Author Topic: Weber carbs for a buick v6, hold on  (Read 866 times)

Offline buickfed

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Weber carbs for a buick v6, hold on
« on: June 12, 2020, 01:40:35 PM »
new dilemma. naturally buick only. bought this 125'' altered. we are going to try to run the altered with 2 buick v6's. back one will be with a 4-71 on it. front one will be with an inglese weber setup. these were made when mr peabody and the wabac machine was on tv.
the webers are a 3bbl and belong on a 67-68 Porsche. needless to say they are worth some dough.
the dilemma is cooling. making a water cooled system would be a big pain, so we are thinking of ''drinking fluid''. the big question is can we run ''drinking fluid'' in the webers? the holleys are no problem, just the webers. anybody know anything about this wild scenario?? lol

you chebbie guys got it easy.....come over to my side.....lol

Offline jeff/21

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Re: Weber carbs for a buick v6, hold on
« Reply #1 on: June 12, 2020, 04:15:31 PM »
You can run alky in anything as long as the passages and jets are big enough.
but why run two different motors, one with a blower should be enough and run a bigger blower which would make the same boost at a lower speed.

Offline buickfed

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Re: Weber carbs for a buick v6, hold on
« Reply #2 on: June 12, 2020, 07:58:20 PM »
just to be different. besides the engine is just sitting around doing nothing.
the fed uses a 350 buick with a 6-71 on it. how many of those do you see around

Offline noslin

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Re: Weber carbs for a buick v6, hold on
« Reply #3 on: June 14, 2020, 08:33:52 PM »
i know on the aircooled vw's with 48's (same design but two port) with alky they were not able to flow enough when you start to get up to about 300hp.  problem is bowl size mostly, not enough volumn in the bowl to keep up.  in the bowl, you can cut that web in there and increase the bowl a little bit.  youll probably have to go to 300 needle and seats and drill the piss out of the jets.  a guy (and icon in the vw industry) to talk to would be Gary Berg.  he is rebuilding the IDA'a and they look immaculate when he is done. he is in so cal.   

Offline buickfed

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Re: Weber carbs for a buick v6, hold on
« Reply #4 on: June 15, 2020, 05:59:15 PM »
stopped at the Porsche garage today to talk about the alky issue. they did say i was probably limited to h/p but it would be neat to try it. the mechanic ran buick turbos in days past. more thought is needed.
they just replaced an engine in one of the Porsches. it came in with a 215 buick engine in it. thats different. ;D

Offline gordon

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Re: Weber carbs for a buick v6, hold on
« Reply #5 on: June 19, 2020, 03:06:23 PM »
Should be able to duplicate the float less system that was used years ago. Needles and float removed for unrestricted flow.  Bowls were tapped for fuel outlet line (don't) remember size of fitting but larger than inlet. Located so fuel never gets above normal high mark when using floats. It is now constant flow , use low pressure and high out put alky compatible pump.  As long as pump can supply more volume than what engine can pull through the jets you are golden. The jets and circuits must flow a bit more than double the amount of gas by weight. I have some charts stashed some where . I will look.  This system was used for a while on VW& porsche powered off road race cars to combat float bounce flooding problems .  Also used to use Methanol fuel in Mikuni motorcyle carbs for drag racing. Did not have to delete floats on those. Just used correct jets , needles , and needle jets (emulsion tubes) in order to flow larger volume required. As far as the Mods to the down draft webers info should still be floating around on internet. I think it was called constant flow or floatless system. I can't remember that far back. internet search should come up with this stuff if I can't find it on book shelves.

Offline noslin

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Re: Weber carbs for a buick v6, hold on
« Reply #6 on: June 19, 2020, 06:01:52 PM »
Should be able to duplicate the float less system that was used years ago. Needles and float removed for unrestricted flow.  Bowls were tapped for fuel outlet line (don't) remember size of fitting but larger than inlet. Located so fuel never gets above normal high mark when using floats. It is now constant flow , use low pressure and high out put alky compatible pump.  As long as pump can supply more volume than what engine can pull through the jets you are golden. The jets and circuits must flow a bit more than double the amount of gas by weight. I have some charts stashed some where . I will look.  This system was used for a while on VW& porsche powered off road race cars to combat float bounce flooding problems .  Also used to use Methanol fuel in Mikuni motorcyle carbs for drag racing. Did not have to delete floats on those. Just used correct jets , needles , and needle jets (emulsion tubes) in order to flow larger volume required. As far as the Mods to the down draft webers info should still be floating around on internet. I think it was called constant flow or floatless system. I can't remember that far back. internet search should come up with this stuff if I can't find it on book shelves.

there was an article in hot vw's back in the 80's one time on (what they called it)  full flowing the carbs.  tried to find it a few years ago but no luck.   aside from having enough volume i dont think the jets can be opened big enough to provide the fuel. 

dean

Offline buickfed

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Re: Weber carbs for a buick v6, hold on
« Reply #7 on: June 20, 2020, 10:43:48 AM »
cool. info is always appreciated for things not normal. lol