Unachievable

iTrader: (2)

Long story short I have an NA LQ4 with a decent size cam. I'm going turbo Denmah style and I was wondering if someone could help me select on of the following turbos for the build. I'm not looking for a track animal just a 80% street build with around 650 rwhp. I know the "right" thing to do would be get a more reasonable cam but I'm looking for the best option of these below.

LQ4 Longblock
Ported and Polished 317
Stock Bottom End
Chinese Head Studs
Truck Intake
BTR Platnium .660 lift springs
Custom Grind Cam 235/246 113+3 LSATurbo Options
GT45 80 MM 1.15 AR
VSR 88 MM .96 AR
VSR 78/75 MM .96 AR

DavidBoren

That cam appears to be designed for high rpm performance, so I would get the big 88mm/.96 turbo. Even though the bigger turbo will take longer to wake up, it shouldn't matter (especially on a street car) because your cam is probably already pretty lazy down low.

That's just my opinion, but to be honest, I don't know ****.

Unachievable

iTrader: (2)

Right now its in a lq4 with ported and polished 706 heads connected to a T56 with 4.11 gears, it nice to drive on the street for the most part. Thanks for the help I appreciate the honesty, any other opinions.

JoeNova

S480 with the big 96mm 1.32 T6 turbine.

You'll have a hell of a time hitting 650whp with that cam on any of those turbos. If you start to build backpressure, its all over in the power department.

DavidBoren

I was going to say to go with a bigger turbo, but I wanted to answer with the choices he gave us.

If a bigger turbo is at all an option, I would absolutely go with the above mentioned s480l/t6/96mm/1.32 to avoid back pressure.

Overlap and back pressure just leads to exhaust reversion into the intake.

IronBlocked

S480 like JoeNova said or at least the 475 with the big turbine which is a couple hundred cheaper

Orr89rocz

iTrader: (13)

Out of those options gt45 80mm could do it. 77/88 mm turbine side is the biggest out of all those options. 1.15 ar. Edit: actually the 88 is said to be an 8883 so a 83 mm turbine. Now is that exducer or inducer? I assume its exducer? That may be a goof option for back pressure but the 88 wheel is abit overkill. T6 s400 is a proven combo to tho

Unachievable

iTrader: (2)

Thanks for all the responses, I may search the classifieds for a "more appropriate" cam if budget allows.

Beanslsxnova

iTrader: (1)

I have a brand new cam for sale that would work really well for you. I had it spec'd about a year ago by tick performance for a lq9 s480 combo very similar to yours. Pm if your interested