Re: which glow plug???
 

It's now available at tower hobbies!!!

Re: Re: which glow plug???
 

thanks bro...:smile:

hey guys it says OS TR(p)T specs as follows
4000- 38000
1.3 HP @ 30,000 RPM
does that mean the motor actually has more MAX HP considering it has 8,000 more revs to go if you know what i mean? :P im getting either a OS tr(p) T or OS TR R-spec which ever i can get my supplier to order! as he never ordered from tower.

You should get the R-spec since I believe it's the only one that has a machined piston.

I am getting my TR R-Spec modified as I speak. I have found that the motor does not like to run under 230. It seems really rich if it is not running above 230.

Engine stalling
 

G'day All,

I've has my OS-TR for about a year. I have been very happy with it. However I haven't been able to finish a race for the last three meetings. Any sort of bump and the engine just stalls. I have replaced plugs but still the same problem.

The compression is pretty poor now and I'm wondering if that is the problem. If so what tools do I need for a rebuild or is it cheaper just to buy a new engine? My feul consumption is through the roof too.:mad: I would appreciate any advice.

Ya i wanna get the R spec as well for the bigger head and that its 3 port turbo (better fuel consumption than the 5 port turbo) but there arent any available on hong kong sites only place online i've seen them on is towers and my supplier doesnt order from towers! :(

Browny, try re sizing the p/s.....pinching. Check out this site. I think that they are cheaper than new p/s.
http://www.rayaracing.com/

Brain Teased, why do you go through a supplier when you could get online and purchase the engine from tower yourself. Cut your middle man.

Nah cause i dont trust using my credit card online dont care how safe it is now just dont trust it! :p i read a few posts back that the R spec had trouble with the turbo head button? also cant seem to find the R spec engine on hong kong sites?! or any of those aftermarket heads for the OS TR's :P as when my supplier gives me the bad news that i cant get a OS TR R spec ill just get the 5 port turbo model and try and find a bigger head for it :) i saw them on rc-mushrooms.com like 2 months ago! but all their stock for OS parts are gone! only thing left is 5 port piston and sleeve set. :(

Glow plug choices...
 

I'm in the final tank of breaking in a TR non-turbo engine.
What options do i have to use on this engine? It came w/ an OS
A5. I'm using a used OS #8 i had in my pit box cause the A5
died after 10 tanks into breaking. I want to buy some spares
before the weekend. What other options do i have incase
my LHS doesn't have A5?
THX,
1T

Re: Glow plug choices...
 

#8 works ok on almost all os engines. in my expereince, A3 gets the engine in the right temperature faster compared to the a5 and #8 plug. hope this helps...:D

zac modifies ostr engine
 

does anyone know what's the main difference between the stock ostr engine and the zac modified ostr engine??? thanks:D

Dokidoki There is alot of difference between the two. The stock is well...stock. The zac modified engines are modified to various degrees. you can get everything from only sleeve porting work all the way up to crank balanced and fully polished zacs. Also a big difference in price to the stock engine.:)

would you happen to know how much would a fully modified zac ostr engine cost??? would you also happen to know how much increase in horsepower you get out of these zac modified engines??? by the way, is zac a japanese company???:confused:

mspeed...
 

rcosmax: bro...have you also heard about the mspeed ostr modified engine??? is this company japanese owned??? kindda curious. any website you can recommend??? thanks:D

Mspeed does the same kind of tuning routine as zac... from mild tune jobs to full porting/polishing jobs. They are good. I dont know any sites on the net though but i am sure a search would turn something up. Sorry i cant be of more help. I am running my backup os tr (t) e spec that i had full routine done on by my engine friend. It is very very strong, fast and reliable. I imagine mspeed and zacs would be the same. (edit in price range)

sorry didnt answer you first questions ....yes both zac and mspeed are japanese companies. the mspeeds range in price from 22000 yen up to 38000 for a fully modded. zacs are about the same. You may get a better deal as that is hobby shop prices.

Hi guys,

I do have a 1 race old Mspeed Modified OS TR-5+2 port for sale, anyone interested?

Not being baised, Mspeed is a crazy modifier/tuner, Zac is no way close to them in term of finishing, modification and performance.

I have run the Mspeed and race with some local guys with Zac, they are fast but definately not faster than the MSpeed.

Yeah i agree, I like the mspeed much better and they give a much better product for the same price.

i see. thanks for the info. by the way, where can i contact these mspeed guys??? wanna try out their stuff. would you happen to know if they have a distributor here in the philippines???

sorry i dont have any idea on contact info. Next time i go to the track i will talk to the owner and try to get some contact info......but we are being pelted by typhoons every race day so this weekend looks like a bust to.....I will try and find out for you.

