![]() ![]() If it's such an increasing dilemma maybe I should jet up for the ethanol blend.Īs far as floats go. I'll try the 52/145/220 and see what happens. My choices are 76 Union, Chevron or Valero (BP). I've had to up jets on nearly every carb combo, including the stock Solexes. They are the only ones I know of that aren't using an Ethanol blend yet, though California's 5.7% minimum mandate in 2004 may have changed even that holdout. Next time go fill up with exxon/mobil fuel and watch it change. To 145 and go with something like a 260 air. So I'm guessing I need to maybe bump up the main So, I took John's advice and pulled the air jets out completely. Last edited by Hella-Buggin' on Thu 5:37 pm edited 1 time in total ![]() Would it be correct to assume that a larger air would helpīring in the mains earlier to help with the transition as well So based on the playing around I've done so far, starts at 11 then evens out at about 13.2 Good articles on transition and float settings-keep working on it. F-7s give more low and mid range enrichment.ġ9cc turbo, all under the decklid and 400+ rwhp, street driven!ġ957 Oval window Rag, Cover car, summer issue Volksamerica Magazine If you have F-11s in there now, thats probably your problem. Usually I end up with F-7 tubes in dual 40 IDF setups. Look in the Weber book, they are all broken down. Different tubes give enrichment at different rpms. What emmulsion tubes are you running? If you cant get the power band smooth, you may need a different emmulsion tube. I'd hat to have to put the 52's back in because it's such a PITA to pull the carbs but if you all agree that's what needs to be done I'll do it. Some move it around slightly in the rpm range and some are undriveable but all result in a compromise. Nothing seems to help that flat spot with the 52 idles. I've tried every jet combo from 125-160 mains and 180 -22- airs and float levels from 11.5 down to 9mm. I had the 52 idles in and have tried every combination to try and get rid of this damn flat spot in the transition, which I at least now know is due to a lean condition. I have been trying to get this thing properly jetted forever. With pulled and plugged vacuum timed at 30 degrees. I should also note that I'm running a SVDA Send me an e-mail to john at aircooled dot netĪnd get a 5% off code for use on one order for VW Parts ON OUR PARTS STORE WEBSITE, Please do NOT send me Private Messages through the Samba PM System (I will not see them). It's just advice, do whatever you want with it! You may be able to get away with 50s or even 47s if you get the mains working properly. Even take the airs OUT (effectively making them 300s) to see what it does. You may need 210 or even 220 airs to help this out. Keep the 52s in there and play with the airs. Posted: Wed 9:11 pm Post subject: Re: Wideband Resultsĭon't try to "solve" the transition problem by making it too rich at low throttle settings (bigger idle jet). At partial throttle it is fine to have 15-17 AF readings. Then download the log with the software on Probably want high12's, low 13's across the graph at wide open throttle. As Eric suggested get on an onramp and put the car in 3rd and hit the record button and then go to full throttle and record the session all the way up. You have to remember something: Everybody pities the weak Jealousy you have to earn.ĭo you have a log to post? John is helpful with reading these. Jet for full throttle, let it go where it wants everywhere else. Up to 2000-2500 rpm is the idle jet, from there, up to 4500-ish is the main, and above that is the air jet. ![]() Have someone watch the a/f meter and the tach to see when it runs richer or leaner and change the appropriate jet. I put it in third gear and take it from idle all the way up (on a deserted road, or a freeway onramp). Jet your engine to run at 12.75:1 at Wide open throttle. Jet for that, and you'll be fine through the rest of the driving scenario's.Īt part throttle, doing a light cruise, 16 to 17:1 on the gauge is normal. Do not attempt to jet the engine anywhere else otherwise you'll shoot yourself in the foot when you do go to full throttle.įull throttle is your worst case scenario. Jet the engine at wide open throttle only. You're not "leaning out" at 1/2 throttle. Posted: Wed 5:58 pm Post subject: Re: Wideband Results I was thinking of increasing the Air Jet up to about 210Īnd seeing if that leans out the WOT & also brings in the mainsĪ little earlier to smooth out the idle/main transition. Under full throttle, richened back up to 11-12. Started to lean out around 3200 at about 1/2 throttle 14.7-15.5 Popped and bucked starting around 2500Īction taken: increased Idle jets to 55's So I just rented the Wideband A/F monitor form AC.net Posted: Wed 5:47 pm Post subject: Wideband Results Quick sort: Show newest posts on top | Show oldest posts on top ![]()
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