Here's something that I have been thinking over lately, and I thought that I'd share. Even though the aftermarket chips raise the shift points to 5,500+ rpms, which would make the blower rpm almost identical to a truck with a pulley, but without the chip, there should still be a benefit to installing both.

If you have your chip made with a 5,250 rpm limit and install the crank pulley, the rpms come out to exactly 14,000 rpms, which is within Eatons stated limit (Assuming that the pulley sizes are 3" and 8"). Your peak boost will be identical to the above listed "Chip only" setup, but your boost at every other RPM level will be higher, so you will be producing more horsepower over a broader curve, which is far more important than just a peak horsepower number.

 

i agree,and i dont know about sals chip but i thought mike told us the superchip doesnt raise the factory shift points.mine shifts at 5200 which is why i didnt mind changing the pully.

 

Actually, Mike did say the raised the rev limiter, it was in the "6200 Rpm" thread. Here's an excerpt from his statement:
There were guys about 3-4 months back that were saying that their trucks shifted higher than the factory level after installing the Superchip. Sal's chip does the same thing.


[This message has been edited by Typhoon (edited 02-19-2000).]