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Jac Mac · 04-28-06, 06:51 AM

Hi Fella's,
Ian you have me mystified as well in relation to the GW heads as I am looking at a photo of all 3 variants of the two valve head. then you post a pic of the GW equipped car with the carbs fitted in what IMHO is the correct manner. Since the valves run in the same sequence as the basic windsor head what change's?
Keith , if you have been around holleys for a long time (like me) you will no doubt remember instances where you have had to stagger jet them to make up for differences in flow and port design etc.(BBChevs for example) along with all the other variables. With the two basic designs of IDA manifold we have one which mounts the carbs so that the airflow pattern thru them is the same on each bank of cylinders, while the other bias's flow to the bottom of the intake runner on one bank and the upper of the intake runner on the other bank. This condition will exist to some degree at any part throttle position. This all came about as Ian in making a very tidy job of the airbox heat sheild assy for his car went to a lot of trouble to turn his carbs around on one side of the manifold in order to have an "original" GT40 look.
Like Russ I go for function over form, I guess thats just the old racer in me still trying to improve the breed.

Cheers Jack.

04-28-06, 06:51 AM	#15 (permalink)
Jac Mac jac mac 10 tenths Join Date: Dec 2005 Location: Gore N.Z. Posts: 1,457 Rep Power: 19	Re: Webers the right way! Hi Fella's, Ian you have me mystified as well in relation to the GW heads as I am looking at a photo of all 3 variants of the two valve head. then you post a pic of the GW equipped car with the carbs fitted in what IMHO is the correct manner. Since the valves run in the same sequence as the basic windsor head what change's? Keith , if you have been around holleys for a long time (like me) you will no doubt remember instances where you have had to stagger jet them to make up for differences in flow and port design etc.(BBChevs for example) along with all the other variables. With the two basic designs of IDA manifold we have one which mounts the carbs so that the airflow pattern thru them is the same on each bank of cylinders, while the other bias's flow to the bottom of the intake runner on one bank and the upper of the intake runner on the other bank. This condition will exist to some degree at any part throttle position. This all came about as Ian in making a very tidy job of the airbox heat sheild assy for his car went to a lot of trouble to turn his carbs around on one side of the manifold in order to have an "original" GT40 look. Like Russ I go for function over form, I guess thats just the old racer in me still trying to improve the breed. Cheers Jack.