

I would be surprised if a 38mm would creep on a gtx2867r. Heck, I ran a GT2871r at anything from 7psi to 20psi on the internal gate and it never creeped on me.

On my stock manifold setups, both the two bolt Tial 38, and V Band 38MVS do not creep with with the GTX 2867. 12 psi base springs in both, 12 psi to redline on the gate, 15 with the EBC and 20 with the EBC no issues.

Def · 01-20-2013, 03:50 PM

I'd go with a MVS 38 for a turbo like this. Should be plenty fine.

As for porting the stock manifold - it needs it BADLY. I spent about 8-9 hours on my manifold and took off a little over half a pound of material. The tooling clearance bumps are ridiculous, so that's the first place to start. Then work on smoothing things out and gasket matching them. I also put anti-reversion port shapes on the mani (larger than head ports). Basically opened the ports out to the gasket on the mani with a good 20-30 deg taper into the port. That also helps with any mani to head alignment mismatch.

huffandpuff00 · 02-05-2013, 03:52 AM

anyone check this out...http://zilvia.net/f/forced-induction...ml#post5124337

di-devol · 02-05-2013, 08:58 AM

^Wut? Didn't know that was possible.

***S14DB*** · 02-05-2013, 04:58 PM

Quote:

Originally Posted by di-devol

^Wut? Didn't know that was possible.

I have seen the option popping up with some re-builders now. Not a bad price for a wheel and balance.
I was quoted $750 for a New CHRA and GTX wheel installed.

codyace · 02-05-2013, 05:03 PM

Quote:

Originally Posted by S14DB

I have seen the option popping up with some re-builders now. Not a bad price for a wheel and balance.
I was quoted $750 for a New CHRA and GTX wheel installed.

450 dollars for all that seems a bit on cheap end IMO, especially for a billet wheel. Still a nice price, but it almost seems too good to be true IMO especially when replacement wheels (non billet), the machine time, and the balance (for any turbo) would cost that much.

ForeignMuscle · 02-05-2013, 05:12 PM

Anyone running big boost with e85 on one of these??

I have a $12k sr20 that I'm about to sell in lieu of a stock sr20 with a head gasket, head studs, CodyAce mani, JWT s4 or c1 cams, and the GTX2867.

I would like to try for 475whp with very close to even torque at 25+ psi on e85.

Just wondering if anyone else has used this turbo with fuel.

Croustibat · 02-14-2013, 02:54 AM

Quote:

Originally Posted by ForeignMuscle

Anyone running big boost with e85 on one of these??

I have a $12k sr20 that I'm about to sell in lieu of a stock sr20 with a head gasket, head studs, CodyAce mani, JWT s4 or c1 cams, and the GTX2867.

I would like to try for 475whp with very close to even torque at 25+ psi on e85.

Just wondering if anyone else has used this turbo with fuel.

On a well tuned ca18det w/e85 i know, at 24psi, it makes around 430HP (not WHP). The boost starts to go down at 8000rpm (he is running 260/ 10.25mm cams and solid lifters, ported head and so on). I dont think it can make 70HP more.

That is the reason he is going for a big twinscroll turbo

ForeignMuscle · 02-14-2013, 06:55 AM

Quote:

Originally Posted by Croustibat

On a well tuned ca18det w/e85 i know, at 24psi, it makes around 430HP (not WHP). The boost starts to go down at 8000rpm (he is running 260/ 10.25mm cams and solid lifters, ported head and so on). I dont think it can make 70HP more.

That is the reason he is going for a big twinscroll turbo

That's good power for the CA, but I wouldn't say the turbo is maxed out.

An sr engine has more displacement. I could use 12.5mm cams and I feel like I could push more than 24psi out of the gtx, but I could be wrong. Surely the thing is good for 450whp at least. If Codyace made 400whp with a 2871 and pump gas then I should be able to see close to 475whp with e85, 5 more psi, and the advanced timing that ethanol allows. No proof without puddin though.

I may just keep my big top mount setup and make 500whp with ease.

