What carb restricters you guys using and who makes them for this engine?

I am ising the 053 pipe and makes great power but guzzles the gas. :(

Any Sirio Based restictor will work (werks,Orion alpha)... Try using the 086 pipe for a little better fuel consumption.

i have a .24 racetune engine .it runs real lean on bottom at stock needle settings.it is at about twelve hours out some stock.i am getting ready to throw this piece off .... a way .you movethe low end out one hour it runs lean. i have sealed the engine.i am lost with this engine.

are you ruuning it in a truggy ? which one maybe its not the motor and maybe its the gearing i found that this weekend my mugen was under geared i went up 2 teeth and fixed all the problems .give it a try .

Huh? What does the gearing have to with whether an engine is lean or not?

I just got a second Extech 2 raced tuned yesterday
When I started it today all the settings on the carb were wrong
it was righ and the HSN and LSN were sticking out
I tried the rich settings and still would not work well, very rich
What can I do for this engine and what settings
I am using a dynamite HS pipe, odonell 77 plug, 30% fuel
My first extech race tuned was right on and have not touched the setting since getting it a few months ago with the same pipe, plug and fuel

Are you saying you have been running the engine for months at the break in settings? THe FM and RT models have been run on the bench with break in setting on the carb, you should have to go in SEVERAL hours on the HSN to achieve race tune. What temp is it running at?

Yes I have
The first Extech race prepped engine that I have not touched the settings on was EB mod, Ed Bridges, modded and race prepped hence the carbs were set to his dyno tune. I had an email from chad saying he now breaks in the Extechs now and leaves the carb rich. My contention is if it is broken in and race prepped dyno tuned it should have the settings that it was tuned with, why reset the carb and make it rich? I have 2 EB Mod engines and put it in the car and break in 20 mins and then race with the same settings
I am disappointed bec I thought it would be the same Extech .21 race tuned engine like I had bought before. So spent more money on just being broken in, tuned and reset to rich, this does not help me and this is not what I expected hence the frustration right now. Evenmore bec I have a big ROAR race this sat where I will drive 2 1/2 hr to race this engine but will be breaking it in and tuning it over there :cry:
EB mod engine that were dyno tuned were very crisp and fast, I did not even dare to touch the settings because they were like butter, I could not do a better job if I tuned it myself for a few weeks.
So what are a good starting point for this engine. I tried the rich settings in the instructions and was still way off, tried the tuned settings and were too lean, so I am at a loss right now. Temp was 220 after running half speed 5 mins.

My FM 21 when I ran the Dyn 086 pipe ran 180-190 no matter where I ran it. I am not sure as far as how many turns in or out on the needles, I tune mine by feel on the track, and just check temps for a piece of mind I guess. As long as I get smoke coming out of corners and at end of longest straight, I am good with it. I did change this past weekend to the big boy pipe and had to lean the HSN 8 hours, but still came off after main at 192 degrees. This is in my Trinity Extech 2, I have the new Epic version sitting in my pit bag just screaming to go play:sneaky: I will say the big boy pipe WOKE THIS MOTOR UP big time, but I did loose fuel milage, which should not have happened, going to spend a little more time tuning and see if I can get milage back. I was getting around 10min a tank with the 86pipe.

What is the best pipe to use with the extech 2? I run a rev so it's a large track i tried different pipes the big boy, 086 didn't like either one

I race at Revelation aswell and run either the 2013 in my buggy and 086 in my trugggy.. if you dont like the 086 try the sirio 2057... or 2058

If you ever neeed any help with the engines you can either ask me for some help. just find me Blue and Orange D8 with an ex-tech

Cool thanks yeah i like the motor it seems to run pretty good i just put on a ttr2035 and it seems like it has alot of snap and it idles really good that is a bottom end pipe we will be there on sunday so if you want to come out we will be there they just did a new layout it's pretty fun

HI Everyone,

It has been a wild and crazy summer with the move. I wanted to apologize about not answering some of your guys emails and taking care of some of the problems as quickly as I have in the past. we went a fair amount of time without engines or parts and I have more responsibility which has hurt my CS time.

Currently everything is back in stock and im catching up on backorders. The new engines are great and run better than before. A couple of the upgrades are new crankcase that has a lower cg, new head, and carburetor with a better fitting orings. no more loose lsn.. also they weigh less :)

on another note. This is something most people dont think or realize when they are installing the clutch. sometimes cranks have a small amount of play. When installing your clutch, pull the shaft out as far as you can before installing cone washer and flywheel. By doing this it

1) prevents the rod and crank pin from wearing on the back plate
2) prevents premature wear from the rod bushing and crank pin as it wont move around during operation


Thats it for now,

TTYL
Chad

oh pipes and inserts

1) I only run Big boy on a .21 FM with 5.5mm restrictor. i can get 11minutes a tank everytime i run my car.

2) I only run a 2057 on a .24 FM with a 8mm restrictor. Same thing 11 minutes a tank..

both with os p4 glow plugs and 30% platinum fuel. Fuel plays a big part on runtime.

It's not possible for them to send you an engine that's "tuned and ready to go" out of the box. Different fuels, different plugs, different pipe, altitude, temp, humidity. All those affect how the engine runs. Hell, you have to retune the same engine when the weather changes. If you got one before that ran without you touching the needles, that was just a stroke of luck. Tune the new one and let it rip.

