How would a SSD weber work with auto trans?

[jpavlack]

Not sure if its been tried yet but what would be the issues involved in adapting a single side draft Weber to an automatic transmission. I'm speaking 1.9l-2.2l of course. I believe a side draft carb is much better than downdraft on these cars, and would probably give better driveability.

[madhatterpdc]

The sidedraft carbs are certainly easier work on. The SSD config has the additional advantage of shared plenum versus individual runner for DSD, something I hadn't even considered when I first heard of SSD's. This allows for better idle and off-idle response due to the fact that there is a more consistent vacuum pressure across the intake runners, whereas the individual intake runners of a DSD do not share an intake plenum, and therefore you get vacuum pulses at the carb throat. This is great for higher rpm's but not so great at lower rpm's.

Now that I have strayed from your original question far enough... the only issue that you will probably have to deal with when working with an automatic, is if there is a kick-down cable. I am not familar with the automatics so I can't be anymore specific than that.

[greensmurf20]

if i remember correctly the auto i had, the kickdown cable operated off of the throttle linkage right where it comes through the footbox, but there was anaditional vacuum line for the trans that hooked into the intake. if there was a easy way to run the vacuum line, and keep the stock style linkage it would probably be fairly easy swap.

[madhatterpdc]

It's easy enough to drill, tap and fit a vacuum line in an appropriate location, but I'm willing to bet the linkage will take some concerted ingenuity... a perfect opportunity to work on those fabrication skills.

[David McCollam]

The transmission downshift cable is connected to the linkage at the firewall and there is a stop that holds the cable. There is a vacuum line connected to the tee fitting on the intake manifold where the brake booster hose attaches. The fitting of an SSD to an engine backed by an automatic is no more problematic than with a manual. The jetting might be different based on the performance of an automatic, but the difference in fitting of the carb is of no conseqence.

Good luck.

[tekenaar]

Originally Posted by madhatterpdc It's easy enough to drill, tap and fit a vacuum line in an appropriate location, but I'm willing to bet the linkage will take some concerted ingenuity... a perfect opportunity to work on those fabrication skills.

Here's my SSD linkage fabrication. Been in for about two years . . . no problems. Spend the time to do it right the very first time!