getting SR20 to 350-400 whp - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

05civse · 05-24-2007, 07:07 PM

So here is the deal, I have an S13 with a S13 blacktop SR20. The car used to feel fast for the first month that I was driving it, then I got used to it. I know it hasn't actually slowed down because it is still faster than the cars and bikes I raced when I first swapped it in. It has a built head with stock cams, stock bottom end, big FMIC, 3" turbo back exhaust, ect. (I’ll post the full list). I want to know some tried and true steps to make over 350 whp without too much boost (below 25psi). I plan on using a power FC for E/M. I would like to use the manifold it has on it (done a lot of custom work to it), but I could change it if need to.

I was looking at GT2871R's but haven't found any dyno graphs of them clearing 350hp. I know I don't want some huge turbo if I can get away with it. Basically, If you guys could list all the parts I would need (inj. size, turbo, ect.) to make a setup that can put down the numbers I am looking for that would be awesome.

Engine mods:

Engine:
 ’94 Blacktop SR20DET from 180sx
 XS Power turbo manifold (highly modified)
 XS Power turbo extension
 Crower Valve springs
 Crower Titanium Valve spring retainers
 Exedy stage one clutch
 Greddy V-SPL front mount intercooler
 Greddy aluminum oil pan
 Cometic headgasket (1.2mm I believe)
 New exhaust valve guides
 New valve seals
 Valve grind
 Ported head
 Head surfaced
 HKS SSQV blow off valve
 Walbro 255 LPH fuel pump
 300zx fuel filter
 Manual boost controller
 ARP head studs
 TC Sportline rocker arm stoppers
 Megan racing 3” flex down-pipe
 Megan racing 3” test pipe
 Motoria 3” cat-back exhaust

Thanks for the help!

Project3328 · 05-24-2007, 07:14 PM

cams, injectors, and fpr wud help

Wei240 · 05-24-2007, 07:25 PM

^^
clutch
and some type of ems

gt2871r should get you in the ballpark, and go take it to a dynojet dyno

eastcoastS14 · 05-24-2007, 07:32 PM

yep i agree with these guys...740injectors, 255lph fuel pump, enthalpy rom tune, act clutch and get yourself a wideband while youre at it and you should be golden

and oh yeah spend the extra $$ and get yourself a good tune

usdm180sx · 05-24-2007, 07:49 PM

If you go with an internal wg at that level I would lose the mbc and get an ebc just my 2 cents

sliEighty · 05-24-2007, 07:50 PM

dont forget z32 maf... id try looking at gt2540r

ctm_motortrends · 05-24-2007, 07:52 PM

Pulling 415 HP out of my S13 on a dyno.

steve shadows · 05-24-2007, 08:11 PM

Quote:

Originally Posted by 05civse

Engine mods:

Engine:
 ’94 Blacktop SR20DET from 180sxgood start
 XS Power turbo manifold (highly modified)
 XS Power turbo extension
 Crower Valve springs
 Crower Titanium Valve spring retainers
 Exedy stage one clutch make sure this is enough
 Greddy V-SPL front mount intercooler
 Greddy aluminum oil pan
 Cometic headgasket (1.2mm I believe)
 New exhaust valve guides yes
 New valve sealsyes
 Valve grind valve job-yes
 Ported headdoesnt do much dont need it
 Head surfaced of course
 HKS SSQV blow off valve
 Walbro 255 LPH fuel pump
 300zx fuel filter
 Manual boost controller works with external wg, but not very well at all with ineternal diaphram
 ARP head studsworks ok if you torque to 80 ft lbs on final
 TC Sportline rocker arm stoppers
 Megan racing 3” flex down-pipe
 Megan racing 3” test pipe
 Motoria 3” cat-back exhaust

Thanks for the help!

everything i didnt comment on looks good.

sound like your going economical

Now on turbo choice, i would go top mout, 38mm tial wg, use the manual BC, use a .48 ar turbin housing t3 with a 50 trim t4 compressor wheel, stage 3 turbine wheel, to4e housing.

Cams will be a must, go 264 step II. hks or stage 3 brian crower

the setup changes i suggest will give you a solid powerband from 4k-7800rpms if you wanted.

