What are the correct jets for a vw 2L 8V engine with weber 40 side drafts
hi. i have a vw 2L 8V engine (stock standard) and i have a set of weber 40 side drafts on it. i please need to know what are the...
VW what car?
no model, no year,
are these custom carbs? if yes, NO ONE CAN answer that.
Jets are tuned for YOUR engine alone.
if all this is true,then get the weber book, huh? and read it.
it tells you how to tune any weber, and its not simple. not at all
the webers are the most difficult to tune but on the other hand they are the best. (less compromise , makes great racing carbs).
there are on line weber tunning pages, why not google that.
in the old days, we'd use spark plug readings for full week end (wasted ) to tune any custom carb,,
fast forward, 21st century, we have nice wide bad 0xy sensor tool.
its about, $150 now.
we put a 02 exhaust bug on the exhaust headers, (both if v8)
and we tune the carb. using this tool , in about 1hour.
way less for only idle , idle is very simple NO ENGINE LOAD.
I set it to stoich and drive.
end story, unless , issues driving or up hills.
on stock carbs the idle has a mixture screw.
we set it to max RPM and the unscrew 1/2 turn (rich)
not all carbs some use an air screw. (backwards)
contrats, the most complex question ever asked on fixya.
join a car forum for your car, then find custom carb section
then ask there. bingo,, must maybe 1 other person did this.
but i can tell you if the engine is different , with custom exhaust
all the tuning must be done over.
eg: custom cam, milled heads, exhaust, bored cylinders. or ported inakes. all change DEMAND for fuel and must be tuned to match it.
same is true with EFI. (speed density) but not air density EFI.
Jun 17, 2014 |
Volkswagen Cars & Trucks