Make sure your temp gun is right.

Rex

Sounds like the rich LSN, wide idle gap thing to me.
Check your idle gap is really tiny (.7mm). Richen top end to flush with the barrel then start leaning the LSN until you get a steady idle and good results on the pinch test. Lastly, adjust your idle if necessary. The Go Tech motors are really touchy on the LSN. Once you get this right you will be sweet.
I had exactly the same problems. Plugs blowing all the time, running OK but running very hot at the end of a tank, piston and button very black. All caused by too wide an idle gap and a rich LSN giving a false "normal" idle.
Sounds lke you may have had a couple of small air leaks too, which wouldn't have been helping.

I need some feedback from you Go-Tech experts out there
I am currently running a 5 Port Turbo in my buggy but am looking at changing to a 7 Port. The 5 Port was originally in my truggy and seems to have a little too much bottom end for me to handle in the buggy at this stage (I am a relatively inexperianced driver). I have done several things to tone down the 5 Port such as 086 high end pipe, 7mm restrictor, carbon shoes and 1mm springs, plus recently gone to 14 tooth bell (13 standard). It all helps but I am thinking maybe a 7 Port with a more workable bottom end might be a better solution, and easier for me to drive at this stage. The track I run on is what I would call medium tightness. Tight but flowing inner section, reasonably long straight, a long triple jump and a closely grouped 5 jump section. I also thought about the 3 Port R Spec, but a lot of the buggy guys at the track seem to prefer the 7 Port over the newer motor. I would appreciate your thoughts

How do you guys think a Go Tech .21 7-port will do in a truggy? I do not like alot of torque and am a very smooth driver. I wen form a Picco .28 to a Axial .28RR and was alot faster with the axial because of the way it put the power to the ground. I am thinking the 5-port still me have a little too much torque them what I would like. The Axial RR is perfect but since I am now a dealer for the Go Tech motors I would like to run them in my buggy and truggy to promote them.

The 7 port works great in a buggy, with the 053 pipe, with your five port, you could use the standard head button, and go down to 20% nitro content, the JP-3 pipe would calm it down some also, not so nuts on the bottom, you could also go to a shorter center diff gear too, (if your stock center spur gear is 48 tooth, go to a 46 tooth) then go back to the 13 tooth clutch bell.

The 7 port will not give you the bottom end torque you need for the added weight of the truggy, it's more of a top end engine, Use the 5 port turbo for the truggy, then hold on to your shorts!

I found this weekend my engine seemed to be tuned well and as the weather changed I got a lean bog once again, engine would take off cold and be ok, then it would feel hot on the track. but I'd bring it in and it would temp at 190. So I heard to try a novarossi carb so I did for a qualifier. Put a quick rich tune both bottom and top. Night and day difference, it was WAY better. Had good bottom and top end, temped out about 210 after 6 minutes of hard racing.

Is there something wrong with a run of GO carbs???

I've just lost faith in the GO's. Loved my 5 port turbo so much after 3 gallons, I bought another one. Did my usual break in procedures and the new one wouldn't keep a tune or idle. So I took out the carb to seal it and there was so much play, it was rediculos. Fortunately, I had an OS Speed that was at the end of it's life and swaped the carbs. Ran good but it won't last more than 10 minutes without flaming out in the A main. Last night I took out my old trusty Go to run the main. It idled great, extremely fast and it died within 4 minutes. Took out the plug and it was bad, put a new one in but had a hard time starting and it felt like a rock was caught in the flywheel but nothing was there. tried to turn it over again after a minute or so and all seemed fine and it started, went back out on the track and it died immediately. Done for the night. I just took it a part and the wrist pin holder snaped off inside of the piston. Don't know if I am going to rebuild it. Is 3 gallons the life of these Go's?

grizz, Can't imagine you'd need anything other than the 3 port R in buggy. Run mine with a dynamite 086 and is the smoothest engine I have ran. plenty of torque and yet drivable. stock with restrictor and all. And the 5 port with turbo head/jp-2 works great in my truggy. Sealed carb like suggests on web site and have not had any problems at all!

Thanks for the info so far guys. Hmmm - I already have a Dynamite 086 pipe, so it looks like it might be going onto a 3 Port R in the near future.
stu541 - that sounds like just what I am looking for, smooth and drivable. The 5 Port is a beast for sure, but I think it's actually slowing me down trying to control it

Dude it sounds like you bought my m otor! I am having the same problems. Broke my wrist pin holder, so I ordered a new p/s/r. But due to the earlier problem my crank pin was worn. So even with a new rod there was slop. I decided to give it a shot anyway. So I start break in again. It starts to run erratic again. Come to find out the play in the carb was due to the outer metal sleeve seperating from the inner sleeve. It is now stuck in my crank case so I couldn't swap carbys if I wanted to.

Moral of the story though, call Russel and Dana at racefactor. They WILL take care of you. I was impressed that Dana took the time to call me and she said that is definitlly NOT normal and IS covered by warranty. Don't let a bad experience sour you. They have great customer service.

Quick question... what is meant by "it will be alot of motor on the 28 with that pipe."?

Right, following on from my previous post and the responses, thanks by the way, I decided to take the filter off tonight and have a look at the carby.

Seems to me that for some unknown reason, my carby wasn't closing all the way on it's own. I had to forcibly push it closed. I have re-tensioned my throttle linkage spring and re-adjusted the linkage itself. The idle gap was pretty much spot on already. Like I say, never had this issue before?????

Checked it all out before putting the filter back on and all seemed to be good, now to wait until the weekend to check whether it's sorted the problem.

Thanks again for the suggestions / responses guys.

meaning more grunt than it already has, the JP3 adds bottom very well on the GO engine's, i like it on the 3 and 5 ports. if you have a .28 run a 086 or the 1005, it makes it more drivable.

Truth is, .21's have gotten so good these days that there really just isn't a need for much else in truggy or buggy. But if you really must have a bigger big block, check out the Go .25. Supposed to have silly power with better mileage than the .28's. I would prefer something nice assmooth instead of violent power.