Croustibat · 02-14-2013, 07:17 AM

Quote:

Originally Posted by ForeignMuscle

That's good power for the CA, but I wouldn't say the turbo is maxed out.

An sr engine has more displacement. I could use 12.5mm cams and I feel like I could push more than 24psi out of the gtx, but I could be wrong. Surely the thing is good for 450whp at least. If Codyace made 400whp with a 2871 and pump gas then I should be able to see close to 475whp with e85, 5 more psi, and the advanced timing that ethanol allows. No proof without puddin though.

I may just keep my big top mount setup and make 500whp with ease.

The turbo is advertised as a "max 475HP" .

Check its flowmap:

I think it will overspin and still be out of puff at 30psi on an SR20. It will have awesome spool time though, seeing how reactive it is on that CA... basically, it has gt2871r/gt3071r power potential, with faster spool.

the problem is not knock, which e85 allows to get rid of, but the turbo ability to produce flow at 30psi. If it is out of puff at 25psi on a 1.8L @ 8000rpm, i really dont believe it will produce enough flow to get 30psi on a 2L (even at 7000rpm). I would not use that turbo if your power goal is 500HP (unless you dont care how long it lasts and you just need fast spool).

801nismo104 · 02-07-2013, 09:36 PM

Ill be running 20+psi on ny gtx2867r with sunoco 104 not E85 though. What size exhaust housing are you going to use? I have the 0.64 but I might switch over to the 0.86 to get the max potential out of it.

Rafa-Z · 02-14-2013, 01:17 AM

Hey guys so I was going to run the cody ace manifold but got a great deal on a DOC race manifold with optional v band setup but Im still interested to know what mods do you guys do to the stock manifold? Do you port it or run it like that? How much is it usually to extrude and hone? Do you guys think the DOC racing one flows a lot more?
Also I got a great deal on a GT2871r .86 since I didnt have enough money to purchase the GTX2867r but to my surprise, the same day I got it Pure Turbos posted that they upgrade it to the billet gtx wheel for an extra 300 which saves me almost half of what I would pay for the other turbo. I plan on posting dynographs and everything once its all done. Let me know what you guys think.

huffandpuff00 · 02-14-2013, 04:11 AM

Quote:

Originally Posted by Rafa-Z

Do you port it or run it like that? How much is it usually to extrude and hone? Do you guys think the DOC racing one flows a lot more?

I ported my stock manifold to the best of my abilities, because extrude/honed is $495. Getting it E/H im assuming makes a big difference on flow of the eom manifold, but ultimately i ended up switching to a doc mani for the true collector and quality.

Rafa-Z · 02-14-2013, 10:43 AM

Quote:

Originally Posted by huffandpuff00

I ported my stock manifold to the best of my abilities, because extrude/honed is $495. Getting it E/H im assuming makes a big difference on flow of the eom manifold, but ultimately i ended up switching to a doc mani for the true collector and quality.

yeah that's what I was afraid of. I mean I really like the stock manifold set up that cody ace makes and was my original option for many reasons but I got a brand new DOC race manifold for 300 bucks and it came with the v band option. I was still hesitant since the cody ace one would be less than half of that without e/h.

ForeignMuscle · 02-14-2013, 07:26 AM

I might not have put the "5psi more" in best terms. I meant 25psi on an sr20.

It's not really a set number I wanted rather an itch to start over and build another engine to the max. I get bored easily I guess.

I may just keep my current setup and build a t2 powered engine on the side.

I believe my top mount, billet Precision 5858 actually spools faster than my 2871 did. I would love to have the torque of a t2 based turbo though.

Croustibat · 02-14-2013, 07:34 AM

TBH that CA, while very efficient, is boring with that turbo. When it had a gt3071r it has some kick to it. Now it has a big fat powerband... but it is boring. It accelerates very fast fast, but there is no "turbo feel", no kick in the butt. I dont know how to describe it ... His owner agrees too. The replacement is a gtx3582r (yes, no typo here. yes, LAG, he knows

) , power goal is in the 600HP range (new gearbox is on its way too). His car is somewhat a demo car for the shop though.

