red hot headers
Im trying to tune my carburator and 5 min ito turning on the car i notice that the headers are red hot, i check my EGT reader and its jumping from 18 to 22 wich is extreme.
What can be the problem? |
running lean? or you may have lost your leading ignition (i think)
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can i drive the car like this?
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Yes, but hell no.
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timing/lean ???? btw did you fix the RPM problem?
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Originally Posted by rotary84
(Post 8858596)
timing/lean ???? btw did you fix the RPM problem?
The headers might be skorching cause by running it lean is how i got it down to 1700rpm. Got a freind who told me that my carb was to little and that that type of carb was made to idle at 1500 its a holley 350. |
If you have a known good carb put it back on and see if the problem goes away. Otherwise it's in the ignition.
I have a Paul Yaw prepped carb and copied what he had done on a spare carb for this very purpose. It was cool when I dyno'ed both carbs to make sure I didn't screw anything up and my carb made 3% more HP. :) |
Sounds like a timing issue, vacuum leak, or the carb itself but I kind of dout that...
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Originally Posted by SLIDN7
(Post 8858663)
Still trying to, I checked for vacumm leaks and no luck so i opened up the carburator changed the power valves from 46 to 65 put it back together and nothing, played with the timming and nothing so i think ill be trying out a edelbrock 650 to c if that fixes something.
The headers might be skorching cause by running it lean is how i got it down to 1700rpm. Got a freind who told me that my carb was to little and that that type of carb was made to idle at 1500 its a holley 350. |
If the carb was too small, my gut reaction would be that it'd be hard to make it run lean if you wanted to; you'd be airstarved, I'd assume. Vacuum would be through the roof, velocities would be high, and fuel would flow like no tomorrow.
But I'm just guessing based on physics; experienced carb people, feel fee to fix my lil red wagon. |
A stock nikki flows 313 cfm. Don't replace parts randomly, find the problem first.
It sounds more to me that you have burning fuel entering the exhaust. Maybe put those smaller jets back in. Have you done the idle adjust that was written up and placed in the First Gen FAQ? It may not have the parts in the same location as your carb but the basics are there. Make sure you adjust the right mixture screw as well. I know trying to find a vacuum leak is a real pain, you spray but the damn fan blows the stuff everywhere. I just gutted the rats nest and blocked the ports I needed to just get the thing going, then got a header and its great. |
how long does it take for the headers to glow from cold start??
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Originally Posted by RustyRacer
(Post 8861781)
A stock nikki flows 313 cfm. Don't replace parts randomly, find the problem first.
It sounds more to me that you have burning fuel entering the exhaust. Maybe put those smaller jets back in. Have you done the idle adjust that was written up and placed in the First Gen FAQ? It may not have the parts in the same location as your carb but the basics are there. Make sure you adjust the right mixture screw as well. I know trying to find a vacuum leak is a real pain, you spray but the damn fan blows the stuff everywhere. I just gutted the rats nest and blocked the ports I needed to just get the thing going, then got a header and its great. |
Originally Posted by DivinDriver
(Post 8861606)
If the carb was too small, my gut reaction would be that it'd be hard to make it run lean if you wanted to; you'd be airstarved, I'd assume. Vacuum would be through the roof, velocities would be high, and fuel would flow like no tomorrow.
But I'm just guessing based on physics; experienced carb people, feel fee to fix my lil red wagon. |
Originally Posted by kiddofspeed
(Post 8861810)
how long does it take for the headers to glow from cold start??
I did mess with the carb and took it off lean status and was less of a glow. |
the last time i had a header glow was because the dist was a tooth off. i forget which direction but i think i had to advance it one tooth.
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fixed everything installing a 600 edelbrock carb.
Shes idlind at 1000, much more power and she dosent choke now. Thanks guys. |
I know I am threadjacking but what if only my REAR tube is glowing red while the front is not, car will not hold an idle and it only starts when I put oil in the spark plug holes and spin it by hand, then let it sit.
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Originally Posted by SLIDN7
(Post 8867506)
fixed everything installing a 600 edelbrock carb.
Shes idlind at 1000, much more power and she dosent choke now. Thanks guys. |
Originally Posted by rnz520
(Post 8867540)
I know I am threadjacking but what if only my REAR tube is glowing red while the front is not, car will not hold an idle and it only starts when I put oil in the spark plug holes and spin it by hand, then let it sit.
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