i'm gettin a savvy 25 soon and iam tryin to get find out as much info about them as i can.i was looking at savge-central.com. i came across a forum talking about the tank leaning out as the tank is half empty?has this happened to any1 here
i have an older tank or something. coz mine aint lean out.. and the
previous owner races buggies.. so he would know about if its lean.. and
he said he never had a problem!.. so i dunno if its just me not
realising.. or its an older tank!???
.. still dual tank mod = cheap.. so might as well!.. i will probably do it when i order parts from over seas..
Whether you are noticing its leaning process or not, its happening and theres nothing you can say that will change that. It's been proven by over 2000 members minimum on www.savage-central.com, HPI has also found it to be an issue.
The +'s of the Duel Tank Mod are:
Longer run times.
No Leaning Out.
The -'s of the Duel Tank Mod are:
Some people think it looks ugly.
You might not be noticing it because of these two possible reasons:
1. Your a Nitro Newbie, and cannot see/hear/tell that its doing it.
2. Your running rich, so when it leans out its still rich enough for you not to notice it.
If your truck runs at about 250F - 270F after about 15 - 20 minutes of running higher speeds, then as it leans out it will hit about 300F and you will easily notice it.
Although if your running at about 210F - 230F (Lower Temps), then it will only lean out to around 250F or so. Therefore its not as noticable.Edited by: Star Guitar
The 25 RTR tank has alleviated the majority of the leaning issues. On the 21's the pickup was on the front of the tank - yeah like that's gunna work - and it leaked nicely thanks to the primer. Everytime you acceleratedafter the 1/2 tank mark, the fuel rushed away from the pickup.
The dual tank mod was designed to assist or the poor old 21 owners, but is not as essential for those with the non primer, rear pickup 25 tank.
I have a different view to Star on where it starts to lean out though. On the 25 I think it is probably about the last 1/8 of the tank. Anytank where the fuel can slosh around will start to draw air into the line towards the last portion of the tank. Thats why the header tank, which basically remains full for the duration of the run, prevents this.
I have not done the dual tank mod and do not suffer from noticable leaning on my truck.
When you say the last 1/8 of the tank, i totally agree with you, but by saying around the 3/4 mark, its making it a more general area because not everyones will lean at the EXACT same point as other peoples trucks. 3/4 of the tank is just a general starting point to where it leans out.