I suggest Power FC for your EMS and have someone else tune it who knows what they are doing. Get the kit with the Map sensor if you can.

cheers.

liv2drift045 · 05-24-2007, 08:31 PM

Now on turbo choice, i would go top mout, 38mm tial wg, use the manual BC, use a .48 ar turbin housing t3 with a 50 trim t4 compressor wheel, stage 3 turbine wheel, to4e housing.

i cant wait steve haha

but yea i was gonna say pretty much what steve did say.... if your gonna invest this much in a build FUCK XS POWER get something else

eastcoastS14 · 05-24-2007, 08:38 PM

my set up was:
s14 sr20
stock internals
T3/to4e 57 trim .63 a/r stage 3 wheel vband exit
custom made top mount mani
ssautochrome 38mm wastegate
deatschwerks 740cc injectors
walbro 255lph fp
fmic
z32 Maf
HKS filter
enthalpy rom tune
mild head work, port and polish
rebuilt block
hallman mbc

making 350rwhp at 17psi

05civse · 05-24-2007, 09:37 PM

I did lots of welding, smoothing, and bracing to that manifold to make it look decent enough to install. As for engine management I was planning on going to a power FC and having it tuned by a well-known shop around where I live.

Top mounts look bad ass, but I am worried about the heat by the brake master cylinder. It gets hot mow and I have a ceramic-coated shield between it and the manifold.

I don't mind if I fry the clutch, I assume it will happen very soon if I can get that power.

The MAF will depend if I go to a MAP setup

So basically it looks like I need
**740cc inj.
**Possibly a Z32 MAF
**Manifold (depending on turbo)... I think I would like to stay bottom mount if I could fit it. Thoughts?
**Turbo. Lots of options it looks like. I am not all that hardcore into compressor maps and stuff so I am a little lost on this stuff, even though it is the most important.
** W/G depending on turbo. I also think I may want to stay internal if at all possible
** Power FC
** Cams.. What would the stock ones limit me around?

So I see like $3,500-$4,500 and some extra. What would you estimate?

Am I going a little overboard that I just want something that just feels really fast? To the people that are around this power, do you like it? Would you want more? Or is it about right?

Thanks so much for the ongoing help guys!

KA-T_240 · 05-24-2007, 09:59 PM

you WILL need a z32maf. more then likely a differant clutch. top mount(suggested), gt2871r at the smallest i would suggest a gt30XXR, if you go topmount go to external WG and open dump(if you can get away with it in your area)

*Nismoknightska-t* · 05-24-2007, 10:16 PM

HKS GT-RS, 720in, Z32 maf, Power fc!!!!!!!!!!!!

eastcoastS14 · 05-24-2007, 10:25 PM

HKS GT-RS if you want to buy an overpriced turbo....

to the OP keep your eye on the forsale pages...i just sold my t3 and 740injectors for $600 you can get pretty good deals if you keep an eye out...i got more turbo stuff fs if your interested

staygold24 · 05-24-2007, 11:04 PM

stock manifold.
gt2871r .64
z32 maf
740cc injectors (deatschworks are cheap)
jwt s3 cams
tomei or apexi hg. not cosmetic.
arp headstuds are ok at 80ft lb as recommended earlier
enthalpy tune

now if you want 400whp then get the greddy intake manifold

good torque, good powerband and great reliability

Edit:Steve, what is your reasoning for always going top mount the t3/t4 50 trim?

gt2871r spools up sooner and can retain stock manifolds and everything and still make decent power. This is by no means a jab at you, I just always see you recommend it on here and also on freshalloy. Pm me if you dont want to clutter up the thread.

05civse · 05-25-2007, 08:40 AM

Well, the MAF depends if I go to a MAP setup with the power FC. I necessarily want 400hp just 350 and above. If going top mount would end up costing me an extra 2 grand for not that much power it wouldn't be worth it to me. although on the other hand, A better manifold wouldn't be a bad idea.

Lets say on a budget of $4k what could I Assembly and make good power on my stock bottom end. Keep in mind I would run lower boost just driving around and I don't want to blow my bottom end up the first month by way over working it.

drifting_changed_mylife · 05-25-2007, 08:58 AM

Quote:

Originally Posted by ctm_motortrends

Pulling 415 HP out of my S13 on a dyno.

THATS PRETTY GOOD! WHATS UR SET UP???

