Visit The Dirt Forum for More Information

Author Topic:   Glowing headers
mod777
Member
posted July 15, 2002 10:45 AM
i have had this happen on street cars before and have had to jet the carb up as glowing headers are usually a sign of a lean condition regardless of temp gauge. If it is just one side glowing just jet that side up higher.


Monster
Member
posted July 15, 2002 12:20 PM
Retarded ignition timing will also cause this.


AC156
Member
posted July 15, 2002 12:35 PM
seems more often than not its timing or a vacuum leak if nothing else has changed and you have to jet. What do the plugs look like?


Brad haddix
Member
posted July 15, 2002 04:36 PM
Sorry, I just remembered you run methanol hard to read plugs balancer slip? maybe distributor gear? do both sides glow? I would like to know as I try to bank all the info I can.

[This message has been edited by Brad haddix (edited July 15, 2002).]

dirtracer14
Member
posted July 15, 2002 08:01 PM
Have you tried the header wrap, if you cant see it it aint there! Just kidding but i did have a buddy that had that prob on gas and they just wrapped it so they couldnt see it. His car would glow at certain rpms but ran fine otherwise.


millerlt3
Member
posted July 15, 2002 10:40 PM
Right off the top of my head I can think of 2 posibilities that will make the headers glow. #1: leaning the motor out, major problem such as burning holes through pistons ect. You need to find someone to read the plugs correctly and who can suggest changes to ignition timing and carb jetting to fix it. #2: over jetted or a fat condition, meaning when you are going into the corner or you lift off the throtle all the unburned fuel in the cylider and the intake manifold are not being burned properly and are dumped into the headers which are extremly hot and then it ignites causing the headers to glow red hot. Also not good, because youll wash the motor down. The unburned fuel will wash down the cylider walls bypass the rings and contaminate the oil, also causing other damage.


NRG77
Member
posted July 16, 2002 02:55 AM
I have come in from time ins and had the pipes glowing, probally from the excess fuel from running hard then coming right off the track. I have also seem other cars that had float level to high or sticky seat thats would allow excess fuel to get in the pipes. I have leaned a motor out and it didnt take to many laps (like 4) to burn the pistons all the way threw and they were forged. Now i have used cast pistons and found that when you are leaning out just a tad that you can use a magnifine glass and check the plugs for what looks like powder or salt and pepper. I just wanted to try and help some from my smart azz comment. Later


Road Warrior
Member
posted July 16, 2002 09:43 PM
When headers are glowing, this is a sign of OVERJETTING. There is too much fuel being dumped through the exhaust. Do not jet UP when this condition exists. For engine duration, its probably better to have this problem than to be too lean. The fuel mileage isn't worth a crap, but less harm is being done than leaning out a motor and detonating it. Remember, Red means Rich.


sixwillwin
Member
posted July 17, 2002 11:08 AM
I had this same problem this year. I got all these same suggestions which range all over the spectrum. I bumped the timing up 4-6 degress and the red glowing headers were gone and the engine ran much cooler. Try that first, 38 degrees to around 40.


DodgeBoy76
Member
posted July 17, 2002 01:06 PM
I agree with six,we have a prostock that the timing would always back off, because the block was decked too much and the distributor would bottom out on the oil pump shaft, we would set it to 39*, and in 10-15 laps, it would back off to as low as 23* and turn the headers bright red, you could probally put a screwdriver through them with ease. Not to mention it had no power, and sounded like you were making popcorn. So like six said, bump the timing up to around 38 or so, I personally wouldnt go over 40. Just to see if that solves it.

[This message has been edited by DodgeBoy76 (edited July 17, 2002).]

mod777
Member
posted July 17, 2002 03:20 PM
I know what your problem is ..
you would think it is way to lean..
the actual problem is its to rich
happend to us in a ministock car before we called walsh i beleive it was
the guy said it was to rich
we couldnt beleive it but we tried it
and it worked for us try that i think it will work


hobby_27
Member
posted July 20, 2002 02:23 AM
if it is running to lean it will act as if the engine is shutting down, i would say set the timming. to much fuel only smokes, and boggs the engine down also, i run mine on 32 degrees with 96 jets. runs like a dream, till the temp drops then im up to 106 jets


mod777
Member
posted July 22, 2002 09:34 PM
Well fellers, it was the timing. Without taking the heads off and finding true TDC, I can't tell exactly where I am on timing, but advancing it 5 degrees made it quit glowing. So it must have been running at about 26-29 derees in reality. I suspect the fuel was still burning on the way out the exhaust ports. My damper must have slipped a little, but I won't know how much until I find TDC. But because the motor runs so good now, I'm not messing with it till fall.

Thanks for all the advice.
777


Back to the Archives