OS 12TZ 3port (Not speed tuned)
#1
OS 12TZ 3port (Not speed tuned)
Just picked it up today and was wondering if anyone has had any experience with this engine and can give me a quick heads up on what to expect and if I should be aware of anything? Opinions and advice welcome.
It will go into my Mugen MTX3. Oldie but goodie. Shes still running strong and I really enjoy running it. I'm just messing around for now, not racing or anything. I mainly take it out for practice runs but my track will be having a few club races so I might give that a shot. Mainly looking for any info I can on the 12TZ before I take it out and start breaking it in.
It will go into my Mugen MTX3. Oldie but goodie. Shes still running strong and I really enjoy running it. I'm just messing around for now, not racing or anything. I mainly take it out for practice runs but my track will be having a few club races so I might give that a shot. Mainly looking for any info I can on the 12TZ before I take it out and start breaking it in.
#2
it has VERY tight pinch so heat it to 160+, with blow dryer/heat gun, before you start for break-in.
the carb adj is sensitive, when people say 'one-hour' go a half
it holds tune well and is easy to tune
it has good torque
the skyine or os speed pipes are great
most likely you will use a #7 plug
the carb adj is sensitive, when people say 'one-hour' go a half
it holds tune well and is easy to tune
it has good torque
the skyine or os speed pipes are great
most likely you will use a #7 plug
#4
As per the manual, it requires that the engine be broken in on the track and running for its first tank. Obviously not at high speeds but conservatively for the first few tanks. I know there are a ton of different methods to break in engines and Ive used them all but should I at least run one tank at idle before putting it down on the track?
#5
the first 2 tanks, everyone is different , I like to kinda idle it on the box but varying the throttle up and down and real fat no at full throttle no big rpm, keep eye on temp so you are around 180-200
#8
Takes a long time to break-in. The pinch is very tight and will take many attempts to get going. Have a heat gun and a flathead ready to turn the flywheel over.
After break in, this engine likes to run on the hot side...>230F. Also needs a few laps before get to optimum temp. At the track, do not adjust the needles till you get a 3-4 laps.
I got about 3 gallons on mine until I sold it. The best thing about the TZ is that rebuilds (piston/sleeve/rod) only costs $60 bucks or so.
After break in, this engine likes to run on the hot side...>230F. Also needs a few laps before get to optimum temp. At the track, do not adjust the needles till you get a 3-4 laps.
I got about 3 gallons on mine until I sold it. The best thing about the TZ is that rebuilds (piston/sleeve/rod) only costs $60 bucks or so.
#9
Cant wait to get it broken in and running but I wont be putting this one through the torture test of its predecessor.
KrackerG - Thanks for chiming in!
#11
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Use P3 glow plugs also.