BrownMagic

Hey guys curious to see what others think of my setup so far .. Car is first gen cts v weighing in around 4000lbs fully loaded. 6 spd manual with 3.42 gears , ls2 bottom end with untouched 243 heads and s400 88/96 1.10 t6. Will have custom cam from pat G along with forged rotating assembly. Heads will stay untouched.

Fuel system is still under construction .. Have some ID 1000's along with holley rails/reg/etc. Thinking I should be able to get away with dual in tank 450s to meet my goals.

Now when it comes to pistons and CR .. Would it be wise for me to stick around the 10.1 mark if I intend to run 94 octane pump? I have a meth kit for the car but would like to know if I should go with a lower CR

I've been told efficiency range for these borg units is around 20psi? My question is .. Is 20psi do able with a higher CR set up on pump gas? Or should I aim lower before i pull the trigger on a rotating assembly?

Car will be mostly street driven and e85 can be hard to come by where I am so I'd like to hear your suggestions on a good pump setup for my goals.

Would like to hit at least 1000whp .. Is that too much to ask for with pump + meth on my setup?

Any input appreciated

KyleLanter

iTrader: (2)

1k at the wheel is a lot to ask from pump gas and untouched 243's. Meth will help with your IAT's and allow a little more aggressive timing. 10.1 timing is fine and dual 450 pumps have been proven to handle that power level.

stmz28

iTrader: (9)

I would of went with a 1.32 ar
I have made 29psi with my s488 100mm exhaust wheel 1.32ar

SLOW SEDAN

iTrader: (13)

Agree, no point to the 1.10 housing on a V8.

Pump and meth will go a long way as long as your not scared to spray a decent amount and I run 100% M1. However, it will probably take more then 20psi to hit 1000whp just depends on how happy the dyno is.

tblentrprz

You'll be fuel limited to reach 1000whp without a lot of meth and rpm. Detonation is the killer. 10:1 at upper limit for pump gas and streetable cam. Tuning window will be smaller. Better with 9ish unless you limit whp to 600ish with safe tune at 10:1. Will need cool IAT to keep in safer zone. Cam spec'd to run in higher rpm would help meet 1000whp but not street friendly. Will require baby steps to tune. 1 rattle above 600whp can bend, break or burn lots of stuff.

A good plan by builder and tuner for street application and specified fuel will be key to longevity.

SLOW SEDAN

iTrader: (13)

lol fuel limited with twin 450's on pump gas... you high? We've made 700hp on a single pump, twins will do substantially more then 1000 on pump gas. 10:1 is nothing we run 19-20lbs with that all the time on 10.4:1 cars with 88mm and F1's, my car is over 11:1 with twins on pump and meth, 9:1 is for cars that plan to make well over 1000whp. If you hurt Gen4 internals with 600hp you are doing something seriously wrong, I've hit them with 30+ PSI without issue and with forged internals they have seen even more. 1000hp cam can be entirely streetable, no baby steps in tuning needed it sounds like you've never tuned a car before.

BrownMagic

I was just doing some research on the afr 225's .. Is that a better direction for me to take? Have been told the thicker deck also helps keeping them seated at higher boost lvls

BrownMagic

I also have a 1.32 housing in case the 1.10 chokes me up top .. Was told the 1.10 would have better street manners so I was planning on trying it out first

stevieturbo

A good set of heads will let you make the power easier, with less boost and for longer, and in general make more power everywhere.

AFR230's would be ideal, or the smaller version. With turbo, inconel exhaust valves are a sensible choice.

But I'd also say to aim for mid-low 9's for the CR. There is little to be gained from pushing high CR's, but plenty of risk.

BrownMagic

Awesome that's exactly what i was looking to hear .. Will talk to my tuner about that before ordering my internals

Thanks!

tblentrprz

Fuel limited, not volume but octane rating and knock suppression. How much whp with 91 have you made at what CI and IAT? How much water/meth did you spray?

SLOW SEDAN

iTrader: (13)