How can I tell if I have half tank lean problem?

[hevi99]

Sorry to sound like a newbie, lol. I bought my x 4.6 about a month ago, First HPI vehicle and I love it.

I have the stock 4.6 with a THS exhaust so far I haven't had any problems. I picked up the new era 125cc tank mod from my LHS, it was in the "bargin bin" for $10, but I haven't installed it yet, cause I haven't noticed any issues that would make me think I have the half tank lean problem. From reading I think it's safe to assume it happens with every Savage cause of the tank design. My truck seems to run fine through a entire tank of fuel. Temps usually range from 230-250, I check it often while bashing. So far the trucks held a great tune, way better then my Jato 3.3, lol.

So i'm basically asking what the symptoms are for the HTL issue?

 

[chimeraxp]

when you reach the lower half of the tank this is when you will see your truck start to lean out , you can tell either by sound, smoke or temperature increase .
what a most do to avoid the HTL is to run a richer setting then they aren't hurting the motor at all . by the sounds of things your not running a really lean truck so you will be fine , I know my one truck I noticed it more I have a mid tank done to it , my sts truck I can tell right away when it's half tank by sound and the wasp truck I haven't noticed it at all.

 

[frddyj]

when you reach the lower half of the tank this is when you will see your truck start to lean out , you can tell either by sound, smoke or temperature increase .

+1.

when my sav had the stock motor in it i added a THS 8025 and it developed a wicked htl. Sound and lack of smoke is a dead give-a-way. it also increased in power and temp due to the increase of air lack of fuel.

:slayer:

 

[Meatwad]

yep increase in power towards the end of the tank is how i came to notice it. then after reading more about it started to check temps and sure enough...

 

[Pikester]

I've been beating my head against the wall wondering what the heck my problem was. I dial my tune in every time i start to run and wondered why it seems to lean out after awhile. So now I believe I know the problem.

Do you think raising the tank would fix this? Or is it a tank design problem and the sloshing around of fuel is causeing air to mix with the fuel? (The HPI Proceed had that problem.) I believe I could raise the tank at it's present location. Has anyone tried that? I would hate to waist my time if it is already known not to work. I'm lazy!!