Procharger Help
Thread Starter
Staging Lane
Joined: May 2005
Posts: 80
Likes: 0
From: michigan
Procharger Help Procharger Newbie Need Guidance
Currently in the process of installing an F1 Procharger in my 68 Firebird. I'll be running a 357Ci chevy. My goal is about 800hp.. My whole motor is built to the tilt, forged everything. Block has been reinforced w/ ARP studs as well as aftermarket main caps.The specs are as follows; Canfield 200cc alum. heads , Howards custom cam; 112 center lobe, 240-250 duration, 580-600 lift. My compression ratio is about 7.9.1 using those cometic head gaskets, which are crazy expensive by the way! I also just received my custom 950 blow thru carburetor from "The Carb Shop" which they claim is 95% right on *as far as tuning goes. My fuel system includes Aeromotive A1000 fuel pump and Aeromotive bypass regulator, 1/2 fuel line, 3/8 return. Im hoping to inter-cool it soon but $1500 isn't chump change! My pulley is 15lb 12rib, Im trying to find out from other experienced people how much boost can be run w/ 93 octane fuel and 7:9:1 comp ratio.. Representatives at ATI tell me 15 lbs non-intercooled will be fine, but in my opinion they don't really sound like they put a whole lot of thought into what they say. Im looking into a msd btm, but some perople tell me im going to need a digial 7+??. I purchased a fuel and boost guage but am undecided when it comes to an air/fuel guage. What should be used for tuning? Any guesses to what kind of times ill be running 1/4 mile? I have TH350, 9inch 4400stall converter, 4:10 gears & 12 bolt rear end.
Any advice would be greatly appreciated.
Currently in the process of installing an F1 Procharger in my 68 Firebird. I'll be running a 357Ci chevy. My goal is about 800hp.. My whole motor is built to the tilt, forged everything. Block has been reinforced w/ ARP studs as well as aftermarket main caps.The specs are as follows; Canfield 200cc alum. heads , Howards custom cam; 112 center lobe, 240-250 duration, 580-600 lift. My compression ratio is about 7.9.1 using those cometic head gaskets, which are crazy expensive by the way! I also just received my custom 950 blow thru carburetor from "The Carb Shop" which they claim is 95% right on *as far as tuning goes. My fuel system includes Aeromotive A1000 fuel pump and Aeromotive bypass regulator, 1/2 fuel line, 3/8 return. Im hoping to inter-cool it soon but $1500 isn't chump change! My pulley is 15lb 12rib, Im trying to find out from other experienced people how much boost can be run w/ 93 octane fuel and 7:9:1 comp ratio.. Representatives at ATI tell me 15 lbs non-intercooled will be fine, but in my opinion they don't really sound like they put a whole lot of thought into what they say. Im looking into a msd btm, but some perople tell me im going to need a digial 7+??. I purchased a fuel and boost guage but am undecided when it comes to an air/fuel guage. What should be used for tuning? Any guesses to what kind of times ill be running 1/4 mile? I have TH350, 9inch 4400stall converter, 4:10 gears & 12 bolt rear end.
Any advice would be greatly appreciated.
TECH Senior Member
Joined: Nov 2001
Posts: 11,603
Likes: 0
From: Chi-Town, IL
I think you could get away with 14-15 psi on pump gas if the Air Fuel ratio is around 11:1 on the street....I'm not sure what you would use to tune the car, I'm not too familar with these types of setups, but I ran an F1 procharger on my 370c.i. motor I had in my firehawk, I ran 15psi with 100 octane....9:1 compression motor, 11:1 AFR
15lbs non-intercooled hmmmm.... I would measure the IAT at the end of the run and see how it looks. If its above 200F i would really try getting some sort of cooling method such as intercooler or alky injection. Your C/R with a cool IAT should be good for more than 15lbs. I bet you can max that F1 on your motor if u took care of the IAT and kept it in check. If u kept your IAT around 120-140F then i would run 20psi no problems with that C/R. Just keep an eye on knock. Good luck.
Originally Posted by BlownBird68
IAT ?? im guess internal air temp??? Any help w/ tuning? How do i set the A/F to 11:1??? Im wanting to run pump gas *93octane
Intake Air Temp= IAT. Run really low timing with high 10's AF for base line runs and monitor your IAT and knock as i said before. If you saw high IAT and some knock then that means u need some sort of cooling methods such as intercooler or alky injection if u dont want to buy an intercooler.
Helping tune a friends car with a 540 ci with F-2 cog drive with methanol cooling. Running 114 octane cam 2, changing pullies now, boost was in excess of 30#. He is running 8:1 JE pistons, Carrillo rods and a Bryant crank. MSD btm will be fine for your application. I believe his carb is identical to yours. What jets are you running? Make sure you have enough height between carb throttle plate and bottom floor of intake manifold. Remember that these carbs are no different than any other carb, they also work off intake vacuum. Boost reflection off floor of intake really screws up performance.
