The GT30 turbine wheel doesn't flow that well so it takes pretty high amounts of boost to make good power on the GT30 setups.

If you want pumpgas power, the GT35 turbine makes it a HELL of a lot easier.

 

it's all about setup. we made 470whp on 18psi with a plain jane gt3076 on a sr22.
twin scroll though, 18psi @ 3600rpm.

 

This is true, but what kind of power would that same setup make with a GT35 turbine in there...

People should really start looking at turbine flow maps though. A 0.86 A/R T2 housing GT28 turbine out flows the T3 GT30 in the 0.63 housing... The GT28 is only down about 8% compared to the 0.82 A/R T3 housing. Hell, a GT28 in a T3 housing might even match the flow of the GT30...

For comparison, the GT35R is 17% ahead of the GT30 in the same 0.82 A/R housing.

 

I found this graph, and it gives me some hope! https://www.evolutionm.net/forums/ev...as-470-hp.html

 

is that just for the housing?
Or the turbine + housing?

If they are both T3 0.82, wouldn't the extra flow be from the larger hole in the exhaust housing machined for the larger turbine wheel?
meaning more area for gas to escape, hence why it's flows more?

I thought that area (cm2) only changed with differing "T" platforms (i.e. 0.82 T3 and 0.82 T4 for same turbine are different cm2)

 

thats pretty impressive, good job

 

The most I was ever able to squeeze out of my 50 trim setup on 93 octane was about 420ish whp (on AMS' dynojet). I don't think the HTA3076 flows enough over the 50 trim to make up 80 whp on pump. You've also got an Evo 8 (like me) and higher compression pistons (unlike me), neither of which will work in your favor for your quest in max pump gas numbers. If you can squeeze a reliable 470 whp out of an HTA3076 setup, I'll be impressed.

l8r)

 

Bringing thread back from the dead Just manage that this past friday 472whp dynojet

 

I am getting my tune on thursday at ivey. hta3076 kit i will post my numbers i have a stock motor so i cant push it but we will see.

 

You have an Evo IX - I'm not impressed.

Nice numbers all the same, though.

l8r)

 

240twin is a freak lol. the stuff this guy does is crazy. i have a gtx3076 with a 1.06 ts t3 housing. on pump gas, stock bottom, gsc s2 mivec (stock mivec map) unported head, stock intake manifold i made 500+ on dyno get, at 27 psi. still had room for timing imporvement.

now i am on a 2.4l 10:1 compression and everything else same, pump gas. i made 450tq and 458 hp dyno jet. timing is maxed out, advancing any more looses power. boost from 27 psi to 28.5 psi gained me 12 hp. seems the turbo is maxed out at this stage. im thinking the head doesnt flow enough for a 2.4 and intake manifold is choking as well. at this point i dont know what using e85 would do.