i want a supercharger

[camaroracer1992]

this winter my big project will be an underhood supercharger such as vortech, paxton, or a powerdyne. My motor specs are below, the motor is in sound shape and i realize ill only be running about 5-7psi non intercooled unless i can figure a way to put an intercooler in there. So give me your recommendations as sueprcharger size, etc. thanks.


355 dart block
10.3:1 nitrous pistons
solid roller 4/7 swap .624/.650 lift 252/262@.050 with 113 LSA
brodix race rite 200cc heads
exhaust, etc
edelbrock /FAST xfi fuel injection

[JL8Jeff]

If you're looking to race the car then I would skip the Powerdyne. I ran a Powerdyne 4.5 for almost 5 years with no problems on my old 93 LT1 but it looks like you'll be pushing a built combo so I doubt it would hold up. I would lean towards the ATI P1SC or D1SC self contained head units. From that point, you can do anything you want regarding intercooler or not. Is your trans and rear well built up? Because they will not hold up to the extra power very well.

[camaroracer1992]

i have a th400 with brake and a ford 9 inch detroit locked rear the drivetrain will hold up. the motor itself spins to about 6800rpms (redline)

[Pampered-Z]

I like the Procharger (ATI) or Vortech units, they have the best reputation for performance and dependability. Even though you're looking at lower boost numbers, don't buy the smallest unit, it's better to move up a size and spin the SC slower. As a centrifugal SC reaches it max RPMs/Boost potential, the efficiency drops, so you are better off spinning a bigger sc slower then spinning a smaller one faster. That said, for ATI I would look at a D1 or Vortech (I think the Vortech unit is now called the V2 is the model - use to be the T-trim?).

I prefer the SC's with external oiling, others prefer the self contained. I don't think one is better over the other, more personal preference.

For the intercooler, you have allot of options, Air~Air requires more area, water~air are smaller units, using remote tanks, but to me are a bit of a pain having to drain water and add ice between rounds. Then there are chemical intercoolers: water/meth injection, or even a small shot of Nitris.


I'm running a 3-core air~air that I mounted in the front. Below is a pic while we were mocking it up. I removed all the plastic from the front and have a grill covering it. Eventually I'll have fans mounted to push air through it for when I'm sitting at the line. I'm sure you could something similar with a 3rd gen.

[camaroracer1992]

whats your comp ratio pampered? how much boost are u running? what are your cam specs?

[Pampered-Z]

Originally Posted by camaroracer1992

whats your comp ratio pampered? how much boost are u running? what are your cam specs?

Final calulated CR is 9.2:1, Engine was built for big boost, but right now the SC I have is too small: P600B. With the smallest pulley ( listed as 15lbs ) it's maxed out at 6000 RPMs and I'm seeing 9-10 lbs on the gauge. There is just too much displacement for the Sc to feed.

I was actually planning to use a larger blower pulley and spin the engine higher and see what happened, but I spun main breaing first!

Anyway, the cam is a custom blower cam, actually a slight deviation from the Comp cam extreem blower cam. Same duration, just a touch more lift and LSA

224/236 dur, 520/530 lift with 115 LSA.

[camaroracer1992]

hmm i wonder how hard it would be to mount an intercooler liek that on my 3rd gen..... Id like to do the install my self and just have the place that did my efi tune it. I was only looking to run 5 or 6 lbs of boost on the 10:1 motor i have. I figured if lt1's with 10.5 can run 7 i should be able to run that. What size injectors would i need? I have 28# now

[Pampered-Z]

Originally Posted by camaroracer1992

hmm i wonder how hard it would be to mount an intercooler liek that on my 3rd gen..... Id like to do the install my self and just have the place that did my efi tune it. I was only looking to run 5 or 6 lbs of boost on the 10:1 motor i have. I figured if lt1's with 10.5 can run 7 i should be able to run that. What size injectors would i need? I have 28# now

What normally fails on the LT1s in the crappy stock pistons, they break aapart around the ring lands. If it wasn't for that I'm sure they could handle a few more LBs.

Pull the nose of the car and start mesuring, something will fit. Heck, I've see cars with the intercooler/exchanrger mounted where the passenger seat should be. You shouldn't have any problem mounting a Vortech unit, that are water air and fairly small yet effective.

I'm running 48lb injectors and making about 480WRHP and I'd guess 525-550HP would max then out. Nice thing is that now you can up to 60LB injectors that are low impedance so you can drive them with a stock computer.

[camaroracer1992]

i was looking to stay with air-air since its low maintenance for the most part. I dont know what impedence my FAST XFI uses for injectors, currently i am pushig 450 at the flywheel approx so i guess id run 50 or 52# ers on mine? like i said i only want to run 5-7psi roughly as i dont want to rip my motor apart for diff heads or cam. Even with a high comp ratio i should still see a decent power gain. At the strip id plan on spraying 150 shot and running 110 or 114 gas in it to keep the detonation down.

[Pampered-Z]

I believe the FAST uses Low Imp. so you can drive large injectors with it.

I'm not real familiar with the FAST unit, but most aftermarket systems have outputs that can be programmed for activation at certain RPM windows or throttle position. A bit out of area of knowledge, but you can probably run something like a 80lb injector and be able to add fuel with them for the nitris, you may not need to run a seperate fdedicated fuel system etc.

I actually haven't played much with it, I have an Electromotive DFI ( not installed yet ) but by using a two bar MAP it will "read boost" I can activate nitris and change to timing/fuel tables accordingly. The FAST is a much newer system then mine so you probably have the same or better?