I have a Super M with IH fire craters (4.125") and the super m gas head pulling 57hp on the dyno and I have yet to touch the craburetor with my very special carburetor tools... number drills. The question I have is that my brother has a 450 that runs awesome but when we stuck it ont he dyno it only has about 47 hp. We usually tune these on the dyno. The question I have is that i have seen this type of thing before and I am starting to wonder how worn a distributor is and little things like the springs that advance the timing affect operation. Now I know I need to at least clean out the 400 carb because a small amount of varnish could plug it ever so slightly and make a huge difference. But I am wondering what experiences other people have had with this?
- Thread starter LarryM
- Start date
Janicholson
Well-known Member
Every thing you mentioned is important. A 450 cam, and carb would also make a difference. As would putting a bit of advance and premium fuel in it.
Accurate timing is a must. Worn distributor shafts are common. Less than .001" clearance is mandatory on the shaft. Good advance mechanism is also important. JimN
Accurate timing is a must. Worn distributor shafts are common. Less than .001" clearance is mandatory on the shaft. Good advance mechanism is also important. JimN
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