260pos Posted December 23, 2006 Share Posted December 23, 2006 Ok, so I’m going to show off my lack of knowledge! SU’s. Might as well be Greek. My car runs like cr@p, but it does run. It idles fairly smooth, but has such a huge flatspot coming off idle, I have to feather the throttle to get it to accelerate. Last night I was out freezing in the garage smoking, I decided to pull the air filter off. (I know, I’ve had the car for three months now, and I haven’t even done this yet, I suck!) I stuck my finger in the front carb and the slide? (looks like a motorcycle carb) lifts about 3/8’s of an inch, go to the rear and it lifts about 7/8’s of a inch (before any resistance, both slides will lift all the way up). This can’t be normal! How do I “rough†adjust these carbs? Or is my motor just that jacked that they are synched like this? The motor cranks steady, so the compression must be close, and I sprayed a can of carb cleaner around looking for vacuum leaks, and fixed a few. No dramatic change. Quote Link to comment Share on other sites More sharing options...
OlderThanMe Posted December 23, 2006 Share Posted December 23, 2006 unscrew the little plastic things on top of the carbs and see if the little dipstick thing has any oil on it. If not then get some Marvel Mystery oil and fill it up... BTW do you have round top or flat top SUs? Quote Link to comment Share on other sites More sharing options...
e_racer1999 Posted December 23, 2006 Share Posted December 23, 2006 ztherapy.com has some very useful vids on SUs. good purchase. Quote Link to comment Share on other sites More sharing options...
260pos Posted December 23, 2006 Author Share Posted December 23, 2006 AH! The front carb has oil up to the first line, the rear carb doesn't! dang newbie... Marvel Mystery oil eh? Sounds fitting with my SU experiance! How do i drain the old mystery fluid out, as what is in there is a mystery (30 wt, atf, dog urine- Who knows?) Quote Link to comment Share on other sites More sharing options...
260pos Posted December 23, 2006 Author Share Posted December 23, 2006 Oh, as far as carbs, I think I have round tops. I havent been able to find a photo of Z flat tops yet, but I did see a photo of a single SU on an A12 that looked very wierd (like a coffee can), I'm guessing that is what a flat top is. Quote Link to comment Share on other sites More sharing options...
Dtsnlvrs Posted December 23, 2006 Share Posted December 23, 2006 Gimme a call, ph no's in PM i sent, I will be in the garage for the day, but can come down and take a look at it to see what we need to do to get it right Quote Link to comment Share on other sites More sharing options...
e_racer1999 Posted December 23, 2006 Share Posted December 23, 2006 the old oil isn't harming anything; it's just there to slow the rise of the piston inside the carb. FWIW i've always used 20W oil (or in a pinch 10W30), but i don't recommend ATF. haven't had much experience with MMO tho. Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.