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Old 03-08-2008, 09:33 AM   #16
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Other than price, how would you compare this with the OS.12TZ 5port? I am thinking of getting this one but came across the Spec II...

What is the difference?

Thanks.

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Old 03-11-2008, 12:38 PM   #17
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Quote:
Originally Posted by bboy View Post
Other than price, how would you compare this with the OS.12TZ 5port? I am thinking of getting this one but came across the Spec II...

What is the difference?

Thanks.

os .12tz 5port = 1.62hp @ 34,400rpm
os .12tz specII = 1.70hp @ 35,000rpm
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Old 06-10-2008, 06:02 AM   #18
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Default OS TZ Spec II & T1040 pipe

I recently ran at a national using the T1040 Pipe on the Spec II. I couldn't get the engine to rev through, and at about 100 degrees C it ran as if it was still very rich. I even Geared the shortest gear ratio possible (MTX 4) I ran 16T/21T Pinion with 60T/54T spurs, and about 61mm tyres. It only seemed to perform at temps over 100 degrees which I was concerned about. The engine is still new.

Is this caused by the incorrect pipe for the track. We also run 16% nitro.
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Old 06-10-2008, 07:52 AM   #19
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rascal,

110-115 C is fine, you will not hurt the engine. If it is still very new, it's very tight and won't want to rev. I have one that's coming up on two gallons now and it still sticks at TDC when it's cold! The 1040 pipe is what I use for most tracks with good power and runtime. What plug are you using? 16% fuel is fine, I run 20% in mine everywhere with a P7 plug unless it's very hot weather.
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Old 06-11-2008, 03:48 AM   #20
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I'm also using the P7. What gearing do you run.
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Old 06-11-2008, 07:37 AM   #21
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rascal,

17/24 pinion, 59/53 spurs, 60mm rear tire. Adjust accordingly for larger tires to maintain the same rollout.

Good luck!
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Old 08-25-2008, 07:00 AM   #22
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Default OS Max .12 Spec 2 Tuned pipe

Give the Nova 2601 a go with a 7 fin header, great bottom end, works very well with the Spec II, good power, run time and runs cool.
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Old 08-25-2008, 04:30 PM   #23
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Could you please elaborate what '7 fin header' means and how do i recognise how many fins my headers have????
I've never heard it before
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Give the Nova 2601 a go with a 7 fin header, great bottom end, works very well with the Spec II, good power, run time and runs cool.
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Old 12-13-2008, 02:53 AM   #24
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Quote:
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os .12tz 5port = 1.62hp @ 34,400rpm
os .12tz specII = 1.70hp @ 35,000rpm

This sounds like a small difference. Is that correct, or am I missing sometihng?
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Old 12-13-2008, 04:58 AM   #25
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os .12tz 5port = 1.62hp @ 34,400rpm
os .12tz specII = 1.70hp @ 35,000rpm

as u can see,

the os .12 TZ 5 port has 5 ports,
the .12 TZ specII has 3 ports.

some clubs and national events have rules about the number of ports, a Tz spec II will out perform any .12tz 5 port
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Old 12-13-2008, 09:44 AM   #26
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Is the difference really that noticeable? The comparison looks small for an extra $100+...
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Old 12-13-2008, 06:35 PM   #27
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skyline vr12+ is a good pipe aswell
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Old 12-14-2008, 06:42 AM   #28
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Quote:
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skyline vr12+ is a good pipe aswell

yup ! i use it on mine....
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Old 12-14-2008, 06:46 AM   #29
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Quote:
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Is the difference really that noticeable? The comparison looks small for an extra $100+...
3 port ...on road legal (ROAR )

5 port ..on road NOT (ROAR )
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