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Put the S back together with a 3.5 inch pulley and took it to the dyno. At 8,000 rpm the fuel pump took a dump. At 8,000 rpm it was putting out 368 ft lbs and 551 rwhp making 23.5 psi.
With the torque peak at 8800 rpm it would have gone to 405 ft lbs and the rwhp would have kept going up into the upper 600s (671) with 30.5 psi at the redline 9600 rpm.
Too much for the street and too much for my clutch. I changed out the pulley for 3.75 inch and now expect to see 370 ft lbs at 8800 rpm. By limiting the engine to 9000 rpm it should stay below 600 rwhp.
How did I get to the spot where I am turning it down has been asked by several owners.
The turning point was when I picked up a Vortech V7 YSi trim. It is rated to 1600 cfm and 30+ psi. Much greater efficiency
makes more power with a cooler charge load. A little frame modification and some new silicon and hose clamps helps.
The V7 YSi fits in place of the V-1, V-2 or V-3. 40% more capacity. The YSi is more efficient than the T trim.
Put the S back together with a 3.5 inch pulley and took it to the dyno. At 8,000 rpm the fuel pump took a dump. At 8,000 rpm it was putting out 368 ft lbs and 551 rwhp making 23.5 psi.
With the torque peak at 8800 rpm it would have gone to 405 ft lbs and the rwhp would have kept going up into the upper 600s (671) with 30.5 psi at the redline 9600 rpm.
Too much for the street and too much for my clutch. I changed out the pulley for 3.75 inch and now expect to see 370 ft lbs at 8800 rpm. By limiting the engine to 9000 rpm it should stay below 600 rwhp.
How did I get to the spot where I am turning it down has been asked by several owners.
The turning point was when I picked up a Vortech V7 YSi trim. It is rated to 1600 cfm and 30+ psi. Much greater efficiency
makes more power with a cooler charge load. A little frame modification and some new silicon and hose clamps helps.
The V7 YSi fits in place of the V-1, V-2 or V-3. 40% more capacity. The YSi is more efficient than the T trim.
Thanks for sharing and showing what a f20c can do with continued supercharger development/work. It looks like you have an 8 rib pulley setup. Would you mind sharing what size spacers you used on your blower bracket to make 8 ribs work? I think an 8 rib setup is the next step for me.
Thanks for sharing and showing what a f20c can do with continued supercharger development/work. It looks like you have an 8 rib pulley setup. Would you mind sharing what size spacers you used on your blower bracket to make 8 ribs work? I think an 8 rib setup is the next step for me.
0.56 inches. If you are going this route, speak with Lee at ASP.
The bottom end was built by Mike Laskey at Laskey Racing.
The head was done by Joe Alaniz.
The engine assembly and installation was done by Tony Fuchs.
Tune by Shawn Church.
12-25-2017, 06:54 AM
Supercharger with torque
