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Max wedge manifolds too hot? #1654306
08/03/14 02:10 AM
08/03/14 02:10 AM
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minnesota
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president61 Offline OP
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A local guy has a 63 dodge 426 max wedge. About a month ago I took it for a short drive and when I got back the manifolds got so hot that it bubbled the paint on the inner fenders. I cleaned and lubed the distributor and brought the timing up to 15 degrees initial from 0 degrees where it was. I started it the other day and I used a laser temp gun to read the manifolds. Passenger side was 680 degrees and the drivers side was about 70 degrees less. Is this too hot? If so what should the temp be and would cause this? Thanks

Re: Max wedge manifolds too hot? [Re: president61] #1654307
08/03/14 02:15 AM
08/03/14 02:15 AM
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Western Washington
Sixgun Offline
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I think you fixed it.
I have seen (too many times) on initial startup/break in/cam break in the timing so retarded that the header tubes start to glow.
It happens so fast you barely have time to get a light on it, and a few times I just reached over and advanced the crud out of it, then got it dialed in.Neever seemed to have any lasting harm,but I do not have x-ray eyes.
Now if you wait a moment,there's a good chance someone will contradict me

Hope this helps,
Bear

BTW if memory serves,EGT runs anywhere from 550-700 degrees and goes as high as 1200 when you stand on it.

Last edited by Sixgun; 08/03/14 02:18 AM.

I'm 55 now, no time to waste. Not a week goes by that I don't hear about someone passing on.Let's get out there,smoke some tires,have a beer with a good friend,do what you have always wanted to do.I am pretty sure no one will ever say on their deathbed "gee I'm glad my life was calm and boring"
Re: Max wedge manifolds too hot? [Re: president61] #1654308
08/03/14 02:16 AM
08/03/14 02:16 AM
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Rancho Cordova, California (Sa...
hemi71x Online content
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Well, you already adjusted the timing, and advanced it, so another symptom would be to lean of a fuel mixture.
Maybe richer jets.


RF-4C Phantom 69-370 Zweibrucken, Germany

Re: Max wedge manifolds too hot? [Re: president61] #1654309
08/03/14 11:24 AM
08/03/14 11:24 AM
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Blair County,PA
62maxwgn Offline
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No problem with paint rather than passenger side valve cover,made a shield out of aluminum and that took care of that.Temp on all eight exhaust ports with a gun is around 475* average with a full 3" exhaust.

8228516-P3150429.JPG (64 downloads)
Re: Max wedge manifolds too hot? [Re: president61] #1654310
08/03/14 11:44 AM
08/03/14 11:44 AM
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Lincoln Nebraska
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RapidRobert Offline
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Quote:

Passenger side was 680 degrees and the drivers side was about 70 degrees less. Is this too hot? would cause this? Thanks


I would say way too hot. jetting/vac leak/timing/stuck heat riser. I'm curious why he had it timed at zero?


live every 24 hour block of time like it's your last day on earth
Re: Max wedge manifolds too hot? [Re: RapidRobert] #1654311
08/03/14 12:30 PM
08/03/14 12:30 PM

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Overly hot exhaust is always too little timing--simple as that
Bracket racers learned ( well Good ones) that locked out timing makes one run cool as a cuke in pits , staging, stc
Folks always make this same mistake, this topic comes up all the time
When you first fire one up get a handfull of distributor, advance it until it sounds happy ...Then...set the timing

Re: Max wedge manifolds too hot? [Re: ] #1654312
08/03/14 02:23 PM
08/03/14 02:23 PM
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Harrisburg, Pa.
screamindriver Offline
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64 sport fury, stage 3, 12.5-1 high compression max wedge...We've got some discoloration on the inner fenders and figured it was just the factory color{white}...
No way to get away from cooking the valve cover paint without making it look ugly and we've tried all different things...Mabe that's why the chrome replacements were so popular..

Re: Max wedge manifolds too hot? [Re: screamindriver] #1654313
08/03/14 03:03 PM
08/03/14 03:03 PM
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God's Country Maryland
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Set the initial timing at 19 degrees and check the temps.


I love the smell of Deer guts in the morning, it smells like... VICTORY!
Re: Max wedge manifolds too hot? [Re: GODSCOUNTRY340] #1654314
08/03/14 03:34 PM
08/03/14 03:34 PM

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Marsh Performance has super valve cover gaskets that will not "cook" a big help in that application

Re: Max wedge manifolds too hot? [Re: RapidRobert] #1654315
08/03/14 06:19 PM
08/03/14 06:19 PM
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minnesota
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president61 Offline OP
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Quote:

Quote:

Passenger side was 680 degrees and the drivers side was about 70 degrees less. Is this too hot? would cause this? Thanks


I would say way too hot. jetting/vac leak/timing/stuck heat riser. I'm curious why he had it timed at zero?


That's the way he aquired it. The car only has 482 miles on it and don't think it's been driven at all in the last 15 yeArs. Supposedly it was rebuilt to stock specs at some point. Thanks to all who have responded

Re: Max wedge manifolds too hot? [Re: ] #1654316
08/07/14 02:46 AM
08/07/14 02:46 AM
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minnesota
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president61 Offline OP
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Quote:

Marsh Performance has super valve cover gaskets that will not "cook" a big help in that application


Are they listed as a special gasket?







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