It really depends on what you do with the car, or what you want from it. If you want low down torque, you cant go wrong with a 2867... i dont know how it compares with your current setup though.

codyace · 02-14-2013, 12:09 PM

Quote:

Originally Posted by ForeignMuscle

I have a $12k sr20 that I'm about to sell in lieu of a stock sr20 with a head gasket, head studs, CodyAce mani, JWT s4 or c1 cams, and the GTX2867.

C1 cams are great, I just think they'd be better suited to a 30r turbo with less exhaust back pressure. Ttruthfull, that's the main detriment IMO with all of these T2 setups as it's such a fine line pushing these things with such high backpressure ratios. In this same regard that's why we see these setups often knock pistons out and or ruin headgaskets at the hands of inexperienced or aggressive tuners, as it's easy to keep dumping timing in them as they naturally are just going to keep spooling quicker. Torque onset is like herion to engines though, as they love it...but it doesnt' love them back.

Quote:

Originally Posted by ForeignMuscle

I would like to try for 475whp with very close to even torque at 25+ psi on e85.

I'd say 450-475 would be possible, but you'd certainly need S4 cams and some RPM to play with. Big intake manifold too. In that same regard, I'd be certainly using an externally gated/extruded (or ported) setup for sure.

Quote:

Originally Posted by 801nismo104

Ill be running 20+psi on ny gtx2867r with sunoco 104 not E85 though. What size exhaust housing are you going to use? I have the 0.64 but I might switch over to the 0.86 to get the max potential out of it.

Agreed there. Again we're at that fine line of backpressure actually hurting top end (albiet while helping spool up)....which stinks...but we can't have both unfortunately.

Quote:

Originally Posted by Rafa-Z

Hey guys so I was going to run the cody ace manifold but got a great deal on a DOC race manifold with optional v band setup but Im still interested to know what mods do you guys do to the stock manifold? Do you port it or run it like that? How much is it usually to extrude and hone? Do you guys think the DOC racing one flows a lot more?
Also I got a great deal on a GT2871r .86 since I didnt have enough money to purchase the GTX2867r but to my surprise, the same day I got it Pure Turbos posted that they upgrade it to the billet gtx wheel for an extra 300 which saves me almost half of what I would pay for the other turbo. I plan on posting dynographs and everything once its all done. Let me know what you guys think.

The doc is tubular, so I don't see the extrude being worth it as that pipework is already quite smooth. I'd certainly get it coated, and I'd even go as far as to brace the manifold too to help further prevent cracking.

In regard to the Pure turbo setup I'd be interested to see, but I'm not sure if proof is in the pudding yet...it just seems too cheap yet.

Quote:

Originally Posted by ForeignMuscle

An sr engine has more displacement. I could use 12.5mm cams and I feel like I could push more than 24psi out of the gtx, but I could be wrong. Surely the thing is good for 450whp at least. If Codyace made 400whp with a 2871 and pump gas then I should be able to see close to 475whp with e85, 5 more psi, and the advanced timing that ethanol allows. No proof without puddin though.

I strongly believe with my S3's that the GTX is an easy 415-425 whp car at 20psi just based on maxing out things that were not maxed before. It's a hell of a turbo.

Quote:

Originally Posted by Croustibat

TBH that CA, while very efficient, is boring with that turbo. When it had a gt3071r it has some kick to it. Now it has a big fat powerband... but it is boring. It accelerates very fast fast, but there is no "turbo feel", no kick in the butt.

It's funny you say that as I've had plenty of people say 'man this car doesn't really feel that fast' and I like to point them over to the speedometer racing the tachometer

Rafa-Z · 02-14-2013, 12:34 PM

Sorry I didn't mean porting the DOC race one I meant porting the stock one. I will definitely get it coated or wrapped. I had an Isis version 2 and it never cracked but I have the PBM cobra downpipe and it has a flex pipe. I use to daily the car in Mexico and drift it very often.

