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3.17 pulley swap

Reillyrob

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#1
Just asking if swapping a stock pulley on my Redeye for a 3.17 pulley would require a tune? Or is a tune necessary to get the full benefit from the added boost?
 


DavidKFla

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#2
Just asking if swapping a stock pulley on my Redeye for a 3.17 pulley would require a tune? Or is a tune necessary to get the full benefit from the added boost?
Some say that you can do it without a tune. I had a lower pulley put on mine and it ran horrible which is supposed to be the same. I don't know for sure.
 


catdad

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#3
My friend has a hellcat and he put on a 3.17 pulley without a tune, has a nice dyno graph but trapped at 120mph to my 126. My charger is all stock, ran a 10.9 in the heat he was 11.3- 11.5 range
 


jonx96

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#4

DavidKFla

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#5

jonx96

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#6
There's a real change in performance and in overall engine temperatures when using 100 octane.
100 octane that's weak sauce I run 112 octane :ROFLMAO::ROFLMAO:
 


DavidKFla

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#7
100 octane that's weak sauce I run 112 octane :ROFLMAO::ROFLMAO:
Mines not tuned to within an inch of its life like yours.
 


jonx96

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#8
Mines not tuned to within an inch of its life like yours.
Hmm well I guess you didn't know that when E85 when knocks it is a lot more harmless than race fuel or pump gas
Also the e85 I run is 112 octane and not the 105 octane from the pump. I can run the same timing table on both but I just feel safer running the 112 especially when racing. On a tune I've spent 100 hours of research on.
I know exactly what is going on with the tune in my car I also know exactly what to look for in a log to know if there is an issue. Changing things based on weather.
Can you say the same? Do you log your car?
 


DavidKFla

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#9
Hmm well I guess you didn't know that when E85 when knocks it is a lot more harmless than race fuel or pump gas
Also the e85 I run is 112 octane and not the 105 octane from the pump. I can run the same timing table on both but I just feel safer running the 112 especially when racing. On a tune I've spent 100 hours of research on.
I know exactly what is going on with the tune in my car I also know exactly what to look for in a log to know if there is an issue. Changing things based on weather.
Can you say the same? Do you log your car?
I have a tuner who looks at my data and makes adjustments as needed.
I looked at E85 but it's hard to get around here and it would go bad, in a drum, before I used it all. This from my race fuel guy.
 




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