DOOK · 05-25-2007, 09:07 AM

I just so happen to have a T3/To4e AR .60 exhaust .63, stage 3 wheel, top mount manifold custom made to pull the turbo further away from brake booster and master cylinder and also clear S14 stuff like I have installed on my S13, TiAL 38mm and Q45 MAF. It's all at a FRACTION of your estimates bro. I'll take 1300 plus actual shipping. All stuff is brand new, 0 miles. Came upon some rough financial times and I've had to abandon the project for now.

here is a link.
http://www.zilvia.net/f/showthread.php?t=144821

PM me if interested.

05civse · 05-25-2007, 02:08 PM

What is everyones thoughts on that? ^^^^^ looks like it has been sitting a while though. sounds interesting

DOOK · 05-25-2007, 02:33 PM

Quote:

Originally Posted by 05civse

What is everyones thoughts on that? ^^^^^ looks like it has been sitting a while though. sounds interesting

been sitting since november

liv2drift045 · 05-25-2007, 02:37 PM

thats a go... and its a pretty good deal too all you need is a downpipe.... thats a similar setup to what steve recommended just slightly larger... it might be a LITTLE more laggy but not undriveable I say DO IT

DOOK · 05-25-2007, 02:39 PM

Quote:

Originally Posted by 8ggalant

thats a go... and its a pretty good deal too all you need is a downpipe.... thats the exact setup i plan on running for the same powergoals you have.. DO IT

come get it

statik · 05-25-2007, 02:42 PM

gt2871r .64 will hit 350whp, some have hit 400whp (codyace). You can stay bottom mount and you will have full boost by 3500rpm

as everyone else said, wideband, 740cc injectors, z32 maf if going maf, rom tune if not going standalone, and a good set of cams

liv2drift045 · 05-25-2007, 02:45 PM

Quote:

Originally Posted by Ltdnismoracer4

come get it

Haha caught me while I was editing. I don't have the loot right now man AND the exact turbo I want (the one Steve mentioned above) one of my buddies is holding for me.

DOOK · 05-25-2007, 02:48 PM

I'm not picky about buyers, either of you can get it haha

05civse · 05-25-2007, 05:23 PM

^^ thinking about it. I just dont know a ton about turbos, so I am waiting to hear what all those seasoned vets. on here have to say. How much did you pay for all that? if you don't mind me asking. It would be fun!

I was also thinking about a 3071R with a t2 housing (i heared they made it)

Tearlessj · 05-25-2007, 05:36 PM

Where did you get that top mount and how much?

DOOK · 05-25-2007, 07:23 PM

Quote:

Originally Posted by 05civse

^^ thinking about it. I just dont know a ton about turbos, so I am waiting to hear what all those seasoned vets. on here have to say. How much did you pay for all that? if you don't mind me asking. It would be fun!

I was also thinking about a 3071R with a t2 housing (i heared they made it)

PMed buddy

DOOK · 05-25-2007, 07:25 PM

Quote:

Originally Posted by tearlessj

Where did you get that top mount and how much?

are you talking to me?

05civse · 05-25-2007, 07:44 PM

anyway, I think I may be loosing my mind. Now I am seriously considering pulling the engine and rebuilding the bottom end with forged pistons and new rods. I just noticed my front main seal is leaking a little, and I'm burning oil I figure out the rear turbo seal.

I don't know, the current bottom end gives me perfect comp. and 2% or 3% leak down on each cyl. (all the same). Would it be worth it to build it up? should I just say f it all and go to an rb25? I am questioning everything now.

I need some encouragement so I just don't give up.

choices:

-fix front main seal, then go to a bottom mount gt3071R, power FC, and big injectors ---like $3-$3,500

-Build bottom end, go to a T3 topmount, power FC, and big injectors--Like $5000

-sell SR, go to RB25 mildly stock --like $4,000

Would a built SR be way more fun than mild RB? Horsepower is horsepower i guess.

