I'm building from scratch. I've got plenty of 1-3/4" Harley exhaust pipes. The exhaust that was on the truck was cobbled together and the head pipe had a huge hammer ding in it to clear the oil pan rail. A "standard" slant 6 head pipe won't work because my truck has the low mount starter.If you are replacing the pipe, that is a good size, and if you are just wanting to make sure there is enough restriction and proper flow, remember the rule, the exhaust system is only as large as its smallest diameter/cross section of pipe. So, if the pipe itself that is on there, for example, is 2 inches, putting an adapter and muffler of 1 3/4 inch diameter will be the final overall flow of the exhaust system. It goes the other way, too, a larger 2 inch muffler and end pipe on a 1 3/4 inchhead pipe is not going to help at all.
Smaller valves, smaller lift on the cam, all around a 225 will never put out the exhaust capability of a 440, or half a 440. 1.75 inch will be large enough for a slant six all day long.Who would straddle a 440 with a smaller Twin exhaust than 2 inch?
2/ 225=450 cui....
I dont Think your right....it was Rick Ehrenberg that put the equation in my head once but i cant find the articleSmaller valves, smaller lift on the cam, all around a 225 will never put out the exhaust capability of a 440, or half a 440. 1.75 inch will be large enough for a slant six all day long.
As far as I know, 2.25 was stock for 44os.
You do realize that anything slant 6 related that Doug Dutra has anything to do with is "high performance", right?
I see no reason why not. Needless to say: match up both starters very carefully; especially the nose dimensions as well as the number of teeth, etc. Why I say that is apparently some of the Canadian Slant Sixes used a different starter than our USA vehicles till about 1967, 'our' Slants used the same starter as the V8's. I know for a fact that a 1988-03 5.2L/5.9L ND Mopar starter bolts right up to a 1966 318 Poly.Another question. Will a gear reduction starter fit in place of the direct drive low mount starter?
Its only partly true that the weakest part makes all the pressure, its actually the sum of all pressure fall thatThe exhaust manifold outlet is only 1.980"dia., so 2"dia. pipe is the maximum that would possibly be of any benefit.