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Sept 21, 2008 19:03:42 GMT
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Hi All currently planning on changing my golf 16v mk2 to run bike carbs, i have a set of 900fireblade carbs, facet red top pump and a standard manifold i am in the process of having cut down but am after a bit of advice: 1: will this hose be ok to run between the manifold and the carbs? www.demon-tweeks.co.uk/products/ProductDetail.asp?cls=MSPORT&pcode=SAMFSHL6.52: what is the best length of manifold from the head to the back of the carbs? (i am after low down power realy as i plan on doing a few track days and general b road blasting so a quicker pull will be a benefit.) 3: i understand i need a 180 main jet will i need any other idle jets etc? (running a standard 1.816v mk2) 4: can i run the original fuel pumped line into my facet pump then through a pressure regulator to drop the psi then into the carbs? 5: has anyone got a spare throttle cable holder that i could possibly take off their hands to modify to work with the carbs? 6:is anyone else running this on a equal car and if so what is it like and what sort of power are you running i am sure there will be loads more questions as i get this up and going but all help will be great Cheers in advance Ben |
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Sept 25, 2008 19:47:14 GMT
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Sept 25, 2008 20:22:09 GMT
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Hi Ben,
1. Suspect that might be too soft and bendy, unless short possibly. OEM rubbers are pretty tough things. A bit of flex is good to help isolate the carbs from vibes, but bouncing about is no good. The float needles are small and delicate.
There's cheaper sources of silicon hose out there, the bay and poss places like NF Auto.
2 No idea of an ideal length but shortish is good would've thought, short straight shot best
3 Got to try & see, stand to be corrected but can't see how anyone can tell you definitely what main jet you'll need. A good strarting point sure and maybe spot on, but it all depends on yr inlet, filters, exhaust etc etc
4 My feeble brain can't work that one out quite, but if the efi pump is gone all's good, guessing the carbs would want about 5psi
HTH a bit. Sounds like good mods, send pics when fettling!
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'66 Amazon <-> '94 LS400 <-> '86 Suzuki 1135 EFE
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Sept 25, 2008 21:15:45 GMT
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hi bob
which one is too soft the one on ebay or the one on demon tweaks?
i will post images as and when i get cracking
Cheers
Ben
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Sept 25, 2008 21:48:22 GMT
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The silicon hose i've seen is a lot more flexy than OEM inlet rubbers. But maybe in short runs, it'd be OK. Best check some out before parting with a lot of £s really. Maybe someone'll be along who's tried it out.
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'66 Amazon <-> '94 LS400 <-> '86 Suzuki 1135 EFE
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kee
Posted a lot
Posts: 4,991
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Sept 25, 2008 21:53:38 GMT
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i reckon you would be better off putting bike throttle bodies on rather than carbs  since as yours is already running injection. |
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jikovron
Part of things
mechanical chaos
Posts: 633
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Sept 25, 2008 22:52:23 GMT
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second question: a long manifold with thin bores gives good midrange pull (200-300mm from valve seat to carb inlet)
a short manifold with wide bores will give high rev power (no drivability) so i'd use a manifold that's short but has thin bores to give a wider power band (balancing the short length=higher top end power with thin tubes to keep the gas speed high (because its a standard engine),,,,,,,,,,,,,,,,,
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v8chevette
Posted a lot
PROUD TO BE BEIGE!!
Posts: 1,109
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Sept 26, 2008 5:59:06 GMT
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4: can I run the original fuel pumped line into my facet pump then through a pressure regulator to drop the psi then into the carbs? Just use a Fireblade fuel pump and get ris of the VW item. The Fireblade one will run the correct pressure for the carbs  |
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ezzysi
Posted a lot
Posts: 1,189
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Sept 26, 2008 7:47:43 GMT
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4: can I run the original fuel pumped line into my facet pump then through a pressure regulator to drop the psi then into the carbs? Just use a Fireblade fuel pump and get ris of the VW item. The Fireblade one will run the correct pressure for the carbs Do carb'd bikes run a pump??, I thought they were gravity fed from the tank. |
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1991 Mk2 Golf Gti 8v
2005 Passat tdi (daily)
1971 Mk1 Escort
2004 Touran (her's)
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Sept 26, 2008 7:57:43 GMT
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Carb'd bikes do often have pumps, especially those with gert big airboxes in the tank area.
Runners thing is a point, 16v's are pretty cammy aren't they, lots of action around 4k revs up.
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'66 Amazon <-> '94 LS400 <-> '86 Suzuki 1135 EFE
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Sept 26, 2008 10:44:01 GMT
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second question: a long manifold with thin bores gives good midrange pull (200-300mm from valve seat to carb inlet) a short manifold with wide bores will give high rev power (no drivability) so i'd use a manifold that's short but has thin bores to give a wider power band (balancing the short length=higher top end power with thin tubes to keep the gas speed high (because its a standard engine),,,,,,,,,,,,,,,,, I have measured it all up to run 200mm from the block to the end of the trumpet so hopefully will gain some low end torque which is where it is needed |
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Sept 26, 2008 11:22:39 GMT
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4: can I run the original fuel pumped line into my facet pump then through a pressure regulator to drop the psi then into the carbs? Just use a Fireblade fuel pump and get ris of the VW item. The Fireblade one will run the correct pressure for the carbs just got my filterking regulator so hopefully i can get the pressure set correct |
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berendd
Europe
why do I need 3 keys for one car?
Posts: 1,449
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Sept 26, 2008 12:45:42 GMT
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get a radiator hose at the scrappies and cut into pieces, will cost nawt..
and use an original fuel pump from the bike, they pressure regulated allready.
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Sept 26, 2008 14:23:03 GMT
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will radiator hose be ok for fuel coming from carbs to manifold?
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Sept 26, 2008 20:21:11 GMT
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