05-24-2007, 07:07 PM	#1
05civse Leaky Injector Join Date: Jul 2005 Location: out and about Posts: 125 Trader Rating: (0) Feedback Score: 0 reviews	getting SR20 to 350-400 whp So here is the deal, I have an S13 with a S13 blacktop SR20. The car used to feel fast for the first month that I was driving it, then I got used to it. I know it hasn't actually slowed down because it is still faster than the cars and bikes I raced when I first swapped it in. It has a built head with stock cams, stock bottom end, big FMIC, 3" turbo back exhaust, ect. (I’ll post the full list). I want to know some tried and true steps to make over 350 whp without too much boost (below 25psi). I plan on using a power FC for E/M. I would like to use the manifold it has on it (done a lot of custom work to it), but I could change it if need to. I was looking at GT2871R's but haven't found any dyno graphs of them clearing 350hp. I know I don't want some huge turbo if I can get away with it. Basically, If you guys could list all the parts I would need (inj. size, turbo, ect.) to make a setup that can put down the numbers I am looking for that would be awesome. Engine mods: Engine:  ’94 Blacktop SR20DET from 180sx  XS Power turbo manifold (highly modified)  XS Power turbo extension  Crower Valve springs  Crower Titanium Valve spring retainers  Exedy stage one clutch  Greddy V-SPL front mount intercooler  Greddy aluminum oil pan  Cometic headgasket (1.2mm I believe)  New exhaust valve guides  New valve seals  Valve grind  Ported head  Head surfaced  HKS SSQV blow off valve  Walbro 255 LPH fuel pump  300zx fuel filter  Manual boost controller  ARP head studs  TC Sportline rocker arm stoppers  Megan racing 3” flex down-pipe  Megan racing 3” test pipe  Motoria 3” cat-back exhaust Thanks for the help!

05-24-2007, 07:49 PM	#5
usdm180sx Post Whore! Join Date: Dec 2005 Location: 562 Posts: 4,807 Trader Rating: (5) Rides Gallery: usdm180sx Feedback Score: 5 reviews	If you go with an internal wg at that level I would lose the mbc and get an ebc just my 2 cents __________________ -Norm!

05-24-2007, 07:50 PM	#6
sliEighty Zilvia Junkie Join Date: Jan 2006 Location: Central pensyltucky Posts: 471 Trader Rating: (3) Feedback Score: 3 reviews	dont forget z32 maf... id try looking at gt2540r __________________ livin on the east cost is harder then you think... ECM for life lll

05-24-2007, 08:31 PM	#9
liv2drift045 Zilvia FREAK! Join Date: Feb 2005 Location: Chicagoland Age: 42 Posts: 1,483 Trader Rating: (7) Rides Gallery: liv2drift045 Feedback Score: 7 reviews	Now on turbo choice, i would go top mout, 38mm tial wg, use the manual BC, use a .48 ar turbin housing t3 with a 50 trim t4 compressor wheel, stage 3 turbine wheel, to4e housing. i cant wait steve haha but yea i was gonna say pretty much what steve did say.... if your gonna invest this much in a build FUCK XS POWER get something else __________________ StreetSliders.Blogspot.com

05-24-2007, 09:59 PM	#12
KA-T_240 Nissanaholic! Join Date: Sep 2005 Location: Moorhead, MN Age: 38 Posts: 1,788 Trader Rating: (0) Feedback Score: 0 reviews	you WILL need a z32maf. more then likely a differant clutch. top mount(suggested), gt2871r at the smallest i would suggest a gt30XXR, if you go topmount go to external WG and open dump(if you can get away with it in your area) __________________

05-24-2007, 07:14 PM	#2
Project3328 Zilvia Addict Join Date: Feb 2007 Location: Irvine Age: 41 Posts: 741 Trader Rating: (5) Rides Gallery: Project3328 Feedback Score: 5 reviews	cams, injectors, and fpr wud help

05-24-2007, 07:25 PM	#3
Wei240 Nissanaholic! Join Date: Sep 2002 Location: socal Posts: 1,778 Trader Rating: (0) Feedback Score: 0 reviews	^^ clutch and some type of ems gt2871r should get you in the ballpark, and go take it to a dynojet dyno

05-24-2007, 07:32 PM	#4
eastcoastS14 Post Whore! Join Date: Oct 2006 Location: the land of snow potholes and no tracks Posts: 3,984 Trader Rating: (1) Feedback Score: 1 reviews	yep i agree with these guys...740injectors, 255lph fuel pump, enthalpy rom tune, act clutch and get yourself a wideband while youre at it and you should be golden and oh yeah spend the extra $$ and get yourself a good tune

05-24-2007, 07:52 PM	#7
ctm_motortrends Zilvia FREAK! Join Date: Mar 2007 Location: MONTCLAIR Age: 43 Posts: 1,104 Trader Rating: (1) Feedback Score: 1 reviews	Pulling 415 HP out of my S13 on a dyno.

