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cosworth m2 cams (stock pulley on exhaust cam)
custom intake (stock manifold, stock throtle), HKS airfilter
OBX intercooler
stock bottom end
HKS high power exhaust, stock manifold, tomei o2 and tomei downpipe (2.5 inch)
ID 1000 injectors, walbro fuel pump
HKS EVC-6 boost controller
I tuned this car using Russian 98 Ron fuel, I guess it is similar to something in between 91 and 93 US fuel.
Maximum horsepower I got from it was 392 WHP and 469 nm WTQ. I was running maximum boost 1,75 bar or 25,725 psi with stock low pressure actuator.
From my point of view it is not a bad turbo, it is a good bolt on solution, I guess more reliable then FP red. Soon I will be testing this turbo with Aquamist methanol kit.
YaroRS, that is good boost response for an open scroll housing, a twin scroll would see a 500rpm faster spool time!
It's a bolt on turbo to stock mitsu housing, so It's a twinscroll. I am sure it is possible to make this turbo spool better, I have small tomei o2 housing and tomei 2.5 inch downpipe. Later I will change it to MAP external dump o2 housing + 3 inch downpipe. I am sure this will give better spool.
On mine car it does 20 psi before 4000 revs.
Unfortunately we dont have in Russia E85 fuel, but I am sure this turbo will be capable to push similar numbers ATP showed us on my config with water/methanol.
have you considered a tubular manifold? from your dyno graph it looks like you high-end power is flattening out. an o2 external dump would be a great idea. maybe a mid-range, short plenum intake manifold + bigger tb as well lol? like skunk2? thats the setup im considering...maxing this turbo on pump gas, and using methonal injection as cooling only
do you have a baseline by any chance? what hp did your car made before?
Originally Posted by YaroRS
It's a bolt on turbo to stock mitsu housing, so It's a twinscroll. I am sure it is possible to make this turbo spool better, I have small tomei o2 housing and tomei 2.5 inch downpipe. Later I will change it to MAP external dump o2 housing + 3 inch downpipe. I am sure this will give better spool.
On mine car it does 20 psi before 4000 revs.
Unfortunately we dont have in Russia E85 fuel, but I am sure this turbo will be capable to push similar numbers ATP showed us on my config with water/methanol.
have you considered a tubular manifold? from your dyno graph it looks like you high-end power is flattening out. an o2 external dump would be a great idea. maybe a mid-range, short plenum intake manifold + bigger tb as well lol? like skunk2? thats the setup im considering...maxing this turbo on pump gas, and using methonal injection as cooling only
do you have a baseline by any chance? what hp did your car made before?
I've been thinking about a decent exhaust manifold, this is just the beggining . For me it was interesting what this car was capable to do with the simplest config.
I tuned my friends car with ETS manifold and MAP o2 downpipe. It developed extra 25-35 hp.
I dont have my baseline, since I had old FP Green turbo before. With the same config and FP Green the car showed 336 whp, with methanol aproximately 370 whp.
Spool up not as bad as I thought. Running about ~21psi at 4k
Just so you'll know, that's virtually identical to my spool characteristics ... except my turbo delivers almost 600whp out of 93 octane as opposed to 350whp. That's why the 3071 has never been a popular upgrade here. It's far too laggy for its power potential.
Just so you'll know, that's virtually identical to my spool characteristics ... except my turbo delivers almost 600whp out of 93 octane as opposed to 350whp. That's why the 3071 has never been a popular upgrade here. It's far too laggy for its power potential.
Just FYI.
Nice work! What turbo and other mods? 600whp on 21psi? Mine is just a 2L and base tune map
I have quite a few mods (see signature) and running 30psi or so with 93 octane. But the fundamental point I'm making is the 3071R gives up a lot of spool and response for its modest power potential, which is around 150whp less than the similar spooling GT35R variant I'm using. I understand you got a bargain where cost was concerned, but maybe it's not so much a bargain after all? Just food for thought...
I have quite a few mods (see signature) and running 30psi or so with 93 octane. But the fundamental point I'm making is the 3071R gives up a lot of spool and response for its modest power potential, which is around 150whp less than the similar spooling GT35R variant I'm using. I understand you got a bargain where cost was concerned, but maybe it's not so much a bargain after all? Just food for thought...
