How much boost
How much boost HEy, I've been building my turbo kit now and I was curious at what my CR might be so i can figure out how much boost i can run.
6.0L 317 Heads
2003 MLS 5-layer metal head gaskets
LS6 Manifold
85MM TB
Diamond Pro-Select Ring Sets (1.5mm x 1.5mm x 3mm)
Eagle Standard Weight “ESP” H-Beam Connecting Rods (6.125")
LS2 Timing Chain
Diamond Racing Street/Strip Flat Top Pistons (Bore 3.905/Stroke)
6.0L 317 Heads
2003 MLS 5-layer metal head gaskets
LS6 Manifold
85MM TB
Diamond Pro-Select Ring Sets (1.5mm x 1.5mm x 3mm)
Eagle Standard Weight “ESP” H-Beam Connecting Rods (6.125")
LS2 Timing Chain
Diamond Racing Street/Strip Flat Top Pistons (Bore 3.905/Stroke)
haha stock 98 camshaft. I'm not sure what the 5-layer MLS metal head gaskets compress too.
I bought the PTK hotside and I've built everything else. All goes on today and Friday (tomorrow for turkey day going to be booz'n it up and eatin' lots of turkey)
Also, how much boost can i safely run when i first get this setup together? I am planning on runnin a meth kit, but I'm probably going to keep low boost and work out kinks then get the meth and see how things go.
I bought the PTK hotside and I've built everything else. All goes on today and Friday (tomorrow for turkey day going to be booz'n it up and eatin' lots of turkey)
Also, how much boost can i safely run when i first get this setup together? I am planning on runnin a meth kit, but I'm probably going to keep low boost and work out kinks then get the meth and see how things go.
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Verdad Gallardo Thanks, it's all going through a stage 4 trans.
what would the biggest bottleneck for boost be? my piston choice? this originally was a n/a motor but i changed plans and went turbo instead, thats why i have those pistons. now i saw online a 2bar MAP sensor, should i go with this sensor? also, i've done some research about the MAF vs SD option and i think i'm going to keep MAF for now.
what would the biggest bottleneck for boost be? my piston choice? this originally was a n/a motor but i changed plans and went turbo instead, thats why i have those pistons. now i saw online a 2bar MAP sensor, should i go with this sensor? also, i've done some research about the MAF vs SD option and i think i'm going to keep MAF for now.
Thanks, it's all going through a stage 4 trans.
what would the biggest bottleneck for boost be? my piston choice? this originally was a n/a motor but i changed plans and went turbo instead, thats why i have those pistons. now i saw online a 2bar MAP sensor, should i go with this sensor? also, i've done some research about the MAF vs SD option and i think i'm going to keep MAF for now.
what would the biggest bottleneck for boost be? my piston choice? this originally was a n/a motor but i changed plans and went turbo instead, thats why i have those pistons. now i saw online a 2bar MAP sensor, should i go with this sensor? also, i've done some research about the MAF vs SD option and i think i'm going to keep MAF for now.
My old LT1 is still using a MAF, and only the 1 bar MAP sensor the car comes with from the factory, and I was still able to have a good safe tune at 15#'s of boost (8.8:1 CR) on the stock PCM, with pump gas and still made 614 RWHP. The LSX cars are MUCH easier both to tune, and make power with.
Agree, compression is gonna kill you. You'd be able to run more boost without running ridiculous fuel on top of meth. I'd be happy even at 9.7 because NA it's going to run slightly better than an 8.5 motor. Being able to run 14.7psi (2bar) will knock the **** out of you either way. It'll stay together... run it.
Its all preferance, my 408 is being built with some 317 heads and 8.5 cr for my turbo so I can run shitty 91 octane and no meth while being able to run more boost. I do have a meth kit and while most likely run it when I crank it all the way up for the track. Good luck
Thats pretty much the rundown of things. Run a lower CR say 8.5:1 and you can safely run high amounts of boost, and will need less octane or need of methanol to keep you safe. The downside is the lower the CR, the lower the NA power of the car, so it might be more of a turd down low until the boost kicks in. Personally I think this can be a good thing, as you won't be really a turd, and in that time frame you'll have traction until you build the RPM's and MPH to the point at which the *** load of boost kicks in and then you are gone like no-ones buisness.
The higher the CR, the more NA power, but the less boost you can run safely. Higher octane is needed, and or methanol injection, but you still will be limited to doing things safely.
Optimally, find the target boost amount you are looking for, and then have your motor/CR setup for it. I knew I would be somewhere in the 13-17#'s of boost range in my car, so we made a good safe CR of 8.8:1. This would probably support 22#'s of boost safely, but I wanted to be on the safe side. I still need 93 octane, and methanol injection, but the power doesn't come on until half way up the power band, and then I have good traction and it works out just how I want it. This is what I reccomend.
Here's a couple vids showing me run my car with cold Nitto DR's in 1st gear against a few other guys. This shows I do indeed hook up awesome in 1st gear even with 614 RWHP.
Click here to see Video
Click here to see Video
Click here to see Video
The higher the CR, the more NA power, but the less boost you can run safely. Higher octane is needed, and or methanol injection, but you still will be limited to doing things safely.
Optimally, find the target boost amount you are looking for, and then have your motor/CR setup for it. I knew I would be somewhere in the 13-17#'s of boost range in my car, so we made a good safe CR of 8.8:1. This would probably support 22#'s of boost safely, but I wanted to be on the safe side. I still need 93 octane, and methanol injection, but the power doesn't come on until half way up the power band, and then I have good traction and it works out just how I want it. This is what I reccomend.
Here's a couple vids showing me run my car with cold Nitto DR's in 1st gear against a few other guys. This shows I do indeed hook up awesome in 1st gear even with 614 RWHP.
Click here to see VideoClick here to see VideoClick here to see Video 
