Social > Your Builds / Photo Gallery
Glenn's dragster thread
ricardo1967:
Glenn,
I'm not pointing fingers or intending to be a smart aleck, but aren't the crank and bearings too short lived?
What lube oil was used? Was the oil diluting bad? How often was changed? What's system pressure?
Can the Pontiac go roller (cam)?
wideopen231:
If all bottoms are beaten out on mains and the top of rods you have some strong detonation going on.Either lean or to much timing especaily as soft as you are running blower.JMO From coloring I would say you got lucky.Looks like some heat on cpl of them.
As for tear down every 50 runs.IT COST NOTHING TO WORK on car was one of Alan Starr's favorite sayings. Cutting filter open or oberge is amust if not already doing so.
I always mic bearings new and when pulled down look back at numbers.If more than cpl thou I look for why.
ricardo1967:
But I'd expect that detonation at this level to at least crack plug's porcelains, right?
GlennLever:
--- Quote from: ricardo1967 on January 07, 2014, 03:58:28 PM ---Glenn,
I'm not pointing fingers or intending to be a smart aleck, but aren't the crank and bearings too short lived?
What lube oil was used? Was the oil diluting bad? How often was changed? What's system pressure?
Can the Pontiac go roller (cam)?
--- End quote ---
Oil was change regularly, I did not cook to remove alky, I replace the oil with new, Brad Pen 40 weight. I do have problems with contamination from alky, pressure is 65? if I remember right, I would have to go back and look at the data. I have a roller for the soon to be built aluminum block (for two season from now), I do not want to spend the money now on one.
GlennLever:
--- Quote from: wideopen231 on January 07, 2014, 06:08:23 PM ---If all bottoms are beaten out on mains and the top of rods you have some strong detonation going on.Either lean or to much timing especaily as soft as you are running blower.JMO From coloring I would say you got lucky.Looks like some heat on cpl of them.
As for tear down every 50 runs.IT COST NOTHING TO WORK on car was one of Alan Starr's favorite sayings. Cutting filter open or oberge is amust if not already doing so.
I always mic bearings new and when pulled down look back at numbers.If more than cpl thou I look for why.
--- End quote ---
Timing is 30 degrees, EGR s on all cylinders, plugs all read cold. I might suspect hydrologicaling maybe with the head gasket problems I have had (leaks). System One filter, no filter to cut open, no pieces found when cleaning.
Mic the bearings in now part of maintenance but has not been in the past.
Navigation
[0] Message Index
[#] Next page
[*] Previous page
Go to full version