need help jetting 40 webers on L18 stock

[vwben88]

i want to know what jets i should start out with for a L18 motor the motor is all stock with headers . im putting on a pair of 40 weber side drafts any help would be appreciated thanks

[Xander_42]

Well, here's that info for Mikunis, you find something like this for the Webers (and I'm sure it's somewhere) and you're set.

http://www.mikunipower.com/PHHCarbs/PHHservice29JettingChart.jpg

 

Entire booklet, and other info:

http://www.mikunipower.com/PHH01.htm

 

 

Good luck with the setup, also, as we all say: pics of ban.

 

Also, there's a thread called "Read Before Posting in "How-To". You should read it before posting in How-To, it's like four lines of writing. Not to be a dick, but it's right there.

[Xander_42]

Again, not to be a dick (okay, nvm, I'm totally meaning to be a dick):

http://lmgtfy.com/?q=weber+dcoe+jetting+guide

 

Top result is pretty good.

[Jesse C.]

Did you do a search on here to find the info? I posted a Weber chart on standard jetting for certain setups. Just do a search on here for it.

[banzai510(hainz)]

How about just bolt them up and run them first. sync them.

 

then see where your at.Usually its pretty close to drive around then adjust the timming .usaully advance timming to 12 -15 and see if that helps it.

 

Webers use a funky numbering system which doesn not correlate sometimes.

[vwben88]

thanks i did that i just thought that someone here would know the exact jetting for that motor

[datto510]

How did it run? Did you advance your timing?

[vwben88]

yea i put them onand they ran i put the timing at 15 degrees but i still have the stock vacuum advanced on the distributor can i hook that directly to the intake. my main question for the webers r what venturies should i use and emulsion tubes and air thanks

[banzai510(hainz)]

on sidedrafts the vaccum adv coemes off the carb NOT the manifold!!!!!!!!Never hook it up to the manifold.

 

OK if your carb does not have a vac port them adjust the dist to around 12-15 or what ever you can get to make it run good.

 

if car runs ok I would not worry about it cause if you want truely perfect this can cost you alot and still might not be right. just be glade you have 40s as I think they are perfect for the street.

[hang_510]

just thought that someone here would know the exact jetting for that motor

:rofl:

 

gotta decide if you want performance or mileage

 

cause if you want truely perfect this can cost you alot and still might not be right.

[banzai510(hainz)]

Dave

He had his webers adjusted by a GURU.

He spend 700$ and he said there was still a slight hesitation.

Proplem was he order parts jets then it wasnt right then order more then each time .

Not like the guy shad the whole assoremtn of jets to pick from.

 

The old Mikuni book gave a best guess statring point. Ussaully enough to drive around.

 

My mikuni 40 were based for a stock motor. Latter put a bigger cam on and match port it. I still run the same jets I cant tell if it can be jetted better or not.

[schicksal]

I think this should help you out or at least give you an idea this is for DCOE. Weber DCOE Jets

[vwben88]

thanks for everybodys help i will try to get back to the car after the rain