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Old 12-24-2007, 11:05 AM   #1
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Default help me pick a engine

i want to use an os engine in my touring car and will run under roar rules. can you guys help me pick which one?

OSMG2031 OS Speed Tuned 12TZ Spec II
http://www.osengines.com/engines/osmg2031.html

OSMG1999 EB mod. 12TZ 3-Port
http://www.osengines.com/engines/osmg1999.html

OSMG1997 12TZ(P)-T 3-Port
http://www.osengines.com/engines/osmg1995.html
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Old 12-24-2007, 11:11 AM   #2
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The spec 2 is definately the fastest out of the 3. I like the motor alot!
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Old 12-24-2007, 01:47 PM   #3
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The spec 2 is definately the fastest out of the 3. I like the motor alot!
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Old 12-24-2007, 02:27 PM   #4
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Yes I just got the spec11AL
For Xmas
Hope its as quick as my ZACS tuned OS it was a weapon
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Old 12-24-2007, 03:04 PM   #5
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does anyone have dyno graphs of these engines? you guys are saying the spec II is faster but the eb mod. .12 puts out more power (so it says).
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Old 12-24-2007, 03:10 PM   #6
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Donít know about specs
But a guy had a TZ5 eb mods and my TZ3 spec I was faster all round
more punch more top end
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Old 12-24-2007, 05:13 PM   #7
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I'm the proud owner of a Spec II

The motor is very fast, easy to tune and represents the lastest from OS designers.
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Old 12-26-2007, 08:41 AM   #8
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ok so everyone likes the spec II, now how does it compare to the italian engines out there? sirio, rossi, etc... which engine is top dog on the track?

everyone please bare with me as i'm transforming from a basher into a real racer. (ntc3 with a .18 tz to a 720 with a legal .12)
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Old 12-26-2007, 03:17 PM   #9
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ok so everyone likes the spec II, now how does it compare to the italian engines out there? sirio, rossi, etc... which engine is top dog on the track?

everyone please bare with me as i'm transforming from a basher into a real racer. (ntc3 with a .18 tz to a 720 with a legal .12)
If money is no object go JP ,Max Power or Novarossi
But the cheaper engines are not far behind these JL ,OS performance wise

For club racing I use a standard TZ3 with a 5port crank in it works great
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Old 12-26-2007, 03:20 PM   #10
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If money is no object go JP ,Max Power or Novarossi
But the cheaper engines are not far behind these JL ,OS performance wise

For club racing I use a standard TZ3 with a 5port crank in it works great
you use a 5 port in a touring car?
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Old 12-26-2007, 03:59 PM   #11
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you use a 5 port in a touring car?
A 3 port engine with a crank from a 5 port
still 3port piston liner and crank -case in a MUGEN MTX4
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Old 12-26-2007, 04:56 PM   #12
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I have the eb mods and its fast enought for me, but I would buy the speed If I was buying a new one. My next engine will probaly be a maxpower
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Old 12-26-2007, 05:15 PM   #13
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Low ET,
buy JL the new one is very good better engine than OS, OS yes is fast but is weak easy breaking the con rod, when it comes to engine Japaneses engine weak Italian engine is the best.
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Old 12-26-2007, 06:25 PM   #14
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Originally Posted by E.Rocha View Post
Low ET,
buy JL the new one is very good better engine than OS, OS yes is fast but is weak easy breaking the con rod, when it comes to engine Japaneses engine weak Italian engine is the best.
are we talking about this engine?
http://www.ofna.com/eng-jlr-red-dot-on-road.php
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Old 12-26-2007, 06:38 PM   #15
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I just got the JLR Evo 3 and breaking this in, holy sh**!

Its pretty rich still and its so torquey and just doesnt gaining rpm lol, just keeps on going.. Thumps up from me so far
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