other 38/38 weber on an auto

[tim385]

Has anyone replaced the solex dual throat carby with a 38/38 weber on an automatic 02.The solex is very worn (shafts) and I was thinking of this for an upgrade , the kick down cable set up might be a bit of an issue.Any thoughts? Wife likes the auto so its not getting a manual swap.

[esty]

a couple of old threads

 

http://www.bmw2002faq.com/index.php?s=d352ce57cd699e6eba5f3010e9e2c01f&app=googlecse#gsc.tab=0&gsc.q=%2038/38%20weber%20on%20an%20automatic

[Napes]

My engine is slightly modified, but I run a 38/38 Weber on my '75 automatic and it performs great.  The kickdown does not get in the way of the installation and, if correctly adjusted, does not have any ill effects on performance.  If your automatic is pretty stock you might get better results from a 32/36 carb.  That is what we run on my wife's nearly stock '76 automatic.

 

Bob Napier

 

Edited January 28, 2015 by Napes

[Slavs]

The 38/38 is a pretty bad match for an 02, especially an automatic. The 32/36 works much better. With the 38/38 your driveability is decreased; by that I mean your car's torque band becomes much narrower, and you will feel  only marginal improvement, if any, at ful throttle. You will loose a significant amount of low end. Some of the members here swear by that carb, but that is not my experience. If you want to go with a big carb set-up, go with the dual side-dtafts, buit not with an automatic. You will also see a very significant drop in mileage, from the 21-24mpg you get with the stock carb to 15-17mpg with the 38/38. A 32/36 will get you about 17-19mpg in the city. Look for a healthy stock Solex. It flows better and is matched / tuned for your car.

[Rocan]

Slavs, your comment is a bit misguided. A 38/38 is an excellent match for an m10 that has a hotter cam than stock and some supporting mods. Many people get excellent fuel mileage using that carb as well; it all depends on the tune. If anything, a 38/38 is a far better carb on a street driven car than a pair of dual 40s. I can tell you for a fact that a 32/36 can't flow enough air for even a mildly modified m10. You hit a wall at about 5000 RPM; it wants to pull further but is completely restricted. 

Edited January 29, 2015 by Rocan

[Napes]

I get about 20-22 mpg on the freeway between my home in Nogales and Tucson, a distance of 65 miles. This at 80 - 85 mph with a 38/38. Engine is newly rebuilt and well tuned. Accelerates, even with an automatic, very well.

Bob Napier

[tim385]

Bob did you use all the existing solex kickdown linkages?

[Napes]

Tim; Yes, the kick-down mechanism is not effected by going to a Weber. The kick-down connection is on the throttle rod that goes from the firewall to the back of the carb linkage. You do have to change some things at the carb connection but it's been 16 years since I did it on my wife's '76 and over 32 years since I did it on my '75 so I don't don't remember all the details. Talk to someone at Pierce Manifold and they can advise you what may be needed.

Bob Napier

[airborne85]

Hmmmm

 

It's way to early in the morning to wrap my head around what Salvs just said....

 

Me thinks Solex is a wonderful carb (single barrel). 

Me thinks a double barrel Solex is funner than a single barrel carb. 

Me thinks a 32/36 weber is a wonderful addition to the M10.

Me thinks a sync-linked 32/36 weber carb, is a great way to put a smile on your face. 

Me thinks a 38/38 weber is a great way to make your brakes smoke........

Me thinks driveabiltiy to the person that owns a 2002 with any combination of the above carbs is personal..

 

And if MPG is part of the criteria for driveability, dual carbs isn't even in the discussion.  I'm not sure most 2002 owners (at least this one) are concerned about MPG....

 

Now to me since I'm don't know or care to know all of the lingo that you used....A set of well tuned dual carbs is a wonderful wonderful experience.  However wonderful wonderful translates into low end, mid, and top end speed....That's wonderful...

 

My name is ira.....I support this message

driveability

 

 

driveability