Husker Fan

I was wondering if i can i use a lt4 hot cam in a 89 355 tpi. Because on the summit website the hot cam they offer it says that it is not computer compatible, so do i need a cam that is computer compatible? If it is a matter of prom tuning that doesnt matter to me because i am going to be burning my own chips

oscarfromla

iTrader: (9)

Plenty of members have LT4 hot cams in TPI powered engines. This cam was made for the LT1 which is computer controlled. Don't know if the one you saw was made for carbs but I doubt it. I'm assuming by non-computer compatible, they mean the PROM just needs tuning.

resinlake

Call Summit, they have a number for tech questions like this. Could mean that it is not compatible with the stock ECU, would require tuning as the previous poster has said

3rdgenmaro

iTrader: (9)

Summit's techlines are hit and miss. Sometimes you get a smart one, other times you get an idiot.

Not computer compatible simply means that it will not work with the stock computer. It will have to have a custom tune.

Husker Fan

Thats what I thought it meant but I was not sure, Thanks guys

five7kid

iTrader: (14)

For the record, the Hot Cam with 1.6:1 rockers is also not compatible with stock Vortec heads.

squatingeagle

so is the hot cam with 1.5:1 rockers compatible?

3rdgenmaro

iTrader: (9)

not in stock form

If you change retainers, springs, and seals, the 1.5s will work for certain. Not sure yet on the 1.6s

the guides should be cut on them to allow higher lift. Especially if you have the heads off the motor.