Not needed for the 32/36DGxV, 38DGxV or 40DFxV Weber carbs . . . bolt right on to stock manifold!Mogus said:If I decided to switch from a Solex to a Weber Carb, is an adapter plate needed? And if so, where would I get it?
a dremmil with a small flap drum (a drum with flaps of caberundum paper bonded on ) will sort the manifold (do it off the car so you can clean it without any muck getting in the engine)opelagain said:I am doing the same thing. I have a weber 32/36. By porting you widening the holes on the stock intake manifold right. If so what would be a good method to port these intakes? ALso the throttle plates on a weber are underneath correct. With the existing manifold the ports would interfere with them opening and closing right.
Wayne,wayne70gt said:This thread has me curious. I replaced my solex with a 32/36 two winters ago and made no mods to thick and thin gaskets or the intake. At that time I hadn't read about porting the intake or opening up gaskets to match the webber throat.(Novice) I haven't noticed any problems with the butterflies hitting anything. I did have to do quite a bit of grinding to the webber air cleaner adapter after having it milled though. If I pull the carb to do some mods, can I reuse the gaskets?
Mogus - What model Opel do you have and where abouts do you live in Iowa?
I have a 70 GT and live in the NE part of the State. Don't see to
many members from around these parts.
I have never had a phenolic spacer on my Weber 32/36. I have great torgue on the low end but my top end sucks. If I understand correctly from Ralley Bob's postings, by increasing the height of the Weber from the intake manifold with the phenolic spacer, I lose low end torgue but increase the top end. Is this the case? and if so- are there any limitations other than top of carb clearance on the height of the spacer?
Oh boy is this a can of wormsI've done back-to-back testing and saw a significant difference from changing spacer heights. A 1/2" change in spacer height (reduction) lost me 9 mph of top speed in one of my cars, but the acceleration improved drastically in-town.
The real problem is that a GT chassis won't tolerate much of a spacer, and that also depends on the specific intake you have... they vary from the factory in height by almost 3/8" depending on the year.
A few things to consider are:
*Length of the intake manifold studs
*Throttle linkage alignment...very critical!
Good idea. You could make a teardrop-shaped plate that screws to the top of the Weber, a little larger than the outline of the hood bubble. Some foam weather strip would seal it to the hood, and then it could be ducted to the stock air cleaner.you could make an air box that is shaped to the hood. Then make a tube, say 3" round opening and then put a cone filter on that.