mitch2b
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| posted on 15/6/08 at 07:16 PM |
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bike carbs on pinto
Hi All,
need help, i have bike carbs on a 2,1 pinto, with 285cam,
problems is fuel consumption, 15 MPG!!!!!
cant cope with that, had them set by bogg bros, carbs are gsxr600, srads, is this the expected consumption or could they be set up incorrectly??,
if i cant sort this will be going back to the dgas, and getting 25-30mpg and a little slower to 60
Mitch
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Paul TigerB6
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| posted on 15/6/08 at 07:18 PM |
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do they have a throttle position sensor at all and if so is it set up and calibrated??
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mitch2b
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| posted on 15/6/08 at 07:26 PM |
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supposed to be yes, was same on normal dizzy, got 118 miles to 30 litres on dizzy,
last week 108 on megajolt, (was a little quicker though).
i expected a little thirsty on a blat, but not 60% less mpg.
Mitch
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jacko
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| posted on 15/6/08 at 07:28 PM |
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Hi i have a piper 285 cam- zx9r carbs and i get about 30mpg on a steady run about 60-70mph but thrash it and the consumption goes to about 20mpg
i must say i don't check that close it would slow me down
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mitch2b
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| posted on 15/6/08 at 07:33 PM |
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i didnt until i started running out, used to get 150-170 to tank, (30ltr),
lucky to get 120 now, even on a long steady run.
if i could get it to 140 i would be a lot happier, it doesnt feel that much quicker than with dgas, but does rev higher and pulls well.
Mitch
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jacko
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| posted on 15/6/08 at 07:59 PM |
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You say bogg brothers set them up ? was that on there rolling road if not then that may be the problem
When i fitted mine i thought they were good but after been on the r/road they were fantastic
Jacko
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mitch2b
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| posted on 15/6/08 at 08:04 PM |
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yep dave recconed i had 140 at the wheels, did take them off later though to add a take off for the brake vacume,
you think this could have upset them?,
i know there still quite well balenced,
would like to keep them but need a little more mpg
all help greatful
Mitch
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jacko
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| posted on 15/6/08 at 08:13 PM |
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I don't know about the vacuum part but i don't think that will help i do know i had to buy a dizzy with no vacuum so not to upset the
carbs
Some people say they can do the dizzy with a vacuum take off from all the manifold pipes
Why not ring boggs and ask there opinion?
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andyharding
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| posted on 15/6/08 at 08:44 PM |
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Is your fuel pump running too much pressure and pouring your fuel away by forcing past the needle valves?
I get good MPG with my R1 carbs.
Are you a Mac user or a retard?
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mitch2b
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| posted on 15/6/08 at 08:51 PM |
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pressure reg set at 3psi,
will ring dave, but its catching him there as im one days now and dont really get chance whilst there,
Mitch,
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jacko
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| posted on 15/6/08 at 09:06 PM |
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I use a bike zx9r fuel pump and it stops pumping when at the right pressure!!! dose yours ? if not that may be the problem
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mitch2b
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| posted on 15/6/08 at 09:08 PM |
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no, pinto pump with malpassi regulator, tuned down to 2-3psi, dave seemed to think this would be fine, bike pump i had was faulty
Mitch
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BenB
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| posted on 15/6/08 at 09:14 PM |
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All I'm saying is this-
lots of problems with bike carbs on car engines occur because of using car fuel pumps.... 
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mitch2b
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| posted on 15/6/08 at 09:26 PM |
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should i get one to match my carb (gsxr600) or will any bike pump do?
Mitch
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MkIndy7
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| posted on 15/6/08 at 10:10 PM |
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You've given two different MPG readings for the Dizzy and the Megajolt..
How well is the Megajolt set-up?
There could be big improvements to come from there if its only got basic 2D map settings in it.
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mitch2b
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| posted on 16/6/08 at 05:29 AM |
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it does need fine tuning, anyone got a decent map there happy with? i could try out.
expected more on dizzy to though, it was tuned on the dizzy,
just ordered a lambda bung for ex,
friend has a box of tricks that can see when/where its fuelings at.
mitch
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DarrenW
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| posted on 16/6/08 at 09:07 AM |
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Ive never checked consumption after putting the bike carbs on but im sure its no worse than the 38DGAS i was using before and that got 24 ish on a
run.
As Jacko says - im expecting around 30 tops on the run to Newark next weekend.
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