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Westfield_XI
Jedi Warrior
Offline
I just wanted to post up some information for those who are running a Weber carb. After many years of development a totally new approach to tuning has been released. I had all the typical troubles of too rich mid range, off idle stumble and WOT leaning that nothing could fix. I could eliminate one of the problems, but never all of them until I started following this Yahoo group:
https://autos.groups.yahoo.com/group/sidedraft_central/messages?o=1
I installed the new type idle jets and adjustable holders and was able to tune both the idle at 1000 rpm and the transition to the main circuit perfectly. These idle jets have 4 different settings that allow you to set the mixture from leaner at 1000 and richer at 1/3 throttle where you transition to the main circuit to richer at 1000 and leaner at 1/3 throttle, with 2 more intermediate settings. I have an AFR on my car and am able to see the improvement in the mixture on the gauge, to say nothing of the way the car drives.
After having such success with the idle jets, I volunteered to be a guinea pig to test new style emulsion tubes and air correctors. I still have more testing to do, but so far the improvement is astounding. With the best dyno tuned setup, my AFRs were starting at 10.2 at 1/2 throttle and ending up at 14.5 at WOT. Typical Weber leaning behavior. Now I start at 11.9 to 12.2 and end up at 13.3, I went from a 150 weber main jet that gave a 14.5 WOT mixture to a 125 main jet that gives a 13.3 WOT mixture. The exhaust sounds crisper and there is no midrange fuel stink like nearly every other Weber I have been around. No matter what gear or what RPM, I can slam the throttle and is just lunges ahead, or I can gently feather it and it glides forward. Just like a modern EFI system. The idle is smooth and steady at 900 to 1000 with no lumpiness at all.
On the road the car feels like it has EFI, it pulls strongly and smoothly from below 2000 at WOT all the way up to redline and this with .286 lift scatter pattern cam with 1.5 roller rockers. At mid throttle cruise my mixture is in the mid to high 14's under light load in 5th gear. It has no flats pots or hiccoughs any where in the rev range or throttle travel under any conditions. My only complaints are that I would like to get the mixtures a point leaner and I have a set of 120 and 115 jets coming to try that, and a bit flatter and we are working on another version of the emulsion tube for that issue.
I do not expect anyone to believe me alone and would just ask that those with an interest go to the Yahoo sidedraftcentral group and read a few posts about the development process and some of the posts by other users. This is not just another jet recipe, the parts look radically different from the stock ones. Pictures are on the web store page. I have no financial interest, I'm testing this on the A-series, but I have to pay full price, just like anyone else. I am doing this simply to get a carb that works as well as my 2010 model car does.
https://autos.groups.yahoo.com/group/sidedraft_central/messages?o=1
I installed the new type idle jets and adjustable holders and was able to tune both the idle at 1000 rpm and the transition to the main circuit perfectly. These idle jets have 4 different settings that allow you to set the mixture from leaner at 1000 and richer at 1/3 throttle where you transition to the main circuit to richer at 1000 and leaner at 1/3 throttle, with 2 more intermediate settings. I have an AFR on my car and am able to see the improvement in the mixture on the gauge, to say nothing of the way the car drives.
After having such success with the idle jets, I volunteered to be a guinea pig to test new style emulsion tubes and air correctors. I still have more testing to do, but so far the improvement is astounding. With the best dyno tuned setup, my AFRs were starting at 10.2 at 1/2 throttle and ending up at 14.5 at WOT. Typical Weber leaning behavior. Now I start at 11.9 to 12.2 and end up at 13.3, I went from a 150 weber main jet that gave a 14.5 WOT mixture to a 125 main jet that gives a 13.3 WOT mixture. The exhaust sounds crisper and there is no midrange fuel stink like nearly every other Weber I have been around. No matter what gear or what RPM, I can slam the throttle and is just lunges ahead, or I can gently feather it and it glides forward. Just like a modern EFI system. The idle is smooth and steady at 900 to 1000 with no lumpiness at all.
On the road the car feels like it has EFI, it pulls strongly and smoothly from below 2000 at WOT all the way up to redline and this with .286 lift scatter pattern cam with 1.5 roller rockers. At mid throttle cruise my mixture is in the mid to high 14's under light load in 5th gear. It has no flats pots or hiccoughs any where in the rev range or throttle travel under any conditions. My only complaints are that I would like to get the mixtures a point leaner and I have a set of 120 and 115 jets coming to try that, and a bit flatter and we are working on another version of the emulsion tube for that issue.
I do not expect anyone to believe me alone and would just ask that those with an interest go to the Yahoo sidedraftcentral group and read a few posts about the development process and some of the posts by other users. This is not just another jet recipe, the parts look radically different from the stock ones. Pictures are on the web store page. I have no financial interest, I'm testing this on the A-series, but I have to pay full price, just like anyone else. I am doing this simply to get a carb that works as well as my 2010 model car does.
