Thread: rollback engine build

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Originally Posted by Rivithead

with o deck block, 74 cc heads, -28 dish, 0.040 gasket what would be compression ratio?

10.17:1 SCR. I doubt it would work with iron heads on pump gas. You could change to D3VE heads that have 95cc chambers that would yield 8.72:1 SCR. That build would probably work OK on regular pump gas. If I wanted to gamble on a flat tappet cam, I might use a Crane 353902, although a better bet would be to use a hydraulic roller tappet cam due to changes in lubricating oil chemistry. The oil companies don't put extreme pressure lubricants in their oils anymore, so you must add zinc and phosphorus in the form of extreme pressure lubricants with every oil change.

I see no need for any more oil pump than stock.

Call McLeod for the stick shift stuff.
http://www.mcleodracing.com/
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