need cam choice help
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need cam choice help
i have a 1991 f150 5.0 speed denisty motor and need help in finding a mild to choppy idle cam or the best proformance cam i can use with out having issues with computer and tuning being messed up and also how do i know if its roller or not
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The 91 will be flat tappet , if you want to go to a roller cam you need to find a 302 HO , or a 94 + truck motor , you can get the spider retainer , dog bones , roller lifters , out of one of those . The HO cam with 1.7 rockers with work with SD , you would also need the distributor or the steel gear for the roller cam , or just stay flat tappet , i like roller cams....Lew
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Forgetaboutit.. a cam that produces a choppy idle and speed density are not compatable. There are several upgrade cam options for these trucks but they will all produce a smooth stock like idle. The cheapest option for you is the Comp cams 31-255-5 flat tappet cam and lifter kit, your motor should be roller ready so you could potentially swap in a roller cam but the cam alone will cost double what the flat tappet kit does and you still have to buy roller lifters, pushrods, and the spider and dogbones retainer assembly.
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Yep.. they started appearing in the '92 model year in the 5.0 but not until '94 in the 5.8.
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might be a stupid question but how do you tell if you have a roller cam or a flat cam? I have a 92 and was going to look into cams for it but know im not sure what i have.
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FTE Legend
Joined: Jun 2006
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From: Ottawa, Ontario
You will have to pull the drivers side valve cover off and put a light down the front pushrod hole, if you see a dogbone around the lifter you have a roller cam. See pic below, the dogones are the fork looking things around the lifter body.
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