435rwhp@19psi GT3071R .63

[EchoOfSilence]

what i'm wondering is why your curves fall @ 6500? is that the turbo choking?

also, do you think you may achieve better response + more power with a different exhaust manifold?

would you ever go equal length?

[codyace]

Originally Posted by EchoOfSilence

what i'm wondering is why your curves fall @ 6500? is that the turbo choking?

also, do you think you may achieve better response + more power with a different exhaust manifold?

would you ever go equal length?

If directed to me:

The torque curve does fall off, but still at redline it's making near 285/290 ft lbs....I think mainly because it's a T28 at heart, but in the same respect I'm making 400 whp at the same time...so loosing the torque at that range of the rpm is the least of my concern...

And on track I tend to shift at 7k anyway...no reason to take her to the limit all day long....shifting to the next gear is right back in the sweet spot anyway, so it's more of a continuation of carrying speed, rather than making more...

I was in the works of setting up an exhaust manifold test with Full Race and their new bottom mount vs my swain/extruded OEM unit, but it ended falling through...mainly because FR wanted me to be running a tunable EMS vs my ROM to see if they could extract any more power out of it...not saying it is, but in my mind that basically tells me for all intensive purposes that mine performs equal to theres on ROM tune cars. Plus I like the idea of the factory log style manifold to help keep spool times fast as possible, and to create more low end trq.


Like before, I will be dynoing with cam gears here in the spring....maybe if I can find some extra duckies laying around, I'll get a new OEM unit and make a provision for external gate (like the FWD guys do) and go from there...

[hahahahaha]

okay i saw ur graphs and ur numbers and mods .. maybe compare it with my brothers .. as of what i know he should be getting the following items in and get tuned by nexy month or so

all items he all readys has but needs to get them in and tuned!!!

*gt2871r.64
*740cc injectors
*megan exh mani
*fmic
*hks ssqv
*brian crower 264 cams <-- didnt want the 272's cause he wanted a quick response
* brian crower valve springs with titanium retainers
* tomei 1.2 metal Hg
* greddy RAS
*arp head studs
*AEM EMS
*3.5 bar map
*full 3ich exh

and i think thats it well he has alot other lil bolt ons like sard fpr walbro fp and so on but those are the main things .. what do u guys think he's gonna get? i think its a lil similar to cody's just the fact that he doest have a rom tune or he doesnt have all the swian and porting or whatever that is on ur turbo .... also he will be getting tuned on pump gas 91 so yeah

[EchoOfSilence]

the swain coating and the extrude honing would make a big difference though

[codyace]

Originally Posted by EchoOfSilence

the swain coating and the extrude honing would make a big difference though

Undoubtedly...I credit that soley for making my car act like a disco potato on steriods

[hahahahaha]

Originally Posted by codyace

Undoubtedly...I credit that soley for making my car act like a disco potato on steriods

damm it so ur saying with out the hounding and so on there is no way to even see 400 whp?

also isnt the dico potato smaller than a 2871r? cause my friend made 375 whp on the a disco potao ... and i was impresed @ 17 psi with 340lbs of TQ and 100 octane .. o and also a built head hks camd and so on

[codyace]

Originally Posted by EchoOfSilence

What I think would be nice is a short-equal length manifold but obviously that's hard/inpossible I don't like the idea of log-style manifolds...

I really wonder what the gains would look like...certainly not worth the cost Im' sure...

The newer twin scroll setups are nice (that F/R offers on their top mount manifolds) and I believe they work well, but again, cost per users able to purchase them...

Originally Posted by hahahahaha

damm it so ur saying with out the hounding and so on there is no way to even see 400 whp?

I definatly think that copying my setup is about the only way to get near that mark with the t2 manifold...but regardless, anything over 350 whp with this turbo is unreal to drive...and will be damn fast as it is...aren't guys already in the 11's with slicsk with 350 hp setups??? That's fast.

Originally Posted by hahahahaha

also isnt the dico potato smaller than a 2871r? cause my friend made 375 whp on the a disco potao ... and i was impresed @ 17 psi with 340lbs of TQ and 100 octane .. o and also a built head hks camd and so on

Built head and the 100 octane maybe part of that reason....but that's really stretching that poor spuds effeciency range...if possible post a graph...I wonder how bad it died off....again total area underthe curve >peak power ANY day of the week.

[MaRshMaLLow]

wow those pics of the engine bay are insane !

['90RPS13]

So, I am going Thursday to the machine shop for my mani. So do I tell them I want a Top Mount Theoritical Length Manifold? Haha, first time I have ever needed a custom mani. Just trying to get a heads up.