I just got my .21 Pre-Run from Amain yesterday. Sweet looking engine. I took it apart to inspect just like all the other brand new engines i buy. I took the back plate off. Do you know where the grove is in the side of the motor where the backplate goes into. I saw what I think is a little crack. Im thinking I should send it back to Amain or should I send it to Trinity? Its the new model by the way?

yup thanks that's the only thing I can do now
I was expecting this extech 2 to be dyno tuned, but upon reading the ad it says tuned to be the same as the original prior to breaking in
so it will run like a new one but is not tuned to go faster
again EB mods dyno tunes it and leaves the carb settings
this is how my other 2 eb mods motors were, unfortunately I did not know that eb mods does not do the tuning for extechs anymore
I like my engines tuned because I am horrible and too soft on the engines, I keep it a little rich, that is why I will pay for a pretuned one if possible
maybe next up will be the massive mods go :eek:

I think Epic is sending them out set fat due to the fact that tuned in one climate might not be tuned in another.. Its really only to protect the consumer and IMO is very smart. I had an original EB FM Ex-tech and it came the same way as the new sirios running fat. When they break them in they run 500 ml through them and still require some break in. I know it says you can just throw it in the car and go, which you could cause it is ready to go however it still would be wised to run a few more tanks at a fat setting IMO.

Who has any of these restrictors in stock??

Has anybody took apart this engine to look inside well i did i found rust on the crank and the rear bearing and also found a crack inside the case right by the bearing i have the pre-run race tuned .21 and im running byron's 30 percent

Rust has nothing to do with the motor. Has to do with either where the motor is stored, is it damp or humid, is after run oil used and also the fuel that is being used can cause rust after running and letting the motor sit. I used to have that rust problem with some fuels till I switched to Cold Fusion. I am not one to bash so I will not mention the other fuels. Now the crack I do not know. It may be just a casting mark and not a crack at all. These cases are cast aluminum as far as I know so you do see some stuff like that.

And also had oil on the side of the case but there is a crack right by the bearing you can feel it with ur finger i really like the motor i use byron's 30 percent with 11 percent oil so it should have enough lubrication in the motor i will post some pictures of the crack

Send it back.Chad's a standup guy.If your motor has a crack they will make it right with no problems.Thats the way they do things.Good company and good men.You can trust them.

RCPro NE Rd 2 @ Blue Diamond RC Park
 

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Extech 24
 

I took my Extech fully modded .24 out for its maiden voyage this past weekend at round 4 of the JBRL Series, and WOW!!! I finally found the power I was craving all along for my 8ight-T 2.0! It helped me place 2nd in Sportsman Truggy A-Main. The engine ran flawlessly all weekend long, with awesome power and very respectable run times (9-10min, still running rich). For anyone that feels a .21 doesn't quite offer enough power for your truggy, this is the hot ticket for sure.

For all of the extec fans. I would personally not used after run oil on this engine. I dont know if it was the brand so I wont mention what I used however its a very common brand name.

I am almost postive this caued the silicone putty to fall out of the crank. I dont think I will ever have it filled and just run it like it is. I have had a few races without it and the engine runs amazing.

Just my 2 cents for all of you goin to purchase and run this engine.

+1 do not use after run in these engines

does any body know if any other carb. fits the the .24. thanks

If it uses the same carb as the .21 a nova or os carb will work.

I have a grp carb. on a extech 1 . The 2 should use the same carb. Chad has my 2 at the moment so i can't verify they are the same.

Hello everybody!

Im am willing to buy ExTech .24 Full modded engine, and I have some questions about it.
First of all, how will it run with OS P3 plugs?? Here in local stores I cannot buy OS P4, only P3, P6 and P7
Second, is it possible to use Meccamo 25% Off-Road fuel? Here I can buy only Byron with 30% nitro, but I dislike it very much.

Thank you in advance!!!

Yes the p3 will work fine, thats what i use.... I have never used Meccamo 25% or any other 25% in my engines.. 30% IMO would be the best for this engine..

i didn`t use any after run and the silicone fell apart and went up thru the engine

My Extech ran pretty good until it snapped the crank in half.
Waited over 4 months for a replacement crank and put it all back together, reset the needles to stock and proceeded to tune it.
Didnt matter what we did...it sucked.
Felt like I wasted my money on this one...not even 1.5gals on it too.
Its for sale for $100 if anyone is interested.

Hey guys can someone help? I am trying to improve run time on my FM .21, I am getting max like 7:30 in my MBX6. I have the 2013 and 97t plug. I have about a gallon and a half on the motor, and it usually comes in temping around 215. I am not a really smooth driver but it seems like I should get a little better than that.

Oh I am running aluminum shoes and 1.0 springs with a 13 tooth bell.

7:30/8 is good with the 2013. Try the 2057. You should avg 8:30/9. You'll lose a tick on the bottom, but open up the top quite a bit too.

Allright I will give it a shot.

Try slapping a NovaRossi carb on it... Looks like you have a few..... My carb was acting up after sitting for a few months . Put on a nova carb and wa -la! Is the rod oval'd out?

Have anybody tried any dynamite pipes with the .24. My big boy pipe spring clips broke at the track so I put the 086 pipe on it. I kind of like it but its not like the big boy pipe. I have a 007 i want to try and just curious.

I know a few have tried them on the .21s. They perform pretty good from what I have heard. I havn't tried them though. The 086 is more of a top end pipe, you might want to try an 053 for more bottom-mid. I know nothing of the 007 but it's worth trying just for the experience, pass your thoughts on so others know. :)