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Old 07-13-2009, 06:42 PM   #76
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Default OS XZ for sale

Hi, anyone interested in one O.S. XZ Motor, I have one for sale new in the box for $355.00 shipped within the U.S. Pls send PM, tnx.
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Old 07-21-2009, 09:59 AM   #77
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what other brand of plugs can be used with the ZX Speed engines other than OS?
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Old 07-21-2009, 10:17 AM   #78
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last time i checked with my lhs, u can use none other than OS. btw, os plugs last a lot longer than my nova normally.
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Old 07-28-2009, 10:03 AM   #79
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anyone tried the standard 12XZ? ie the one with the blue heatsink?

how does it perform? as compared to say the normal 12TZ 5-port?
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Old 07-28-2009, 01:40 PM   #80
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what pipe do you use for OS speed 12 xz? beside OS 1050
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Old 07-30-2009, 07:10 AM   #81
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as what i've seen here, normal xz outrun 5port tz at bottom end and less punchy on top. im not sure if its the real engine power or maybe it's because of the difference in car ratio.

XZ speed and TZ speed specII, i use hec pipe and EFRA2503 with novarossi 41625 conical manifold, slightly on the hot side but it really push mid end.
another friend uses SAGE pipe set,nice power band overall.
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Old 08-04-2009, 09:54 PM   #82
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Anyone knows where can I get a Speed XZ? It seems that it's sold out everywhere......
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Old 08-04-2009, 10:14 PM   #83
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Quote:
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Anyone knows where can I get a Speed XZ? It seems that it's sold out everywhere......
Auggy79, you have pm
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Old 08-17-2009, 03:53 PM   #84
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Quote:
Originally Posted by silverM3 View Post
what pipe do you use for OS speed 12 xz? beside OS 1050
Here's some good info if you are attending this years on-road nats:

We all know the 1050 pipe works the best with the OS speed 12 XZ, but the pipe is illegal at ROAR events (IFMAR & EFRA legal though)...some BS about stringer length, sounds like they have a person problem to me. Anyway, I tested the Mugen MSR .12 #P01004 pipe this weekend with the OS manifold that comes with the 1050...it fits, is ROAR legal and works awesome. Maybe even better.
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Old 08-17-2009, 03:55 PM   #85
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is the 1040 pipe any good or is that suited to the TZ Spec II only??
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Old 08-17-2009, 03:58 PM   #86
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I have never tried it, but I think a few US Mugen drivers are using it.
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Old 08-18-2009, 02:05 AM   #87
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Anyone had any success with the RP7 plug?
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Old 08-18-2009, 10:55 AM   #88
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Quote:
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Anyone had any success with the RP7 plug?
what is your problem then, if you use in OS engine ex:XZ should be fine since it came with RP6 and i have put RP6/RP7 to Speed XZ/Speed Spec II/TZ 5 all fine plus more top end
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Old 08-18-2009, 12:30 PM   #89
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i use it with great success. 2nd place A-main state title for 8 months old experience. should be convincing enough if u run at tropical climate
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Old 08-31-2009, 11:11 PM   #90
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anybody racing with this engine? How it performs against Novas, Sirios?? and what is the best pipe for it?
Thanks in advance
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