[EchoOfSilence]

Is that like, the third or fourth time you've posted those same exact words?

the shop needs to know what the hell they're doing, and oyu to be sure of it
might as well go full-race if you don't want to extrude-hone your stocker


What I think would be nice is a short-equal length manifold but obviously that's hard/inpossible
I don't like the idea of log-style manifolds...

[hahahahaha]

yeah well a buddy of are's has about 320whp and hits 12.1 so yeah i figure anything above that will hit 11's on slicks and ill try and post a graph ill ask him for it .. also the dyno guys tried to squeez 400 out of it by raising the boost to 20psi but it made no more power so yeah

[EchoOfSilence]

stupid sr-det head...

[delphis]

not to rebump an old thread or anything but I found the same exact dyno sheet on brian crower website is this your dyno sheet on the site? if so congrats!

[KrazyZenki]

Yes that is my dyno sheet on brian crowers web site. Ive talked to him via phone a few times and I atribute my higher than normal hp numbers to his cams and my custom exhaust manifold.

[Z U L8R]

good stuff man, i love my turbo too. ball bearing turbos own. i may be going 35r soon so i may post mine for sale in the near future. it's been on the car bout 300 miles. gt30/71 flow their asses off, it kicks in bout3500 on my rb25 full boost is 4.0-4.1k, at 3700rpm it's making 350 ft lb's at 22psi, at 20 psi it's almost 260ft lbs. lol, huuuge difference in how it feels lol, good choice on turbo's, i can post my graph if you care +111 g/l

i'm running power fc, i wish i had datalogit so i can log my knocks, and we could probably add a little more timing but 20psi on pump gas with a safe tune (basically 12.0 a/f across the map) is pretty high, i usually'll turn it down to 17-18 unless i'm playing with someone.

a friend of mine just switched to aem ems from his old stand alone (don't know exactly) on his TT supra and he gained 175 ft lb's.....

i'd like to go aem in the near future, since everything can be logged, i can go map sensor, it can do 2 step, etc etc

AEM EMS ownz!

Series 1 RB25DET, internals = all stock, no headwork, stock cams, Commetic 1.2 mm headgasket + ARP head studs, GReddy Intake manifold, Z32 maf, blow through set up right in front of the q45 throttle body, 550cc deutche werks side fed injectors, ngk 3330's @ .028 gap , buick grand national coil pack /w 8.5mm msd ignition cables, XS Power exhaust manifold (modified flange so compressor would clear the valve cover), tial 38mm external waste gate recirculated, GReddy profec b (old school), Blitz Bov a couple inches in front of maf, 3" exhaust, basically bolt on rb25 /w HG + studs

[Z U L8R]

I'd like to get that dip out of 4k-5.5k with a little more timing but, without datalogit i can't log my knocks so it's good enough for now. 12.0 a/f across the map, pretty sure with cams/ported head my torque wouldn't fall off like that either, cause those turbo's flow like a mofo

GT30/71R = very good turbo

[KrazyZenki]

Nice powerband, nice setup!

[qt_240]

interested set-up with you manifold and turbo

[Boostedkouki]

Bitter!!! Lol J.k. looks a little like mine!!! i will get detailed pics tonight!!

http://img529.imageshack.us/img529/2433/13tp5.jpg

[Zerolift Autolab]

My 3071R SR20 Setup made 469RWHP - for sure has more left in it -
Because it was tuned on Base Fuel Pressure too.

[Graeter]

Quick question.

So if I`m reading this right, a single scroll 3071 .63 A/R can see full boost with a built motor before 4K rpms? Hmm.... possibly going to go this route!

And race gas power is 400-450whp?? nice so I would say a consistent safe 375whp is attainable providing a good motor?

[juggernaut1]

Yes T3 .63 3071 ....21 psi by 3600rpm and 285rwkw = approx 382hp max / approx 255rwhp by 4000rpm / 281rwhp by 4200rpm. Stock motor. Baby 255 inlet and 260 exhaust cams. Stock intake. Australian dyno dynamics. Pump fuel

[miller1775]

GT3071r with 4" inlet and 4bolt exhuast housing , Turbonetics topmount log manifold, arp head studs and cometic HG. PUMP Gas at 16lbs. Stock Bottom End. Currently pulled motor to do full build.

[2forty]

wow im surprised the power this turbo has been putting down. for some reason in my head i dont put it in the same category as the 30r, but closer to a 2871. i guess that gt30 wheel does wonders. does the 71mm wheel match better with the gt30 wheel than a standard 30r? 435@19psi on a dyno dynamic. thats more that steve put down on a 30r. And steve has countless hours on his tune. either way impressive numbers.