This will be a long post so here it is up front...SORRY!!

Now that's over let's get down to business, shall we? I decided to go the forced induction route and chose ATI. Currently my N/A configuration is this...

383 stroker 4 bolt main w/Eagle fully forged rotating assembly and Mahle forged pistons.

AFR 195 street heads with a COMP cams hydraulic roller retrofit 12-433-8 cam (specs .520/.540 lift 236/242 duration 110 LSA 106 IC) an Edelbrock Performer RPM Air Gap manifold and Holley 4150 Street HP 4 barrel 750 CFM double pumper.

Engine made 420HP/430TQ @ the wheels so roughly 510HP/520TQ at the crank.

I called up ATI and told them my current configuration and what my plans were. They told me that I should make about 750HP-800HP at 12-14 PSI of intercooled boost with a D1SC. I was like

I called AFR and told them what ATI said and they agreed that the heads should support 800HP without porting/modifications minus changing over the springs to achieve higher seat pressures. I guess to reduce the possibility of boost induced valve float?

I called COMP and they recommended changing the cam out to one of their Nitrous HP cams 12-419-8. Lift is the same but exhaust duration increased to 248 degrees with 113 LSA and 108 IC.

I know that I will need a blow thru style carb and so far I found 2 of them...Quick Fuel Q-Series 850 CFM (Q-850-BAN) and a Mighty Demon 850 CFM (5563020BT) I understand the concept that bigger is not always better, but will 850 CFM suffice for this power level? If not, I would assume that 1000CFM would do the trick?

ATI stressed to me that a blow thru supercharged application demands more fuel than an N/A engine does with a similar power level. They recommended an Aeromotive A1000 and the specs on the site show that pump capable of handling 1200 HP for a carbureted, supercharged application. I am not sure, but this seems overkill to me

I have been through several fuel system configurations with this car and I have not found anything that I am satisfied with. I currently am running an Aeromotive 11213 pump with these specs...

11213 - SS Fuel Pump - ORB-08SKU: 11213
A carbureted fuel pump that allows you to step up your performance by maintaining optimal line pressure and delivering high volume. The Street/Strip Pump was engineered for 200-750 HP carbureted engines making this a perfect choice for a daily driver, street rod or demanding ET-bracket race car.

• P/N 11213 features ORB-08 inlet and outlet ports.
• Perfect for use with either a Bypass Regulator (P/N 13301) or one of our Carbureted Adjustable Regulators. (P/N 13201, 13205).
• Fuel flow exceeds 140 GPH at 13.5 volts.
• Pump provides 14 PSI fuel pressure – perfect for cars that leave hard.
• Pumping mechanism features our proprietary composite rotor, stainless steel vanes and precision ground, heat treated steel plates.
• Ideal for dedicated nitrous delivery.
• Alcohol compatible.
• Low current draw. (under 5 amps)

ATI told me that the above pump will not supply enough fuel for what I am looking to do. Right now the above pump is mounted externally and this thing is loud. I imagine that the A1000 will be louder. I would prefer to have the fuel pump internally mounted, but by the looks of it I don't think that an A1000 would even fit in the opening at the top of the stock tank. I have heard of many people using twin 255LPH Walbro's in the stock tank and running ungodly RWHP numbers. I just don't know if this will work for me. I am looking for something reliable, that will supply enough fuel for (a maximum of) 800HP, be relatively quiet(er) than what I have now, and hopefully fit in the stock tank.

Also, on a side note, would I be better off keeping the RPM Air Gap dual plane or swapping over to a single plane? I am leaning towards keeping the Air Gap due to the fact that the car will still be street driven, but if someone presents a good enough argument I may be swayed

I am done rambling now. Thanks for taking to the time to read this. I am looking forward to seeing your thoughts and suggestions!

 

Sounds like a nice solid setup, I agree,your current fuel pump will NOT support the power and boost you are looking at...As your pump only puts out 14 lbs pressure. With a blow thru, you have to have a pump that will maintain base pressure and rise on a 1:1 ratio under boost with a boost referenced regulator to provide the fuel that the engine will consume. So, your base fuel pressure will usually be set around 7 lbs and if you are going to pump 12-14 lbs. of boost, you would need a pump that puts out 19-21 lbs of pressure to maintain enough fuel volume, 7lbs.fuel pressure + 14 lbs. boost = 21 lbs. pressure,plus you want a good safety margin on top of that, that is why an EFI pump like the A1000 is an excellent pump, because it flows a ton of fuel volume even at 45 lbs of pressure, it will flow even a ton more at only 21 lbs of pressure. If you are gonna make an honest 800hp, I would also recommend the Aeromotive A1000 pump along with the Aeromotive 13204 boost referenced regulator with a -10an feed line and -8an return, (NO Smaller) Blow thru setups require a lot of fuel volume to work flawlessly. The A1000 is pretty noisy, so if at all possible, in tank mounting would be best. If you were only gonna make 650hp or so, I would recommend the Aeromotive 340 stealth pump, as it is an in tank mounted stock replacement pump, but I would not use it at your power level.

For the blow thru carb,my choice would be to either give Kevin at CSU a shout, or Rodger at C&S, they both build excellent blow thru carbs.

For the camshaft, I would get it perfect the first try, and all that takes is contacting Mr. Steve Morris at www.stevemorrisengines.com , he is very well known for his knowledge with blow thru Procharger camshaft technology, he knows how to make huge power with his camshaft designs, and will be easy on valvetrain and reliable for street driving.They are pricey, but trust me on this one,I have had personal experience with them, and they are WAY worth it. Our car back when it had a 383 with AFR 227 heads and an F1R Procharger ran 6.30's in the 1/8 with a custom Comp Solid Roller that we ordered direct from Comp, a grind they recommended. We later switched it out for a custom Steve Morris grind that we ordered through him, and it too came from Comp, (he uses Comp and Bullet cams to grind his profiles to his specs), the camshaft is the only change we made, and it ran 5.89 in the 1/8. That's a gain of 4 tenths in the 1/8!! A huge difference in power!! We were sold right then and there, pricey or not..... In the end they are worth it imo.

For the intake, at that power level, definitely go with a Victor Jr. single plane if pumping over 10 lbs of boost.... The more boost you pump, the bigger the fuel distribution problems can become, and the better off you are with the single plane. The RPM Air-Gap I believe work great in low boost street combinations up to 8-10 lbs.

Hope this helps!!

Brian

 

Thanks for the reply! I will have to check out those carb companies and see exactly what they can recommend for my application.

 

Your welcome....anytime!!

 

a nice 750 cfm blow thru will do the trick . i bought mine from kevin at CSU and it works mint. Also will support up to 1100 hp.

 

Call Kevin at CSU he set my carb up that worked great out of the box and has great customer service.