g40jon
Posted a lot
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i wouldnt mind fitting an su carb to my polo. i really like the look of them and also like the fact that they are reasonably cheap to buy and you can fit ram pipes. Problem is that i don't really know a lot about them or even how to go about fitting them.
my thoughts were that i would need to make an adaptor plate so that the su carb is mounted upright, but I'm not sure on how much space that would leave!
also are su carbs a good choice from a performance perspective and are they reliable for daily use
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tomw
Part of things
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1977 VW Polo Mk1 (under restoration)
1986 VW Polo Mk2 Saloon (daily)
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su carbs on a polo?BenzBoy
@benzboy
Club Retro Rides Member 7
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 That's one way!  There's a maximum angle that you can mount an SU before things start going wrong... not sure what that is but it's not far off upright, from memory. You could also fit a pair of SU's using a custom inlet manifold... depends how far you want to go! ;D I'm a fan of SU's - nice simple design, plenty of spares available and info on tuning them. What engine is it? Some people with more knowledge than I might be able to give you some advice on what size carb would suit.  |
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murran
Part of things
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polos are either 1050cc or 1298cc i think.
but why fit an old carb like that??
"nice simple design??" yeah in 1930.........
unless your living in cuba and nothing else is available to you i wouldnt bother!!
whack some injection on it from a late polo gt or sumurt!
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I'm a fan off the good old su.
fit them to our suzuki sj's as a good replacement for the sh#t standard carb, useing a 90 deg adaptor..
only think to watch out for is icing up!(if its made out off steel)
but i made an alloy one and never had a problem ;D
jetting and oil in the dash pot is about the only other think to worry about.
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Seth
South East
MorrisOxford TriumphMirald HillmanMinx BorgwardIsabellaCombi
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are they reliable for daily use 3 billion BMC drivers can't be wrong! I very much prefer them to fixed jet type carbs which I've never got on with. No idea how performance would compare to amore modern carb but there are plenty of sizing alernatives. But if you plan to bung one on a stock engine probably best to start with settings for a similar capacity SU equipped engine. They can be tilted at 20-30 degrees as long as the float chamber is kept pretty much horizontal.  |
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Follow your dreams or you might as well be a vegetable. |
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g40jon
Posted a lot
Posts: 2,569
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That's one way! There's a maximum angle that you can mount an SU before things start going wrong... not sure what that is but it's not far off upright, from memory. You could also fit a pair of SU's using a custom inlet manifold... depends how far you want to go! ;D I'm a fan of SU's - nice simple design, plenty of spares available and info on tuning them. What engine is it? Some people with more knowledge than I might be able to give you some advice on what size carb would suit. its a 1.05 currently running a weber 32 tla thats a bit tempermental to say the least. its also somewhat breathless! |
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g40jon
Posted a lot
Posts: 2,569
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polos are either 1050cc or 1298cc I think. but why fit an old carb like that?? "nice simple design??" yeah in 1930......... unless your living in cuba and nothing else is available to you I wouldnt bother!! whack some injection on it from a late polo gt or sumurt! like i said before, i like the look of the su carb and they can't be that bad! look at some of the cars that ran them. if their good enough for a works mini cooper, they'll do me. i just want to have a little fun with it. ive had polo gts before, why build something i could buy. I'm not looking to build a rocket, thats what i have a polo g40 for. |
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jikovron
Part of things
mechanical chaos
Posts: 633
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when an su is properly adjusted and jetted(and unworn) it gives virtualy injection like fueling quality,,,,,even the choke mechanism meters the extra fuel requirement as precisely as when choke is off ,,,,,,,and unlike fixed jetters,they adjust precisely to the airflow so if the airflow full throttle the piston will not open fully (so it doesnt waste fuel unnecessarily like a weber would through the power valve)
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If Its an SU the float chamber needs to be totaly upright, if its a HiF, ie Metro type, there isnt much play in it but a little more than the SU. The SU float chamber angle varies from car to car.
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su carbs on a polo?retrowagen1234
@GUEST
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polos are either 1050cc or 1298cc I think. but why fit an old carb like that?? "nice simple design??" yeah in 1930......... unless your living in cuba and nothing else is available to you I wouldnt bother!! whack some injection on it from a late polo gt or sumurt! they came in 850cc , 950cc, 1043, 1052,1093, 1298 and everyone does gt injection. and tbh its boring anyway. even my old g40 didnt supprise me that much, yeah it was quick but id prefer some decent n/a induction noise  |
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you can find polo on carbs info @ www.polo86c.nl ther are a few riding with suxuki cbr 600 carbs It's a dutch website but i'm sure they will help you in english ;D |
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Diehard wheel geek
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g40jon
Posted a lot
Posts: 2,569
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considered bike carbs but its more work to fit, plus i'd have to spend money on making a manifold for it. its only a cheap project
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polos are either 1050cc or 1298cc I think. but why fit an old carb like that?? "nice simple design??" yeah in 1930......... unless your living in cuba and nothing else is available to you I wouldnt bother!! whack some injection on it from a late polo gt or sumurt! they came in 850cc , 950cc, 1043, 1052,1093, 1298 and everyone does gt injection. and tbh its boring anyway. even my old g40 didnt supprise me that much, yeah it was quick but id prefer some decent n/a induction noise By 1298 I assume you mean 1272? |
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Last Edit: Dec 9, 2008 13:46:40 GMT by Adam
1997 TVR Chimaera
2009 Westfield Megabusa
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nice, i am planning to do this to my car, same way too with a 90-deg elbow, anyone think the flow will be bad with such a long and convoluted inlet tract?
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g40jon
Posted a lot
Posts: 2,569
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i messaged the guy selling the stockcar polo fitted with one on ebay and he said it works a lot better than the std polo carb
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g40jon
Posted a lot
Posts: 2,569
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Dec 10, 2008 21:15:44 GMT
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person with the race polo has offered me the setup shown in the pics, so it looks like all the hard work has been done for me. cna't wait to give it a try and see what difference it makes!
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Dec 10, 2008 21:18:12 GMT
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get some good pics while its off , be intrested to see how this goes
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91 golf g60, 89 golf 16v , 88 polo breadvan
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g40jon
Posted a lot
Posts: 2,569
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Dec 10, 2008 21:40:25 GMT
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i will keep you posted! i want to fit a 1300 head aswell (don't want to fit a 1300 as i want to retain the ultra revvy nature of the short stroke 1 litre)
will probably do the work over xmas as ive a good ten days off work.
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