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Procharged 4.8 on dyno tomorrow

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Old 12-27-2012, 01:43 PM
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Originally Posted by black4.8
walbro 255 or aeromotive 340 are pretty easy swaps. either one will take you to 550+ hp. i rev mine to 6800-7000 on dyno, but w/stock cam and valve springs i wouldn't go that high. might start getting valve float. good luck on the 500 goal.
Is 6200-6400 asking to much of stock valvetrain
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Old 12-27-2012, 01:52 PM
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hell no but its the trans im worried about, those 60's are junk.
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Old 12-27-2012, 02:03 PM
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Originally Posted by idahoblkss
hell no but its the trans im worried about, those 60's are junk.
I have a vette servo and transgo shift kit going in. Hoping that will help for a bit
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Old 12-27-2012, 02:04 PM
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Originally Posted by Driver311
Is 6200-6400 asking to much of stock valvetrain
I would be worried about valve float with stock springs and boost at that RPM. Springs would be cheap insurance. I have seen many people expirence valve float at lower RPM's then that with boost on stock springs.
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Old 12-27-2012, 02:11 PM
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Originally Posted by 03sierraslt
I would be worried about valve float with stock springs and boost at that RPM. Springs would be cheap insurance. I have seen many people expirence valve float at lower RPM's then that with boost on stock springs.
what do you suggest? Its set at 5700 right now and the graph is climbing like no ones business lol. Would 6000 be a decent spot?
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Old 12-27-2012, 02:24 PM
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Originally Posted by 03sierraslt
His is a 07'
Good call, I was more or less just trying to link him to Racetronix... didn't want to post a non vendor site (if they're not a vendor)
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Old 12-27-2012, 05:38 PM
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Double the power on 10lbs. I thought it took 14.7lbs to double the power on a 100% effecient system? I have a D1SC Procharger on an built Ls6 with cam and heads, and didn't get anywhere near that effeciency. I made over 740 to the tire, but still didnt double N/A power. In any case congratulations on sick blower power.
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Old 12-27-2012, 05:44 PM
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Originally Posted by REDCYCLE13
Double the power on 10lbs. I thought it took 14.7lbs to double the power on a 100% effecient system? I have a D1SC Procharger on an built Ls6 with cam and heads, and didn't get anywhere near that effeciency. I made over 740 to the tire, but still didnt double N/A power. In any case congratulations on sick blower power.
I have always seen this to be the case also. IDK.
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Old 12-27-2012, 07:19 PM
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Originally Posted by REDCYCLE13
Double the power on 10lbs. I thought it took 14.7lbs to double the power on a 100% effecient system? I have a D1SC Procharger on an built Ls6 with cam and heads, and didn't get anywhere near that effeciency. I made over 740 to the tire, but still didnt double N/A power. In any case congratulations on sick blower power.
I totally agree, but remember I did add the blower, long tube headers and off road y pipe all at once and it is making 10psi at 5700 where we let off. Truck made 225whp uncorrected and now is 440whp uncorrected. So not quiet double and it wasnt just the blower. The blower probably added 185whp with 10psi. So yes good gains.
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Old 12-28-2012, 05:16 AM
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He's probably more near 12lbs through stock manifolds/cats.

Iirc BlownChevy was up around 150hp gain with about 10lbs through stock exhaust on his red rcsb.
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