Trying to figure out what different people have done with carbed cars for forced induction. Im pretty well set on a p-1sc procharger, has anyone else ran this, or something different, do you have pics, suggestions?
my dad has a carbed GT with a P-600 Procharger. i dont have any pics but it runs really good. just a 302 with a 650 carb (i think), B-cam, Edelbrock 1.9/1.6 heads, and 3:55 gears with 14 lbs of boost it runs [email protected]
haha, i thought that impeller was a rim when i glanced at the thumbnail. Very nice, how much boost are you running and what are you doing for fuel enrichment? Im thinking about just putting 8psi on my 351W with a 750 and vic jr, I have also heard the vic jrs are lean for cyls 1458 because the runner length, would the middle be way too rich if i check the leanest plugs to see if i need more fuel or not? I am thinking about putting a wideband on it just to be safe.
I had one on my 350...B&M 144 Roots blower, i think Jyro is running a similar blower but with more boost and alcohol and laying down some sweeet times (9's & 10's all day long, EVERYDAY)
I didnt like my blower, the 144. It only created 5 PSI and was a bitch to keep cool during the summer heat (I had an e-brock aluminum water pump, 3 core heavy duty radiator & electric fan) and still couldnt hardly keep it cool while sitting at a light. I never could get the car tuned, but i was running a HEI system and it was internally advancing the timing (creating too much timing) and making the car run like shit. I didnt know this untill i got rid of the blower and then switched to MSD.
The tune of the car does not really change very much. You still have to tune it in the same fashion as N/A.... read plugs. As long as max boost stays the same the tune is stoch.
I had a 144 B&M on a 2180cc VW motor and used a Holley 750 DP running 18#'s of boost an I thought it was GREAT!! LOL but that was a flat 4 cylinder A roots style blower will almost MANDATE alcohol fuel with any large quantity of boost due to the insane amount of heat that they generate.
Cost to run a Cog'd F class w/ sheetmetal cooler... Plan on spending 5-6K for the blower components alone. Plus the cost of fuel and ignition components to compensate.
I've got the blower turning as slowly as I can 48,000 and am still seeing 15-16# on the dyno and 19# with a load in 1-2 gear. The blower is far from being in it's efficiency range... Max speed is 70,000rpm/38#'s of boost. I am shutting down when the blower is just starting to become efficient
Fuel enrichment: I modified an Aeromotive 1:1 boost sensative regulator. I had to modify it due to the fact that the boost was 10# INSTANTANIOUS with any application of the throttle and the regulator could not compensate quickly enough.
My plugs look pretty consistant between each other but I am not using a stock Vic JR either. If you jet it to get an upper rpm A/F reading of 12-13, you should still be rich enough to address runner length distribution concerns and still allow for a desirable low rpm throttle response. Remember the thermodynamics of fuel evaporation, ie. a carb'd application pulls fuel through the intake and results in at least 25* cooler intake charge versus a direct port FI; Thus, you can run a leaner A/F with less retard and a decreased probability of detonation.
Fuel... I'm still running 93 octane pump gas with 2 gal Toluene per 10 gallons of pump and have 1500 miles with not one speck on any plug!
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