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#11 Re: A12 turbo wont rev
DAT012 Posted on: 2010/2/23 10:44
ssskiwi - engine was running fine before adding the turbo, i have not used this particular carby before but i stripped and rebuilt it just to be sure it was all good. I have also played with ignition timing (was also working fine before) and it seems to make slight difference when advancing it but not a great deal, also it is running a std points dizzy so weak spark could be a possibility


#12 Re: A12 turbo wont rev
supafatto Posted on: 2010/2/23 10:48
wat jetting in the 32/36?? has it been changed for a series??


#13 Re: A12 turbo wont rev
DAT012 Posted on: 2010/2/23 10:55
The jetting has been changed to suit a series but i dont think it makes any difference, by rights the engine should rev either way it will just be very rich or lean


#14 Re: A12 turbo wont rev
supafatto Posted on: 2010/2/23 10:58
the last time i had a problem wit no rev was carbi wasnt tuned and timing was up the #OOPS# and #OOPS# spark, so changed to a gt40rt coil and had TOMOZ tune and dial in my carbi and ran soooo much better and heaps more rev


#15 Re: A12 turbo wont rev
ssskiwi Posted on: 2010/2/23 11:07
When you say you can see the fuel squirting into the primary throat, are you sure that is not just the accelerator pump and the primary circuit is actually not working? Would think that you should only see a mist from the primary venturi not a squirt.
Will idle because the idle circuit is seperate circuit but when you crack the throttle it will lean out as the accel pump shot dies out?
It still does the same thing when the turbo is removed from the equation, lid removed from carby, etc?


#16 Re: A12 turbo wont rev
DAT012 Posted on: 2010/2/23 11:12
good point about the primary circuit not working, what could cause this? I have checked the jets arent blocked. The problem still occurs with the carby hat off


#17 Re: A12 turbo wont rev
tommo73 Posted on: 2010/2/23 11:21
seen as the carby is the only questionable part
i would look there, even if u rebuilt it
use your hand to choke the carby while its running
and see if it revs then
sounds like lack of fuel
primarys idle jets are fine
primary main jet blocked


#18 Re: A12 turbo wont rev
andy-roo Posted on: 2010/2/23 20:32
is it just doing this wen its cold? have u let it idle to warm then rev? because mine will do that until warm i am running the same sort of setup but without the boost reference line and mine is fine only leans a little up top like 8-9g but is not properly jetted yet i had fuel problems wen i first did it with a 32/36 weber but then i changed to a 180 holley and it was fine but i believe it was just my weber


#19 Re: A12 turbo wont rev
DAT012 Posted on: 2010/2/23 20:42
I've tried it hot or cold it makes no difference, im going to try a different carby on it tonight and see what happens


#20 Re: A12 turbo wont rev
DAT012 Posted on: 2010/2/24 10:17
Changed the bottom half of the carby this arvo with one that i knew worked and this fixed the problem. Took it for a quick drive and it ran pretty sweet but it seemed fairly laggy



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