paul_mcq
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| posted on 27/1/05 at 11:23 AM |
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carbs?
i have a su carb size 1.5 inch would i be best using it or a weber 45 for a slightly tuned 1275 a series? plz get back. cheers
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white130d
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| posted on 27/1/05 at 12:15 PM |
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Yes
You can run a 1.5 with a red spring BQ needle (according to page 93 of Tuning the A Series Engine by David VIzard).
I run a 1.5 with a blue spring and E3 needle on my 998 with a mod. head and 3 branch.
David
"There's only 2 things that money can't buy, and that's true love and home grown tomatos" Guy Clark
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timf
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| posted on 27/1/05 at 12:31 PM |
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1275 go for an 1 3/4 hif su or a 45 on a proper manifold
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Peteff
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| posted on 27/1/05 at 12:42 PM |
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Weber is not a lot of gain for the money including jetting etc. S.U. is easier to keep in tune and much more available, also more economical on fuel.
If you can get a twin S.U. setup even better
yours, Pete
I went into the RSPCA office the other day. It was so small you could hardly swing a cat in there.
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white130d
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| posted on 27/1/05 at 12:51 PM |
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For the 1275 I am building for the 7, I have both a set of 1.25 SUs and a 45 dcoe set up. I want to experiment using the Vizard book set ups to see
if I can tell the differences. The Weber should be better at top end and the SUs should pull well but start to loose a little at top end. I have a
feeling I will be happiest with the SUs.
D.
"There's only 2 things that money can't buy, and that's true love and home grown tomatos" Guy Clark
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britishtrident
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| posted on 27/1/05 at 04:33 PM |
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Vizard book is well and truly out of date find a late MG Metro in the scrappies and use everything off that -- find one late enough and will even
have hardened valve seats for unleaded.
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rusty nuts
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| posted on 27/1/05 at 06:05 PM |
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MG manifold can also be modified to make it even more efficient, worked well on my old mini pick up with modded MG engine, pulled like a train and
gave good economy if driven sensibly.
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