LS1-450

iTrader: (33)

Want to change the serpentine belt configuration to include a 25% underdrive crank pulley, alternator (low driverside mount location), ribbed idler, water pump & tensioner. Basically, this will mean an approx. wrap angle of 90 degrees on the crank pulley. All other pulleys will have more wrap angle w/ only the water pump using the flat side (non-v side) of the belt.

Has anyone else used a minimum 90 degree wrap angle w/ a stock belt tensioner? Is it enough tension to maintain grip & 6700 RPM? If not, which sponsor sells a high tension pulley & how much more than stock tension does it create? Thank you


Please no guessers. I appreciate all comments, but only experience w/ a 90 degree minum wrap angle &/or angle to tension calculation will reveal the correct answer. The set up can work as long as the there is enough tension.

LS1-450

iTrader: (33)

For the archives, ended up adding another idler pulley & mount between the crank & alternator pullies. This creates a 110+ degree wrap angle @ the crank, of which am sure will work.

FreedS4

This sounds a lot like what I'm going to do as well.

FreedS4

Do you have any pictures of the belt installed, with the new tensioner? Thanks

Chris

joedude02

Gonna bring this back from the dead. Any updates or pictures?

HioSSilver

iTrader: (8)

I have changed my pulley/belt setup.





notice no tensioner



that us a modded mezeire street pump with no pulley on it. I've been running it like this for years. Turn it to 7k.