[DML] Hot Exhaust - continued

["Nick" <nicholden@xxxxxxxxx>]

Hi,

For those of you that were following my problems i have an update.

I have removed the rocker cover and checked the valve clearance again 
which was ok. The cam is not flatt spotted and all looks normal. I 
have removed the extractors and watched cyclinder 1&2 exhaust valve 
opening and closing as normal.

>From a dead cold engine extractor 1 & 2 is getting 200deg c hotter 
after just 2 minutes of running at about 1500 rpm.

Could a lack of air to those two cyclinders be causing excessive 
temps? Extractor 3 was also slightly dis coloured but not showing the 
same excessive temps when running. The way the air enters my manifold 
it may be possible it is mainly been directed to the other bank and 
starving 1,2 &3. I am at a point now that i have to look at everything.

The plugs on 1,2&3 would indicate it is not a fuel problem but it did 
occasionally blow a flame out of the exhaust on decel. that would 
indicate raw fuel in the exhaust. 

My theroy is that due to a lack of air in Cyc 1,2 the fuel is not 
burning correctly and in the combustion chamber and igniting in the 
extractor. Cyclinder 3 is not geeting as hot becasue it is still 
getting a small amount of air as it is the first cyclinder on that 
bank.

Any other thoughts and comments are welcome!

You can see some pictures of the manifold set up under ' Oz 
supercharger'

Cheers, Nick









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