I remember Buschur testing the FP HTA3076 vs the HTA3586 and having similar results on his 2.3L, except the 3586 made a lot more power.
Any insight as to why two fairly different sizes turbos are so close in spoolup characteristics?
As Buschur noted, the difference in spool characteristics between 3071R, 3076R, and 35R are small as compared to the differences in power potential, with a 3071R delivering most of the lag of a 35R, but with far less power, and the 3076R somewhere in between. These observations were made all using open T3 exhaust configurations. To me this suggests that the inefficiency of the open T3 exhaust design tends to offset the advantage of the smaller/lighter compressor. In contrast, Drifto's HTA3076 with twinscroll 1.06 T3 outspooled my twinscroll T4 HTA3582 setup by 300 rpm, and still reached 600whp with E85. Based upon that observation, I would expect that a twinscroll T3 3071 with 'HTA' or 'GTX' treatment would also bring considerable improvements, but with factory-framed turbo options delivering the same or better overall performance without the expense of converting everything to a T3/T4 configuration renders the point largely moot.
I have quite a few mods (see signature) and running 30psi or so with 93 octane. But the fundamental point I'm making is the 3071R gives up a lot of spool and response for its modest power potential, which is around 150whp less than the similar spooling GT35R variant I'm using. I understand you got a bargain where cost was concerned, but maybe it's not so much a bargain after all? Just food for thought...
Ah nice work! Your car must fly! you americans have crazy builds haha. Seems like every 2nd evo is 500hp+ !! jelly.
Yeah, for sure. I totally understood that the turbo spooled slower for modest power potential, but my turbo was $850 US dollar.. cheap as chips.. I just wanted a turbo to bump up the power on the track I guess it just depends on how big ones pockets are as with this turbo, I can still be fairly ok with the stock gearbox and diffs and it's really a matter of an $850 vs $8500++ build.
As Buschur noted, the difference in spool characteristics between 3071R, 3076R, and 35R are small as compared to the differences in power potential, with a 3071R delivering most of the lag of a 35R, but with far less power, and the 3076R somewhere in between. These observations were made all using open T3 exhaust configurations. To me this suggests that the inefficiency of the open T3 exhaust design tends to offset the advantage of the smaller/lighter compressor. In contrast, Drifto's HTA3076 with twinscroll 1.06 T3 outspooled my twinscroll T4 HTA3582 setup by 300 rpm, and still reached 600whp with E85. Based upon that observation, I would expect that a twinscroll T3 3071 with 'HTA' or 'GTX' treatment would also bring considerable improvements, but with factory-framed turbo options delivering the same or better overall performance without the expense of converting everything to a T3/T4 configuration renders the point largely moot.
Buschur never tested the GT3071R. He just assumed it spooled the same as the GT3076R, which it doesn't. Transient response is also hugely different between a GT3582R and a GT3076R, but that also gets ignored for some reason. Yeah, on a dyno the GT3582R spools about 300 RPM later than the GT3076R, but in actual power delivery they feel very different. The GT3582R feels NOTICABLY more laggy. I can't speak to the newer HTA and GTX stuff though and nor can I speak towards the twin scroll stuff in that size range. I've only experienced the older divided T3 housings and they were never impressive to me. The new stuff seems like it works a lot better though.
The GT3071R doesn't offer any more flow then the IX turbo. That's the main reason it's useless in this community. The GTX3071R on the other hand does offer about 100HP worth of airflow over the IX turbo, but still pretty modest gains considering most EVO guys drag race and think it takes 700HP to run 10s. The stock frame stuff has kind of gone an odd direction with the FP housing and manifold. The fully setup costs almost what a T3 setup costs but it locks you into FP turbos.
Last edited by 03whitegsr; Sep 21, 2015 at 04:08 PM.
Oct 11, 2011, 04:28 PM
. For me it was interesting what this car was capable to do with the simplest config. 
That's why the 3071 has never been a popular upgrade here. It's far too laggy for its power potential. 
