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HS4 SU - urgent

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FlyingFinn
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HS4 SU - urgent

Post by FlyingFinn » Tue Jun 26, 2007 11:47 pm

Is it possible to get twin HS4 SU carbs working properly on standard 1.3l engine or with some tune up? Im thinking of buying ones so advice is needed asap.. :roll:


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Post by keith » Tue Jun 26, 2007 11:58 pm

they can be made to work: however, conventional wisdom would be that twin 1 1/2 su's on a standard 1275 would be to much carb. although they look and sound wonderful.
really to make the most of them you would need a stage 3 head, manifold and exhaust, in my opinion.

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Post by FlyingFinn » Tue Jun 26, 2007 11:59 pm

would a price of 80euros sound to bad for a twin one with out manifold? :)
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Post by The Marcos Graveyard » Tue Jun 26, 2007 11:59 pm

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Post by The Marcos Graveyard » Wed Jun 27, 2007 12:03 am

Don't forget you'll need a pair of air filters or a Twin carb airbox and filters, do you know what the carbs were originally on ? Is there a little aluminium tag on one of the dashpots with a code on it ?
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Post by FlyingFinn » Wed Jun 27, 2007 12:05 am

I dont know where they are from originaly, but I got one mini guy from Finland selling them who settled with the smaller ones..

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Post by keith » Wed Jun 27, 2007 12:10 am

price 80 euro? *really* depends on condiiton... make sure the pistons fall togehter, evenly and without binding. if they do bind not all is lost. it could be a dodgy needle or badly set up jet. and also check for hard to get bits like the linkage. oh, do make sure that its a pair of *twin* su's, not two regular SU's. there used to be a tag on the float chambers with a number which indicated where they came from. not all twin 1 1/2 SU's came from minis: some came from midgets, lots from MGB's an ive even seen them on old mk1 escorts. have you sourced a manifold for them?

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Post by FlyingFinn » Wed Jun 27, 2007 12:12 am

was thinking of getting the manifold from fleabay if I would purchase these.. thanks for the quick replys, btw!

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Post by The Marcos Graveyard » Wed Jun 27, 2007 12:18 am

If worst comes to worst, you can always get rebuild kits from Burlen, they will aslo overhaul them for you, but it can work out expensive.
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Post by The Marcos Graveyard » Wed Jun 27, 2007 12:19 am

[quote="FlyingFinn"]thanks for the quick replys, btw![/quote]

Well you did say urgent. :lol:
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Post by The Marcos Graveyard » Wed Jun 27, 2007 12:24 am

While on fleabay, see if you can get yourself a Carb-balancer,i t's used to set the correct air speed through each carb. It can be done by ear, with the aid of a bit of tube, but the balancer is easier to use and more accurate.

While your at it get a petrol can too, twin carbs can drink the juice if you are a bit heavy on the right foot.
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Post by FlyingFinn » Wed Jun 27, 2007 12:25 am

:lol:

I guess I will still think about it before buying.. Stage 3 would be nice too, but there would be other carbs for that too, right?

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Post by keith » Wed Jun 27, 2007 12:34 am

yes, you could put a webber on it, or a pair of splt webbers.. €€€€ but really,.. where are you going with this? you will get better economy and dirveability with a stage 1 kit that includes both manifolds, and exhaust. and at €80 you are half way there. if you are re-creating a "look" then the 1 1/2 are fine.

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Post by FlyingFinn » Wed Jun 27, 2007 12:37 am

Sorry, but im a bit of a noobie with the mini tuning.. I was just wondering if they would be a bargain or not and was thinking of couple of extra hp. along the way. :)

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Post by The Marcos Graveyard » Wed Jun 27, 2007 12:53 am

I wouldn't rush into it Tommi, you can always pick up a set on ebay at a later stage.

TBH a well set up HIF44 is as good.
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Post by FlyingFinn » Wed Jun 27, 2007 1:05 am

cheers, mates!

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Post by DaveC » Wed Jun 27, 2007 10:37 pm

You could always buy them for 80 and then ebay them for another few euro!

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Post by woody » Thu Jun 28, 2007 2:38 am

My favoret carbs.A good price if it includes manifold and linkages.
TMG should remember we got over 45 mpg on mtm and we weren't taken it too easy.I recently switched back to my twins after running a HIF 44 and deffinitly better but they must be tuned propperly to start with.

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Post by Merlin » Fri Jun 29, 2007 10:55 pm

Ro you got fantastic pro on Mondello to dont forget was realy impressed with the goes of woddy on MTM to there is a lot to be said for Twins.

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Post by city998 » Sat Jun 30, 2007 6:30 pm

"Sorry, but im a bit of a noobie with the mini tuning.. I was just wondering if they would be a bargain or not and was thinking of couple of extra hp. along the way. "
Stage 1 kit is worth 20% more power if set up correctly. I certainly felt the difference in mine. :D

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