How many gallons?

[knall]

Originally Posted by Scrogg

A 3.3 will last over 4 gallons tuned correctly. Mine still had the same compression at 4 gallons as it did at 1 gallon. The key to making it last is bearings, at 4 gallons you are at the point of crankshaft vibration due to worn out bearings. After 1 gallon of fuel pull the stockers out, they are cheapos and buy some Boca bearings. Ceramics would be a plus but not necessary.
The engine will last longer, run cooler and hold a tune better with good quality bearings. I guarantee it. The TRX mills turn a LOT of RPMs, 40K on cheasy bearings is a recipe for disaster. I pushed it at 260-280 for 4 gallons on the stockers. I was surprised it lasted that long.

Got a link to the bearings?
newbies need that kinda direction LOL

[Metalhead Matt]

Just google bocca bearings. Nothin' hard about it. Know the size of your bearings? If not , google that too. Or find an exploded view of the engine.

[Racer 1966]

Originally Posted by Metalhead Matt

Just google bocca bearings. Nothin' hard about it. Know the size of your bearings? If not , google that too. Or find an exploded view of the engine.

Or just be nice and give him the link.

Boca Bearings

[Austin2048]

Geez. I've had my t maxx 2.5 for almost 5 years and I haven't replaced a single part cept a few ez start gears, glow plugs, and I replaced my first spur gear a few weeks ago. My engine is stock and it has at least 10 gallons of fuel through it and it runs fine. It's over heated a lot too

[Metalhead Matt]

Originally Posted by Racer 1966

Or just be nice and give him the link.

Boca Bearings

I'm not that hi-tech.

Originally Posted by Austin2048

Geez. I've had my t maxx 2.5 for almost 5 years and I haven't replaced a single part cept a few ez start gears, glow plugs, and I replaced my first spur gear a few weeks ago. My engine is stock and it has at least 10 gallons of fuel through it and it runs fine. It's over heated a lot too

Sometimes you get a gem. That's a 2.5 that'll be worth rebuilding.

[Austin2048]

Originally Posted by Metalhead Matt

Sometimes you get a gem. That's a 2.5 that'll be worth rebuilding.

so I shouldn't chuck it and I should just replace the piston and sleeve and cooling head? This engine isn't in bad shape. It has pretty good compression still

[Metalhead Matt]

Well, when the time comes for a rebuild, you'll have to decide if you want more power or not. All 2.5's are under powered on a Maxx. If you had a smaller vehicle and wanted to use this engine, it would probably work out well for you. With any cheap engines, you'll find ones that are more finicky than others. Yours sounds like a good one. It's really personal choice.

[trashedxj]

Originally Posted by Austin2048

so I shouldn't chuck it and I should just replace the piston and sleeve and cooling head? This engine isn't in bad shape. It has pretty good compression still

find ya a decent on road chassis or stadium truck chassis and rebuild the 2.5 and build ya a nice little runner with it, then go ahead and splurge the cash on a nice os 18 or lrp 18 and get that little more power and those motors hold tunes like nothin else! plus with that power you'll love your maxx even more! 0.02

[Austin2048]

Wow I didn't know I could do all that with my old 2.5 engine. That all sounds greatbut now I'll need a job so I can actually do it! It sounds like a great winter project. Winter is gonna be here soon so i'll need a source of income fast. It sucks bein 16 now if u r lookin for a job -.-

[Metalhead Matt]

As long as your out going and have a good attitude, you'll be able to find a job. Pizza delivery, gas station, fast food, ect... If you get a crappy job, just remember why your there. Think about your projects and nothing will seem that bad. A ruslter or stampede roller would be a nice start to a budget-friendly project. Being that these trucks are designed for the 2.5's, parts are be cheap and readily available.

[Austin2048]

Yea I've gotten that lecture plenty of times before. I guess i'll need to look harder. Maybe I'll walk home from school tomorrow and stop at every single store on the way home and see if they r hiring and make a list of all the stores hiring. Or I could try and get a job where my girlfriend works lol

those don't sound like bad chassis to start on for my first build

[drdoom405]

Maybe you should just send that engine back to Traxxas, Austin...Perhaps hey can study it and make them all like that.