I have a 1:10 scale buggy which is fitted with .12 engine. I have been thinking about upgrading the size of the engine to a .15 or .18. I was wondering though wether this extra power might damage the stock diff. or any other parts of the car. I dont want to screw up everything on my car by putting an oversized engine in it.

Think your in the wrong forum mate. This is 1/8th

Doesnt really matter to me if your in the wrong forum or not, if you beef up the motor you are always at risk of breaking more stuff. The added power tends to put a lot more stress on things.

there isnt really a forum for non 1/8 buggies...
upping the engine usually results in twisted dogbones, diffs going out earlier and basically weaaring out your drivetrain

Thanks for the advice, I think I'll forget the idea of a bigger engine then

Don't be put off, just be aware that you need to spend money on more than just the engine.

People who bought the HPI MT (and MT2) were a bit stuck like this for a while, the HPI MT's stock drivetrain is not really up to much, but then they released the MT18SS, which is a beast with a powerful HPI .18 engine. As a result, they had to uprate the drivetrain to cope with the new powerplant, and now we have hardened steel drivetrain components available which can also be used by those with older models who want the extra power. What is the buggy, just out of interest?

It's a Ho Bao (Ofna) Pirate 10 buggy (not the MT). I'm from England and I've had a look on a website and I think you can get a steel drivetrain . The stock one is nylon or some other type of plastic. I am a bit worried about screwing the up diff. Do you think that there is a chance that this might happen. I was only thinking of upgrading to a .15

Its ok mate, I'm from england too, I just live in greece...

Can't be sure about the diff, I must say I never looked at this machine at all. I would recommend getting all the metal drivetrain parts you can, but besides, I don't think a .15 is going to cause you any problems, even the quicker ones. I assume you're going from a .12 to a .15? Get all the metal parts you can, and a good .15 engine. At least if it blows the drivetrain to pieces you have an excuse to get a better machine...and you will already have a decent engine...maybe get an HPI MT kit, they're cheap-ish and great bashers...and they're 4wd (the pirate is 2wd innit?)...

Of course, you could consider selling the pirate on ebay, and getting an MT18ss, it's only available in kit form, and you already have radio gear, obviously, and it comes with a very fast .18 engine (and a two speed, if I remember rightly). Clocked at 72 kph out of the box (nearly 45mph) and it has bags of torque compared with .12s...

The Pirate 10 is 4WD. Theres just been a review of it in one of the mags and it said that it is one of the best 1:10 buggies on the market. I got it after reading a few reviews and expected it to by quite good. I got it out the box and it looked great. Virtualy all the framework is anoized metal, its 4WD, got a hyper 12 pull start engine, the shocks are realy adjustable. I put the wheels on and took it out. I ran it in and I couldn't believe the power that the little engine was giving out. The acceleration was great, i'm not sure the actual sped that its suposed to go but i recon that it was at least going 40mph. The only reason that i am thinking about the engine upgrade is for in the future when the stock engine is worn out, or for a bit more speed fr racing.

Oh by the way you said you are from england, do you know anywhere that i can race it. Everywhere seems to only let electrics race

I thought it was quite old??! Anyway, if it is a recent design, then I'm sure you could drop a .15 in there, no problem. That guy on your other thread reckons the hyper .21 drops right in, but I'm sure you would need major drivetrain upgrades to do that. I may be wrong though. To be honest I'm gonna butt out now, and let someone who knows take over. I don't want to give you bad advice, and to be honest, I don't know anything about this buggy (I even thought the pirate was a stadium truck! LOL!). I stand by what I've said so far though...

I didn't race in england, but I went to a track in tolworth once where there used to be a racal decca, but I can't remember ANYTHING about it (I used to smoke quite a bit back then, if you know what I mean! lol!) [8D]