Well like you said this is a very subjective question but I can give you some numbers that may help a little.
First off in the Procharger bracket the biggest pulley you can run is about a 4.75" pulley with no modification. You can run bigger but you have to start machining the shoulders off the pulley down.
So lets say you decided to run an Innovators West 8" over driven balancer on this 427ci motor. This combination would run the blower RPM at 63K at 7000 engine RPM.
The F1-A has a redline of 72K, so spinning the blower to 63K on a "good" flowing 427ci would net you in the range of 13-17psi of boost.
I know that is quite a bit of range for boost but unfortunately their are so many factors to take into consideration that's about as close as I can get.
Why an F1A and why minimal boost? What are the longer term goals?
Well, the car is a real street car, and is driven on long trips. So I'm worried that there is such a thing as too much power when running a tire like the PS2 ZP. Also on trips it has to be tuned for 91 octane, with some slack, and has to be controllable in the rain. Locally, or for things like trips to a standing mile event, I could run a much stickier tire.
So the idea was to be able to change between roughly 700 at low boost to considerably more at high boost via a pulley and tuning change.
Basically I have a choice between a D-1SC, which could be set up for 700 or so easily, and maybe do 825 maxed out, and an F-1A, which would do maybe 950 or better maxed out...but can it do the 700?
Another way to look at it is that the output of the F-1A with the very largest pulley is about the same as the D-1SC pullied for redline. I'm afraid that the F-1A, even with the largest pulley, might put out more power than I want for my "low power" scenario. Hence this thread.
The shortblock and fuel system will be set up the same way either way (right the first time), so the only real questions are whether I can tone down the F1 enough, and whether I want to listen to it. If there are other considerations between the two I am missing, please speak up.
Basically I have a choice between a D-1SC, which could be set up for 700 or so easily, and maybe do 825 maxed out, and an F-1A, which would do maybe 950 or better maxed out...but can it do the 700?
I have the F1A on a 427 and with just 10 psi I'm at 757 RWHP and I drive that car everwhere. I took it to Connecticut and back to Florida last year for a 2,500+ mile trip with no worries. I would make sure you upgrade to the 8 ribbed system along with Andy's bracket.
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2005 Forged LS-7, Stage 3 heads, F1A Procharger, 8 Ribbed System, LEVEL 5 trans from RPM, 3200 Stall, Dynatech Headers, Magnaflows, Trans Cooler, Oil Cooler, DeWitts Radiator, DTE 3.42 Gears, Z-06 Rear Wide Body Kit, CCW SP500 Rims, Hoosier 345's, Z-06 Calipers and Rotors, Z-06 Sway Bars, LG World Challenge Hood, Lingenfelter Rollbar
DRIVEN WITH HAND CONTROLS !!!
I have the F1A on a 427 and with just 10 psi I'm at 757 RWHP and I drive that car everwhere. I took it to Connecticut and back to Florida last year for a 2,500+ mile trip with no worries. I would make sure you upgrade to the 8 ribbed system along with Andy's bracket.
That's great feedback, thanks. What pulley sizes are you running?
Well, the car is a real street car, and is driven on long trips. So I'm worried that there is such a thing as too much power when running a tire like the PS2 ZP. Also on trips it has to be tuned for 91 octane, with some slack, and has to be controllable in the rain. Locally, or for things like trips to a standing mile event, I could run a much stickier tire.
So the idea was to be able to change between roughly 700 at low boost to considerably more at high boost via a pulley and tuning change.
Basically I have a choice between a D-1SC, which could be set up for 700 or so easily, and maybe do 825 maxed out, and an F-1A, which would do maybe 950 or better maxed out...but can it do the 700?
Another way to look at it is that the output of the F-1A with the very largest pulley is about the same as the D-1SC pullied for redline. I'm afraid that the F-1A, even with the largest pulley, might put out more power than I want for my "low power" scenario. Hence this thread.
The shortblock and fuel system will be set up the same way either way (right the first time), so the only real questions are whether I can tone down the F1 enough, and whether I want to listen to it. If there are other considerations between the two I am missing, please speak up.
I would do an F1C. Keep the six rib damper and run a big pulley 4.5 or 4.75. You should be in the 10# range and have headroom to make 900hp when the time comes.
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Least boost with ProCharger F-1A?
