weber 38/38 jetting

[plape]

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!

[TobyB]

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

[lip277]

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. :-)

[Poon]

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

[wagnerf15]

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

[Poon]

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.