sweet99ss

iTrader: (41)

So I have a 99 z28 with full bolt-ons- Fast 90/92, SLP Lid, LT's, ORY, 3" cutout, 3400 stall, and pcmforless tune. I'm guessing I make somewhere around 360 rwhp now? What gains would I see adding a D-1SC running 8-9 psi? I would like to see 500rwhp adding the D-1SC and be able to trap 123+ mph. Are my expectations reasonable? What are possible gains with my setup and the D-1SC?

gnx7

iTrader: (28)

If you can set it up for e85 fuel I would say more than your block and stock transmission can take . That FAST90 is not friendly with boost as the later versions (92/102) didn't have bursting problems. With low boost like that it should be fine though... but higher will potentially have issues.

D-1SC also requires injectors, fuel system, and a retune. Above 550rwhp you are rolling the dice with your stock shortblock as piston ring lands fail and the stock rods are being pushed to their design limits. Some rod bolts would be smart!

.....there are guys running LS6 intakes in the 8 second zone with boost so if you need $ sell the FAST90?92 to setup this combo properly and get and LS6/ported stock TB.

I8UR4RD

iTrader: (16)

i was at 393rwhp...then did 9lbs....did 600 on the dot. but the car never made it out of the dyno session. cam specs will determine alot of it....but the general rule is 20 horses per lb of boost. several things can affect this. mainly heads, cubes, and your overall setup of the system. usually if you can avoid belt slip it really helps out. that is why most of us are going to be using an aster bracket at some point or another. if i were you i would not go beyond 8 lbs....and i would most def put in at least some head studs...at least...or those things will come off and ruin the motor most likely. my head blew off and coolant went onto the cylinder walls and cracked the entire block.....but i made my number. numbers are not as important as track times. with a lil over 500 you will be more than satisified while you save the 1900 needed to forge your motor, and the 1000 to have the block machined, and hopefully you can do some things your self and cut machine shop costs. just my 0.02 i am just going by what i have been researching over the past few years.

sweet99ss

iTrader: (41)

thanks for the post. Most of what you said is what I have been thinking about. Selling the fast 90 and nick williams 92 throttle body I could probably get $950 plus for that. And than sell my nitrous kit for around $600 and there is $1200 off the price of my procharger kit already. And going with boost I would like to rehook up my vent tubes on the back of the heads. I would like to hit a little bit over 500 rwhp so hopefully the stock block can hold up on about 8-9 psi for a decent amount of time. I currently have 45,000 miles. With everything set up properely I would really like to get 40,000 miles on the stock setup with procharger if that would be possible...

sweet99ss

iTrader: (41)

Now that I'm thinking about it I will probably only push 7-8 lbs tops starting off just to be safe. You're right about track times. If I could have a reliable 480-500 rwhp car that would run high 10's@120+ I would be happy. I want the D-1SC though so I can save up for a forged motor and make 550+rwhp down the road. I'm sure I will be happy with 7-8 lbs for awhile

02LS1ram

iTrader: (17)

Put a boost friendly cam in the motor with the correct supporting mods to handle it, set of ARP head studs, and meth injection kit to help keep it alive. All I takes is one bad tank of gas and boom! Also don't even mess around with factory procharger J-bracket and get the aster setup alot less headaches then trying to stop belt slip. With the said stuff I wouldnt even think twice to run 8-10psi. Do a compression test on the motor, if it has good compression then let her eat. 500hp won't be a problay at all with 8psi

sweet99ss

iTrader: (41)

I don't want to put a cam in it if I'm going to boost. I would like to get as good of gas mileage as possible if I'm dropping 7k for a procharger. I will read up about meth injection, but I'm really not wanting to have another thing to be buying on a reg basis... I'm guessing 91 octane is all that should be ran with a procharger and nothing less correct?

I8UR4RD

iTrader: (16)

if that is all you can get, but 93+ is preferred, but just tell your tuner to make it very safe. then add methanol if possible. I did not see any significant decrease in my fuel consumption when I added my cam. the cam is what wakes these cars up. But hey, that stock cam, will not inhibit you at all. But your numbers will prob stick around low 500's. which honestly is where you are going to wanna be anyways to let the stock bottom end eat for a lil while, head studs are still a good idea. I might even go as far as to say drop the pan and do rod bolts, but then i would be a hypocrite because I sure as hell didnt. And that is where this came from.

JRENIGAR

iTrader: (37)

ooowwww.... that hurts....