Hi anyone out there know where to buy a cheap turbine for a cheap turbo. Im currently running a T3T4 with a .60 AR comp and a .63 Turbine, I believe it is a standard trim stage 1. It has the 5 bolt exh housing internal wastegate. It is currently on a 98 2.2 ln2 engine. Im looking to get boost a little earlier, and think a .48 turbine will get me what I want. I dont mind giving up any top end for more boost earlier. Its daily driven and 10-15 lbs boost is plenty. So I think a t3-t4 with a .63 turbine is overkill for what I want. So anyone know where to buy a cheap .48 turbine for this turbo? I looked on ebay a few times and didnt see anything. Im wondering if maybe I need to just buy a whole turbo, one with a .48 turbine on it and install it onto my turbo. thanks for any help.
I'm running a GT2860RS and it spools very quick...
I think I bought mine through importperformanceparts.net... Many places to buy....
i had a t3/t4 with your specs on my 98 s10 2.2 engine and it spooled at ~ 2500. thats pretty low. whats yours spooling at?
JOE L wrote:i had a t3/t4 with your specs on my 98 s10 2.2 engine and it spooled at ~ 2500. thats pretty low. whats yours spooling at?
I think at about 2400~2500rpm it's more than capable to add boost if you command a high enough TPS.
I've only driven the car about 4 times and I'm working on tuning the off boost VE right now.
so you want it to boost lower than 2500 rpm?
It starts spooling by 2500 yes, but I would like 5lbs or so at 2500 rpm. A .48 turbine would get me there I think. A t3t4 is capable of what 350- 400 hp. Im really only looking for maybe 230-250 hp at the wheels max. Im thinkin a t3-t4 is a bit overkill for my application. thanks for the replys.
I also should have mentioned that from my exh manifold I have a 2 foot up-pipe to the turbine flange. So this is probably hurting me some. But not nearly as bad as like a rear mount would be. Not sayin a rear mount is bad lol. But definately not as good as running the turbo right off the manifold.
tom jones wrote:It starts spooling by 2500 yes, but I would like 5lbs or so at 2500 rpm. A .48 turbine would get me there I think. A t3t4 is capable of what 350- 400 hp. Im really only looking for maybe 230-250 hp at the wheels max. Im thinkin a t3-t4 is a bit overkill for my application. thanks for the replys.
You're probably on the right track then - the only thing to consider is traction with the very high torque potential at low rpm, but you can use a boost controller to keep the wastegate open if fuel mileage become more of a problem or traction is an issue.
I had a T3/T4 with a .48ar turbine & .70ar compressor on my LN2 and it would hit max boost around 2800 RPMs.. Full head work & full 2.5 inch charge & exhaust piping.
heavyclutch wrote:tom jones wrote:It starts spooling by 2500 yes, but I would like 5lbs or so at 2500 rpm. A .48 turbine would get me there I think. A t3t4 is capable of what 350- 400 hp. Im really only looking for maybe 230-250 hp at the wheels max. Im thinkin a t3-t4 is a bit overkill for my application. thanks for the replys.
You're probably on the right track then - the only thing to consider is traction with the very high torque potential at low rpm, but you can use a boost controller to keep the wastegate open if fuel mileage become more of a problem or traction is an issue.
So I recommend to do some calculations and look at the compressor maps. GT2860 is already spooling at 1000rpm and capable of a few psi boost at 75% efficiency at 1500rpm, so this is pretty darn quick. When I look at a T2560 map it would ok up to 5-6psi boost but anything more and you will out flow it up top.
