Hey vti-chris, I know you have read all the posts here, but I will ask anyway - Are you setting HSN at 1/2 to 3/4 turn in from flush max, and setting LSN to 2 1/2 in from flush and then tuning with LSN for performance as suggested by MM. I am guessing you have the long needle LSN, and this is the way to make this set up work. Just find the spot with the HSN in that range that sounds nice and crisp, then leave it alone. The LSN is very sensitive so just 1/16 to 1/8 adjustments. Having the HSN set like this will get rid of your lean bog as tank pressure drops, and setting LSN as suggested gives you wicked bottom end. We all tune our long needle LSN motors like this here and they run great. It is a little different from conventional HSN tuning but it works for that carb and needle set up.

I think that's a bit hard comment. I'd consider the R-Spec to be fully breed race engine not some RTR stuff. Also the first gen r-spec is a bit weaker than the newest gen that I currently run but that's what we call R&D

The engine selection depends greatly on track conditions and car you are running. Our team drives with 5pt on buggys (except me) as it's best match to our tracks and they are also looking for that initial kick. I'm satisfied with the r-spec and with M2C clutch it's great thing to drive. I also run the 5pt on my truggy and happy with it so there's plenty of pwr packed in that engine. If you compare r-spec and 5pt you can clearly say the 5pt wipes the floor with the r-spec when speaking or low-end punch.

For cheap alternative get the 5pt sleeve and make a frankenstain R-spec

The 5PT Sleeve+Pistion are an alternative. The reason I had purchased the GO 3 P R was because I was told that this engine puts down more power than an OS V Spec. The V Spec is a better engine in almost all areas, more bottom end, mid range and lets no forget what an awesome carb OS has/is renowned for. Did I mention how awesome OS carbs are….

X2

i'm a new racer and was wondering what peoples opinion was on which is the better engine. it would be my first new engine.

the track i race on is fairy fast, and the technical stuff isn't tight. but short bursts of power and quick accelleration, not to mention top end speed on the long straights is what i'm after.

is there a noticable difference between the 5port engine and teh 7 port engine

whats teh advantage in their range of the Modified engine over the standard one. is it just more power.

Well to some of the posts about carbs and stuff the last page.... Stock carbs and needles here no problems, I even have one old LSN needle. My problem was the wrong pipe. Oh and about trying a OS VG..... that is a joke. I have one and 2 pistons and sleeves only lasted a gallon each LOL!! The look perfect too, just no compression.

This is ofcourse as said pretty much a personal preference. In my opinion only point that the R-spec lacks vs. V Spec is lowend. It's not weak in any sense but V Spec is better and I have no problems admitting it. On the other hand it's more linear than V Spec so some (like me) might find that type of an engine more driveable. From mid-top I feel the Go is not left behind.

But as said change the 5p internals and you'r good to go. Also it does not make the engine any worse if it needs to be tuned differently than others. In case all other engines would tune like V Spec and then V Spec came with tuning characteristics like GO would you then say the V Spec sucs ?

Poinas2 the thing is that those who had tuning problems with the "V-specs" was because of their ""noobness""...after a few runs it's pretty easy to tune a V-spec.
The thing with the GO is that it has the power and if it did/will have the ease of tuning then no engine could be muched at that price range and more.
I personally tried everything with mine and i still can't get the power i want and the "reliability".
Of course i might as well be very cranky and ask too much from it...i don't know.

i like watching that video and when the truggies go to the back corner and go down the hill and disappear and like 5 seconds later they reapear like 7 or 8 feet in the air. congrats though.

Not once did I mention how great an OS VG is/was. I did say that it was breeze to tune and did everything I expected for a $125 engine, for that price it is a bargain of an engine, however I did express my disappointment because of the expectations I had of this engine (GO 3 P R). I did mention in my previous post that these GO engines are tough and can withstand punishment.

I understand what you are saying, but the earlier GO's tuned like a conventional engine, from what I understand they changed the needle to a longer LSN recently and are now in the process of changing to smaller LSN again to resemble tuning characteristics of a conventional engine with slight variances as in all engines. Most engines on the market that I am aware of tune like a conventional engine. I honestly think I expected too much from the 3 P R.

what kind of pipe are you running on the 3 p?

I was playing with the settings today. The engine performed well (not optimal) when HSN was 3/4 turn from flush and LSN 2 turns from flush.
I realized that when it was only for about 1 minut left of fuel in tank, engine gone insane in positive way (screming when accelerating and top speed was excelent).
Then I tried to lean down HSN and LSN when the fuel tank was full and no positive effect .

What to do?

thanks,
chipo

Car: Jammmin X1-CR FTE
Engine: Go 7 port Turbo (7.5 mm insert, long LSN needle)
Plug: O.S. P3
Pipe: Hong Nor 053
Fuel: Tornado (20% nitro, 14% oil)

hey tc3electricguy i would go with the go .21 7 port with the go 0801 pipe runs great on top side and has some nice punch at the bottom and its personal preference on mods usually better fuel milage and smoother rpms. if you you want to keep the revs down on top go with the 5 port but it still screams nice with the go 2047 and go 0801 pipe also this is going in buggy right ????

Eureka Pro 2027, made by HN same as PCR 2027, very, very similar to HN 2047. HN 2047 has a wee bit more top end that’s it….

i you havent tried the go 0801 i would suggest it, that with a p3 glow installed really opens it up. I was shocked at the difference it made.