F1A & 346 Questions
Thread Starter
Joined: Apr 2002
Posts: 5,231
Likes: 20
From: Houston TX
F1A & 346 Questions I finished my build on my FRC recently and was wondering if my numbers seem about right or if I should pulley down the blower to get the max impeller speed up closer to what the blower can support.
List of mods
iron block 5.7 forged internals 10.5:1 compression
AFR 205 / ls6 intake and stock tb
arun jam cam
kooks 2" headers / 3" xpipe which drops down to 2.5" at axleback
fic1300 injectors/ dual walbro 450 pumps / E85
8" innovators west balancer
4.25" blower pulley
procharger f1a
Car made right at 800hp on 19lbs. I was thinking I could get closer to 850-900. Just wondering if I should swap pulley to either a 4" or I think the other size was a 3.90.
List of mods
iron block 5.7 forged internals 10.5:1 compression
AFR 205 / ls6 intake and stock tb
arun jam cam
kooks 2" headers / 3" xpipe which drops down to 2.5" at axleback
fic1300 injectors/ dual walbro 450 pumps / E85
8" innovators west balancer
4.25" blower pulley
procharger f1a
Car made right at 800hp on 19lbs. I was thinking I could get closer to 850-900. Just wondering if I should swap pulley to either a 4" or I think the other size was a 3.90.
Those are really good numbers! You have to try both sizes so buy both, run them to see how much it makes then sell the one that doesn't work, they sell pretty quick.
Nice numbers. Wish we could see the TQ curve.
8" crank pulley with 3.9 SC pulley @ 6,500 engine RPM = 72,005 RPM impeller speed.
74,000 is the recommended max.... so you are good to go on that side.
Belt slip may become an issue ?? but the F1A can support the RPM if that is your concern.
Love that Jam Cam !
8" crank pulley with 3.9 SC pulley @ 6,500 engine RPM = 72,005 RPM impeller speed.
74,000 is the recommended max.... so you are good to go on that side.
Belt slip may become an issue ?? but the F1A can support the RPM if that is your concern.
Love that Jam Cam !
Thread Starter
Joined: Apr 2002
Posts: 5,231
Likes: 20
From: Houston TX
Yeah i probably will.
Nice numbers. Wish we could see the TQ curve.
8" crank pulley with 3.9 SC pulley @ 6,500 engine RPM = 72,005 RPM impeller speed.
74,000 is the recommended max.... so you are good to go on that side.
Belt slip may become an issue ?? but the F1A can support the RPM if that is your concern.
Love that Jam Cam !
8" crank pulley with 3.9 SC pulley @ 6,500 engine RPM = 72,005 RPM impeller speed.
74,000 is the recommended max.... so you are good to go on that side.
Belt slip may become an issue ?? but the F1A can support the RPM if that is your concern.
Love that Jam Cam !
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Verdad Gallardo It’s built and on e85 I wouldn’t worry about anything. Hell mine isn’t built and I pump 18psi through it and plan to pulley down again. If the tune and octane is on point let it eat.