Rob
Posted a lot
You know, for kids!
Posts: 2,515
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May 14, 2007 20:49:09 GMT
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Need a bit of guidance . . . I've been fiddling for days but the plugs are still getting sooted up and the exhaust stinks . . . I have twin SUs on the V8 and need some sure fine tuning tips. The pickup is my daily now . . . I have them balanced with the linkages off (you'd need to be pretty stupid to try and do it with them connected   not that i'd know of course) The mixture screw - I assume clockwise is lean? Any idea how many turns out would be a good place to start ? Cheers guys and guyettes Rob |
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Rob
Posted a lot
You know, for kids!
Posts: 2,515
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May 14, 2007 20:54:09 GMT
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last year at CaRS - 'cruisin'  |
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Last Edit: May 14, 2007 20:54:40 GMT by Rob
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stinkwheel
Posted a lot
Doctor Of Gonzo Journalism - One of gods own proptypes, never even considered for mass production.
Posts: 2,280
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May 14, 2007 20:57:00 GMT
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I know nothing about balancing but do you have more pics in the readers rides eection or something as i need some more epics of your very very cool marnina  |
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1973 Citroen Dyane 6 1980 Citroen Acadiane
1992 Citroen AX 1990 Citroen BX
1997 Citroen XM 1993 Citroen BX
1997 Citroen Xantia 1977 Citroen Ami 8
1996 Ford Escort 1989 Citroen BX
1997 Suzuki RF900 1988 Yamaha TDR250
1979 Honda CB400.
'I need less vehicles'
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Rob
Posted a lot
You know, for kids!
Posts: 2,515
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May 14, 2007 21:21:34 GMT
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Aw shucks... some here - loads done since then tho |
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Last Edit: May 14, 2007 21:22:00 GMT by Rob
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Dez
Club Retro Rides Member
And I won't sit down. And I won't shut up. And most of all I will not grow up.
Posts: 11,790
Club RR Member Number: 34
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Tuning SU Carbs - Rover V8Dez
@dez
Club Retro Rides Member 34
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May 14, 2007 21:28:05 GMT
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theres a reson holley carb conversions are so popular  |
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madmart
Part of things
love is: valvebounce in top gear
Posts: 559
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you want to get a gunsons colourtune, its a see through plug that lets u see how the mixtures burning from either carb. made setting my tc's carbs a doddle mine was about 22 quid from halfrauds |
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Holleys are way thirsty and leak. Weber 38DGAS or DGAV is what you need on a RV8 3.5
I used to pay to have my twin SU RV8 ballanced and tuned by a mate in the trade who knows them well. Money well spent, he could make it run much sharper than I could.
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1941 Wolseley Not Rod - 1956 Humber Hawk - 1957 Daimler Conquest - 1966 Buick LeSabre - 1968 Plymouth Sport Fury - 1968 Ford Galaxie - 1969 Ford Country Squire - 1969 Mercury Marquis - 1970 Morris Minor - 1970 Buick Skylark - 1970 Ford Galaxie - 1971 Ford Galaxie - 1976 Continental Mark IV - 1976 Ford Capri - 1994 Ford Fiesta
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May 15, 2007 10:36:29 GMT
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definatly worth getting em looked at by someone who knows what they re doing, mine fires instantly cold or hot and will tick over reliably on or off choke and it don't hesitate or splutter as you open the throttle.
the standard carbs can and do run it fine so don't go spending money on new ones until you've had yours checked out properly.
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Volvo back as my main squeeze, more boost and some interior goodies on the way.
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Rob
Posted a lot
You know, for kids!
Posts: 2,515
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May 15, 2007 11:39:22 GMT
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Cheers - it does seem to be a black art.
I can get them balanced - mixture set (I have a colourtune) and idling but still there's hesitant acelleration (sp?) and bogging down.
Verdict: Get a man in !
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May 15, 2007 11:43:17 GMT
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i was gonna suggest an SU friendly rolling road but seems its already been mentioned
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May 15, 2007 11:45:20 GMT
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Is the dashpot fluid level correct in both carbs? Worth stripping them partially and giving them a good swill out with some WD40 and a rag, make sure they're all moving correctly and without stiction |
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Last Edit: May 15, 2007 11:45:55 GMT by Lewis
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May 15, 2007 12:54:08 GMT
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^^^ cause of many acceleration/flat spot probs with SUs
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1941 Wolseley Not Rod - 1956 Humber Hawk - 1957 Daimler Conquest - 1966 Buick LeSabre - 1968 Plymouth Sport Fury - 1968 Ford Galaxie - 1969 Ford Country Squire - 1969 Mercury Marquis - 1970 Morris Minor - 1970 Buick Skylark - 1970 Ford Galaxie - 1971 Ford Galaxie - 1976 Continental Mark IV - 1976 Ford Capri - 1994 Ford Fiesta
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May 15, 2007 13:22:36 GMT
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Volvo back as my main squeeze, more boost and some interior goodies on the way.
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Rob
Posted a lot
You know, for kids!
Posts: 2,515
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May 15, 2007 14:26:04 GMT
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Rolling road would be a great idea.
Rolling road near Doncaster anyone ?
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May 15, 2007 14:49:03 GMT
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You can do a lot worse than Nottingham Carburettor and Injection Centre, Crocus St. The Meadows, Nottingham. Yellowpages webby will have the phone no. Or see if someone closer comes with a recommend. A chap I used to know took a TR6 down there and lef thtem just to "sort it all out". He was well preased with the results but I'd have done a slight freak at the bill though, they completely rebuilt everything. Mind you for the owrk they did the labour was reasonable. Anyway, I digress, they are who everybody of note round here uses for tuning and they can still set up twin SUs
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1941 Wolseley Not Rod - 1956 Humber Hawk - 1957 Daimler Conquest - 1966 Buick LeSabre - 1968 Plymouth Sport Fury - 1968 Ford Galaxie - 1969 Ford Country Squire - 1969 Mercury Marquis - 1970 Morris Minor - 1970 Buick Skylark - 1970 Ford Galaxie - 1971 Ford Galaxie - 1976 Continental Mark IV - 1976 Ford Capri - 1994 Ford Fiesta
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not that i'd know of course)
