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Intake manifold, Weber 40's on Cross flow


Vinman1
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Hope all are doing well. I need to get an intake manifold for a Cross Flow w/ twin Weber 40's. Burton has several with various lengths and they advised to take measurements, however, engine is still at re-builders. From photos, my guess is the shortest (3.1") one that Burton offers? Any inputs / advise is greatly appreciated.

 

Vin

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mine measures about 3"

are there different heights, as well?  my front air cleaner is 1/2-3/4" above the top frame rail

the Burton pic looks like mine

you could also check with pierce manifolds--on the west coast--they are weber folks

 

Charlie

 

Edited by 7Westfield
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1600 or 1700 cc? I have a Supersprint. The length is critical because the total length of the intake from the valve to the end of the trumpets controls the RPM at which the resonance enhances torque/horsepower.

 

Anker

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7Westfield, Burton does not specify the height or offset. Not sure if Westfield chassis is same dimensions my Arch. Will check with Pierce, thanks!

Anker, engine is a 1600 with a .030 overbore. I agree the longer runners are better for power, just not sure of how far the air cleaner will stick out. Most photos it looks like the rear air cleaner barely sticks out the cutout in the hood. Tony Weales rebuild restoration book says the manifold is a custom part made for Lotus / Caterham. I wish I had thought of setting the bare block in the chassis before I sent it to the re-builder. Both he and I want to run in the engine on his test stand, so I need  the intake to do so.

 

Vin

 

 

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22 minutes ago, Vinman1 said:

Burton does not specify the height or offset.

 

Actually they do.  Look at the second photo for each option and it shows a diagram marking the length, height and angle, then those three measurements are included in the Details tab.

image.thumb.png.6111fb56a0c93edc4bb0938a22eee738.png

 

-John

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