View Poll Results: Which Pulley, conservative or all out
3.4" BP
1
100.00%
3.1" custom BP
0
0%
Voters: 1. You may not vote on this poll
Which pulley first?
01-31-2007, 10:41 AM
#1
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Which pulley first? This is a brand new setup, just got it running and trying to finish the interior while I wait for the dyno appointment. I need to order my pulley(s) by tomorrow to get it on time for my appointment...
Quick rundown of setup:
383 Lt1
Stock ported heads (outflow AFR 195's
)
Comp XFI 280 cam
Ported stock intake
Procharger D1-sc w/ twin intercoolers
Fuel system should handle 800fwhp as it sits, more with a bigger pump.
Now my dilemma, I really would like to have all the power I can right away. Even if it means running 100 octane unleaded. But Ive got more than a few people telling me I should not max out the blower YET...
So my choices are to go with a 3.4" pulley and get 54,867 impeller rpm out of the blower.. Or a custom 3.1 pulley and get 60,177 rpm. Both would be shifting at 6500 for now, and could easily twist the motor higher to go to maximum impeller speed.
What would you do? Be conservative at first, or go all out?
Quick rundown of setup:
383 Lt1
Stock ported heads (outflow AFR 195's
)Comp XFI 280 cam
Ported stock intake
Procharger D1-sc w/ twin intercoolers
Fuel system should handle 800fwhp as it sits, more with a bigger pump.
Now my dilemma, I really would like to have all the power I can right away. Even if it means running 100 octane unleaded. But Ive got more than a few people telling me I should not max out the blower YET...
So my choices are to go with a 3.4" pulley and get 54,867 impeller rpm out of the blower.. Or a custom 3.1 pulley and get 60,177 rpm. Both would be shifting at 6500 for now, and could easily twist the motor higher to go to maximum impeller speed.
What would you do? Be conservative at first, or go all out?
01-31-2007, 10:54 AM
#2
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Could you post the part number to your crank pulley? Most LT1 crank pulleys are 7.65" if you received it with an intercooled kit. If you have a 12 rib system then it could be 7.65 or 7.00. Post up the part number and I'll tell you what you have, unless you're positive you have a 7.00". I would get the larger crank pulley and run the 3.40" blower pulley.
With a 7.65 and 3.40 @ 6500 the impeller speed would be 59962
With a 7.00 and 3.40 @ 6500 the impeller speed would be 54867 as mentioned above.
With a 7.65 and 3.40 @ 6500 the impeller speed would be 59962
With a 7.00 and 3.40 @ 6500 the impeller speed would be 54867 as mentioned above.
01-31-2007, 12:25 PM
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I have the 7" for sure. Cant remember the part # but when I checked it against the info you gave me it was the 7"...
Anyway, Im cancelling the poll.. I called Reichard racing and they only had a 3.25 in stock. To custom machine one was gonna have me past my deadline by quite a bit.
I ordered the 3.25 and if its not enough, Ill get the 7.65 crank pulley and shift at 6400.
Anyway, Im cancelling the poll.. I called Reichard racing and they only had a 3.25 in stock. To custom machine one was gonna have me past my deadline by quite a bit.
I ordered the 3.25 and if its not enough, Ill get the 7.65 crank pulley and shift at 6400.