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Author Topic:   FAST CAR -----CHERRY RED MANIFOLDS
DSMFANATIC
Dirt Forum Racer

Total posts: 90
posted August 13, 2003 07:10 PM  
WELL OUR CAR HAS COME ALONG WELL THIS YEAR THANKS ALOT TO DIRT FORUM AND SOME LOCAL RACE TEAMS. WE STARTED WINNING FEATURES, AND HAVENT
'T BEEN WORSE THAN 4TH IN THE LAST 7 RACES AT 4 DIFFERENT TRACKS. CAR IS FAST, BUT EVERY TIME WE COME IN THE EXHAUST MANIFOLDS ARE RED(REALLY RED). 76 PRIX,3213LBS,355,FLAT TOPS,882 HEADS,SUMMIT .488 CAM,2BBL INTAKE W/ROCHESTER,VORTEC EXHAUST MAN.,PUMP GAS,36DEG ADVANCE AT 2500,WE THOUGHT WE HAD A DIST. PROBLEM,REPLACED IT.THOUGHT IT WAS STARVING FOR FUEL ,WENT FROM 60 TO 72 JETS REPLACED FUEL PUMP AND PUT ON NEW 1/2 INCH LINE FRONT TO BACK. CAR COMES IN AT 210 DEGREES W/AFCO RAD. OH AND WE RUN 6.87 FINAL DRIVE AND TURN 6300 ON A 3/8THS. ANY INPUT WOULD HELP THANKS.

rico 08
Dirt Forum Champ
Total posts: 1139
posted August 13, 2003 07:25 PM  
I've seen this alot on two barrell racing engines,it's usually too lean that causes it but retarded timing can also cause it.Do you use a degree'd timing light to check the timing?Some stock type modules will retard the timing several degrees in higher RPM's.

DSMFANATIC
Dirt Forum Racer

Total posts: 90
posted August 13, 2003 07:34 PM  
YA, WE USE A SNAP-ON DIAL WE THOUGHT IT MIGHT BE OFF SO WE USED A FRIENDS LIGHT, RIGHT ON. I'VE NEVER HEARD OF THE MODULE THING, SOMETHING TO LOOK INTO THOUGH.

racer17j
Dirt Forum Champ
Total posts: 5390
posted August 13, 2003 08:44 PM  

Crazy as it sounds, I've seen this where the engine was rich. Combination of cam design with other things, usually vortec manifolds. It seems fuel is still burning when exhaust valve opens and burning mixture gets into the manifold heating it up. Maybe the vortec manifolds have something to do with it. When I have seen this the cars were usually fast. SLEEPY

crew42tx
Dirt Full Roller

Total posts: 53
posted August 14, 2003 10:52 PM  
We are having the same problem right now. We had it last year and new valve springs did the trick. We just replaced them again, same motor same timing and same jets, same distributor or different still glowing. It would'nt bother me too much but we run the 2 1/2" ram horn manifolds and we break one every 2 or so races, they are getting expensive. We have won 3 of the last 5 races but winning barely pays enough to buy new manifold. This week we are going to try going from 37 down to 35 on the timing and see what that does after tomorrow night I'll let you know what happened.

merlinmech2
Dirt Maniac

Total posts: 131
posted August 16, 2003 07:12 AM  
Most of the over the top manifolds do that. If you put the old log style manifolds on they won't turn red. Have even run mine with one of each(manifold) on. Just make sure to keep plug wires away.

Gomer T
Dirt Full Roller

Total posts: 36
posted August 17, 2003 09:42 PM  
Do you have the dist. locked? If you do check your timing at 4500 to 5000 rpm. Had the same problem last year and our weights in the dist. changed the timing up to 3000 rpm. We had timing set at 36 degrees at 2500 rpm but when I checked this at 4500 rpm it was 44 degrees. Serious glow on the manifolds but we were fast. Just something to look at.
Gomer T.

crew42tx
Dirt Full Roller

Total posts: 53
posted August 18, 2003 10:04 PM  
well the manifolds didny glow but could reall tell the power loss. Think we'll just let 'um glow

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