OS TR engine thread
#391
Tech Elite
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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???
#392
Re: os tr r spec
Originally posted by doki_doki
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???
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???
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
#393
Tech Adept
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.
#394
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Re: Re: os tr r spec
Originally posted by afm
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
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
#395
Re: Re: Re: os tr r spec
Originally posted by doki_doki
thanks bro for that update on the difference between the 2 engines. as for power difference, which of the 2 has more power???
thanks bro for that update on the difference between the 2 engines. as for power difference, which of the 2 has more power???
AFM
#397
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.
#398
Tech Master
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Originally posted by Racing4Evo
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.
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.
#399
I'm sure it will still make 5 minutes. Maybe you should try a colder plug.
#401
Tech Master
iTrader: (4)
yea i've tried P8 and noticed much more top end and maybe 10 deg F cooler. but the bottom end seems not that responsive so i tried P7 inwhich i prefer. i think i might have to play around with my gears as well. maybe as i lean it, its hitting top speed quickly and staying there for a few seconds which might be the reason for being abit hot.
And Luis im getting a guy at my track to do the mod hes been in this hobby for 10 years. and hes motors go very very well! and very very reliable as well.
And Luis im getting a guy at my track to do the mod hes been in this hobby for 10 years. and hes motors go very very well! and very very reliable as well.
#402
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which is faster???
which is faster between the OSTR turbo version and the OSTR r spec???
#403
Tech Apprentice
I just wanted to post how my R-spec ran, It is modified to the 2005 specs by TQ Motors. It has work done to the crank, and sleeve, the exhaust port timing was changed and the intake ports improved.
I ran it at the last series race for the Southwest series here in Texas over the weekend.
It had as much if not more power than all of the other motors in the A-main. I was getting over 7 1/2 minutes of run time on the track and it was temping in the 210-215 range. The idle was rock solid and it started easily every time.
I never got a chance to run the tank all the way dry on a run and have a hard time believing how good the fuel economy was. I showed the tank to one of the Palmaris drivers after a 5 minute qualifier and it was still 1/2 full!! The track was large and my chassis was not working really well but the car was good enough to make the A-mian against some very fast drivers.
All I can say is that I am very happy with the motor and the work that TQ did on it. I can't wait to see how it compares to Ron Atomics motors, I know of one driver in the A that was running an X12 and I backed off many times on the straight to avoid running him down. I have no idea what condition his motor was in but he was also pretty fast.
I could not be happier with my choice.
Good luck
Cody
I ran it at the last series race for the Southwest series here in Texas over the weekend.
It had as much if not more power than all of the other motors in the A-main. I was getting over 7 1/2 minutes of run time on the track and it was temping in the 210-215 range. The idle was rock solid and it started easily every time.
I never got a chance to run the tank all the way dry on a run and have a hard time believing how good the fuel economy was. I showed the tank to one of the Palmaris drivers after a 5 minute qualifier and it was still 1/2 full!! The track was large and my chassis was not working really well but the car was good enough to make the A-mian against some very fast drivers.
All I can say is that I am very happy with the motor and the work that TQ did on it. I can't wait to see how it compares to Ron Atomics motors, I know of one driver in the A that was running an X12 and I backed off many times on the straight to avoid running him down. I have no idea what condition his motor was in but he was also pretty fast.
I could not be happier with my choice.
Good luck
Cody
Last edited by FFR3582; 10-25-2004 at 05:57 PM.
#404
Tech Adept
glad to here you like your os! Mine has been a rock solid performer for me. At the end of sundays race my os tr started to get tired out temps were still fine but it is just tired and compression has dropped and blowby can be heard. In no way is this a complaint as i have run this engine hard for around 20 liters. I am rebuilding it this week. Initial tear down showed that the bearings are in good shape and only p/s needs to be redone. I am very happy with how this motor has performed against the italian mills and for the price is definately a great choice.
ffr how much did your tq mod cost?
thanks.
ffr how much did your tq mod cost?
thanks.