Procharger quality issues?

[ProdigyCustoms]

Well, in VERY ROUND simple terms, typically on 93 octane pump gas, you can run about 8LBS to 10LBS on a 9:1 motor without intercooling. 10LBS is starting to push it. 8LBS to 10LBS will usually give you about a 40% to 50% increase of the NA power on a properly set up supercharged motor. By properly set up, I am referring to proper cam, induction, exhaust, compression, all specified to take advantage of supercharging.

With intercooling, as a rule of thumb, again, just a general rule, at a given octane (let's say 93 octane) you can add a additional 2LBS of boost for every 10 degrees of cooler ambient air inlet temperature you put into the engine. So if you can cool the air 30 degrees with a air to air intercooler(which you should be able to), you can run 14LBS to 16LBS where you could run 8LBS to 10LBS NON intercooled. The 14LBS to 16LBS will give you about a 80% to 100% increase in power. Actually this 100% gain is supposed to happen in the mid 14LB range (what is called one atmosphere), but that is in a perfect world, it usually takes more like 16LB to see a double HP gain in a non race, less then ideal street engine.



Also, understand that carburetors get more tricky as boost goes up. It is pretty common to be able to tune a 6LBS to 8LBS tune up with good idle, drivability, and wide open throttle. it get;s harder as boost increases to get all of these critical adjustments in a street car. usually driveability suffers, as idle and WOT are pretty easy.

I am a big advocate of fuel injection in boost situations of more then 8LBS to 10LBS

[Fultz1275]

Thanks for all the great info. It looks like that with my goal of making good power 550+ and the wheels and the fact that I'm not looking to run on the ragged edge of trying to squeeze every last once of power out of my motor, and that drivability is very important to me, I think I'm leaning towards the D1-SC w/o an intercooler at this time. I am going to give you a call on Thursday to discuss this more but given the following parts what would you do to make the motor more supercharger friendly:

383 (338 HP at the wheels)
Eagle rotating assembly
JE forged pistons
AFR 195 Heads
Performer RPM Airgap
Holley 830 race carb (mech secondary)
Comp Cams : XE284H-10 ( Dur @.50 IN-240 EX-246)
(Gross Lift IN-.507 EX- .510)
Compression: 9.6:1

Thanks again for all the help.