AndreGT6 Posted October 23, 2007 Share Posted October 23, 2007 Still battling my carbs.The rear back is stupid rich, while the front is almost perfect.I'm going to start bending the crap out of the float.I had match the set to be level in the jet, but clearly the rear carb is just sucking back the fuel and fouling the plugs.Plan B is to just buy a whole new setup.1, where does someone find new SU carbs 2, or do I consider other options?Thanks.A. Link to comment Share on other sites More sharing options...
Greeks Posted October 23, 2007 Share Posted October 23, 2007 I wouldn't have thought you'd need to go to the extent of getting new carbs, but ... 1. Andy Turner carbs in the UK is good - he will advise on what suits your 'ingredients'.Or Burlen own the Skinners Union name (so named because of all the knuckles skinned whilst working on them? :-) ) and you can get all the parts through themBoth have websites. Link to comment Share on other sites More sharing options...
rhodes Posted October 23, 2007 Share Posted October 23, 2007 During an exercise to determine why the jets on my old Mini were at different heights, I found that the float height is not that critical. What I did find was that one of the (fixed) needles had been scraping up and down on the side of the jet resulting in significant wear - hence why the jet had to be higher up to get the mixture right at tickover. Got replacement bits from Burlen down the road.But that brings me on to the question about spring loaded needles. Don't they wear out as they are designed to scrape up and down? If so, how long do they last? Link to comment Share on other sites More sharing options...
Mac Posted October 23, 2007 Share Posted October 23, 2007 Jets on mine are different heights, right mix is with one 5 flats leaner than the other Link to comment Share on other sites More sharing options...
Deleted User Posted October 23, 2007 Share Posted October 23, 2007 SU's are the bain of my life at the moment, if i cant sort soon dave will be getting a call and i'll ditch them. Link to comment Share on other sites More sharing options...
AndreGT6 Posted October 23, 2007 Author Share Posted October 23, 2007 Right I will try the needle height thing may also get new needles and some grose valves on the float?A. Link to comment Share on other sites More sharing options...
Deleted User Posted October 23, 2007 Share Posted October 23, 2007 i have grose valves and since have never had a problem with the float chamber. id recomend them. Link to comment Share on other sites More sharing options...
AndreGT6 Posted October 23, 2007 Author Share Posted October 23, 2007 Consider it done then.I'll place an order on Wed...A. Link to comment Share on other sites More sharing options...
gilesdive Posted October 23, 2007 Share Posted October 23, 2007 I had real problems balancing carbs on a Spit. finally stripped both down at the same time to discover some muppet had changed ONE of the needles, so they weren't a matched pair. New pair of needles and easy-peasy.If only all problems were that easy, eh. Link to comment Share on other sites More sharing options...
AndreGT6 Posted October 23, 2007 Author Share Posted October 23, 2007 Well the needles are old, I know that.So I'm going to buy a new set, same type and go from there.Get everything working then worry about swapping out different values.A. Link to comment Share on other sites More sharing options...
Deleted User Posted October 23, 2007 Share Posted October 23, 2007 Greeks wrote:1. Andy Turner carbs in the UK is good - he will advise on what suits your 'ingredients'.Both have websites.I agree he supplied me a superb set ran great out of the box.RobPic attached Link to comment Share on other sites More sharing options...
rhodes Posted October 23, 2007 Share Posted October 23, 2007 If you think you have a difference between carbs due to one worn needle, then it is easy to prove by swapping them over, but you may of course have a worn jet as well just to make life a bit more difficult. Link to comment Share on other sites More sharing options...
AndreGT6 Posted October 23, 2007 Author Share Posted October 23, 2007 New jets on both and I did swap the needles for the fun of it.Same results.I'm still thinking the float is not closing 100%Also, I can not get the back carb to lean out at idle. Full tight on the bolt and it still wont lean out.Front carb will.A. Link to comment Share on other sites More sharing options...
GTsixCA Posted October 23, 2007 Share Posted October 23, 2007 AndreConsider Joe Curto in Long Island NY, he is an SU guru, www.joecurtoinc.com, he claims to have NLA parts for any SU and also makes his own to a very high standard. His prices are pretty reasonable too, i had a complete re-build on a set of CD150's for $400US which i thought was a bargain. Link to comment Share on other sites More sharing options...
AndreGT6 Posted October 23, 2007 Author Share Posted October 23, 2007 Yes he redid the butterflies for me last yr.But has not answered my emailed as of late.A. Link to comment Share on other sites More sharing options...
GTsixCA Posted October 23, 2007 Share Posted October 23, 2007 i will agree he's not great about communication. Link to comment Share on other sites More sharing options...
AndreGT6 Posted October 23, 2007 Author Share Posted October 23, 2007 Hell I thought he was out of business when I saw his site down last week.A. Link to comment Share on other sites More sharing options...
GTsixCA Posted October 23, 2007 Share Posted October 23, 2007 i know, i think it used to be just www.joecurto.com, now it's www.joecurtoinc.com, not too sure why he has changed it all around.He did get a little pissy with me when i pressed him to get my carbs completed a few months aso and i will admist he left 1 gasket out, other than that he did a great job. Link to comment Share on other sites More sharing options...
Richard B Posted October 23, 2007 Share Posted October 23, 2007 Andre, are you sure the fuel presure is correct? Link to comment Share on other sites More sharing options...
AndreGT6 Posted October 23, 2007 Author Share Posted October 23, 2007 I'm not convinced I need new carbs, I just need to figure out why the back one is being a pita.but at this point a set of new ones would be so nice.A. Link to comment Share on other sites More sharing options...
AndreGT6 Posted October 23, 2007 Author Share Posted October 23, 2007 Richard_B wrote:Andre, are you sure the fuel presure is correct? No.Running an old SU pump, but it could be doing anything.I am looking for a regulator.A. Link to comment Share on other sites More sharing options...
AndreGT6 Posted October 23, 2007 Author Share Posted October 23, 2007 And that is 1 train of thought.2nd carb is getting too much fuel, but I'm not drop and over flowing.A. Link to comment Share on other sites More sharing options...
rotoflex Posted October 24, 2007 Share Posted October 24, 2007 Fuel pressure check for a carburetted car is a cheap old-fashioned type vacuum/fuel pressure gauge, which should be tried before a fuel pressure regulator.The old electric SU fuel pump should be OK, since most applications had it fueling SU carbs. I will hold on to the cool Triumph mechanical pump with the genius priming lever as long as possible: back in the day when these cars were much more common on the road, half my nice-guy work was crawling under some MG that had stopped by the side of the road to bang on the fuel pump so it would go again. Link to comment Share on other sites More sharing options...
qunvat Posted October 24, 2007 Share Posted October 24, 2007 ...so did the GT6's and Spits have different carbs?... I thought they all had Strombergs?Si Link to comment Share on other sites More sharing options...
neilnaz Posted October 24, 2007 Share Posted October 24, 2007 Spitfires have twin SUs and GT6s have Strombergs as standard. Export markets are different......... Link to comment Share on other sites More sharing options...
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