big_klemo

iTrader: (10)

I am undecied on what mill to try next I currently run a rb motors and want to try something else for my jammin buggy I have narrowed it down between the GRP tuned 21 and the OS speed 21 but I can't make a decision I heard good and bad stories about both the price doesn't effect anything some say that the os is a 2-3 gallon motor and the grp is 10-12 gallon motor your opinions would help thank you

sonyb

iTrader: (1)

I own both engines, talking about lifespan of engine its all up to you.....
If you take good care of your engine...cleaning and maintenance and you dont overrun it, you will a got more gallon on it....

for overall performance OS speed..

the GRP motors need improvement in bottom punch...in mid and high its awesome....

www.MyRCspace.net my personal website:

GH Racing

iTrader: (3)

I would suggest the OS speed 21

Steve Walters

iTrader: (1)

OS Speed....

BTW they last longer then 2-3 gallons..

1RC_ROOKIE

Im not really familiar with the GRP.

I run a OS Speed, and thats what i recommend.

jpz_67

iTrader: (57)

If price is not an issue then hands down choose the speed. Very powerful but smooth engine. I am not impressed by what I have seen in my region from the grp engines.

TRArena

i've used both and if there wasn't such a killer deal on the tuned grp with pipe then i'd prob recommend the OS Speed.... i've seen the tuned grp with pipe package for $310 odd + freight which, unless price is not an issue at all, makes it pretty tough not to go with the grp... and regardless of what has transpired with Mr Maifield the GRP seems a quality mill... if you decide to go that way just remember to keep your tuning adjustments aimed more at the LSN than the HSN and run a P3 plug.

1RC_ROOKIE

If you decide to go that way just remember to keep your tuning adjustments aimed more at the LSN than the HSN and run a P3 plug.

I just got a OS Speed still in the box, its my first turbo plug motor.Why would it be more important to tune more with the LSN instead of the HSN?? does that aplly to most all the turbo plug engines or just the GRP??

F-1

GRP!

big_klemo

iTrader: (10)

Thanks for your opinions I got the os speed, i got just about a half of gallon on it and it rips, lots of bottom end power and the top seems good too, I was running the os2060 pipe and I switched to a dymanite086 pipe it seemed to help with the top end

lowey79

I thought the 2060 was a top end pipe anyway?.... i could be wrong?