AHHHHHHHHH. Carby problems (Evidently it's not my 5)

Boags · Postby **Boags** » Thu Jul 13, 2006 4:28 pm

Bastard of a thing is driving me nuts. I have a twin stromberg 150 setup on a 930cc 4 cyl Hillman IMP. It is not cooperating with me at the moment...

One of the carbs is auto choke, the other manual(try finding new(old stock) 30 year old carbies, you take what you can get). Engine only starts with full choke on the manual. Once it's really warm, the autochoke carb is fine, the other is still dodgey, and requires at least 1/2 choke. If you rev and let the choke off, those cylinders start dying.

This leads me to think that this carb isn't getting enough fuel, but it is in the same fuel line as the other carb... Both needles are all the way out, if anything it should be running rich.

/end rant/

Any ideas, pleeeeeeeeeeeeeease help.

Boags

irwin83r · Postby **irwin83r** » Thu Jul 13, 2006 4:49 pm

im pulling appart my dads old merc at the moment.. dear god old carbs are rediculas!! :shock:

all i wanted to do was remove the crack exhaust manifold... but not being a cross flow head.. and being german :roll:

means i have to remove the inlet side of things too get off the outlet side of things :shock:

wouldnt be too bad if they didnt put the nuts and bolts in places spanners dont fit

(sorry i needed a rant too

)

have you tried flushing out all the ports and jets etc.. no poo in there?

if you do find out what the problem is please post it up here... i might need some similar advice once i put this thing back together

chrislevingston · Postby **chrislevingston** » Thu Jul 13, 2006 5:25 pm

Boags,

I am restoring a Bond 875 (3 wheel beastie with a Hillman Imp engine and transaxle), and Speedy Spares have all of the bits you will ever need for an Imp.

http://www.speedyspares.co.uk/

HTH - Chris

Boags · Postby **Boags** » Thu Jul 13, 2006 5:38 pm

chrislevingston wrote:Boags,

I am restoring a Bond 875 (3 wheel beastie with a Hillman Imp engine and transaxle), and Speedy Spares have all of the bits you will ever need for an Imp.

http://www.speedyspares.co.uk/

HTH - Chris

Oh, don't you worry about that :mrgreen:

Half the car came from the UK starting from about 4 years ago, we have been gradually hoarding...

I think we will have a speedy spares sticker on the car, along with malcom anderson's shop, corley conversions, and countless others.

I'm not sure what to do about these bloody carbs though

Might find a single carb manifold and run that till the rest of the car is sorted...

Boags

chrislevingston · Postby **chrislevingston** » Thu Jul 13, 2006 6:17 pm

Malcolm Anderson is the dog's bollocks :mrgreen:

AJ · Postby AJ » Thu Jul 13, 2006 6:56 pm

aaaah..........twin stromies...........the memories................geoff, convert the auto choke carbie over to manual choke for a start, poor little engine is getting one fuel/air mixture on two cylinders & completely different air/fuel on the other two.........very confusing, & IIRC, the auto choke strombergs had different size jets in them...........if i really stretched my memory, i could tune 'em for ya......LOL..........many, MANY tortuous hours keeping a pair in perfect tune on a holden 6 taught me a lot..............supa glue was my biggest discovery, got 'em perfectly tuned & plonked a dob of supa glue on the mixture & idle screws, a WALLAH, no more out of sync strombergs :lol:

immediate suggestions: convert them to a twin manual choke setup, check ALL the jet sizes, check your idle screws are in EXACTLY the same place adjustment wise, check that BOTH the float levels are right & exactly the same.......that'll get ya started....... :mrgreen:

PT · Postby PT » Thu Jul 13, 2006 7:14 pm

Sell the imp and buy a mini... problem solved :mrgreen:

AJ · Postby AJ » Thu Jul 13, 2006 7:37 pm

PT wrote:Sell the imp and buy a mini... problem solved

oh yeah, go from twin strombergs to twin SU's...........LMAO :roll:

Boags · Postby **Boags** » Thu Jul 13, 2006 7:51 pm

PT wrote:Sell the imp and buy a mini... problem solved

Well, that won't help, I turn something that looks good and handles well(where have i heard that before??) into a bucket of bolts that handles like a barrow full of sloppy pigsh!t :mrgreen:

and an ugly bucket at that, but i've still got carbies. (Not to mention front wheel drive :roll:

)

You have to put a turbo on those things just to get them rolling :lol:

AJ - I have been corrected by he who knows all, and it seems the auto choke is in fact a no choke at all... Better have a look for a choke then eh?

Thanks for the suggestions though.

Boags - Go the mighty IMP (down with minis, a rusty death to them all :mrgreen:

)

irwin83r · Postby **irwin83r** » Thu Jul 13, 2006 8:08 pm

sorry to atemp a hijack but would any of you guys know who to talk to about a 1960's merc carb setup?

theres an adjustable piece with a ball joint on it thats on the auto choke, kinda goes between one of the throttle linkages and the choke bezel thing.. well ones broken.. know who might know what im after or know where to get one ??

cheers

irwin

PT · Postby PT » Thu Jul 13, 2006 8:10 pm

You obviously have never dríven a mini then....

Handling to rival even the MX5

AJ · Postby AJ » Thu Jul 13, 2006 8:19 pm

PT wrote:You obviously have never dríven a mini then....

Handling to rival even the MX5

that maybe, in fact it IS correct...........doesn't help the gravel rash on your arse from sitting so close to the ground but :lol:

AJ · Postby AJ » Thu Jul 13, 2006 8:21 pm

Boags'MX5 wrote:
PT wrote:Sell the imp and buy a mini... problem solved

Well, that won't help, I turn something that looks good and handles well(where have i heard that before??) into a bucket of bolts that handles like a barrow full of sloppy pigsh!t and an ugly bucket at that, but i've still got carbies. (Not to mention front wheel drive )

You have to put a turbo on those things just to get them rolling

AJ - I have been corrected by he who knows all, and it seems the auto choke is in fact a no choke at all... Better have a look for a choke then eh?

Thanks for the suggestions though.

Boags - Go the mighty IMP (down with minis, a rusty death to them all )

shouldn't be too hard.......again IIRC, the butterfly mechanism is the same on both auto & manual choke once you remove the auto choke mechanism

Adam_NAclubman · Postby **Adam_NAclubman** » Thu Jul 13, 2006 9:21 pm

US Spitfires came with stromberg 150's so maybe try a Triumph specialist. Midgets had them aswell so MG mechs might know of some aswell.

Could possibly try the Strombergs off a mk1 Triumph 2000, I dont think they're 150's but they shouldnt be toooo much bigger

bigdog · Postby **bigdog** » Thu Jul 13, 2006 9:54 pm

Strombergs are a pain on any car, and rarely produce good power gains. I would make up a manifold and run either a single 40mm DCOE Weber, or a pair of 1 1/4\" SUs off a mini. Either are infinitely and easily tuned to suit whatever state your engine is in. The Imp engine is a gem for tuning and can deliver serious HP (relatively speaking). And before you all chime in with whinges about SU tuning - I run three 13/4\" Sus on the Buchanan with zero problems and very little maintenance required. All you need is a good idea of what needles to start with (and there are good lists around - I think I have one on an old floppy disc(!) somewhere. A dyno for initial setup makes the job really easy. A weber will deliver even better results, but cost a bit more to start with.