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-   -   Trinity EXTECH .21 (https://www.rctech.net/forum/offroad-nitro-engine-forum/222802-trinity-extech-21-a.html)

chevydc44 08-15-2010 03:35 PM

What carb can I put on the trinity extech

D8 08-15-2010 03:43 PM


Originally Posted by chevydc44 (Post 7809353)
What carb can I put on the trinity extech

i use the RB carb and it works excellent!

chevydc44 08-15-2010 04:02 PM

Ok cool thanks

v6shooter 08-15-2010 05:11 PM


Originally Posted by (MRC)Scotty! (Post 7808449)
One of my Evo4's is doing this as well, which is why I was considering using the Werks crank as well.. BUt you will have to run a Werks Rod.. And, I am not sure if the wrist pin is sized different from sirio to werks or not.. So just beaware that you might waste the $75 for a rod for nothing..

Ran the combo had very good low end but the top was not very good.Was very weak on top.it had good fuel milage though.:ha: Btw the evo rod on the b5 crank was fine. still I will mess with it some more with the shims.Mad man at work

ScottyM 08-15-2010 10:02 PM


Originally Posted by v6shooter (Post 7809686)
Ran the combo had very good low end but the top was not very good.Was very weak on top.it had good fuel milage though.:ha: Btw the evo rod on the b5 crank was fine. still I will mess with it some more with the shims.Mad man at work

That is Odd.. But the Werks crank I have is a B7pro.. But the Crank pin is substantially smaller..

If it is making really good bottom end, then you mght just try to gear it up, and keep RPM's low.. Also try a Top end pipe if you have one, should help a bunch..

chevydc44 10-01-2010 06:30 PM

What size are the engine bearings for front and rear

DezSlash 10-03-2010 08:29 PM

Hello all i got a 2035 pipe and was wondering if it would be okay to use with the .24 FM?

jmaxey51 10-03-2010 08:34 PM


Originally Posted by D8 (Post 7809388)
i use the RB carb and it works excellent!

Carlos, the V-spec carbs works even better :nod: and SPEED carbs works fantastic also... i could never get my stock version to have power down low and i tried the RB, V-spec and speed carb and the V-spec carb stayed on it till i sold it (kept the V-spec carb tho because the guy wanted the stock carb LOL)

cjtamu 10-12-2010 07:15 AM

Anyone know what rod I can use in an Extech .21? I saw someone ask about the Werks B7 con rod but never saw an answer. Will it work, or the B5/6 rods? Siro "Quatra Stroke" also looks similar. My ExTech still runs strong, but will need a squeeze in another couple gallons and I want to replace the rod when I do.

ScottyM 10-12-2010 12:00 PM


Originally Posted by cjtamu (Post 8060322)
Anyone know what rod I can use in an Extech .21? I saw someone ask about the Werks B7 con rod but never saw an answer. Will it work, or the B5/6 rods? Siro "Quatra Stroke" also looks similar. My ExTech still runs strong, but will need a squeeze in another couple gallons and I want to replace the rod when I do.

No the Werks rods will not work.. Werks uses a smaller crank pin diameter.. The Sirio engine rod will work.. Or so I was told when I inquired about a sirio rod a year ago, they told me the extech rod would work.. You would be best off to contact Trinity to make sure before making a purchase, since the sirio engine has changed..

DRRC 10-12-2010 12:17 PM

one of the best motors I have had, one tank can last me 10-12mins
good powerband and easy to tune
that is why I have 3 of them

does anyone know who still sells the extech
is the new sirio in amain the same and can use the same parts?

http://www.amainhobbies.com/product_...ine-Turbo-Plug

what temps do you run it at
I have mine a 200-210 , getting too hot makes it not tuned

cjtamu 10-12-2010 12:53 PM

Thanks MRC. I'd like to keep this thing running. Ditto what DRRC said, mine is a beast, it's been stored b/c I didn't need it for the tracks around here. Ran it a couple weeks ago for the first time in a year b/c one of the tracks grew LOL. With a 2013 in truggy it's an absolute beast, came off the track at about 185 deg and making tons of power. But, IMO it's SOP for Trinity/Team Epic that you can't get parts for the dang thing once you bought it. Have not been racing much so out of the loop, but looks like they're the Sirio distributor now? That's going to factor into my decision on a new mill fo' sho'.

Keith Lewis 11-27-2010 10:42 PM

Does anyone know where to find a head button for the extech 2? I cannot find a part number either.

dishsoap 11-27-2010 10:52 PM


Originally Posted by coachlewis (Post 8267875)
Does anyone know where to find a head button for the extech 2? I cannot find a part number either.

I have one that is used. How much you want for it.

Keith Lewis 11-27-2010 10:58 PM

Dish you got pm.....thanks.


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