Jump to content
  • When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.

weber 38/38 jetting


plape

Recommended Posts

I'm about to buy a weber 38/38 for my stock motor --fresh rebuilld with E12 head, slightly higher than stock compression ratio, stock non-tii exhaust manifold--and looking for jet advice. There are a couple of suggestions in the archives but it would be nice to hear more advice/real world experience. I assume CD's prescription only works for the 32/36, correct?

I'm looking for smooth street driveability.

Thanks!

Link to comment
Share on other sites

Well, I haven't changed much since I last posted.

I seem to remember running a 135 or 140 mains,

random (160? 170?) air correctors, and farting with the

progression ("idles") to match the mains, as in, with a 140 main, I could use

a 55 or a 50,

but the 135 did better on a 60 or 65...

but it's been a few years.

t

"I learn best through painful, expensive experience, so I feel like I've gotten my money's worth." MattL

Link to comment
Share on other sites

On my car..... With 9.5:1 pistons on an otherwise stock rebuild....

I installed a 38 DGAS straight out of the box and it works great.

Would messing with the jets get me anything better? I can't say. I love it just the way it is.

I got 28mpg for a 200 mile drive a couple of years back - straight highway/freeway cruising. Have not checked since. One thing to the contrary is I do know it is not an economy car in city driving. :-)

Kevin

Seattle

1970 2800CS - 1985 728i - 2001 E38

 

Link to comment
Share on other sites

Kevin are those your only engine mods?

How does it compare to the stock set up?Is there a big difference in performance?Any drawbacks other than the fuel economy?

-Andrew Poon

IMG_5202-1-1.jpg

1976 2002 - Mintgrun

1986 535i - Bronzit

Link to comment
Share on other sites

Do you need a 38 with stock cam and head? If driveability is your goal, i don't think you can do better than a 32/36 and that thing can huff all the fuel/air your stock engine can use......IMHO

'74 2002

4224350

Ambulatory on 2/4/9!!!

Now the hard shit begins

Link to comment
Share on other sites

Right off the bat, I'd be running the 38/38 with a stahl header fed into an ansa muffler. Cam will stay stock for a while, but probably this time next year, I plan on having either a 284 or 292 schrick cam, and 9.5:1 pistons.

IMG_5202-1-1.jpg

1976 2002 - Mintgrun

1986 535i - Bronzit

Link to comment
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
  • BMW Neue Klasse - a birth of a Sports Sedan

    BMW Neue Klasse - a birth of a Sports Sedan

    Unveiling of the Neue Klasse Unveiled in 1961, BMW 1500 sedan was a revolutionary concept at the outset of the '60s. No tail fins or chrome fountains. Instead, what you got was understated and elegant, in a modern sense, exciting to drive as nearly any sports car, and yet still comfortable for four.   The elegant little sedan was an instant sensation. In the 1500, BMW not only found the long-term solution to its dire business straits but, more importantly, created an entirely new
    History of the BMW 2002 and the 02 Series

    History of the BMW 2002 and the 02 Series

    In 1966, BMW was practically unknown in the US unless you were a touring motorcycle enthusiast or had seen an Isetta given away on a quiz show.  BMW’s sales in the US that year were just 1253 cars.  Then BMW 1600-2 came to America’s shores, tripling US sales to 4564 the following year, boosted by favorable articles in the Buff Books. Car and Driver called it “the best $2500 sedan anywhere.”  Road & Track’s road test was equally enthusiastic.  Then, BMW took a cue from American manufacturers,
    The BMW 2002 Production Run

    The BMW 2002 Production Run

    BMW 02 series are like the original Volkswagen Beetles in one way (besides both being German classic cars)—throughout their long production, they all essentially look alike—at least to the uninitiated:  small, boxy, rear-wheel drive, two-door sedan.  Aficionados know better.   Not only were there three other body styles—none, unfortunately, exported to the US—but there were some significant visual and mechanical changes over their eleven-year production run.   I’ve extracted t
  • Upcoming Events

  • Supporting Vendors

×
×
  • Create New...