mk1-forum.net

ok..so, this query basically comes about due to my 'smelly weber' thread.....but besides that issue, i'm still interested as to the difference (below).

Currently, my weber 45 DCOE is hanging off a Bryan Slark 5 inch swan neck inlet manifold...(I'm assuming it's 5 inch, although i haven't got the tape measure out)....would i be gaining anything by swapping that out for a shorter, but straight inlet manifold?

length wise (including the trumpets), it seems that it would work out about the same...but by having 'straight' lowers the weber, so the trumpets are now at the bottom of the hole, and not in the middle.

Cheers.

If you're into fine tuning your motor you really need David Vizard's book, Tuning BL's A-Series Motor. One of his comparative tests shows a DCOE 40 on a 3 1/2inch straight manifold produced 2.5 more HP at 5500 rpm than the same carb on a swan-neck manifold.

"Swan Neck manifold – a good compromise" says Graham Russell!

Even if it intend tuned 998cc engines in this article:

http://russellengineering.com.au/category/heads/