Links on modifying an engine

[mjime714]

I have an old HPI engine I want to fu@k up. Anyone know any good links on how to modify the sleeve rod and crank?

Thanks

 

[NCNitro]

I have this one for porting a TRX engine, it may help with the HPI too.


Engine Porting

 

[mjime714]

Here you go, I found a more general one. Has anyone attempted to modify an engine? I have some questions before I thrash this little HPI one.

 

[NCNitro]

Thanks for that link. :thumbsup:

 

[mjime714]

No problem, you plan on modifying an engine?

 

[NCNitro]

Yep, I have an extra TRX pro 15 I am going to port. I just did one for a friend of mine following the other article. I have not run it yet so I dont want to mess mine up until I see if I did it right on his first, lol. It looked really nice, no "accidents" thankfully, so I am sending it back to him so he can test my port job, then I'll do mine.

 

[mjime714]

Did you work the sleeve? I am curious if you grind the channels for all the ports or just the exhaust? Also, what attachments on the dremel did you use to do the grinding?

 

[NCNitro]

Yes I did the sleeve too. I did not do the rod though. I have 6 different grinding bits, and a complete polishing kit too. Everything went really well, it all looks good, I can't wait to see if it performs as good as it looks. I would try it myself but it needs the flywheel, cone washer, clutch nut and clutch and clutch bell. I really don't want to pull my other TRX apart just to try this one. I will let my buddy do that. He has the rest of the parts at his house in Florida.

 

[mjime714]

Sweet. Let me know how it runs!

 

[mjime714]

NC, did you ever get to see how your modified engine runs?

 

[NCNitro]

No, unfortunately I have not. I haven't been able to get ahold of my buddy in Florida for a few weeks now I hope everything is ok with him. I may just have to pull the parts off my other Pro .15 and see how it runs. I am dying to know!

 

[mjime714]

I'm taking the dremel to an HPI SS this weekend. I already drew out all my cuts, now I just got to start grinding.

 

[NCNitro]

I am definately interested in hearing how it goes. Let me know how you make out with it. I am dying to find out how well my port job went on the Pro 15. He better call me soon or his mill will be in one of my trucks, lol.

 

[Çh®i§tiªñ]

Can I still get a new piston and sleeve for a TRX Pro .15 ? If so, I may try a port job myself.

Anyone?

 

[mjime714]

I dont see why not. Hobby People have it in stock. I suggest you get the crank also. That needs some work also.

 

[NCNitro]

Yeah, but if you mess up the case Christian there is no turning back.

 

[Çh®i§tiªñ]

Thats ok - The mill is roasted anyhow. Of course, I could send it in on the trade-in program and get a 2.5.

Hmmmm....

Thanks for the link Mjime'

 

[NCNitro]

Thats what I plan on doing with my other Pro 15, as soon as its toast I will trade it in for the 2.5

Do the case before you buy a new piston and sleeve, this way if you screw it up you haven't wasted the money on the other parts. If it goes well then get the piston and sleeve.

 

[RobH]

i read something saying if you're going to port an engine to port a good one as porting puts a lot of stress on the internal parts and a cheaper engine breaks under the stress.

-rob

 

[mjime714]

You just have to make sure you dont over do it. Too much on any engine will cause havoc. Good looking out NoviceRob!