fortyeye

Just a general question. Anyone on this forum have dual Webers (ICT or IDF)? If so, any problems? Post 'em up. Let's see if some troubles are common and if there are some common solutions. I've got some good diagrams and tech info if needed.

Quote 0 0
bumblebee73

i have dual 34 solex's on my 1641, and have had nothing but problems , but i have heard alot of good things about the 34 ict webbers. but but my older brother has duel 44 idf's on his 1915cc dune buggy and they are awsome . the car runs hi 9's and low 10's on the 1/8th.

Quote 0 0
fortyeye
I haven't set up the 34 Solex carbs, but here's a couple of links that might help. http://www.cbperformance.com/Nov2002.asp This one is from CB's site. Written by Dave Cormack (before he retired from HVW's) it's more of a product intoduction and doesn't give much tech info. http://waitresses.servebeer.com:81/vwpage/ This one is from Mark Harney's site and has some meat and potatoes. It details the tribulations associated with 35 Solex installation. Though is may not apply to the 34's specifically, it has some good tips on a dual Solex setup. One thing that Mark found was the 35's sensitivity to fuel pressure. Perhaps your 34's have this same preference. Weber's do well with 2.5-3.0 psi fuel pressure, but Solex's are not at all happy above 2.0 psi !!! On Mark's install ... he found that his 35's worked best at 1.0 psi, and had sticky needle and seat problems as well.

A couple of things that apply to every dual carb install. Do not assume that new carbs are clean, that the float levels are correct, and that a stock fuel pump will provide low pressure. All aftermarket carb installs need a systematic approach. Don't take anything for granted. Assume that your new carbs will be wrong until you personally verify everything. Don't just bolt 'em on.
Quote 0 0
bumblebee73

THANKS , I AM RUNNING AN ELECTRIC FUEL PUMP, IT PUTS OUT AROUND 3-4 PSI. MAYBE IT IS TO MUCH PRESSURE, I'LL DO SOME DIGGING NOW.

Quote 0 0
fortyeye

Excessive fuel pressure is an excellent place to start. Here's a good regulator http://www.holley.com/12-500.asp  nice and compact, with one inlet and two outlets (eliminates a tee fitting on duals), and they're available from Summitt or Jegs. Don't use the ones that FLAPS sell with the numbered dials. They look like this ^^^ They are caca ... they leak, won't give you consistant results (pressure creeps up and down) ... and did I mention ... THEY LEAK ... right through the casting. One thing we don't need is a fuel leak (nice bracket though). Let everyone know if it helps.

Quote 0 0