Personally I would get a Go Tech 5 port turbo. That mill has more than enough power to move a truggy plus it gets excellent run times. If your choice is between the .25 or the .28, I would rather go with the .25.

you would be better off with a ebm5 race prepped for your truggy, it will have all the power you need plus get good fuel economy, is allready broke in and has a tko ceramic rear bearing

ok guys, what needle settings would you start with on a modded sport 3 port turbo button with the shortened LSN?

Agreed, any of the GO .21 5 ports will do the trick. I had great luck with the jammin JP-2. Stock carb restrictor and it ran 9 min. easy. My buddies ran picco .28's and to smooth out the power you are lucky to get 6 min. the GO .25 I'm not sure.

1.5 turns in from flush on the Lsn and a 1/2 turn out from flush on the high speed.

Rex

Ain't nothing wrong with the GO motors. If you break them in carefully, tune them right, and look after them (like any motor), you will get 10 gal or so.
I think most people have trouble because they are too impatient with the break in. These motors are very tight when new, and just need to be broken in properly. No motor will last if you just run a tank through it and then cane it. I am sure there is the odd ¨lemon¨ out there, but you get that with any brand - even the top dollar ones. On the whole I think you would find them one of the most reliable motors at the track.
5 Ports are very economical for their power output. 10 - 11 min with a 6.5 mm restrictor is quite obtainable, especially with the modded motors.

with the shortened lsn?

i only ask cause i thought after i ground down the lsn it would tune more like any other motor and that seems quite rich on top. just want to make sure as this motor has been giving me fits for quite some time now and was hoping that grinding teh lsn would help.

The .21 5-port.

+1 Plenty of power were you need it, and you only got to stop every 10 min or so for fuel.

Sorry, I thought by starting out meant you hadn't broke it in yet. I think the hsn should be in from flush some.I don't have alot of experience with the Sport carb, I do set the needles for break in on the ones I sell and I've heard they are right on.

Rex

what would a modded .21 3 port sport be like?

The one I modded I plan on using this summer. Almost as much bottom end as a 5 port and really close on top end too. I've been getting $145.00 for the new ones I modded.

Rex

How do you like it and do you run it in truggy? Is it worth it?

Hi Guys,

I am looking for some turbo plugs for my MM5 7p engine. What is the best plug for it or will any turbo plug will do like these: http://cgi.ebay.nl/TCA-Turbo-Head-Gl...3A1|240%3A1318 or http://cgi.ebay.nl/TCA-Turbo-Head-Gl...3A1|240%3A1318

Check out the bottom of page 193. Just been a discussion on suitable plugs.
I favour the OS P3 or P4 personally.