Quote:
Originally Posted by VWNate1
Higher CR , I see .
Are the valves the same size ? .
As I work my engines pretty hard and want them to last decades at the same time , I typically build them with low CR and big valves so they breathe well and run cool , you can work 'em mighty hard and they don't break , overheat , knock or diesel / ping on pump gas either .
FWIW , I'm using an original unrestored 1977 Nova GM HEI setup (the one with separate ignition coil) on my clapped out 250 CID engine and it never misses on the rare occasion I run it up to 5,000 RPM's .
The linked one looks nice and @ $60 is a steal but maybe not necessary ? .
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Pretty sure the 194-230-250-292 all used the same valve size of 1.72 intake 1.50 exhaust. Course when you take a 194 head and put bigger valves in it wouldn't matter. On a 194 head I'm pretty sure chamber relief is a must for the 1.94 valve grind. It was recommended for the 292 head. Larry aka Twisted 6 would know for sure. My old 292 in my 66 would do 5k. lol Though I would only do it for a really short time. I like that HEI. Though after some more research that isn't the exact one I have. Mine is from Speedmaster and that one is skip white. This one has a 50k coil and mine has a 65k coil. Though the difference I really don't think matters that much. Both are red anyhow. Yuck. haha