T-Maxx 3.3 Idle and Tuning

[DirtRider045]

Thats the trx series of engines for ya! I had the same problem until I switched over to the dynamite .19t and its way easier to tune!

 

[cwal1774]

Really? I've never had a problem getting a 3.3 to tune. Or any trx engine for that matter.

 

[StevoRevo]

I'm starting to feel that way about TRX's but then i keep thinking maybe my tuning skills are not that good yet...??

 

[cwal1774]

What's it doing? How's it acting?

 

[jamaldo22]

All my setting messed up on my t maxx 3.3 I need help setting it back can anybody walk me tru. The steps

 

[Metalhead Matt]

4 turns out on the hsn. 2 turns out on the lsn. Thread the needles in all the way, but do not tighten them.

 

[vmswimfan21]

traxxas tmaxx
"I was having that same exact problem you want to know what it was, it was a air leak I took it to my lhs (local hobby store) and they tuned it for me and it was running fine until I took it into the sand, and the cooling fins got kuncked up and it was pushing 340. So I shut it off brot it home sprayed them off with the air compresser cleaned the hole truck tuned it and I had it running 240-250 again. Then the temp outside got hot so my truck got hot to and it wouldn't keep a tune so I shut it so what I'm saying is if it is like 80-85 degrees Farienhiet they dont run good or if you have and air leak they won't run good."

i live in iowa and 85 in the summer is cool and my truck runs great

 

[keithevans54]

i think everyone has a little trouble with tunning the carbs at first till they get the hang of it. once you get a feel for your truck and learn what it can and can't do, youll no when its tunned right, and youll no when its a little out.

 

[mrbones]

Hey Tdog, just ignore Jerry. He had to say something like that because he didn't have an intelligent reply to your question. The 3.3 motor seems to idle high while winding down for some reason. I have 2 of them and they both do that. You might need to seal up you motor and then start tuning. Start over to factory settings. I think they are LSN flush with the end of the housing and the HSN will be between 4 to 5 turns out. Do the pinch test and get it close. Put it out there and run it and get your HSN close. Then go back and do the pinch test again. Your air gap in the carb should be about 1mm.

 

[SC-REVO]

I really don't have an issue anymore with the 3.3 carb. I think everyone has good advice, and it works. I set HSN/LSN to factory spec (not running). Then I set the idle by using the radio in brake position and get my paper clip gap. Then I start it by slightly tapping the resonator end (not fully covering). You really dont want to flood. When it cranks and idles good (adjust if needed) I will run it around until warm (no wot) and I listen and look at smoke when doing throttle pulls. Adjust it. Then do WOT runs, listen, look and pay attention to 2nd gear. Then I will fuel line pinch to make sure it idles up before it turns off. Then I repeat to ensure HSN is good and slightly adjust LSN. Then bash it. (If it doesn't want to crank after setting idle, turn over and slightly lean HSN until it cranks) good luck


"It's more than a hobby...it's an addiction!"

 

[moe7404]

i have found you can run a 3,3 at a idle some higher than stock as long as it doesn't pull the car at idle. it gives you a better throttle response.