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Old 03-31-2005, 07:14 PM   #286
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Quote:
Originally posted by Paolo M
GoldFinger,

I have found that sometimes the LSN have some diffenrences in length. So is not really a good indicator the # of turns. I think that the pinch procedure (described in a previous post) is much more accurate and for sure safe.

About clutch setup, i have tried different solutions . and so far the best solution is: std flyweigths, yellow pads, 1.8mm spring (part 909518), 0.7mm end play and 1.7mm more or less pre load (from top of clutch nut to preload adj collar).
Important is also the pipe. If you doon't use the 2607 you will mes a lot of bottom

Paolo
Hi,
Once I saw you mention 1.7 pre-load.. what a relief for us here. Thanks for confirming that, absolutely we have same engine.. ha ha ..
About the needle quite funny is it? anyway the pinch is very much make sense.. will do.
Agreed with the pipe, in EFRA race NRS 52606 and MAX 02602E is not for this engine. But very wide option for turbo/outlaw pipe.

Good Luck for your racing scene.
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Old 03-31-2005, 08:57 PM   #287
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Hello again darling, when can I see your outstanding performance using this engine because your team driver could makes everyone pretty shocked during last 1:10 Lola race...
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Old 03-31-2005, 09:25 PM   #288
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Quote:
Originally posted by Paolo M
GoldFinger,

I have found that sometimes the LSN have some diffenrences in length. So is not really a good indicator the # of turns. I think that the pinch procedure (described in a previous post) is much more accurate and for sure safe.

About clutch setup, i have tried different solutions . and so far the best solution is: std flyweigths, yellow pads, 1.8mm spring (part 909518), 0.7mm end play and 1.7mm more or less pre load (from top of clutch nut to preload adj collar).
Important is also the pipe. If you doon't use the 2607 you will mes a lot of bottom

Paolo
Paolo,

can you advise the pre load of ZX21 ? what is the right set up of the clutch to get the best preformance. Mine comes with the 2002 conical set with the powerpack.......thanks
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Old 03-31-2005, 09:33 PM   #289
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Default Re: Difference between 2602 & 2607 Pipe?

Quote:
Originally posted by gonzoY5
Paolo, Can you explain how the ZX12 Race will perform differently with the 2602 & 2607 pipe? I had the 2602 and then bought the ZX12 Powerpack that came with the 2607. I haven't run it yet, but I would liek to know how it might behave differently with the 2 pipes. Thanks
Hi Gonzo,

The difference is the powerband. You definetely will have more top end with the 2602, but bottom is really bad and even playing a lot with different clutchs does not help that much (at least is not the same performance and punch feeling than with the other pipe). The best result with this pipe anyway is with the conical header (don't remember the code, but our conical header is by far the best one in terms of performance)
If you have slippery conditions, is the way to go.

2607 have a lot of bottom and good top end (not as good as 2602), but you can play with gears and shifting point to achieve excelent result. It is also less critical on clutch (a non perfect clutch setups still is fairly good)

For my personal driving style, even on slippery conditions, 2607 is my choice

Hope this info is useful

Paolo
Serpent USA
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Old 03-31-2005, 09:35 PM   #290
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Quote:
Originally posted by daniz24
Hello again darling, when can I see your outstanding performance using this engine because your team driver could makes everyone pretty shocked during last 1:10 Lola race...
Dont worry...the time will come
What I mean the time is when you were pitting for me ..
Will I see u @ 1st nats ?
Racing or just "facing" ?
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Old 03-31-2005, 09:36 PM   #291
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Quote:
Originally posted by GoldFinger
Hi,
Once I saw you mention 1.7 pre-load.. what a relief for us here. Thanks for confirming that, absolutely we have same engine.. ha ha ..
About the needle quite funny is it? anyway the pinch is very much make sense.. will do.
Agreed with the pipe, in EFRA race NRS 52606 and MAX 02602E is not for this engine. But very wide option for turbo/outlaw pipe.

Good Luck for your racing scene.
Also pre-load is not that scientific, but more a feeling (engagement rpm, punch, etc). You never have springs with the same length and diameter, so depending on this you need more or less preload.

Thanks and enjoy your Mega

Paolo
Serpent USA
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Old 03-31-2005, 09:43 PM   #292
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Quote:
Originally posted by speedy100
Paolo,

can you advise the pre load of ZX21 ? what is the right set up of the clutch to get the best preformance. Mine comes with the 2002 conical set with the powerpack.......thanks
Hi Speedy 100

In 8th scale is not really different. ZX21 has a lot more torque than our previous engines, so clutch setup is different. I am still playing with that and to be honest i haven't found one that i really like.

Here are 2 options for the 950R:
1) std flyweigths with 2 holes (3mm), 1.8mm spring, 0.7mm gap, yellow shoe and 1.7mm preload

2) 6588C flyweigths (this are from centax 1 clutch) withour spring, 1.8mm spring, 0.6mm gap, 1.9 preload

Those 2 are good, but still we have some room for improvemnet.

I'll keep playing

Paolo
Serpent USA
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Old 04-03-2005, 07:34 PM   #293
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i just got a new zx.12 mega and took the head off to shim for 30% and it had already 3 head shims in it. do i need to put one more?
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Old 04-03-2005, 07:49 PM   #294
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Quote:
Originally posted by roadrage
i just got a new zx.12 mega and took the head off to shim for 30% and it had already 3 head shims in it. do i need to put one more?
Hey Austin i watched Mark (1fastserpent) race today with that motor on his 710 and that car was flying!!!(running it about 210 degrees)
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Old 04-04-2005, 09:44 PM   #295
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Quote:
Originally posted by Marcos.J
Hey Austin i watched Mark (1fastserpent) race today with that motor on his 710 and that car was flying!!!(running it about 210 degrees)
man, i no i just got done breaking it in and it is faster than my rody v12, and it stays cool at 200 degrees.
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Old 04-05-2005, 05:06 AM   #296
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I heard that the .21 crankshaft problem is still not completely solved.....
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Old 04-05-2005, 09:34 AM   #297
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On the ZX21? Oh no like what else?
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Old 04-05-2005, 09:58 AM   #298
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Quote:
Originally posted by M7H
I heard that the .21 crankshaft problem is still not completely solved.....
M7H,

After the recall and replacement with the new crankshaft, we haven't receive any report about this issue, or other issues. If you have any problem please advise

Thanks

Paolo Morganti
Serpent USA
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Old 04-05-2005, 02:17 PM   #299
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Quote:
Originally posted by Paolo M
M7H,

After the recall and replacement with the new crankshaft, we haven't receive any report about this issue, or other issues. If you have any problem please advise

Thanks

Paolo Morganti
Serpent USA
The problem might not be with the onroad mega ZX21, but the offroad....
I heard a story of a driver in Belgium (next to Holland) who is already using his 3rd crankshaft.....
The used materials of the crankshaft are different every time he get's a new one.....

But, I haven't seen it myself, it's just a story I've heard.......

Maybe it's a hoax......
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Old 04-05-2005, 02:50 PM   #300
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You can bet on it being a hoax. The offroad engines are only out a very short time. To break 3 cranks in that time plus them being all different???
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