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-   -   Arrow Racing GTR .21 Engine Thread (https://www.rctech.net/forum/offroad-nitro-engine-forum/461596-arrow-racing-gtr-21-engine-thread.html)

xxxntwv 01-21-2013 09:46 AM


Originally Posted by bigjayjay1 (Post 11705141)
What version were you running on the arrow, five port??

I was running th V3.Havent had the chance to try the 5 port out yet.

Greg B 01-23-2013 05:28 AM

I went up to the Midwest CRCRC on Thursday. The Arrow ran excellent and I was using the 2013 pipe. After trying a few different pipes, the 2013 to me was the best. Offers a totally different powerband. This track however was pretty fast and thursday night I took the engine off in favor for my Nitrotec because I'm not use to that kind of power and I was starting to over drive the car. Definately not the place or time to experiment. Now it's time to learn it.

bigjayjay1 01-23-2013 02:59 PM

Greg what version five port

Greg B 01-23-2013 03:03 PM


Originally Posted by bigjayjay1 (Post 11718937)
Greg what version five port

No, just the 3-port. I would have never had the time to break in a new 5 port and get it ready. It's so cold here , I been farting snow flakes for 3 days now. :lol:

picko990 01-24-2013 01:56 AM

any takers on the front bearing leaking i posted on the previous page?

xxxntwv 01-24-2013 02:01 AM


Originally Posted by picko990 (Post 11721126)
any takers on the front bearing leaking i posted on the previous page?

If the engine is running rich the front bearing will leak,If its tuned correctly and still leaking its time for a new bearing.front bearings are cheap and easy to replace.

ark champ 01-25-2013 11:10 AM

I got my engine and pipe a couple of days ago. Can't wait to fire it up, it looks sweet. Has any one ran it yet that can let me know what to expect?

picko990 01-28-2013 11:25 PM

thanks for the info. after cleaning, inspecting then running again it appears to be weeping only. tune was fine.



Originally Posted by xxxntwv (Post 11721131)
If the engine is running rich the front bearing will leak,If its tuned correctly and still leaking its time for a new bearing.front bearings are cheap and easy to replace.


Danny Teh 02-10-2013 08:31 AM

4 Attachment(s)
NEW GTR Plus

I ran the new engine and I find it more powerful and most importantly the fuel efficiency is a double ++

It comes with a Low CG heatsink sits lower....very solid.....still uses a P3 plug.....tuning for low and mid speed needle as mentioned in previous posting but HSN a lot leaner and still sounds reasonable.........

:nod:

ark champ 02-10-2013 11:04 AM


Originally Posted by Danny Teh (Post 11796958)
NEW GTR Plus

I ran the new engine and I find it more powerful and most importantly the fuel efficiency is a double ++

It comes with a Low CG heatsink sits lower....very solid.....still uses a P3 plug.....tuning for low and mid speed needle as mentioned in previous posting but HSN a lot leaner and still sounds reasonable.........

:nod:

What are the needle settings? Still in break in on mine, taking it slow. When you say the HSN is a lot leaner, how much? Can you give the needle settings you are running at and what temp and millage you are getting? Thanks.

VPProUSA 02-11-2013 10:42 AM


Originally Posted by ark champ (Post 11797442)
What are the needle settings? Still in break in on mine, taking it slow. When you say the HSN is a lot leaner, how much? Can you give the needle settings you are running at and what temp and millage you are getting? Thanks.

Mid - 2 turn out from flush at 2 oclock
Low - 1 turn in from flush
Top - depends on fuel,pipe,and manifold used

ark champ 02-11-2013 06:57 PM

Thanks Gene. Motor feels real good so far and haven't turned a needle more than 1-2 hours from factory. I'm guessing this motor will like to run like the others at around 240-260. Turning it loose this weekend at the pro series.

VPProUSA 02-11-2013 07:00 PM


Originally Posted by ark champ (Post 11803740)
Thanks Gene. Motor feels real good so far and haven't turned a needle more than 1-2 hours from factory. I'm guessing this motor will like to run like the others at around 240-260. Turning it loose this weekend at the pro series.

Yes, I run mine around 275' when empty and broken in.

Mark Erce 02-11-2013 08:06 PM


Originally Posted by VPProUSA (Post 11801684)
Mid - 2 turn out from flush at 2 oclock
Low - 1 turn in from flush
Top - depends on fuel,pipe,and manifold used

so with the mid setting...

1. set it flush
2. richen it 2 full revolutions
3. set it at the 2 oclock position

is this correct? or do you mean 2hrs? just seems like alot of turning unless the needles are way off from the factory

VPProUSA 02-11-2013 08:07 PM

yes
It should be at 2 oclock from the factory. Just make sure it is 2 turns out from flush.


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