 little engine thing |
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| bd1308 |
 Aug 11 2005, 07:29 PM
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#1
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Sir Post-a-lot  Group: Members Posts: 8,020 Joined: 24-January 05 From: Louisville,KY Member No.: 3,501  |
everything is good and well with my car, just one thing
whenever i'm in the powerband in my engine (2500-5500) and i proceed to engage full throttle action, i get this wierd racheting sound coming from the engine bay.... my first worry was that the timing was way off....I adjusted it and the dwell and nothing has changed.... |
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| bd1308 |
Aug 11 2005, 08:24 PM
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#2
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Sir Post-a-lot Group: Members Posts: 8,020 Joined: 24-January 05 From: Louisville,KY Member No.: 3,501 |
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| GS9146Driver |
Aug 11 2005, 08:48 PM
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#3
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Member Group: Members Posts: 76 Joined: 23-February 04 From: Collinsville, OK Member No.: 1,706 |
What do you mean ratcheting sound?
Geo |
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| Mueller |
Aug 11 2005, 08:51 PM
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#4
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914 Freak! Group: Members Posts: 17,146 Joined: 4-January 03 From: Antioch, CA Member No.: 87 Region Association: None 
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i'm thinking it's his throttle cable or linkage rubbing against something (like a fuel line)
have you thought about turning the car off and pushing in the throttle to see if it makes the same sound?? |
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| bd1308 |
Aug 11 2005, 09:00 PM
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#5
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Sir Post-a-lot Group: Members Posts: 8,020 Joined: 24-January 05 From: Louisville,KY Member No.: 3,501 |
well yeah. i can floor it from idle to around 2500-3000 rpm without the sound
even in lower gears, most of the time it doesnt make the sound. higher gears is different story... is there a way that the weights in the dizzy could over extend themselves and bang against the case? wait...the vac adv/retard isnt hooked up... i dunno how detonation sounds at speed. i thought it was a ping sound. could the timing be way off? timing is presently at 0deg at 3500rpm...runs great, except at full throttle. |
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| SLITS |
Aug 11 2005, 09:34 PM
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#6
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"This Utah shit is HARSH!" Group: Benefactors Posts: 13,602 Joined: 22-February 04 From: SoCal Mountains ... Member No.: 1,696 Region Association: None  |
If you were at 0 Deg, I doubt the car would accelerate and would run like shit.....igniting the fuel/air mix in advance of TDC gives the shit time to burn....it is not an instantaneous explosion (detonation).
Since the burn time (flame front advance) is constant for a given fuel/air mix, the higher the rpm, the more advance is needed to keep from putting unburned mixture down the tailpipe. Me thinks you should study combustion technology just a little bit more. And detonation is not a ping ping....it is a rattle and it will destroy bearings, piston decks and heads. |
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| mike373 |
Aug 11 2005, 09:34 PM
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#7
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Member Group: Members Posts: 198 Joined: 3-August 05 From: san diego, ca Member No.: 4,536 |
I think I know what you are talking about......kind of a mechanical oscillation at certain rpms. I think mine is the shift linkage vibrating.
Mike |
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| Allan |
Aug 11 2005, 09:40 PM
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#8
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Teenerless Weenie Group: Members Posts: 8,373 Joined: 5-July 04 From: Western Mesopotamia Member No.: 2,304 Region Association: Southern California |
I have a weird noise at certain rpm's as well and I hope it's something simple like that... |
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| SGB |
Aug 11 2005, 09:52 PM
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#9
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just visiting Group: Members Posts: 4,086 Joined: 8-March 03 From: Huntsville, AL Member No.: 404 Region Association: South East States |
Are these cars carburated or FI? My webers went off song at certain rpms- too much slop in the (old) linkage made the left & right sides sorta fight each other- but it was more apparent for me at lower RPMs- but that was by carefully balencing at about 3200 so it moved the out-a-synch zone down lower. I replaced the linkage and had stunnning improvement. Anyway- for me it was not only a loss of power, but sounded like a UPs truck. Now if'n y'all got that fool injecting stuff- I kain't hep ya none.
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| newto914s |
Aug 11 2005, 09:59 PM
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#10
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Senior Member Group: Members Posts: 561 Joined: 16-February 04 From: Thornton, CO Member No.: 1,663 |
Should be closer to 27deg at 3500 rpms with the vacuum advace pluged. Slits is right, if it were at 0 at 3500 rpms your car should barely run. I've always though pings and knocks sound like just that, a knock(door style, Hello) or someone tapping on the engine with a hammer, ping. |
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| bd1308 |
Aug 11 2005, 10:03 PM
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#11
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Sir Post-a-lot Group: Members Posts: 8,020 Joined: 24-January 05 From: Louisville,KY Member No.: 3,501 |
so my car is having detonation fits when i floor it.....
its a rattling noise. I will adjust timing tomorrow. 35 degree timing.... .013 inch point gap. dunno why its rattling. doesnt sound good. well until my engine explodes or i figure it out, i wont floor it anymore. |
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| bd1308 |
Aug 11 2005, 10:42 PM
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#12
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Sir Post-a-lot Group: Members Posts: 8,020 Joined: 24-January 05 From: Louisville,KY Member No.: 3,501 |
okay i figured it out....
i need to hookup my vaccuum retard connection.... but i dont have a vac fitting on the carb base.... is there some place that i'm not looking or am i missing something.... -OR- is this time to go with a different distributor? |
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| rhodyguy |
Aug 12 2005, 08:17 AM
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#13
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Chimp Sanctuary NW. Check it out. Group: Members Posts: 22,093 Joined: 2-March 03 From: Orion's Bell. The BELL! Member No.: 378 Region Association: Galt's Gulch |
how about i sell you a good (i know guys, relax) 009 for $25 +shipping? i'll throw in the cap and rotor. you have a less than optimum carb, might as well stay the path.
k |
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