neon_dave

So I've had my t maxx running pretty well having to make small adjustments to tuning but it doesn't seem to blow alot of smoke but the hottest it's been it's little over 260 on a few high speed runs then it sat and idled I noticed tho when I go to run it after it sat a day or 2 it would die when I hit full throttle once it wanted up it gets better. I'm pretty sure my lsn it set correctly it idles good and shifts into reverse so that seems ok it may need a small amount of fine tuning I k of the starting point for the hsn is 4 turns out so it'll have to try again also did modify my fuel tank by opening up the outlet so it flows better. I'm not sure what exhaust is on it I got a great deal on a chassis parts bundle.

Maxximize

For the high speed a trail of smoke and power output and engine sound at above half throttle is the best way to determine if it's tuned well. It should throw a decent trail of smoke. It also shouldn't sound too high pitched or like a 4 stroke. High pitched sound means it's lean, and the 4 stroke gurgling sound is too rich. If it tries to stumble and die at full throttle it's likely too lean. If it hesitates and blows a ton of smoke it's too rich. Temperature tuning doesn't seem to work all that well most of the time and should really only be used as a reference and to make sure you're not over the top hot for running temp. 260 in my opinion is a bit too hot. I like to keep my engines below 250 max with the body on. For the Low speed, set the idle gap at about 1mm or so, I like to use a paper clip as a spacer for that. Once that is set get the engine warmed up to running temp then do the pinch test. With the truck idling just pinch the fuel tube off by the carb and wait for it to die. If it revs really high and takes a long time to die, it's too rich. If it just dies with no rpm change it's too lean. If it revs slightly higher and dies it's good. It might take a few tries to get it right but you'll learn it pretty quickly. This method will get you very close to the optimal low speed setting on any engine. If the engine won't idle with a 1mm gap, use the throttle trim to set it higher temporarily until the low end is closer to optimal.

neon_dave

Thanks for the info I'll have to try the pinch test when I get off work

Maxximize

No problem. Yea that pinch test has served me well for years now. I always set it a hair richer once it passes the pinch test just to be safe. Same with the high end, better to be a bit rich than to grenade your engine I forgot to add that you may have to use your throttle trim for temporary idle adjustments if your low end is way off. That's what I always do, set the idle gap, use the throttle trim if the truck won't run with that gap, then dial in the low end, zero the throttle trim, and pinch test again.

neon_dave

So I did the pinch test it revved up alittle bit then shut off seemed about right so I should be good on the low speed.

jkdv8

My Feedback: (1)

That sounds about right. There are some vids on YouTube for video and audio reference.

neon_dave

Thanks gonna check it out then of course as soon as I hand it running right I wrecked it and broke the chassis supports and bent some stuff I got it all fixed now but the transmission seems to be acting up or maybe the slipper clutch I'm not sure what's going on it does still run fine and shifts but seems off. Gonna switch to rpm a arms eventually since I'm running aluminum ones now although they didn't bend when I wrecked it just found the weakest link and broke that lol steering seems to bee a arms bit wierd to it doesn't go back to center anymore so gotta figure that out hope it didn't mess up my new hitech servo I'll be pissed.