As stated you should have shimms there. Where did you get the engine from ? Also 120C is not too much for that engine. You are comfortable running it up to 130C depending on the weather, tune and track conditions.

sorry to do this to you Grizz but I would have to say that grinding the pinch bolt down is probaly 1 of the worst things you can do to a go carb as it breaks the sleave from the main body and can crush the carb if tightened to much resulting in airleaks tuning problems etc.

heres some small tips for anyone looking at removing a go carb

#1. remove both sides of the pinch bolt completely.

#2. don't "wiggle" the carb from side to side as this can loosen the tabs that hold the sleave on the main body just pull the carb straight up (this can be a little hard some times).

just one more thing to check is to make sure that your end points on full throttle and full brakes have alittle play to allow for chassis flex as over pulling or over pushing the carb can also cause this "loose" effect.

I haven't seen the carb on the Gen 5 (08 spec) engines yet but the most resent carb I have has the 4 lugs. the first carb I had only had 1 lug the 2nd carb had 2

hope this helps

Adrian

Hi Adrian, Yeah - I had that thought myself when I looked at grinding a tiny bit off the pinch bolt ends. The carb was really quite loose, to the point were it had chewed out the bottom washer with the movement of the base of the carb barrel. Seemed like the only answer. Only took a little bit off, reinstalled carb and sealed with RTV (including pinch bolts) and the carb is now nice and firm. Seems a few others have had to do the same thing going on previous posts. I was very careful nipping the pinch bolts up. It is my spare engine now as I have put a 7 Port in my buggy, so I won't be running it for a while I guess (at least I hope not, because that will mean my 7 Port has bit the dust !!!). Hoping the weather stays fine for us to get out and have a play over the weekend.

Did it to my 3 port R yesterday and tested it as well.
It secured the carb better now and there is no movement at all.
I think it's REQUIRED!!!

Yes I am happy but other people who run other types of engines grp,other go engines 5 port are running at about 90c.
The engine came from our local shop but it was ordered from smd who are the disributers in the uk.If i need shims how many and which ones.The engines always runs good,just concered about the temp.
Cheers

i have never had to grind any carb components in 2 years of running these engines, it is possible that it got over tightned and is now tweeked and cant be tightned enough to hold it in.

Brian34, i will be looking for it.

Hey guys i am new to go engines i have been running vspecs and i am trying these motors. I am getting the 7 port and the 3 port race and the 0801 pipe. I was wondering which to start with, i run a 777 wc buggy. What are the differences between the motors? Cant wait till they get here. I was thinking of starting with the 7 port turbo first any thoughts

OOPS Carb neck was in perfect shape when it came out. It seems like a lot of guys are having the same problem. Time will tell if wev'e screwed up I guess

Chim start with the 3 spec.

I once over tightened the carb bolt and pinch the carb to where it broke the bond with the carb neck and the aluminum sleeve that goes over it.....Took me forever to figure out why the carb wouldn`t stay in place..

what is the difference between the two and why the three port

I honestly think the new 08 3R is better than the first, the crank and rod are more a design i hoped for from the GO engine, and the 3 is very strong, bottom isn't explosive but it still has a bunch, it applies power to the ground very well.

Well I did some testing today and ran 10:40 with my 7port turbo today in my buggy running WFO 50% of the time. Running in My Rc8 with a 16 tooth bell, stock clutch setup, dynamite 053 pipe, werks medium conical header 6mm RB restrictor werks 30% with axial cold plug.
I belive theres still more to be had with a hotter plug but it runs fantastic at 210-220.

Chim the 3 port will be really similar for you since you run v specs.