Put cam in car, pings now - Team Camaro Tech
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post #1 of 8 (permalink) Old Apr 3rd, 01, 07:29 AM Thread Starter
Join Date: Apr 1999
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The cam I put into it is a crane
part# 100082. Lift is 470 both intake and exhaust. duration 282 degree. The motor is a 327.The car starts fine and shuts of with no diesling, But when i get on it it pings and then quiets out in the higher rpms. I really dont know to much about the engine. compression is right around 150 +- 5lbs on all 8 cylinders. I think i feel domed piston,(I could be wrong on that tho).The block is a 67.I was thinking about trying octane boost to see if that would help. I need to give the wife her car back running better than it did or im in hot water. Thanks for any help.
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post #2 of 8 (permalink) Old Apr 3rd, 01, 07:38 AM
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What cam did you have in it before? If it wasn't pinging before and is now and the timing and advance curve remained the same, it sounds like you put a smaller camshaft in that boosts lower rpm cylinder pressure. Your other way out may be to have the advance curve re-done to have less total advance and come in a little slower.

Other possibilities are vacuum leak (lean condition), etc.

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post #3 of 8 (permalink) Old Apr 3rd, 01, 07:43 AM Thread Starter
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No it was not pinging it run fine.This cam is alittle racer than the last one.
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post #4 of 8 (permalink) Old Apr 3rd, 01, 08:25 AM
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start with the basics..recheck everything..timing...etc...and this may sound simple but maybe a higher octaine fuel?

even better...call the cam manufacture customer service or tech line and they are the experts...good luck....oops..dropped my beer.

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post #5 of 8 (permalink) Old Apr 3rd, 01, 08:38 AM Thread Starter
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I think i will try some higher octane gas and octane boost to see if that clears things up. Thanks
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post #6 of 8 (permalink) Old Apr 3rd, 01, 11:14 AM
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You're not a tooth off on the cam gear are you???
(sorry to even bring it up, things like this can be a be-atch)
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post #7 of 8 (permalink) Old Apr 3rd, 01, 03:47 PM
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I just wish I knew about things like this.
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post #8 of 8 (permalink) Old Apr 3rd, 01, 06:52 PM
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i bet your advance curv is off a bit now. with a hotter cam you can not normaly run as much advacne as you did with a milder cam.

i would be looking at the vacuum advance, it is the most likely to give you what i call mid throtle ping.

better yet get a crane adjustable vacuum unit. they come with re-curv spring's for the mechanical advance and great instruction's. i bet this will solve the problem.

oh normaly a minor ping can also be cured by droping the inital timing by around 2* too. but the curve kit is the best way.
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