SP450andLE Posted July 12, 2011 Share Posted July 12, 2011 I wanted to run my Mini on twin carbs when I get the 1100 engine in, so that I could get more power (combined with diff. cam, head work etc). But I talked to the Mini specialist garage, and the guy said that due to today's crap fuel (different octane rating everytime you fill up, and fuel sits around for ages before actually being pumped into your car), the twin carbs would cause problems, and pretty much need to be tuned everytime you fill up with fuel. Is this really true? Does anyone else have running issues with twin carbs? All help appreciated. Chur! Quote Link to comment Share on other sites More sharing options...
Beaver Posted July 12, 2011 Share Posted July 12, 2011 wat. seriously, that is the biggest load of shit I have heard. Quote Link to comment Share on other sites More sharing options...
kyteler Posted July 12, 2011 Share Posted July 12, 2011 ahahaha, I'm not sure why he thinks the fuel stations cycle through LESS fuel now than they did back then, when there were less cars and more stations about.... Quote Link to comment Share on other sites More sharing options...
CaMpylobacter Posted July 13, 2011 Share Posted July 13, 2011 nah they'll be sweet if set up right. my sister's mini runs a set of twin 1.5 s.u's on it and it never requires fettling. 1.25 which I imagine you'll be running are no different. My brother's one had a metro single 1.5" with all the emmisions lark on it. He recently swapped it to a twin throat downdraught weber that i used to run on an 1100 in mine back in the day. It need sfine tunning on the secondary jets as it runs a little rich but it shouldn't need tany tweaking after that. love how the joker you talked to probably just wants to take your money! Quote Link to comment Share on other sites More sharing options...
SP450andLE Posted July 13, 2011 Author Share Posted July 13, 2011 Haha yeah, I had to stop myself from laughing at him while he was talking. But I'm paranoid, do I though I would ask What are stromberg carbs like? Quote Link to comment Share on other sites More sharing options...
CaMpylobacter Posted July 13, 2011 Share Posted July 13, 2011 stick with s.u carbs bud. Quote Link to comment Share on other sites More sharing options...
SP450andLE Posted July 13, 2011 Author Share Posted July 13, 2011 Reasons? Quote Link to comment Share on other sites More sharing options...
Beaver Posted July 13, 2011 Share Posted July 13, 2011 agree. imo, (have had both SU and strombergs) su's are easier to tune/keep running nicely. there isn't really anything that can break, where as strombergs ave rubber diaphragms that wear out and split (causing shit running etc). and su's look 1000000 time better Quote Link to comment Share on other sites More sharing options...
SP450andLE Posted July 13, 2011 Author Share Posted July 13, 2011 Hmmm... anyone got some cheap twin SU's laying around? But seriously, does anyone? Quote Link to comment Share on other sites More sharing options...
CaMpylobacter Posted July 13, 2011 Share Posted July 13, 2011 I used to have a couple of sets eh. I think there might be some at the old boy's pace still. I'll see if he wants them tomorrow and post back if he doesn't. Quote Link to comment Share on other sites More sharing options...
Snoozin Posted July 13, 2011 Share Posted July 13, 2011 Always a few on Trademe http://www.trademe.co.nz/motors/car-par ... 564361.htm http://www.trademe.co.nz/motors/car-par ... 166181.htm http://www.trademe.co.nz/motors/car-par ... 445825.htm Those last ones are a bit big though.... Quote Link to comment Share on other sites More sharing options...
Beaver Posted July 13, 2011 Share Posted July 13, 2011 they are cheap enough on trademe, shoudl be able to get a set for 50 odd Quote Link to comment Share on other sites More sharing options...
Borgweiser Posted July 13, 2011 Share Posted July 13, 2011 1 3/4 inch SU off a Metro or similar makes basically the same power, and a lot easier to tune and cheaper to buy/run. Fact. Also, less likely to be worn in the spindles and rounded off screw's, bent linkages etc like most S/H SU kit's. Twin carb's do look sweet tho Quote Link to comment Share on other sites More sharing options...
SP450andLE Posted July 13, 2011 Author Share Posted July 13, 2011 1 3/4 inch SU off a Metro or similar makes basically the same power, and a lot easier to tune and cheaper to buy/run. Fact.Also, less likely to be worn in the spindles and rounded off screw's, bent linkages etc like most S/H SU kit's. Twin carb's do look sweet tho Yeah, that would be my next choice... Quote Link to comment Share on other sites More sharing options...
SP450andLE Posted July 13, 2011 Author Share Posted July 13, 2011 The strombergs I was looking at are for a 1275 Mini, so they're out Quote Link to comment Share on other sites More sharing options...
Steelies Posted July 13, 2011 Share Posted July 13, 2011 i roll twin SUs easy tune/balance use lots gas, though less now i got them sorted-er easy linkages etc have yet to sort a choke, doesnt seem to be needed so far Quote Link to comment Share on other sites More sharing options...
SP450andLE Posted July 13, 2011 Author Share Posted July 13, 2011 OK, so If I cant find a suitable, cheap twin carb setup, I will probably get a 1 3/4 SU from a Metro. Would anyone happen to have one of those laying around? Quote Link to comment Share on other sites More sharing options...
Llama Posted July 13, 2011 Share Posted July 13, 2011 SUs are elegant devices, built pretty well. The only problem I have had so far is running high ethanol content fuel causes separation in the floats and probably ain't that good if you're still rocking old school rubber lines. In saying that, non-ethanol fuel is easy enough to find (just avoid gull and certain 91 mixes) Quote Link to comment Share on other sites More sharing options...
SP450andLE Posted July 13, 2011 Author Share Posted July 13, 2011 BP isn't ethanol, is it? The one close to home just got 98, so I don't have to travel very far at all for it now! 'Cos I'm a lazy bugger Quote Link to comment Share on other sites More sharing options...
mjrstar Posted July 13, 2011 Share Posted July 13, 2011 I probably have a spare cast manifold to suit a 1 3/4 Carb and possibly a HIF44 as well... I would automatically assume that the carb would need a rebuild/new seals as it has not been used for 4-5 years. The likely-hood is I don't have a fat enough needle to run a mild 1100.. NINJA EDIT: I just had a thought that the manifold probably has epic porting to match my heavily modified 1275 head so might not perform so well on the small bore motor... also the best mod you can do to any mini is to fit a honda civic / nissan pulsar dizzy.. get rid of those nasty points.. http://www.niksula.hut.fi/~mdobruck/sii ... ien/dizzy/ there is another site (i found about 10 years ago) which has some more info bu i can't seem to dig it up again.. Quote Link to comment Share on other sites More sharing options...
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