Tony, it may be ok. How does it feel with the plug in and does it idle good? Turn it to "almost" TDC and see if the compression leaks by.


Hey guys, I run the grp .21 with a 6mm restrictor, losi 2.0 and I have been amazed with runtime. At a fairly large track I was getting 13:20 most of all day.

I went to the sidewinder and was bumping up through the 1o minute mains with no problems. Ran 11 minutes or more total and had fuel left.

What are your experiences? Even our locals easily go 9-10 minutes in buggy. I'm very impressed;)

alan thanks for the reply, With the plug in it is alot better, but I can turn the flywheel over by hand, not super free but with some effort. it idles fine since I but a o.s. p8 plug in it. The p8 is a very cold plug also. I wanna put a p3 in it. How will i know if compression is leaking at almost tdc? I know a couple of losi sponsered guys that use the 6mm restrictor and love it. I was thinkg of buying it to improve runtime as well

ok lets see if I can describe this method....

hold the engine by the flywheel in your right hand at TDC, with the head pointing "almost" straight out see if it will hold itself up or how quickly it "flops" past TDC. That should show you if it's leaking by quickly.

Make sense?

Double post

I havent gotten my motor yet but what carb restrictor come with it from the factory? I was going to order a set but wasnt sure what set I needed to get. Should I get the (5.0 5.5 6.0) or the (6.5 7.0 7.5). Burton you know the style track I run on here in central AL. I was leaning towards the 6.0 down set. And does anyone know if the Go Tech restrictors work?

http://www.amainhobbies.com/product_...ducts_id/28037
http://www.amainhobbies.com/product_...ducts_id/31195

john, did you get the promo kit or just the engine? I think my last engine came with all the restrictors in the box. But, you want the 6mm. It will have awesome power and runtime and sooooo smooth.

I'll be glad to break it in for you no charge, just get it to me.

I let full throttle bmoney run mine last weekend. You need to ask him what he thought about it. You would not believe how well he did.

I got the promo kit.

the promo kit comes with the restrictor you need. it comes with a 6.0 , 7.0 ,and a 8.0 you will absolutely love this engine before i got mine the most run time i ever had was 7 1/2 min. tops you know you've pitted for me now i can get 9 and on a good day 10 min

Apologies in advance since my question is ever-so-slightly off-topic:

does anyone know where I can get any of the GRP clothing? Their winter jackets look awesome but after hours of scouring the net, I can't for the life of me find anyone that carries it. The folks at GRP Italy were of no real help either :confused:

Awesome, thanks hixie :sweat:

Djballen....you get your engine yet? LEt me know...be more than glad to help with the break in and get her tuned in once we make it to the track...

i need to put a grp carb in one of my mr ninjas. i know it'll fit, but will it tune/work the same?

It'll tune like a Ninja with a GRP carb! LOL.

Quit breaking your carbs grouchy!

gallon 11 and still kicking :nod: