Good to see the mail delivered. Enjoy, and give us feedback on the track and the video itself.:nod:
Just for the hell of it, I put an old truggy race motor that was spare,
an RB TM928 in last years buggy, a RC8B ASSOCIATED, it will be the demo basher from now on: Something like having a 454 chevy motor in a Mini, What a blast.:D

Oring help!
 

Hey all,

I need some help or a tip. Big dummy (me) took the o-ring out of the neck for the carburetor. You know, the o-ring that goes into a hole that is smaller than it is and sits in the grove around said hole?

I cannot for the life of me get the damn thing back in! Been dinking with it for a couple of hours. :mad:

I took a small piece of lexan and made a sleeve to hold three quarters of the thing in the grove, but cannot convince the last bit to go. ARGH! :flaming:

Thoughts?

Yes, they can be tricky. Lube the oring well with after run oil or similar ( I always use proper rubber grease on orings myself) Simply push the oring into the neck of the crankcase, and feed one section into the grove at a time, similar to putting a bicycle tyre on to a rim, but in reverse. DO NOT ROLL the ORING, this can lead to improper sealing. you will find that as you get towards the end of the oring,it will pop into place; Caution;IS IT THE CORRECT SIZE AND DIAMETER YOU ARE USING. iT IS ALSO NOT A GOOD IDEA TO REUSE THE OLD ONE AS YOU MAY HAVE STRETCHED IT GETTING IT OUT.
Hope this helps

Word!! I had despaired that I would have to order a new o-ring and wait.

Fortunately, the same dummy who removed the o-ring (again, me) was smart enough to have a spare, but to dumb to actually look!! :D

Got out a new o-ring, had it installed in less than 60 seconds. Can't believe I wasted that much time. :blush:

Benefit from my experience, do NOT remove that o-ring unless you have a spare handy and throw it away! :nod:

Knew ya could do it. It doesn't take much to stretch small o rings,(or any o ring for that matter) especially if they have been in service a while, they loose their elastisity very quickly and especially with heat.

Hi Ted,
Some of the boys watched the dvd at the track (on a lap top) the other day.
Nice work. Your daughter does a great job. Great action footage with the odd slow mo thrown in :sneaky:.
All the guys commented on the track. It is a very nice looking set up you guys have up there.
All in all a great success. It's now doing the rounds, so will be well viewed :)

Hi Shane,
Glad you enjoyed the video. The daughter is very passionate about her work. We have put a lot of work into the track in the last 2 years, and hopefully this year will bring further improvements. Our club AGM is this Saturday, and a little birdie tells me they have nominated me for president.
Time will tell. Who knows, we may see you race here for the Cairns Cup one day. Don't forget, my early offer still stands.:nod:

What other cooling heads fit the GX5R?

Racer's Edge makes one that fits, i think its the one for the nova engine.

All the GO range and the MG66 and even the new GX11 will fit tho you will need the new head button with it and also longer head bolts.

Where can I buy one?

Where are you located ?

hey guys, I got my hands on an older gx-7 and I have been breaking this motor in. I must say I was an Alpha runner for a long time but this 7 model has showed me something and I am I must say impressed. I idled 500 cc through the motor controlling the temp with the needles while I had my competition heater on it while it was running. The thing idled beautifully the entire 500 cc bottle. since then I have ran another 1000cc through it and it is coming in I believe. Using a Alpha 2090 pipe this thing seems to be insane!! I can't wait to get it on the track and see what it can do. Is there a temp range these motors like to run at to be "HAPPY"?

Hi Bobby, Yep the GX-7R is a screamer - very nice motor with insane top end.
Should come to life fully around the 6 litre mark if not a little sooner.
I never worry about temp as far as tuning goes, but when mine was temped on the odd occasion it was running at around 230 - 240 F after a 7 min heat, but this will change with fuel, plug, climate, altitude etc etc - which is why I never bother with temps. Good smoke, good performance equals a happy motor regardless of temp.

One thing with the GO's is they always sound a little rich for the first couple
of minutes when started from cold (unless you use the Comp Heater, which I see you do).
A lot of people get caught out by leaning them on the box when they first start them, then after a few laps when the temps get up they go a bit flat.
Run for at least two to three minutes before making any major tweaks if the motor seems a bit rich. Chances are it will warm to the task and start flying without you having to touch a needle.

+1

I'm glad you mentioned those 2 points Grizz........ I see it all the time, people making all the same old mistakes :nod: