Just fitted a road carb - yippee!!
Just fitted a road carb - yippee!!
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Rusti Evo

Original Poster:

537 posts

223 months

Wednesday 14th May 2008
quotequote all
Recently fitted a new double pumper and whilst it was better than the old one, it is still a bit of a fuel-puking horror. Good when you've really on it but rubbish off idle etc. So prior to doing the EFI bit I thought it would be a cheap experiment to put on a bog standard vacuum secondary road carb. (street avenger).

Fantastic transformation !!!!! smooth smooth smooth acceleration, and almost like a proper car around town.

Top Gear circuit Tuesday, see whats it's like when full on.

Next step will be to add PCV and see if the silly oil consumption is improved.




Edited by Rusti Evo on Wednesday 14th May 18:33

eliot

11,995 posts

283 months

Wednesday 14th May 2008
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I'm sure people specify "double pumpers" because they sound cool, without actually understanding how it works and what its appropriate for. Whereas vacuum secondaries ensure they only open when they are required, so when you are pootling around town - you only use the primaries and therefore your inlet velocity is kept high and thus promoting better fuel atomisation.

martinlaw

283 posts

251 months

Thursday 15th May 2008
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My double pumper works fine around town and on the race track!

My wife also agrees!!!!

Martin.

gtr-gaz

5,281 posts

275 months

Thursday 15th May 2008
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So that's two carbs you have bought in two months!

What, with the spare Demon I gave you, I make that a total of three spare carbs you have lying aroundwinksmile

Great news that it has improved low speed drivability, though. thumbup



ETA, I have another spare Holley 750, should you need one!!

Edited by gtr-gaz on Thursday 15th May 18:32

Rusti Evo

Original Poster:

537 posts

223 months

Thursday 15th May 2008
quotequote all
gtr-gaz said:
So that's two carbs you have bought in two months!

What, with the spare Demon I gave you, I make that a total of three spare carbs you have lying aroundwinksmile

Great news that it has improved low speed drivability, though. thumbup



ETA, I have another spare Holley 750, should you need one!!

Edited by gtr-gaz on Thursday 15th May 18:32
Carbs eh, what fun!!! It'll be like carb city here soon ....... However the car's roaring like a bu99er thumbup Good thing it's in the best colour Gary! Quiet and subtle.........

Got a plan for late June which should be quite jollywink

Dale B

80 posts

250 months

Friday 16th May 2008
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Anyone ever fitted 4 weber downdraughts with any success.