Quote:
Originally Posted by USMC302
The solution was the right LENGTH head studs,
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Werent you having problems with it before you switched to the studs? Maybe I missed something.
Part of the reason I am so adamant on only torquing to 70 ft lbs is the amount of distortion you get in the cylinder. I have seen this firsthand when I have had a block in the hone. I will bore a block without the torqueplate to about .005 under the finished size. Then when I bolt the plate on and start to hone it, I can see the 'wear patttern' for the first couple thou. Finally when its all done, the cylinder will be near perfectly round and straight. If someone takes this block and torques the head bolts to 90, they are going to over-distort the cylinder and lose ring seal, and power. Possibly lots of it.
The heavy duty blocks like the Dart dont twist up near as much. The 351w with its 95 ft lb 1/2 inch head bolts is one of the worst. Its basically a bigger version of the tin can 302. Simply bolting a water pump on a SBC will change the front cylinders 3-4 tenths.
Glad to hear you got it running though. Problems like that really suck.
Andy