I notice that when i get above 6000 rpm that my boost drops to about 9 or 10 versus 12. Why is it doing this. Isnt a 3.10 to big to be slippin? thanks
Is belt slippage possible with a 3.10 pulley?
- Thread starter 03cobracoupe
- Start date
What other mods do you have?
Bassani exhaust, Bassani catted x-pipe. UPR CAI. Diablo chip
That's what I thought too. Are you running the correct size belt and what kind is it? Who made the pulley?
Re: Re: Is belt slippage possible with a 3.10 pulley?
Yes i have the right belt And amazon racing made it
Yes i have the right belt And amazon racing made it
Powdered belt residue around the top pulley and loss of boost up top I believe.
and it cant be boost bypass cause rick said he controls that with his chip.
Check the belt for shinnyness. (Another sign of slip) What size belt is it anyway?? Rick usually sells Napa's (Which are made by Gates)
Less pressure is not always less power. The goal is mass transfer. That is, moving as much air into the cylinder as possible.
There are other factors that lead to loss of boost at higher rpms and they may be unavoidable:
1) increased viscous losses and charge heating affect the compressiblity of the supercharged air -- hot air compresses differently.
2) cylinder filling/scavaging events are dynamic and change their behavior as your climb the rpm range -- more unburnt fuel is going out the exhaust, not a bad prospect actually.
I suspect that the next phase in modifications will be a revised camshaft pattern. The exhaust profile & timing is especially lame.
In short high rpm boost loss is nearly unavoidable until you move to the "next step", which will require opening up the engine --and your wallet.
Just of offer a data point, I have a 3.2" pully with dusting on the pully shroud.
If you are really having trouble sleeping at night you can PM me for a dissertation on fluid dynamics....
-Jon
There are other factors that lead to loss of boost at higher rpms and they may be unavoidable:
1) increased viscous losses and charge heating affect the compressiblity of the supercharged air -- hot air compresses differently.
2) cylinder filling/scavaging events are dynamic and change their behavior as your climb the rpm range -- more unburnt fuel is going out the exhaust, not a bad prospect actually.
I suspect that the next phase in modifications will be a revised camshaft pattern. The exhaust profile & timing is especially lame.
In short high rpm boost loss is nearly unavoidable until you move to the "next step", which will require opening up the engine --and your wallet.
Just of offer a data point, I have a 3.2" pully with dusting on the pully shroud.
If you are really having trouble sleeping at night you can PM me for a dissertation on fluid dynamics....
-Jon
matt lankford
all is sold
you can get slip even with the stock pulley. if you go to a carwash with the pulley guard off and the hood mod cut out you can get a soapy belt that will slip too
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