This weekend i was running the best lap times i have ever ran. Motor came in after warm up at 141, and after a 10 minute qualifier, at 148

there is no real date on when the 40% is actually going to take effect? I would like to know Thanks

Adam,
The Losi site describing the GRP needle settings has me confused on the LSN setting. The above pictures showing individual needles says the LSN should be .045 in from flush and the lower pictures showing the individual engines, say the LSN should be .045 out from flush. Can you please post which way it should be in or out .045.

Thanks

Adam Drake or any knowledgeable tuner,

My GRP tuned engine had a gargling sound at idle. I didn't really know what to do with the tune. It seemed to run away a little after revving, indication of a lean lsn.
But at the same the gargle sounded like the lsn was too fat. I was running the GRP #4 plug. 50 degrees outside.

After comparing my measurements to the stock measurements, I discovered my lsn is back at .045(rich), my idle is at .042. I think I tuned my way into a false idle by opening the idle gap and running a rich lsn. I'm used to setting the top needle and then setting the lsn. I might have to change my tuning style with this engine.

if you read back through this thread ...you will see kinda how you tune this motor backwards in a way from others....if you go back to stock settings and retune ...you will probably be better off stock settings are

hsn 3.5 turns out from bottom
lsn 6.25 turns out from bottom

hope that helps

what restrictors are you using that get you 10+ minutes on a tank????

i liked the 6.5 restrictor the best on this engine when i was running it, had good power and run time

Anyone try a X-tech Big Boy pipe on the GRP .21 or .28? I'm considering buying this pipe or the O.S. Ninja pipe. Any recommendations???

I currently have,
JP-1
MSR 1005
O.S. 2050
9886

OS 2050 without adoubt
I was testing one day and thought lets try someting different. So I put the 2050 on it.
I never took it of again great power and graet millige.

mzl Hellsavage

One problem with that, I'm using the 2050 on my truggy now with a differant engine that really needs that pipe. Wanting to run my GRP .21 in my buggy for now. Just looking for a new pipe that is strong and gets good milage.

Going to mount the GRP.28 in my truggy in a month or two. I can switch pipes around then.

the best pipe is the grp 2053 on a buggy from what i can tell ...also the 053 pipes are very similar to the 2053 ...the 2053 is more restrictive ...so the 053 wont get as good a milage ...i may swap over to my 053 as im running the .21 on truggy ...the 053 will open the motor up a little more with a sacrifice on milage....people are getting upwards of 13 minutes on this motor with the grp 2053 pipe running buggy ...why mess with a good thing ....

I noticed that in Drakes article on how to tune these motors, they come shimmed for 30%. I've always liked running 20% just because I feel it's easier on the whole drivetrain. Is it ok to run 20% without removing the shims and what will that do to the tuning? I'm running the promo pkg so y'all know which plug and pipe I'm using.

Any one know when the e shop will be online?

Sorry wrong thread - need my eyes testing