Edis 4

[Big Vern]

Mine runs 10 degrees BTDC as Ford intended (its part of the limp home strategy). If your runs 10 degrees after Ash you aint got the trigger in the right place.....

BV

[flyerncle]

And there is definately something wrong if the manifolds are glowing red hot !
Timing or mixture.

[AshG]

Originally Posted by flyerncle

And there is definately something wrong if the manifolds are glowing red hot !
Timing or mixture.

sorry guys im going mad. your right its 10deg before tdc and your right about the fuel mix mine was underfueling at the time which will explain the glowing red exahust

will edit my above post so it reads correctly. i hope i got it right in the mag or i will have to write a correction in the next article.

[flyerncle]

Still a credit to you Ash

[AshG]

Originally Posted by flyerncle

Still a credit to you Ash

thats what i like about the forum nothing gets missed. its nice that people put me in my place when i cock up

[davidimurray]

If they are glowing red at idle then it's not really a problem - you can't do much damage at idle. If it is glowing red above this then it is running lean - or - you have an air leak in the exhaust. Often people discount the air leak theory but I've seen it quite a few times. The most dramatic being while running an engine on a dyno - one guy was mapping, I was running the dyno and another was lookout. We had the engine at 12000rpm tuning the top end of the map, everything looked good -exhaust gas temps near the headers were good. Suddenly there was a loud bang everything got very loud and my underwear changed colour. On getting everything turned off and getting in the dyno cell it soon became obvious that we had a problem - only half the silencer remained and that was glowing bright red! Turned out that with all the vibration the silencer had worked loose and was sucking as much air as it liked through the joint. The resulting burning inferno inside the can melted it!

[AshG]

mine was fine at idle but was glowing red at raised rpm. i had the carbs professionally setup on the dyno at ATSPEED in essex last week and you could clearly see the carbs were quite badly underfueling at raised rpm from the afr read out. now that they are setup the manifold doesnt get half as hot as it did.

i do recall them using a laser thermometer on the manifold a various stages to check the temp.