I bought the Edelbrock heads from Indy and had them set up for the cam then. I paid extra to get 2.19/1.88 valves and 10* retainers and locks but not sure of the quality they used. One thing is I didn’t get the 1.88 exhaust valves. Like I said I lost the cam card since so I no longer have that info. From what I recall it was 2.14,[email protected] with 587 lift. I thought it had the same duration specs as a stock six pack.
35 minutes away cruising at 70 mph at 3000 rpm. I was just making a shake down run at the track and planned on rechecking everything at home. I just got done putting the heads on and swapping the gear drive with a comp cams chain set. I checked the oil pump because it had some scratches so I changed it also. I also pulled the pan and checked the bearings. Everything checked good.
Yes on the lash cap. I checked for any signs of contact on the guide or retainer. None of the others show anything either. There were 3 or 4 others cracked on one side that hadn’t failed completely yet.
No coil bind also. I checked all the basics when I disassembled and inspected it. I didn’t find any clearance issues with the set up.
No, cracked retainers on both sides. I was a master tech for 15 years but not a pro at setting up the geometry. I did check the sweep and center position side to side. Looked ok from the research I did on the subject. I do know my way around a Mopar just looking for opinions from the experts. Just thinking metal fatigue. I changed to titanium retainers.
I don’t recall the exact clearance numbers but I do recall I had enough clearance for up to 675 lift, which is way more than I have. As far rpms at the track usually shifted at 5500 with a chip at 6000 but this last trip to the track I shifted at 5000. I plan on rechecking geometry when I go back together this time. I didn’t see any guide wear that would point to geometry off that much.
The one that broke completely was an intake valve and from the picture it looks like it also was an intake valve.
No sign of contact on the pistons except when the retainer let go.
I’ve never seen or heard of one before. I think I just didn’t tighten the bolts down evenly in my rush to get it back together.
Still need to deal with the retainer issue.
I never found a cause for that issue but I was told by Iq52 that they didn’t look like any type that he was familiar with and definitely not a Chromemoly piece. I’m thinking a Chinese part that wasn’t up to par for the app. I bought them from Indy back when they first were available so I think they bought bare castings from Edelbrock and put Chinese parts in to raise their profit margin. No other explanation.
Thanks, I have been on the 3b page that talks about geometry and what to look for in a good set up. I will revisit it when the time comes.