05-24-2007, 08:38 PM	#10
eastcoastS14 Post Whore! Join Date: Oct 2006 Location: the land of snow potholes and no tracks Posts: 3,984 Trader Rating: (1) Feedback Score: 1 reviews	my set up was: s14 sr20 stock internals T3/to4e 57 trim .63 a/r stage 3 wheel vband exit custom made top mount mani ssautochrome 38mm wastegate deatschwerks 740cc injectors walbro 255lph fp fmic z32 Maf HKS filter enthalpy rom tune mild head work, port and polish rebuilt block hallman mbc making 350rwhp at 17psi

05-24-2007, 09:37 PM	#11
05civse Leaky Injector Join Date: Jul 2005 Location: out and about Posts: 125 Trader Rating: (0) Feedback Score: 0 reviews	I did lots of welding, smoothing, and bracing to that manifold to make it look decent enough to install. As for engine management I was planning on going to a power FC and having it tuned by a well-known shop around where I live. Top mounts look bad ass, but I am worried about the heat by the brake master cylinder. It gets hot mow and I have a ceramic-coated shield between it and the manifold. I don't mind if I fry the clutch, I assume it will happen very soon if I can get that power. The MAF will depend if I go to a MAP setup So basically it looks like I need 740cc inj. Possibly a Z32 MAF Manifold (depending on turbo)... I think I would like to stay bottom mount if I could fit it. Thoughts? Turbo. Lots of options it looks like. I am not all that hardcore into compressor maps and stuff so I am a little lost on this stuff, even though it is the most important. W/G depending on turbo. I also think I may want to stay internal if at all possible Power FC ** Cams.. What would the stock ones limit me around? So I see like $3,500-$4,500 and some extra. What would you estimate? Am I going a little overboard that I just want something that just feels really fast? To the people that are around this power, do you like it? Would you want more? Or is it about right? Thanks so much for the ongoing help guys!

05-24-2007, 10:16 PM	#13
Nismoknightska-t Premium Member Join Date: May 2007 Location: Azusa, socal baby! why do i live this way?? it must be the money! Age: 39 Posts: 523 Trader Rating: (3) Feedback Score: 3 reviews	HKS GT-RS, 720in, Z32 maf, Power fc!!!!!!!!!!!!

05-24-2007, 10:25 PM	#14
eastcoastS14 Post Whore! Join Date: Oct 2006 Location: the land of snow potholes and no tracks Posts: 3,984 Trader Rating: (1) Feedback Score: 1 reviews	HKS GT-RS if you want to buy an overpriced turbo.... to the OP keep your eye on the forsale pages...i just sold my t3 and 740injectors for $600 you can get pretty good deals if you keep an eye out...i got more turbo stuff fs if your interested

05-24-2007, 11:04 PM	#15
staygold24 Zilvia Addict Join Date: Aug 2005 Location: St. Simons Ga Posts: 673 Trader Rating: (0) Feedback Score: 0 reviews	stock manifold. gt2871r .64 z32 maf 740cc injectors (deatschworks are cheap) jwt s3 cams tomei or apexi hg. not cosmetic. arp headstuds are ok at 80ft lb as recommended earlier enthalpy tune now if you want 400whp then get the greddy intake manifold good torque, good powerband and great reliability Edit:Steve, what is your reasoning for always going top mount the t3/t4 50 trim? gt2871r spools up sooner and can retain stock manifolds and everything and still make decent power. This is by no means a jab at you, I just always see you recommend it on here and also on freshalloy. Pm me if you dont want to clutter up the thread.

05-25-2007, 08:40 AM	#16
05civse Leaky Injector Join Date: Jul 2005 Location: out and about Posts: 125 Trader Rating: (0) Feedback Score: 0 reviews	Well, the MAF depends if I go to a MAP setup with the power FC. I necessarily want 400hp just 350 and above. If going top mount would end up costing me an extra 2 grand for not that much power it wouldn't be worth it to me. although on the other hand, A better manifold wouldn't be a bad idea. Lets say on a budget of $4k what could I Assembly and make good power on my stock bottom end. Keep in mind I would run lower boost just driving around and I don't want to blow my bottom end up the first month by way over working it.

