"KV" wrote: > Does anyone know of a trailer-towing (torque) cam that is ok > to use in this > engine and still be compatible with the original ECM? > It is a two bolt-main block and is being bored .040 over, and > is out of my > 91 GMC C1500. I tow a 30' Jayco 4 or 5 times a year. > Thanks in advance. > Kevin
Personally I would focus less on a cam and more on gear ratio as that is what makes or breaks a tow vehical. If you are running stock tires, you want 4.10 gears for that sized trailer and if you are running over stock tires size, try a 4.56 and you will not be disapionted in the towing improvements. ONe more comment if I may, the factory 10 bolt is not the strong of a rear axle and would no be my first choice for towing that much weight a lot wear wise. If you plan to keep the vehical for a while you should consider finding a 9.5 inch 14 bolt semi floting rear axle that they used in LD 3/4 ton trucks of that body style. Same hub lug pattern and a much stronger axle that will handle that towing with little effort. I have a 2005 Z71 loner will my truck is in for ABS warranty work. It has a 310hp 5.3 with 3.42 gears and the sticker even say HD towing package too. It is a DOG in OD and not to much better in 3rd at speed. I can only imagine how bad it would suck towing with those gears too.