[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [New Search]
The location of the balance tube should allow for air(vacuum) to be shared between all of the clyinders. The stock setup,I believe, allows for this. My weber manifolds however did not. I had to use the weber maniflods with the solex's, because i only had single port stock ones. The original problem which the balance tube is designed to fix is: even compression with weak running and lean 1 and 3 with strong possibly rich 2 and 4. i had originally thought that my cam was bad before relizing why a lack of balance tube could cause this. I swapped it for a scat c-35 and engine actually ran worse. It still had the original problem plus it was now running lean onm 2 and 4. the addition of the balance tube caused the engine to run evenly on alll cylinders however they are all very lean. Changing from 130 to 155 main jet made NO difference. It appears that the reversion effect of the cam overlap is too much for the short manifolds. In other words, I would strongly caution against using an oversized cam in your engine if you must use these short manifolds. An example is mine. I have used c-35s in 1600s before with beetle stlye carbs, this worked fine (relatively, it did have a lumby idle the cam is designed more for 1776 and up). So it appears that I will need to reinstall the original mystery cam with the balance tube. Also, this problem should only happen with single barrel carbs, not IDFs or DRLAs. I hope this has helped some people out there. It has reminded me that no matter how much you know or have done, there are still things out there to learn. Jasper Webb- J.W. Autohaus and Flat Four Racing Get Your Private, Free Email at http://www.hotmail.com ---------------------------------------------------------------ţ8–+t info at http://www.vwtype3.org/list or mailto:help@vwtype3.org