Quote:
Originally Posted by mgarblik
Agree with John on all his posts here. We had various harmonic/parts failure issues in our N20 engine before we went to the biggest/best pushrods we could fit in. On the Nitrous car that was 7/16" intake double taper and 1/2" exhaust. On the nitro engine, 1/2" on both. All Manton, max wall thickness, series 5. Yes, they are heavy. As John mentioned, on the lifter side, doesn't matter as much as valve train chaos. Did the push rods cause the lobe issue? can't really say, but big push rods are never bad. That camshaft can likely be fixed.
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Where can I get a set of these push rods? Was it a lot of work to get a 1/2 p-rod to fit?
Thanks