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Author
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Topic: WOT Popping
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perk
Gearhead Posts: 338
From: Staley,nc
Registered: Sep 2000
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posted 07-01-2001 09:00 PM
   
Have just recently swapped my cleveland for a windsor.This is my
first engine with a roller cam and rockers. The engine runs good
untill WOT,it then starts poping and missing back through the carb.
I'm running a 750 DP with 74 primarys and 80 in the rear.31/28
shooters and a pink cam button. It seems like to much gas when it
goes WOT.(Duh)Would dropping the jet sizes help or am I over looking
something.? Timing checks out ok. Any ideals???? !perk!
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steve'66
Gearhead Posts: 6352
From: Sonoma,CA,USA
Registered: Mar 2000
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posted 07-01-2001 11:08 PM
Perk,Sounds like an ignition problem to me. Check the plugs and the wires. Try it in the dark and look for misfiring in the cap or between wires. Look for a bad gound on your electronic ignition. Good luck, your carb jetting sounds fine BTW, SteveW
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perk
Gearhead Posts: 338
From: Staley,nc
Registered: Sep 2000
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posted 07-02-2001 05:50 PM
Took the car out today and here is what I've
found.1st,it pops back thru the exhaust.
2nd,I can mash on it untill it gets to about
3800-4000 rpm before it happens.
3rd, I rev the engine up in park,and when the secoundarys open,it sounds like it's bogging down. I'm thinking it may be in the carb and, an ignition problem.I'm real confused right now!
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steve'66
Gearhead Posts: 6352
From: Sonoma,CA,USA
Registered: Mar 2000
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posted 07-02-2001 06:19 PM
Perk,Your jetting sounds a little rich, but it won't cause this. I run 72/80 in our 750. I'm thinking that spark is bouncing all around in you distributor cap when the engine is under load. A bad plug wire will cause this, because if the spark energy can't go to the plug it has to go somewhere. Are the plugs good, how about the cap and rotor? No moisture under the cap? Does the distributor advance? Check it at 3000 rpms for total advance. Is this the same carb you used on your Cleveland? What ignition system are you running? Is it grounded to the engine? Popping out the exhaust is a retarded spark, and through the intake is an advanced spark. Yours is hitting all around, which sounds like sparks jumping around in the cap.  Good luck Perk, SteveW p.s. Are the valves adjusted right?
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steve'66
Gearhead Posts: 6352
From: Sonoma,CA,USA
Registered: Mar 2000
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posted 07-02-2001 06:25 PM
I just had another thought, do you have a rev limiter?  SteveW
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perk
Gearhead Posts: 338
From: Staley,nc
Registered: Sep 2000
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posted 07-02-2001 10:30 PM
Dang Steve,forgot all about that.LOL 
But------Found that my dist. has eat another gear,which may explain the popping and soforth.Have to figure that out 1st.(and this 1 'was' a steel gear).
perk
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steve'66
Gearhead Posts: 6352
From: Sonoma,CA,USA
Registered: Mar 2000
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posted 07-03-2001 12:18 AM
There you go Perk!That'll cause the timing to jump all over the place. Good Luck, maybe a bronze gear next. SteveW
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Moneymaker
Administrator Posts: 19686
From: Lyons, IL, USA
Registered: May 99
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posted 07-03-2001 12:46 PM
I think that we may have cured the gear eating problem over the phone. ------------------
Alex Denysenko
Co-Administrator and Moderator
NHRA/IHRA/SRA member
NHRA and IHRA SS/LA National Record Holder '00 & '01
Fleet of FoMoCo products
Moneymaker Bio
US Class Nationals link
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