Quote:
Originally Posted by vicgto
I had an interesting conversation with Scott form Butler Performance who I ended up purchasing from. I don't know the accuracy of his statements but he said Crower, Harland Sharp, Scorpian and most other US made rockers are bigger than the advertised ratio (e.g. 1.65 is actually closer to 1.7). He said he was told by one of the manufactures this is done to overcome losses due to flexing of components during operation so you end up with advertised ratio, not sure how true it is but that's what he said. He also said the off shore stuff (e.g. PRW) are much closer to advertised ratio.
Anyway I hope I don't get anymore surprises with these rockers.
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Yes that is what i have heard too, David vizard and also Eric Weingartner has video's on this subject. Eric also demonstartes the overshoot on Ratio on one of his motors without spring pressure and with full spring pressure. and you can see what the actual ratio is. As for me i have been running Scorpion 1.5 ratio rockers for about 10 years now, first on a ramair 4 cam (edelbrock flat tappet) and now on a comp roller and no issues this far.
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-469 ,Butler 310+ Eheads, Hurricane intake portmatched by butler, Butler roller 230/236 @0.50 112 LSA, Johnson lifters, pypes 2 1/2" exhaust, 3.42 yukon duragrip lsd, holley sniper efi, hyperfuel efi tank +++
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