I've got a chance to add a larger turbo to my IX and was steered in the direction of a GT3076.

First off, I have no idea what the 3076 is - compared to the well known 3071. What's the diff here - and how will it affect my spool up? (I've checked the search)

My goal - 400wtq on 93oct, with the mods in my sig plus a larger turbo. I roadrace, so I need something with a decent spool up.

Ideas sincerly appreciated.

 

GT3076R background

and more from searching evom

 

16+ Pages on the search button
3071 vs. 3076
https://www.evolutionm.net/forums/sh...highlight=3076
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https://www.evolutionm.net/forums/se...archid=3022826

 

My mistake - I typed in 0376R in the search.

From what I've read so far, the 3071 is better on 93 than the 3076. And a better DD turbo.
I wont have alk or meth or C16/100oct.

But the 3076 kit is cheaper for me than the 3071. Tough decision.

 

A 50 trim is also a good option. It has decent spool and power on pump gas.
Turbotrix 50 trim turbo kit?

 

Honestly it is all about your driving habits. I have a RnR gt35R kit and as long as you stay in the 4500rpm range you will spool and go nicely. I see you aiutocross so the 3071 may be the better turbo for you.

 

I do Track Trials with SCCA - which is 3-5 hot laps around a race track. I rarely dip below 4K revs.

Can I break 400wtq on pump gas with a 3071 or 50trim? -

 

You might wanna wait till Buschur releases the upgraded version of the 20G-9-5. With a bolt-on you'll be able to keep the stock look, if that matters to you. DB says it'll hit 20# by 3500 RPM.

Why don't you want to run higher octane gas for track events? I would do it just to help avoid the risk of destructive detonation at sustained high combustion temps on the straightaways.

Most of the turbos you mention like the 3071 and 3076 really only come into their own at the higher boost levels. Why would you wanna risk your engine by running 26-28# on pump gas?

You could probably get almost as much power with your stock IX turbo at 27# on race gas with a high-timing race tune than you would on a GT series at 23# on pump gas with a low-timing street tune.....

Just me, but if I was gonna go to the trouble and expense of a full turbo kit I would look into a 3065 or a 35R. Otherwise, I'll stay with a stock upgrade turbo.

 

3076r is a good turbo. I made 397whp on 23psi pump gas on a flash. But all in all these turbo's dont show their colors until you go over 25psi.

 

3076 = 500rpm later spool than 3071, but holds its power better up top.

 

Nice pump gas #'s

 

The 3076 will make more power, but the 3071 will spool sooner.

BUT if you're considering a 3071 because you want quick spool-up, you should probably get a ball-bearing 50-trim. It spools faster than a 3071 and holds power better up top.

 

oh yeah, FYI a 3076 and a 3037 are pretty much the exact same turbo.

 

I run a 3to1 mix of 93oct and C16 at the track - and keep the boost below 23. My flash is on the aggressive side - and I turned in 381wtq with the stock turbo, 100oct - at 26psi.

But for DD - i keep the boost at 21 - which cuts my power down to approx +-330wtq. I'd just like to be about to drive around town with 93 in the tank and close to 400wtq on tap - and keep everything in check while doing it. No C16 mix and no alky.

Maybe a 50trim is a better option. The ATP 3076R kit I've been talking about is $1800. Stock manifold. Just the turbo, E/WG, exh piping, etc. Basically bolt on stuff. I thought it would be a somewhat cheap upgrade.

 

Stay away from the 3071. The 50R (Garret BB 50 Trim) or 3076R are better choices. AMS has replaced the 3071 with the 50R in their lineup for good reasons. If low spool is critical vs. topend power, go with the BR 20G-9-5.