i know all engine tune diff. but can any of u share ur needle settings so i can get in the ball park. i'm havin alittle trouble with it stayin runnin until it warms up good.

Thanks Matt, ya the motor has a ton of nip left. Nothing my box can't handle but I don't want to mess this sweet motor up hehehehe.

my grp runs like a real bag to when cold but thats okey when it warms up its all sweet just when its cold it rich if your engine is running fine when at ioperating temp leave it or you may find you will run into trouble with lean settings

Has anyone ever ran a P5 JX Ninga glow plug in a tuned .21? And if so did it run and last ok? Thanks

is this plug not similar to the grp ones ? i use the gro ones have no issue with them at all

Every grp I have ever had is cold blodded. I would have to warm it up on the box for 3-5 min before each race to get the tune to level out. Never never tune a grp cold. It will lean out when it warms up.

I hear ya Frank on them leaning out when they warm up, but mine was running like 200-210 this weekend and it was still tough for me to get the big finish line jump at RF. I had to take the turn wide before it to clear it. Seemed rich on the low end......Gonna have to mess with it this week. Great day of racing though

Not sure if it is...but the GRP plug that came with it didnt last through break in.... I'll try it

its fuuny you say that some people have good experiance with the grp plugs and some dont i have got break in plus another 4 gallons through it still on the same plug

it took a while for this engine to produce power buty its okey now...

Anyone looking to sell a low use GRP .21 ??

I have one with a gallon on it, u still can't turn it over by hand, broke in and ran 30% EB Fuel, used heat cycle, and heat gun to fire up every time, pm if your interested.

I also have some Matt.

i have a new tuned promo kit if anyones interested.

Every motor needs to be warmed up first. buy a heat gun and warm up the engine prior to every heat. Doesnt take as long to get it up and ready for tune prior to the heats.

I like the Odonnell plugs in both the tuned and non tuned.