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  • cam selection

    I have removed the 304 from my '72 and I noticed the edges of the existing cam lobes have little chips on them. I was thinking about replacing the cam anyway but I don't know what to choose. Super Scout Specialists lists several with different RPM ranges and to me this is a little confusing. I am going to install a new TBI system and a electronic ignition as well. I want to build the best system for feul economy as possible. I also thought about getting Stan's headers but the mechanic in town who works on Scouts told me not to because it chokes them.? He said he has had to take headers off of Scouts before because of this. Is that true? If so, does it have anything to do with the cam/RPM involved? Any suggestions and insight into this would be great. I'm fishing for any advise on other performance product choices you guys might have had success with. Thanks.
    Terra '79

  • #2
    Re: cam selection

    Originally posted by terra79
    I have removed the 304 from my '72 and I noticed the edges of the existing cam lobes have little chips on them. I was thinking about replacing the cam anyway but I don't know what to choose. Super Scout Specialists lists several with different RPM ranges and to me this is a little confusing. I am going to install a new TBI system and a electronic ignition as well. I want to build the best system for feul economy as possible. I also thought about getting Stan's headers but the mechanic in town who works on Scouts told me not to because it chokes them.? He said he has had to take headers off of Scouts before because of this. Is that true?
    No. Headers are meant to be more free flowing and to reduce restrictions to flow that are inherent in stock manifolds. Now that being said...your IH is a slow revving motor, Under 4,000 rpm. So will headers really help you much on a stock motor? Maybe a little. But for the $$$ I don't think it is wise investment.
    You said you wanted the best fuel economy in one sentence then the rest of the talk is about performance????????
    A basic rule of thumb for a cam is , the more duration a cam has, the more valve overlap it has. If raw fuel is going out the exhaust unburned then what is your mileage doing? Also the more duration your cam has, the less bottom end power your motor has. If your IH is a low rpm motor and you kill the bottom end with a big cam then what is left?
    So what do you really want for your Terra?
    If you want mileage then I would stick with a stock cam or 1 selection over stock(RV) with the TBI.
    If you want looks and performance then go with a cam around 268-270 duration with headers, BBC valve springs, Shaved and ported heads and a 2 in TBI.
    Or go with a 392!!!!
    HTH

    If so, does it have anything to do with the cam/RPM involved? Any suggestions and insight into this would be great. I'm fishing for any advise on other performance product choices you guys might have had success with. Thanks.
    Terra '79
    Bill USN-1

    COMMITED TO TEACHING PEOPLE THE "PROPER" WAY TO EFI
    HAMILTON FUEL INJECTION
    May be the answer to all your fuel injection needs!
    Learn to do it right.

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