r u guys modding these engines or running them straight out of the box?

you can run it right out the box i did

I was reading through the thread and saw this...I thought I would share my method.

Take the motor out of the ride and remove the pipe...grab the flywheel in your fingers and put the exhaust port up near your ear and turn the flywheel over ....as the compression builds up near top dead center if you hear a hissssssing sound coming out of the exhaust you have what is called "leak down"...a little is okay but a lot means it's on its way out...

usually a small short hiss will be audible at first but as the piston climbs up in the sleeve the hiss stops...that is good....if the hiss continues all the way through the compression stroke that is bad...

If you think it's wore out then pull the sleeve and check it for scratches...if you dont have any scratches you can send it off to CEO or OSRocket to get the sleeve "pinched" to get some more life from the motor....or buy a new p/s

Im really liking this engine, Ran mine last week, I put a ninja jx p3 plug in it and it runs great. Makes great power and it has the best runtime of any engine I have ever had. If I had to guess, I would think Im getting around 8 or 9 minutes.

I too am using the GRP.21 pro engine in my Revo PE this year.. paid 420.00 at my lhs.. great engine.. nice idle, excelent run time...would'nt be afraid to go 10+ minutes if needed.. easy to tune.and reliable..run temps from 200 to 280..same results every time..only coplaint.that hat is too small what about us fat head old farts???

aren't you in the wrong thread? you better chase down rody!

I knew of a guy that ran one but he was really good. There is a place that all they do is sell ninja carbs LOL.If you miss the race over this I'll loan you mine Grouchy.

does anyone know if the idrc carb inserts will fit the grp

Brian, I do not believe the taper is the same at the bottom of the insert. Send an email to Ralph..

Anyone run the Losi RE10 pipe on the GRP yet...if so, how does it work?

thanks man ...ya as long as it comes with the 6,7,8, like everyones talking about i should be fine ...ive just ended up with a couple of idrc's and they seem to work really well ....thanks buddy and i still got your 10 spot

No prob...If it's a promo kit, it will come with 3 restrictors.

yeh it is ...really cant wait to get it ...but i do the supersaver shipping from amain ...probably gonna pick up a jx as well ...maybe for xmas

What Turbo glow plugs will fits the .21 other than the GRPs?

p3,p4. o.s.