desertbird

iTrader: (7)

If you had to choose between a GRP .21 with the promo kit pipe and a VSpec with a JP3 what would you go with? I hear the Vspec holds a tune better but the GRP is better on fuel, will last longer and has a smoother power band. I don't mind tuning but the idea of rock solid tunes is nice.

Help! I can't decide ...

Semple

iTrader: (3)

A lot of people around here run the GRP and I'm very impressed with the amount of compression. Like, 2 gallons and still having to heat it up with a heat gun. I'd give the GRP a shot if I felt like(or could afford) dropping four hundred bucks on a motor.

Merciless

Hi, If you were torn between the GRP and a SPEED it'd be a harder decision As you've asked it, in my opinion its easy, BUY the GRP everytime !

I've had both, didn't mind the Vspec at all, average power, good run time, didn't like having to replace the rear bearing with less than a gallon on it, but knew it was likely to be needed when i purchased it.

The GRP is coming on for a gallon old and metal pinch is on the way out, run times are good, power wise it's really smooth with a strong bottom end but as yet it doesn't scream like my C6 does at the top (it's better than average but not awesome as yet). That may come with a little more fuel though her though ........ Build quality is awesome. I don't know what your talking about when you hint you don't think the GRP will hold a tune so well as the Vspec either .......... again it's been great

I don't like the GRP pipe,It's over restrictive, I find the motor alot more responsive with a JP-4 on it .....

Rod

The Working Man

iTrader: (1)

O.K. I'll say it. You've opened a big can of worms.

bgbelden

iTrader: (8)

No probs with my bearings yet ( 3 gal ) on my V-spec, but i average 10 min a run so if GRP can beat that then try it out.

mxnut273

iTrader: (11)

i have never had a grp but....ive been seeing a lot of flame outs w/the grps
if i was you i might look towards the direction of an os speed

Merciless

No problems with flame outs here, From my experience with any nitro motor there usually caused by incorrect LSN adjustment

Wasn't bashing the Vspec, I do expect you'll find though anywhere you can manage 10mins using a Vspec the GRP will do 10mins too. A few locals use Vspecs and although I can't get 10mins with mine yet (still trying though as im sure the JP-4 isn't the most fuel efficent pipe, I'm still using the 8mm restricter and it's not fully broke in yet) I can easily out run the Vspec's between stops. Although again that probably isn't completely down to just the motors.......

There both quality mills, I simply preffer the GRP.......

Rod

desertbird

iTrader: (7)

I've read that the GRP is all about LSN and that's the reason for the flame outs.

Well I did it, I bought the GRP Promo kit form tiltedrc for $375. A screaming deal. I just thought I'd want more power eventually for my 8-t and the vspec just did not have the specs the GRP did. For Truggy I think I'll appreciate the power when I want it. I still want to hear your opinions though. Thanks so far for your feedback.

JBURCH

iTrader: (2)

I currently have both Vspec in Losi 8 and GRP in SX8. Vspec is a piece of cake to tune with about 8 min run times running 220. GRP is all about low speed on flame outs but getting 11 1/2 min run times at 205. I can not complain about either engine but the run time on the Grp is a big advantage. I would say either will get the job done but the GRP will give you less pit stops in the main. The gentleman with 10 min on a Vspec please give up your secret LOL

desertbird

iTrader: (7)

Better fuel economy is awesome to hear as nitro prices go up.

pracy

iTrader: (2)

there is no secret to a long run time with a vspec just a good tune. The worst i get is 10mins going hard with the best being 12min 25sec. It sits around 120c on a loose track... i think its all in the finger!

thats with a 2060 pipe...

rc31cli

iTrader: (5)

the guy that said he gets 10 min on a run time is my step dad BGBELDEN the girls with her boobs going up and down. anyway he does not tune his engines i do and if i really wanted to i could make his engine get about 11 to 12 min on a tank of gas. when i used to run the v-spec all of my engines got past 10 min except one i think my worst ever run time was about 9 min but that is still good. oh and the v-specs i used to run were pintched too so thay had about 7 gallons on it

bgbelden

iTrader: (8)

I can't drive and i can't tune but i seem to be able to blow my money on race day. So like rc31cli said he does 95% of my tuning. I could try harder to grasp everything but i just go for the fun and because i'm there to watch him win.

CarCrazy

OS

infanterene

iTrader: (18)

I get 12.45 on my maxy mod Vspec with an associated 2035 pipe. With a jP3 I get 11 min.