xpertpredator

iTrader: (3)

I sure this has been asked over and over but my brother was wondering which of these two engines get the bets fuel mileage, as well as which one is easier to tune for a novice - intermediate user, and which one has more power?

JAMMINKRAZY

iTrader: (17)

Frim what I have seen/heard the os based motors(JX21 ninja) are easier to tune and get better runtime than the grp based motors. As for power i can't comment on that. From what I have seen at the track the grp motors are pretty finnickey to tune. My os motors on the other hand are probably the easiest tuning motors I have had. Plus they get 10+ minutes in runtime.

NitroLuver

iTrader: (48)

i dunno about the grp's but that ninja is quite fast..a guy had one in his losi at rev yesterday it was beyond fast..I

cjm1126

iTrader: (163)

both engines are good, i havent been running the ninja jx very long, but i got better fuel economy with the grp, they both have good power, the ninja is punchier on the bottom, but the grp isnt far behind with the right pipe, i found the novarossi 9853 and the ttr2035 to be better then the grp pipe, it really woke the engine up

desertbird

iTrader: (7)

GRP is not difficult to tune, its just unconventional. You typically tune the LSN first. Run times are excellent. Downside, if it's for a Truggy the bottom end is just not there with the GRP.

cjm1126

iTrader: (163)

i ran the grp in my truggy and it worked out good, i used p3 plug and 6.5 restrictor and 2035 pipe, had plenty of power everywhere

desertbird

iTrader: (7)

Yeah I had plenty of power everywhere; except the bottom end. I must of had a lemmon, see my post in the GRP thread

cjm1126

iTrader: (163)

the jx definatley has some bottom nutt, similar to v-spec and speed

desertbird

iTrader: (7)

Yeah, I ran a v-spec in my truggy after the GRP took a crap, man what a difference, totally woke it up. Now, for buggy, I think I might rather have the opposite.

cjm1126

iTrader: (163)

yea the speed would be a little better in the buggy with a 2060, its smoother but still has the punch when you want it, i just started running the jx w/2060 in my mp9 its pretty sick

Losi-Runner

For runtimes and ease of tuning, hands down its the JX21. Raced last Saturday and after each 5min qualifying came in at half tank of full left. Was coming in for pit in the 25min Amain at the 9min interval with no problems.

ABURTON

iTrader: (24)

for a buggy I feel the GRP is the better engine. It gets better runtime period over the jx. It may not be what some want in a truggy but it's perfect for buggy and lays the power to the ground!

Thats not to say the jx is a bad engine because it's one of the better ones out now

http://www.carolinasrc.com/webstore/...idproduct=8834

http://www.carolinasrc.com/webstore/...idproduct=9820

Pricing is a little more now on the GRP. If tuned out to get runtime the jx is a handful for most average guys in a buggy.

However the GRP when tuned out runs about 190 goes easily 9-10 minutes and is a smooth fast engine with a decieving bottom end

jwcobra03

iTrader: (69)

I run both of these engines. The grp on my 8 2.0 gets around 9:30 on average. The jx on my 8t gets about the same. The grp is perfect for buggy plenty enough power and holds a tune well. The jx also holds a tune very well and can throw a truggy around with no problem.

bigsquidracer

iTrader: (7)

grp, for me ran both engines and i would rather have a grp.