05-25-2007, 09:07 AM	#18
DOOK Post Whore! Join Date: May 2007 Location: Land of Milk and Cookies Age: 42 Posts: 7,552 Trader Rating: (3) Feedback Score: 3 reviews	I just so happen to have a T3/To4e AR .60 exhaust .63, stage 3 wheel, top mount manifold custom made to pull the turbo further away from brake booster and master cylinder and also clear S14 stuff like I have installed on my S13, TiAL 38mm and Q45 MAF. It's all at a FRACTION of your estimates bro. I'll take 1300 plus actual shipping. All stuff is brand new, 0 miles. Came upon some rough financial times and I've had to abandon the project for now. here is a link. http://www.zilvia.net/f/showthread.php?t=144821 PM me if interested. Last edited by DOOK; 05-25-2007 at 10:26 AM..

05-25-2007, 02:08 PM	#19
05civse Leaky Injector Join Date: Jul 2005 Location: out and about Posts: 125 Trader Rating: (0) Feedback Score: 0 reviews	What is everyones thoughts on that? ^^^^^ looks like it has been sitting a while though. sounds interesting

05-25-2007, 02:37 PM	#21
liv2drift045 Zilvia FREAK! Join Date: Feb 2005 Location: Chicagoland Age: 42 Posts: 1,483 Trader Rating: (7) Rides Gallery: liv2drift045 Feedback Score: 7 reviews	thats a go... and its a pretty good deal too all you need is a downpipe.... thats a similar setup to what steve recommended just slightly larger... it might be a LITTLE more laggy but not undriveable I say DO IT __________________ StreetSliders.Blogspot.com

05-25-2007, 02:42 PM	#23
statik Zilvia FREAK! Join Date: Oct 2003 Location: Long Island, NY Age: 40 Posts: 1,358 Trader Rating: (0) Rides Gallery: statik Feedback Score: 0 reviews	gt2871r .64 will hit 350whp, some have hit 400whp (codyace). You can stay bottom mount and you will have full boost by 3500rpm as everyone else said, wideband, 740cc injectors, z32 maf if going maf, rom tune if not going standalone, and a good set of cams __________________ 97 240sx esaarr \| Current Status: SOLD

05-25-2007, 02:48 PM	#25
DOOK Post Whore! Join Date: May 2007 Location: Land of Milk and Cookies Age: 42 Posts: 7,552 Trader Rating: (3) Feedback Score: 3 reviews	I'm not picky about buyers, either of you can get it haha __________________ <------ Grumpy Old Asshole MY REVIEW THREAD: Ltdnismoracer4=DOOK http://www.zilvia.net/f/showthread.p...ltdnismoracer4

05-25-2007, 05:23 PM	#26
05civse Leaky Injector Join Date: Jul 2005 Location: out and about Posts: 125 Trader Rating: (0) Feedback Score: 0 reviews	^^ thinking about it. I just dont know a ton about turbos, so I am waiting to hear what all those seasoned vets. on here have to say. How much did you pay for all that? if you don't mind me asking. It would be fun! I was also thinking about a 3071R with a t2 housing (i heared they made it)

05-25-2007, 05:36 PM	#27
Tearlessj Nissanaholic! Join Date: Feb 2007 Location: Memphis Age: 33 Posts: 1,907 Trader Rating: (6) Feedback Score: 6 reviews	Where did you get that top mount and how much?

05-25-2007, 07:44 PM	#30
05civse Leaky Injector Join Date: Jul 2005 Location: out and about Posts: 125 Trader Rating: (0) Feedback Score: 0 reviews	anyway, I think I may be loosing my mind. Now I am seriously considering pulling the engine and rebuilding the bottom end with forged pistons and new rods. I just noticed my front main seal is leaking a little, and I'm burning oil I figure out the rear turbo seal. I don't know, the current bottom end gives me perfect comp. and 2% or 3% leak down on each cyl. (all the same). Would it be worth it to build it up? should I just say f it all and go to an rb25? I am questioning everything now. I need some encouragement so I just don't give up. choices: -fix front main seal, then go to a bottom mount gt3071R, power FC, and big injectors ---like $3-$3,500 -Build bottom end, go to a T3 topmount, power FC, and big injectors--Like $5000 -sell SR, go to RB25 mildly stock --like $4,000 Would a built SR be way more fun than mild RB? Horsepower is horsepower i guess.