Not too sure about the OS engine, Nova engine is something like 4.29mm I think. If the crankpin is worn, your engine may keep eating plugs, like what I had recently. Try turning the flywheel and check the freeplay to TDC. What I normally do is apply some oil on the gap (where the conrod meets the crankpin and see "how much" bubble it creates.

-- so "how much" bubble is considered ok?
thanks again bundy... :D :)

Yea I may have to check that. I got it past that 75% throttle thing. So by checking the bearings im mostly checking for play right.

yup...

WOW this board has been mighty quiet latley. Anyone want to buy a 5port TR. It has good compression. It is slightly past breakin wiht about 1gallon thru it. Just PM me for all of the other details and asking price.

i was wonderin what u guys think of the original os-tr 3port ... i sort of got my hands on it (its brand new)....thanks...

hey guys,what is the baseline needle setting for the os max 12 tr(5 port turbo)???thanks

Just in case you guys in Europe and the UK are wondering. The OS MAX .12 TZ(P) 3 port Part no 11373 is 100% BRCA and EFRA legal. 7.0mm crank bore with an unbroken crank exit

OS only make one version so no matter where you buy it in the world it will be OK. I just got one and its pretty fast. More power than the Mega i would say

For $185.00 its a real bargain!!

Cheers

I'm trying to sell my OS TR TP 70shipped in the US, engine has less than a gallon on it. Pm me for more details and pics.

the os tr turbo 5port owns i luv this engine but its not race legal so i got a sts D3R and i got a OS .12 tz 3port comin so i dont know which one is goin to b my back up yet

os tr r spec
 

what do you guys think of the tr r spec for racing ?

MIKE WTF!!!!!!! :flaming:

Do you have to soak up every thing I tell you. Stop copying my motors!

FS: OS TR R Spec with spare threaded shaft
 

hey guys
im selling an os tr r spec 3 port turbo
has had about 2 gallons of fuel in awesome condition and compresson on this engine is so tight, never pinched or squeezed liner.

however one slight problem, one of the heat sink bolts into the crankcase is threaded :( i have replaced the 3 other screws with bigger screws for added durability.

engine has the orignal sg shaft for use with on road cars and also a threaded shaft so you can use this on trucks.

i am selling this for $100us

pics available please email at [email protected]

Thankyou