GTX2863R vs GTX2867R vs GTX3071R

[jamesm]

Originally Posted by diss7

I just can't see how a gtx3076 is feeling just the same as a gtx2863/7r

The 76r graphs I've seen don't hit peak torque until 5500rpm or later. The 67r is closer to 4000rpm

That's basing my understanding that the point where a turbo has reach max psi (in other words, fully spooled" is where max torque is. Or at least where it stops significantly ramping up.

Happy to be proven wrong.

But at this point I can't swallow that stepping up to a 3076r from a 2867r is "not all that different"

Just take a ride in one. I wouldn't have believed it either.

[jamesm]

My gtx2867r does not stop making power (or full boost) until redline. It's all in the cams and boost control, for which I use a simple hallman mbc.

[loafy777]

Sorry to dig up this old post but... @diss7, you mentioned having previous experience with the GT2876R or GT25/40R and how it wasn't a great choice on your ae86.

Would that be an equally poor choice on the FA20? I ask because I happen to have an unused GT25/40R .86ar sitting in my garage which makes the $950 savings a pretty enticing notion so long as it's not god awful.

Thoughts?

[diss7]

If you've already got it, then try it.

[diodelphi]

Originally Posted by Mrc@ptuning

Stick with the GT3076 .63 and you'll be happy for a while even with upping the boost down the road. We did not see any gains in power or spoolup on the GTX3071R vs the GT3076R both .63 A/R at around 310-320whp on the dyno. On paper you would expect the transient response to be slightly better with the 71 but it's not enough to tell with the butt dyno. The 30R really shine when you get into the 400whp range, where as the 28s will start to run out of steam.


I'm currently running the GTX3076R with my setup and the spoolup is a tad slower than the GT3076 but again transient response and spoolup seems the same on the road. The GT30R works great on this motor and gives you a lot of room to grow when you get that itch for more power. There's no one magic turbo to fit everyone's need. You just have to pick and choose your weapon based on the type of driving/racing you plan for your car.


You can't really choose a turbo based on how it performed on another motor/vehicle. For example, a GT30R on an Evo 8 4G63, is mediocre, where as that same turbo on a S2000 make awesome power--with the right turbo system setup of course. So I don't know if it makes sense to expect the same result from the same turbo on say an EJ25 vs FA20.

Do you have any idea about EFR 7163 in comparison with GTX2867 or GTX3076 ?
my target is 330whp (dynodynamics) on stock FA20 12.5 CR

[Mrc@ptuning]

Originally Posted by diodelphi

Do you have any idea about EFR 7163 in comparison with GTX2867 or GTX3076 ?
my target is 330whp (dynodynamics) on stock FA20 12.5 CR

unfortunately, we have no idea on how the EFR turbo will perform against the GT turbos. That might be something we test out in the future.

[cdrazic93]

There ya go @Mrc@ptuning @diodelphi

http://blog.perrinperformance.com/bo...test-and-tune/

[Mrc@ptuning]

Originally Posted by cdrazic93

There ya go @Mrc@ptuning @diodelphi

http://blog.perrinperformance.com/bo...test-and-tune/

A true test would be to have the same turbo system setup, ie. IC piping, intercooler, downpipe, WG, Exhaust, etc, with only the turbocharger being different. On top of that having the same tuner, atmospheric conditions and dyno to perform the comparison. That would be quite a bit of work

[diodelphi]

Thanks PTuning
It seems EFR 7163 with single scroll setup for under 10psi is a good choice

[Andre Suwuh]

If the purpose of my car was to go to the track twice a month will a smaller turbo do me justice or is getting a bigger 3071R be better on the engine?

[Mrc@ptuning]

Originally Posted by Andre Suwuh

If the purpose of my car was to go to the track twice a month will a smaller turbo do me justice or is getting a bigger 3071R be better on the engine?

That depends on what kind of power levels you're looking to run which also depends on the type of fuel you have access to. We'll be releasing our version 2 of our turbo system shortly with options to run the GTX2867 up to GTX3076R.

[Andre Suwuh]

Originally Posted by Mrc@ptuning

That depends on what kind of power levels you're looking to run which also depends on the type of fuel you have access to. We'll be releasing our version 2 of our turbo system shortly with options to run the GTX2867 up to GTX3076R.

Well ill have access to 93 pump gas and a occasionally e85 For drifting on a stock motor plus uel headers and an oft stage 2 tune. I enter corners going in at 50-60 and rev from about 4.5k to 6k.

[Mrc@ptuning]

Originally Posted by Andre Suwuh

Well ill have access to 93 pump gas and a occasionally e85 For drifting on a stock motor plus uel headers and an oft stage 2 tune. I enter corners going in at 50-60 and rev from about 4.5k to 6k.

What is your power goals. 300whp? more? You'll probably have to switch to ecutek for the tuning in order to be able to run flex fuel (e85). At this point you're probably leaning towards a GTX2867R.