The V8 Owners Forum -

Solved, Thankyou.

Air leak - for some strange reason there was no cap covering the unused PCV inlet to the carb.

Finger over the inlet - harmony returned to the world.

Exhaust manifold temps now pretty consistent on both sides.

Now I can start sourcing my Holley sniper EFI kit. happy times ahead.

Just discovered my inlet manifold is the often criticized Offenhauser JWR 7001.

Does anyone have a schematic of the internal design - trying to trace back my engine lack of fuelling (?) on LHS to a particular barrel of the Holley 390.

Google appears devoid of such information.

Thanks

Thanks for the ideas - I'll check them tomorrow.

Fuelling would seem to be the issue - the cold side plugs are cleaner.

The dual plane manifold is not split left hand and right hand - so a blocked jet would logically affect cylinders on both of engine.

I'll check every possibility.

Thanks

Hi, 1st post - please be gentle! Living Downunder, running a TR7 v8 - Holley 390 carb, Edelbrock dual plane manifold and Mallory twin points distributor, tubular manifold, yella terra roller rockers. Thought it was running OK before attempting to upgrade to electronic ignition - epic failure. Back t...