Croustibat · 02-14-2013, 01:09 PM

Quote:

Originally Posted by codyace

It's funny you say that as I've had plenty of people say 'man this car doesn't really feel that fast' and I like to point them over to the speedometer racing the tachometer

That is exactly what happened. He wanted to demonstrate his new brake setup. I said "meh. Not impressed by braking power, and it seems you are locking the front easily". His answer was "ok, i will do it again, but look at the speedo this time".

In fact, he just accelerated to around 160mph like it was nothing, and then the brakes got the car back to 30 in what was a very very very short length of road. But the way the power was delivered felt like it was way slower.

This is a very efficient setup, for sure ... but it is no fun

ForeignMuscle · 02-14-2013, 09:29 AM

You're probably right, Croustibat. I like the "violent" powerband of a large turbo. I probably wouldn't be happy with such a smooth and linear powerband as a t2 turbo would offer.

I guess it's a good ole case of wanting what I don't have. I know I wouldn't mind setting that 3582 on my manifold for the weekend

huffandpuff00 · 02-14-2013, 01:38 PM

i dont think so, wouldn't be enough room for both wastegates. one is a tight fit.

di-devol · 02-14-2013, 01:55 PM

Quote:

Originally Posted by huffandpuff00

i dont think so, wouldn't be enough room for both wastegates. one is a tight fit.

I think he meant running only 1 wastegate, cutting a hole there with a divided housing opening both passages. You know?

ForeignMuscle · 02-14-2013, 03:16 PM

Why would you run twin scroll on a t2 turbo?

The thing already spools at damn near idle. It's a good idea, but it would be way over thought and not worth any of the work that would go into it.

If your going twin scroll step up to big boy turbos and go top mount.

codyace · 02-15-2013, 05:58 AM

Quote:

Originally Posted by Croustibat

That is exactly what happened. He wanted to demonstrate his new brake setup. I said "meh. Not impressed by braking power, and it seems you are locking the front easily". His answer was "ok, i will do it again, but look at the speedo this time".

In fact, he just accelerated to around 160mph like it was nothing, and then the brakes got the car back to 30 in what was a very very very short length of road. But the way the power was delivered felt like it was way slower.

This is a very efficient setup, for sure ... but it is no fun

That's funny that he was tricked haha. I do hear yea though, it doesn't have the wait for it, whip your head back 35r feel...which I do enjoy too

Quote:

Originally Posted by Slide~or~die

Question: Can you run a twin scroll manifold with this EWG set up? (GTX2867)

My reason for asking is because i dont see why this wouldnt work, but im not an expert.

Not at all, 2 reasons namely

1. the T2 turbine housings are not twin scroll. So while you could run a twin scroll manifold, it's really not proper without a TS turbine housing.

2. Even if it was, to cut such large holes in the turbine housing was undoubtedly fatigue it. Not to mention you'd never fit (well, about 99% sure) two gates in that area in a nice way.

Quote:

Originally Posted by ForeignMuscle

Why would you run twin scroll on a t2 turbo?

The thing already spools at damn near idle. It's a good idea, but it would be way over thought and not worth any of the work that would go into it.

If your going twin scroll step up to big boy turbos and go top mount.

100% agree.

01-07-2013, 02:14 PM	#1
PoorMans180SX Zilvia.net Advertiser Join Date: Nov 2005 Location: Michigan Age: 37 Posts: 5,616 Trader Rating: (16) Rides Gallery: PoorMans180SX Feedback Score: 16 reviews	I sure hope that's not the dyno, the powerband looks terrible. __________________ Build: http://zilvia.net/f/showthread.php?t=643065 Friends don't let friends buy knock-offs.

01-07-2013, 06:04 PM	#2
codyace Post Whore! Join Date: Dec 2004 Location: Poconos, PA Age: 40 Posts: 8,030 Trader Rating: (58) Feedback Score: 58 reviews	That's a wacky graph, and judging by the lack of top end retention we can all easily see how it was overspun the turbo to make the inflated number (which you can see many a times, especially on v8 turbo cars where they spin the balls off the turbo only to fall falt on the top end). I really need to get back to the same dyno in the spring as I went to for my 2871r setup, I know this turbo is certainly making more power. Love it. __________________ *Want Air Conditioning in your SR20 Swapped car? Check out www.sr20acbrackets.com for more information! Quest Alternator Conversions for SR20!* Check my Group Buy! Tired of lousy internal gates? Go external wastegate with one of my manifolds, Check out my group buy

01-18-2013, 04:48 PM	#4
cotbu Post Whore! Join Date: Sep 2005 Location: SWFL Age: 50 Posts: 3,318 Trader Rating: (3) Feedback Score: 3 reviews	No creep here from v44 stock manifold __________________ LoverTechnologies "Half Broken Things!"

01-20-2013, 03:50 PM	#8
Def Post Whore! Join Date: Apr 2004 Location: Houston, TX Posts: 2,701 Trader Rating: (16) Feedback Score: 16 reviews	I'd go with a MVS 38 for a turbo like this. Should be plenty fine. As for porting the stock manifold - it needs it BADLY. I spent about 8-9 hours on my manifold and took off a little over half a pound of material. The tooling clearance bumps are ridiculous, so that's the first place to start. Then work on smoothing things out and gasket matching them. I also put anti-reversion port shapes on the mani (larger than head ports). Basically opened the ports out to the gasket on the mani with a good 20-30 deg taper into the port. That also helps with any mani to head alignment mismatch. __________________ S13 Hatch - Goes around tracks quickly DEFSPORT

01-18-2013, 01:22 PM	#3
huffandpuff00 Zilvia Addict Join Date: Jul 2006 Location: oregon Age: 39 Posts: 835 Trader Rating: (9) Feedback Score: 9 reviews	Both sizes will work fine, but the 38mm is cheaper and more compact, so why pay more for 44mm... unless you think you might still get creep. another member on here said they still were getting creep w/ a 44mm on a oem sr manifold. anyone else have creep issue?

01-20-2013, 03:24 AM	#5
Rafa-Z Leaky Injector Join Date: Oct 2006 Location: Chula Vista Posts: 134 Trader Rating: (12) Feedback Score: 12 reviews	thats exactly what I was thinking why pay $100 or more and im sure even if it gave me some boost creep it would be way less than an internal one, I'm guessing. Anyhow im guessing that by the time I need to upgrade it will be for a twin scroll setup and it can always be sold.

01-20-2013, 08:07 AM	#6
Seraphim38 Zilvia Addict Join Date: Oct 2010 Location: Washington Posts: 810 Trader Rating: (6) Feedback Score: 6 reviews	I would be surprised if a 38mm would creep on a gtx2867r. Heck, I ran a GT2871r at anything from 7psi to 20psi on the internal gate and it never creeped on me.

02-05-2013, 03:52 AM	#9
huffandpuff00 Zilvia Addict Join Date: Jul 2006 Location: oregon Age: 39 Posts: 835 Trader Rating: (9) Feedback Score: 9 reviews	anyone check this out...http://zilvia.net/f/forced-induction...ml#post5124337

02-05-2013, 08:58 AM	#10
di-devol Zilvia FREAK! Join Date: Jun 2010 Location: Woodinville Age: 43 Posts: 1,412 Trader Rating: (5) Feedback Score: 5 reviews	^Wut? Didn't know that was possible.

02-05-2013, 05:12 PM	#13
ForeignMuscle Zilvia Addict Join Date: Feb 2012 Location: Ya momma's house Posts: 860 Trader Rating: (16) Feedback Score: 16 reviews	Anyone running big boost with e85 on one of these?? I have a $12k sr20 that I'm about to sell in lieu of a stock sr20 with a head gasket, head studs, CodyAce mani, JWT s4 or c1 cams, and the GTX2867. I would like to try for 475whp with very close to even torque at 25+ psi on e85. Just wondering if anyone else has used this turbo with fuel.

02-07-2013, 09:36 PM	#17
801nismo104 Zilvia Member Join Date: May 2010 Location: Utah Posts: 233 Trader Rating: (8) Feedback Score: 8 reviews	Ill be running 20+psi on ny gtx2867r with sunoco 104 not E85 though. What size exhaust housing are you going to use? I have the 0.64 but I might switch over to the 0.86 to get the max potential out of it.

02-14-2013, 01:17 AM	#18
Rafa-Z Leaky Injector Join Date: Oct 2006 Location: Chula Vista Posts: 134 Trader Rating: (12) Feedback Score: 12 reviews	Hey guys so I was going to run the cody ace manifold but got a great deal on a DOC race manifold with optional v band setup but Im still interested to know what mods do you guys do to the stock manifold? Do you port it or run it like that? How much is it usually to extrude and hone? Do you guys think the DOC racing one flows a lot more? Also I got a great deal on a GT2871r .86 since I didnt have enough money to purchase the GTX2867r but to my surprise, the same day I got it Pure Turbos posted that they upgrade it to the billet gtx wheel for an extra 300 which saves me almost half of what I would pay for the other turbo. I plan on posting dynographs and everything once its all done. Let me know what you guys think.

02-14-2013, 07:26 AM	#21
ForeignMuscle Zilvia Addict Join Date: Feb 2012 Location: Ya momma's house Posts: 860 Trader Rating: (16) Feedback Score: 16 reviews	I might not have put the "5psi more" in best terms. I meant 25psi on an sr20. It's not really a set number I wanted rather an itch to start over and build another engine to the max. I get bored easily I guess. I may just keep my current setup and build a t2 powered engine on the side. I believe my top mount, billet Precision 5858 actually spools faster than my 2871 did. I would love to have the torque of a t2 based turbo though.

02-14-2013, 07:34 AM	#22
Croustibat Nissanaholic! Join Date: Aug 2011 Location: France - Toulouse Age: 44 Posts: 1,851 Trader Rating: (0) Feedback Score: 0 reviews	TBH that CA, while very efficient, is boring with that turbo. When it had a gt3071r it has some kick to it. Now it has a big fat powerband... but it is boring. It accelerates very fast fast, but there is no "turbo feel", no kick in the butt. I dont know how to describe it ... His owner agrees too. The replacement is a gtx3582r (yes, no typo here. yes, LAG, he knows ) , power goal is in the 600HP range (new gearbox is on its way too). His car is somewhat a demo car for the shop though. It really depends on what you do with the car, or what you want from it. If you want low down torque, you cant go wrong with a 2867... i dont know how it compares with your current setup though.

02-14-2013, 12:34 PM	#24
Rafa-Z Leaky Injector Join Date: Oct 2006 Location: Chula Vista Posts: 134 Trader Rating: (12) Feedback Score: 12 reviews	Sorry I didn't mean porting the DOC race one I meant porting the stock one. I will definitely get it coated or wrapped. I had an Isis version 2 and it never cracked but I have the PBM cobra downpipe and it has a flex pipe. I use to daily the car in Mexico and drift it very often.

02-14-2013, 09:29 AM	#26
ForeignMuscle Zilvia Addict Join Date: Feb 2012 Location: Ya momma's house Posts: 860 Trader Rating: (16) Feedback Score: 16 reviews	You're probably right, Croustibat. I like the "violent" powerband of a large turbo. I probably wouldn't be happy with such a smooth and linear powerband as a t2 turbo would offer. I guess it's a good ole case of wanting what I don't have. I know I wouldn't mind setting that 3582 on my manifold for the weekend

02-14-2013, 01:38 PM	#27
huffandpuff00 Zilvia Addict Join Date: Jul 2006 Location: oregon Age: 39 Posts: 835 Trader Rating: (9) Feedback Score: 9 reviews	i dont think so, wouldn't be enough room for both wastegates. one is a tight fit.

02-14-2013, 03:16 PM	#29
ForeignMuscle Zilvia Addict Join Date: Feb 2012 Location: Ya momma's house Posts: 860 Trader Rating: (16) Feedback Score: 16 reviews	Why would you run twin scroll on a t2 turbo? The thing already spools at damn near idle. It's a good idea, but it would be way over thought and not worth any of the work that would go into it. If your going twin scroll step up to big boy turbos and go top mount.