So the key is not to make left turns?? LOL JK

I have had the head come off once,

I think it was due to an impact on the head more so than it just broke off. I do know a few racers that have had this issue. Not sure why, but many have gone to a different head and not had any more head issues. Not sure what the cooling difference is when going to a different head.

Anyone ever used a Sirio Extech? Are they the same as the Trinity Extech's?

Thanks

One in the same.
Sirio ( Star Motor ) is the actual manufacturer.
Trinity is the North American importer of Sirio engines, including the Ex Tech line.

Thats what I figured.. looked at the specs for the internals and they were the exact same.. everyone still agreeing upon the P4 and 2013 pipe?

Correction they were the North American importer of Sirio engines.. I think Trinity has dropped Nitro once again..

Nope. Matter of fact, I just received this press release in my email today.

P4 Yes, I was actually using the O'Donnell 97T plugs at the end of the season. They seemed to last longer and were less expensive. Regarding the pipe, 2013 was crazy (harder to control) bottom and terrible mileage. I recommend the 2057 if you desire top end, or the big boy pipe for best mileage and smooth powerband.

I have a brand new Trinity .21 ,.24 head this is the newest version fresh from factory 30 shipped

Hey guys, I'm in Tucson AZ and ran my ExTech twice this week at Hobbytown and CanyonVista.. I haven't gotten a 2013/big boy pipe, can't decide on which so I strapped my 2053 on it just to try it out. Bottom end was decent and the engine really pulled in the mid range then somewhat came to life on the top.. mid-range was the best thought with the 2053 as it is an "mid-range pipe". I'm running 7-10-3 in my diffs (jammin x2 crt) and the truck was hugging the track pretty well. My only concern, I honestly can't get the engine above 160.. not that I am actively trying but is there not a point where you can damage the engine due to the internals not reaching a certain temp? The engine has 1 1/2 gallons on it now and will idle all day.. should I fatten the idle and lean the lsn a few hours? Let me know what you guys think.. thanks! Oh and I am running a P3 plug!

.24 or .21? I would say if it pulls good off the bottom then you are okay, maybe lean the HSN a couple hours. I've got a .24 and it runs 200-210 max.. And, it will rip at those temps.. The tuning instructions say to get the bottom end where it should be, Ie pulling hard off the bottom, with no bog, but no lean.. Do this by leaning the LSN an hour at a time and pulling hard from a dead stop for about 10-15 feet. Continue to lean until you see no increase in acceleration, then richen back hour.. Then set Idle, which should be close..

At this point you should be ready for HSN adjustment, and it is done by running down the longest straight away. You want it to pull good all the way down the straight with no burble, but with plenty of smoke.. Do it the same way as the LSN tuning..

Make sure engine is fully warmed up before tuning, and always try to tune at around 1/2 a tank..

Sorry if this info you already knew..

Can't say I knew all that information... thanks! I've been looking for a pipe to use.. I think I'm going to settle with the 2013 after reading up on them. I do have the 1.0 clutch spring on it now.. going to switch to all 1.1 to see if that helps snap it up a bit.. I will tune this week at the track and get back to you.. Thanks again

I will say that the 2013 is a good pipe on small tight tracks for this motor but it doesn't get as good of fuel mileage. the 2056 pipe is what you are going to want with this motor, you get the best of both worlds, good mileage and a good pipe for small and large tracks. one other thing, do not tune the motor to temps, tune to performance, smoke and sound, then check the temp only as a reference point. these motor will run cool. mine in a truggy normally runs between 175 to 205 just depending on the conditions. When I was at the psycho nitro blast I was lucky to see my temp above 170 and it was running like a bat outa hell with good smoke trail. So don't get to caught up on temps.

Trey7 why is no one carrying the Trinity engine anymore? Or, should I ask Who is carrying these now? I was dissappointed to see A-main drop them..

According to the press relese I got fron Trinity (Team Epic) the current lines of Ex-Tech and Sirio motors have been dropped. The new line of motors look to have the same block as the Ex-Tech 2's, the heads look to be the same as the Ex-Tech2's but with a new Sirio logo on them and new color. I assume that the head color identifies the type of motor. .12, .21, .24, .27 (for the Traxxas). Not alot of other info was contained in the press relese. When I called Team Epic I was told that the new mills have a new piston, sleeve, and rod. Outside of that the spec's were not known.

So, as to who might still carry the Ex-Tech's? Not many places that I have found. There are a coupl eof places on the flea bay that have new old stock Ex-Tech's and some pipes. Not much found for parts. I hope that the new mills will at least have the same rear baring size as the Ex-Tech's. With some luck, maybe the new parts will work on the old mills in a pinch. Hope that helps for what it's worth.