ThePog Posted April 5 Share Posted April 5 Now I have a real wideband in the wee Fiat and it is telling me that the old girl is running pretty rich I probably want to give the tuning a tweak. Does anyone have a solid supplier at reasonable prices for jets etc? I recall I bought a few from overseas somewhere when I first tuned it up and they were pretty reasonable. Any leads or websites? Quote Link to comment Share on other sites More sharing options...
GregT Posted April 5 Share Posted April 5 Palmside in ChCh would be worth an email. Quote Link to comment Share on other sites More sharing options...
shrike Posted April 5 Share Posted April 5 Aliexpress and Temu have jets for sale at reasonable pricing Quote Link to comment Share on other sites More sharing options...
ThePog Posted April 5 Author Share Posted April 5 1 hour ago, shrike said: Aliexpress and Temu have jets for sale at reasonable pricing Yea I had a look on AliX, might take a punt. Quote Link to comment Share on other sites More sharing options...
azzurro Posted April 5 Share Posted April 5 getting a bunch of sizes wont be that cheap even from aliex? Even scooter jets arnt that cheap a set of jet drills and some solder would be cheaper once you know the size you need Dellorto.co.uk Carbparts.eu 2 Quote Link to comment Share on other sites More sharing options...
ThePog Posted April 5 Author Share Posted April 5 7 hours ago, azzurro said: getting a bunch of sizes wont be that cheap even from aliex? Even scooter jets arnt that cheap a set of jet drills and some solder would be cheaper once you know the size you need Dellorto.co.uk Carbparts.eu I am pretty sure I drilled the ones that are in there and still have the drills and chuck somewhere. i kindof need to find out what is in there first anyway, then make a call on the sizes I will go for... 1 Quote Link to comment Share on other sites More sharing options...
NickJ Posted April 7 Share Posted April 7 I recently brought a ER16 collet chuck for the router so it can fit 1/8" shank microdrills Buy a second to hold the jet and you'd be able to overkill the job without risk of breaking drills or needing good eyesight. 1 Quote Link to comment Share on other sites More sharing options...
ThePog Posted April 11 Author Share Posted April 11 I have had a look to see what I have; Idle jet = 45 Air Corrector = 180 but measures 200 (I know I drilled something out previously, this must be it) Emulsion tube = F30 Main Jet =125 I will have to do some testing, the idle jet controls things up to about 3000 revs, after that the mains. This makes sense as there is a transition about then that is pretty noticeable. Ill tootle around below 3k and see what the AFR's are like, then up high. It seems pretty rich up there so maybe taking out the airs to 220? I found all the info I had gathered when i set the carbs up including as many setups as i could find, and interestingly a 125/130 mains seems to be the go along with a 200 air corrector, so i am not sure why mine would be so rich. Would the emulsion tube affect this? Most setups tend to an F24 emulsion vs my F30. So many questions. Quote Link to comment Share on other sites More sharing options...
azzurro Posted April 12 Share Posted April 12 I like this guys whiteboard explanation (skip to 5.42) After watching that listening to David Vizard blab on makes a bit more sense 2 1 Quote Link to comment Share on other sites More sharing options...
ThePog Posted April 12 Author Share Posted April 12 Oh man I have some embarrassing shit to divulge. I talked to Palmside today about getting some jets and during the conversation I mentioned that it was running rich and that it was weird cos making the air corrector bigger would make them much bigger than most of the setups specs I had collected. The dude asked me what I had seen on the AFR so far and I said like 16 or so. He said that that is lean..... And of course I actually thought about that for more than two seconds which is longer than I ever had, and fucking of course that is lean... What a cunt I am, I obviously had some preconceived notions and hadn't actually thought about what that reading meant. Oh man I can never talk to Palmside again, the dude clearly and rightly thought I was a fucking idiot. So having gone through that self slapdown I will probably put some smaller air correction jets in, and maybe some bigger idle jets. 3 3 3 Quote Link to comment Share on other sites More sharing options...
ThePog Posted April 13 Author Share Posted April 13 So anyway I did a bit of testing. At idle I have tweaked the mixes to give about 13:1. The idle circuit (which controls things up to about 3000rpm) is basically running at 12:1. So could probably do with a lean out. Running at higher revs is a bit leaner, it moves around a bit but is basically sitting at 13-14. Any acceleration at all gives a little bit of hesitation and when it picks up it leans it out to 15.5 or 16. I have not checked the float levels, but I found some info on the right height, so I'll probably dick with this a little bit to make sure there is enough fuel to feed the accelerator pump etc.. Slowly getting my head into it properly now 4 Quote Link to comment Share on other sites More sharing options...
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