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Search: Posts Made By: 25stevem
Forum: Pontiac - Race 03-29-2023, 11:47 AM
Replies: 27
Views: 3,543
Posted By 25stevem
I would be very concerned with trying to doing...

I would be very concerned with trying to doing any sort of home honing work to size the bushing when running roller lifters and there need to be perpendicular to the Cam.
Forum: Pontiac - Race 03-27-2023, 07:20 PM
Replies: 27
Views: 3,543
Posted By 25stevem
So the RAV block and the early 389 motors have...

So the RAV block and the early 389 motors have this rib in the crankcase on the passenger side, does the SD455 have that rib also?
Forum: Pontiac - Race 03-27-2023, 07:08 PM
Replies: 27
Views: 3,543
Posted By 25stevem
I might be more of the opinion that these...

I might be more of the opinion that these vertical rib reinforcements where done to help keep the block from splitting up through the mains like Arnie and Jess Tyree and others where experiencing....
Forum: Pontiac - Race 03-27-2023, 07:23 AM
Replies: 27
Views: 3,543
Posted By 25stevem
Yup, I know, but still how much meat was taken...

Yup, I know, but still how much meat was taken out of the bores to get the sleeves in?
The factory engineers never dreamed that open spring pressures could be used that would need to top 600 psi.
I...
Forum: Pontiac - Race 03-27-2023, 05:50 AM
Replies: 27
Views: 3,543
Posted By 25stevem
I would be very concerned with the high levels of...

I would be very concerned with the high levels of side loading that roller lifters place on the the stock passenger side lifter bank in terms of there thickness no less with then now being thinner...
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