I am considering a larger pulley as soon as the predator is released.
Would it be better to go with a 5 lber and a very safe tune or a 3 lber and a more radical tune.
Also if I go with the 5 lber I was thinking of having the shift points and the rev limit lowered quite a bit to not over spin the s.c.
Any suggestions on what a good safe r.p.m. limit would be.

Thanks

 

I run a 4#'lber ; no chip.

A 'radical tune' usually leads to a potentially lean condition- NOT worth it. Rather sacrifice 20-30 hp with a really safe tune than a blown motor.
Also- 'radical tune' should only be done on a dyno with an experienced tuner...
my 2 cents...
Lower the shift points is something most will not talk about; but something I plan to do. Our torque curve changes a lot when adding boost. A for lowring the shift points... you've been doing your homework.
Read this : http://www.timskelton.com
john

 

I have ran a 2lb and 5 lb without a chip on my 01 with no problems. A/F on the dyno at wot is 12/1. I generally run the 5lb all the time any more. I also have a chip but only run it at the races, it shifts at 5,250.

 

Thanks Guys
Tim Skeltons site was very informative, thanks P.Wheels

 

5lber........