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Author Topic:   WOT Popping
perk
Gearhead

Posts: 338
From: Staley,nc
Registered: Sep 2000

posted 07-01-2001 09:00 PM     Click Here to See the Profile for perk   Click Here to Email perk     Edit/Delete Message   Reply w/Quote

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

posted 07-01-2001 11:08 PM     Click Here to See the Profile for steve'66   Click Here to Email steve'66     Edit/Delete Message   Reply w/Quote
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

posted 07-02-2001 05:50 PM     Click Here to See the Profile for perk   Click Here to Email perk     Edit/Delete Message   Reply w/Quote
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

posted 07-02-2001 06:19 PM     Click Here to See the Profile for steve'66   Click Here to Email steve'66     Edit/Delete Message   Reply w/Quote
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

posted 07-02-2001 06:25 PM     Click Here to See the Profile for steve'66   Click Here to Email steve'66     Edit/Delete Message   Reply w/Quote
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

posted 07-02-2001 10:30 PM     Click Here to See the Profile for perk   Click Here to Email perk     Edit/Delete Message   Reply w/Quote
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

posted 07-03-2001 12:18 AM     Click Here to See the Profile for steve'66   Click Here to Email steve'66     Edit/Delete Message   Reply w/Quote
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

posted 07-03-2001 12:46 PM     Click Here to See the Profile for Moneymaker   Click Here to Email Moneymaker     Edit/Delete Message   Reply w/Quote
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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