Hey guys received my OS TR(p)T today and gonna run it in at the tracks tommorrow. was just wondering what setting is yuor middle screw set at? is it flush with the carb body? as mine is screwed in a tiny bit. i know Nova's have their middle screw flush with the carb body.

thanks brother...i really appreciate the effort...:D

hey guys what is the maximum temp can the OS TR(p)T 5 port turbo engines run at without over heating the engine?

also who has used the standard head and then fitted a OS hyper head to their engines? how much cooler does it run? is it worth it?

how does the engine perform after modification ?

same thing with the sts engines, they really likes to run hot.

I have found the same thing as mentioned above. the tr likes to run hot.... (common sense though start rich and tune for performance) but you will most likely see that it likes to be hotter. under 230 for me and it isnt crisp and is hard on gas.....over and it is a screamer. Mine is moddified and yesterday won the day at the track whippin the nova and rossis and jp engines. (I had won heats and races before but never overall winner on the day, and never beating the guys that were there) It doesnt have the same whip out of corners as the novas but is much smoother and as a result was faster. I say get it and modify it and you will be trully impressed 10+ liters on mine now and it still feels stronger than ever! It can take taller gears too no problem.

Yea im trying to find a solution to beat the heat as mine likes to run really good at 250 F. thats with the body off and a overly richen bottom end. if i set my bottom end really good the car will run sluggish top end wise as i have to richen the top end beacuse of the temp its running at (230 without body).

so after your mods rcosmax do you stilll have the same power but a cooler tempretured engine?

im gettng the carlsen head that has 11 fins hopefully that will help.

also i've only done about 15 tanks through my new OS TR 5 port. will it run cooler after it gets more tanks through it? because the compression will drop slightly after abit of use? as right now i cant turn over the fly wheel with one finger!

and guys what are your screw settings at?
as i've over richen my bottom from factory so i could lean my top... now im thinking to bring my bottom end screw to its factory position as it had a great take off and idled perfectly.

sorry about the long post just wanna get things ready for the next club meet.
thanks in advance to all comments :p

Brain... yes it did cool down a bit with more power after the mods. I am running the os tr (e)spec japanese modle and it has a massive cooling head. I dont think i will go up to a larger head as the stock one is HUGE. I dont know where my needles are at but they are similar to yours. overly rich bottom end and almost lean hsn. On the weekend it was not idling very well so i am going to lean the bottom a tad more. Other than that it is a rocket.:)

Hey rcosmax,
in the manual for my OS TR(p)-T 5 port it shows a few OS TR models
OS TR
OS TR(S)
OS TR(P)
OS TR(p)-T
OS TR(p)T E spec with 11a carb ... is this your engine? if so what color head do you have on it? and how many ports is it?

i would assume you would have to lean your bottom end more that a little! i would reakon you need to lean it off half a turn if yours is overly rich like mine! but if you do that your engine temps will go way up! :(

Can these motors run at 270-300 without damaging the internals?

os tr (p)t e spec
 

hey...is this engine available directly from os??? or do i have to get the regular os tr engine and have it modified???

os tr r spec
 

what's the difference between the ostr r spec and the ostr e spec??? any significant difference in horsepower rating and cooling head design??? how about the carb???:confused:

Re: os tr r spec
 

If I'm not mistaken, R Spec is ROAR/IFMAR spec, which means cranckshaft could have bigger inner dia. (8mm), and turbo scoop can be big enough to come from inside hole.

E spec must be EFRA spec engine with crank inner hole limited to 7mm without chamfer and turbo scoop doesn't meet hole.

Sleeve porting, timing, and rest of engine must be the same.

AFM

Thanks afm! I will check that next time i pull the engine....but the crank took the most work on my engine so i am sure it is not the same now lol. Thanks for the good explanation.

Re: Re: os tr r spec
 

thanks bro for that update on the difference between the 2 engines. as for power difference, which of the 2 has more power???

Re: Re: Re: os tr r spec
 

If the R spec is making use of all the possibilities that IFMAR rules allows, it should have more power....not much but definitively more, and specially on long flowing tracks.

AFM

i;ve read in the manual that it says that the rear bearing has a plastic retainer. if the motor's temp reaches above 248 deg F the plastic retainer will cease. have any of you guys had this plastic retainer on the rear bearing fail on you?

I don't remember reading that. At any rate I've run the motor well past this so called 248 deg. "limit" numerous times without problems.

hehe thanks im just gonna run the motor hot as well from now on... well i wont call it hot ill just call it.. in tuned... i was running it 270 F today! to be honest not really happy with its power, im gonna get the full mod done to it next week. sleeve and crank! and maybe carb if it can be done. but i wonder what would happen to the fuel mileage. :rolleyes:

I'm sure it will still make 5 minutes. Maybe you should try a colder plug.

Who's gonna do it?... do they know what they are doing?

I agree with Racing4Evo, you should try a colder plug, I've had great results with both the p7 & p8...
:nod: :nod: