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Post by wasp2013 on Nov 4, 2013 12:49:24 GMT
is there a cheaper copy of the hammer zombie, if so how can you tell?
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Post by mark1scooters on Nov 4, 2013 13:08:40 GMT
is there a cheaper copy of the hammer zombie, if so how can you tell? You could ask Mathias on here as he is the man behind "Ludwig&Scherer" who manufacture the Hammerzombie exhaust  |
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Post by scooterist on Nov 4, 2013 21:07:08 GMT
is there a cheaper copy of the hammer zombie, if so how can you tell? Is it a Hammerzombie copy your after, or are you checking to see if you've been sold a copy mate.......  ? Mathias (Amazombie forum name on here) would be able to tell you straight away if one is a Genuine Hammerzombie or not, because he made or makes them.... I don't think he would know where to find you a copy one ( or "want to tell you" to be fair ).. I think he sells them in kit form, if you you want to have a go at making one yourself.... drop him a PM.... IRONICALLY.. some say the Hammerzombie is the copy.!!!  |
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Post by davet on Nov 4, 2013 21:13:41 GMT
is there a cheaper copy of the hammer zombie, if so how can you tell? See below photos. Chrome one is copy, black one original two weeks old. You can see the subtle differences. Copy needed a little bit of fettling to sit right without any stress. Original went straight on. Although both are bastards to get to the springs. Copy was on for a few weeks. No problem. However..............original was put on (no stress) and lasted five miles on the way to the dyno. Pissed off didn't come in to it especially as I'd taken a well earned and expensive day off. See third photo for poor penetration of weld. This happened recently. Obviously a faulty welding job, nothing that could be seen from the outside, so not Scooter Centres fault. Do you think they'll exchange as I've painted it?    |
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Post by Juan on Nov 4, 2013 21:58:32 GMT
Suppose you'll need to ask them but seeing as it obviously had a fault I can't see how they wouldn't.
The HZ isn't a copy of Norrie's pipe although it is based on it and has unashamedly taken the styling. Mathias will be able to tell you better what he did but I know he dissected an original NK, measured it up then, for want of a better term, de-tuned it to make it more road friendly before selling the lot onto SCK.
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Post by amazombi on Nov 4, 2013 22:23:27 GMT
Get in touch with SCK. I don't know what their response will be, as a rule they tend to solve problems like this without any fuss though.
Some years ago I tried to figure out what the best smallframe pipe was, so I took what I had and made a few phone calls to get a bit more and then spend some time on the dyno to see what worked best. In terms of peak power the NK came out best. I wasn't very happy with it's high revving character though. In the end I started trying different diffusor angles and length to bring the revs down a bit. Power stayed roughly the same, give or take 0.1 BHP or so, but in the end it got on the pipe around 1000 Rpm earlier while still revving on nicely. Which makes a huge difference on the road. The original NK pipe is based on a kart design with a longer downpipe, which sort of explains its rev happy nature. From what I was told the S-routing was first done by Mikeck, still I went for that instead of the much more sensible snail style as an hommage to NK's racing scooter of the 80ies.
If you look at the pictures of the HZ and at the pictures of the NK you will see that the segments, the angles and the diameter are completely different. The new NK is not a very good performer unfortunately.
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Post by wasp2013 on Nov 4, 2013 22:29:17 GMT
is there a cheaper copy of the hammer zombie, if so how can you tell? See below photos. Chrome one is copy, black one original two weeks old. You can see the subtle differences. Copy needed a little bit of fettling to sit right without any stress. Original went straight on. Although both are bastards to get to the springs. Copy was on for a few weeks. No problem. However..............original was put on (no stress) and lasted five miles on the way to the dyno. Pissed off didn't come in to it especially as I'd taken a well earned and expensive day off. See third photo for poor penetration of weld. This happened recently. Obviously a faulty welding job, nothing that could be seen from the outside, so not Scooter Centres fault. Do you think they'll exchange as I've painted it? |
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Post by wasp2013 on Nov 4, 2013 22:30:43 GMT
See below photos. Chrome one is copy, black one original two weeks old. You can see the subtle differences. Copy needed a little bit of fettling to sit right without any stress. Original went straight on. Although both are bastards to get to the springs. Copy was on for a few weeks. No problem. However..............original was put on (no stress) and lasted five miles on the way to the dyno. Pissed off didn't come in to it especially as I'd taken a well earned and expensive day off. See third photo for poor penetration of weld. This happened recently. Obviously a faulty welding job, nothing that could be seen from the outside, so not Scooter Centres fault. Do you think they'll exchange as I've painted it? |
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Post by wasp2013 on Nov 4, 2013 22:43:50 GMT
Get in touch with SCK. I don't know what their response will be, as a rule they tend to solve problems like this without any fuss though. Some years ago I tried to figure out what the best smallframe pipe was, so I took what I had and made a few phone calls to get a bit more and then spend some time on the dyno to see what worked best. In terms of peak power the NK came out best. I wasn't very happy with it's high revving character though. In the end I started trying different diffusor angles and length to bring the revs down a bit. Power stayed roughly the same, give or take 0.1 BHP or so, but in the end it got on the pipe around 1000 Rpm earlier while still revving on nicely. Which makes a huge difference on the road. The original NK pipe is based on a kart design with a longer downpipe, which sort of explains its rev happy nature. From what I was told the S-routing was first done by Mikeck, still I went for that instead of the much more sensible snail style as an hommage to NK's racing scooter of the 80ies. If you look at the pictures of the HZ and at the pictures of the NK you will see that the segments, the angles and the diameter are completely different. The new NK is not a very good performer unfortunately. |
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Post by scooterist on Nov 4, 2013 23:04:48 GMT
The HZ isn't a copy of Norrie's pipe although it is based on it and has unashamedly taken the styling. I`m just quoting Norrie`s AD, and the fact SIP Scootershop`s website "STILL" advertise the HZ as "The Norrie Kerr is back..." The "Based on it and unashamedly taken the styling" comment, surely makes the chrome one in Davet `s pictures totally legit then as just a lookalikey... And as long it isn't marketed or sold as the real deal.. Whatever the real deal/original pipe is or was... ?? all a bit confusing |
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Post by amazombi on Nov 5, 2013 5:24:48 GMT
I was as much there when the HZ was born as you can possibly be. One mate was with me. His name isn't SIP, so I'm not sure how they (or anybody else) would know. As for NK's add and the HZ: look at the pictures and decide for yourself. I can't see a single angle or length, or a segment, were they are the same. A pipe is characertised by the angles and length and diameters of all it's diffusors, bellys and baffles, not by it's shape. An VSP race is not an S & S which is not a Franz which is not a PM which is not a Taffspeed/Mikeck just because they all share the curly look. It's a bit like a BMW, a Peugeot and a Porsch. At first glance they all have 4 whells and all are cars, but once you're into cars you'll realise that they are not at all identical.
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Post by ozoap on Nov 5, 2013 7:20:37 GMT
Spelling!!!  |
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Post by eean on Nov 5, 2013 7:37:43 GMT
They should sort that for you, they have a manufacturing problem there, Ive just repaired someones on here that same segment snapped, I have to say whatever the fuck metal it is its VERY thin and the weld was like solder
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Post by amazombi on Nov 5, 2013 14:00:37 GMT
Spelling!!! Fuck, that blunder has just kicked me off their free-Sportscar-for-gitt programme. Well, I don't think they look all that cool with a tow hook and a children seats anyway. |
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Post by davet on Nov 5, 2013 20:42:16 GMT
Now that made me chuckle. It's like an Englishman not being able to spell 'beer'. When sober obviously.
Good news and excellent customer service from SCK. Instant reply to email with return post label to send exhaust back to them.
I tend to agree that the original Hammerzombie has little in common with the NK other than a sort of reversed 's' shape and a way to package an exhaust in a tight space. After all it's been done for years with any type of technological advancement. There's a big difference between blatant copy and taking an initial concept and putting your own significant twist (no pun intended) on it.
Happy days for us all.
I remembered where I got the copy from and it was Worb5 in 2008. If you haven't read my other posts, I also got a Franz (copy, I wasn't to know either wasn't original) which was completely shite.
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Post by ginch on Nov 8, 2013 2:18:20 GMT
Hi All. Planning a build and thought of starting at the end and working backwards kind of... can you tell me Amazombi what are the preferred port timings for the HammerZombie exhaust? I've asked Scooter-Center and they acknowledged the question but never answered it. No cylinder as yet and intending rotary valve build.
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Post by jbcollier on Nov 8, 2013 3:57:38 GMT
I have to say it works well with a rotary M1: lots of bottom end, really turns on about 6K but does taper off quickly starting at 9ishK
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Post by davet on Nov 8, 2013 19:44:09 GMT
Hi All. Planning a build and thought of starting at the end and working backwards kind of... can you tell me Amazombi what are the preferred port timings for the HammerZombie exhaust? I've asked Scooter-Center and they acknowledged the question but never answered it. No cylinder as yet and intending rotary valve build. I'm running a malossi with 192 exhaust, 205 inlet and 124 transfers. 30mm phbh on rotary inlet. Hp4 flywheel pk electronic ignition on standard malossi timing. Hope this helps. |
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Post by ginch on Nov 9, 2013 1:02:11 GMT
Hi All. Planning a build and thought of starting at the end and working backwards kind of... can you tell me Amazombi what are the preferred port timings for the HammerZombie exhaust? I've asked Scooter-Center and they acknowledged the question but never answered it. No cylinder as yet and intending rotary valve build. I'm running a malossi with 192 exhaust, 205 inlet and 124 transfers. 30mm phbh on rotary inlet. Hp4 flywheel pk electronic ignition on standard malossi timing. Hope this helps. Thanks Davet. Any idea what sort of power you're getting out of it? |
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Post by davet on Nov 9, 2013 16:06:17 GMT
Don't know yet. Exhaust broke on way to dyno. Typical two stoke, few revs to go, then as revs rise decent power with a little over rev. Will post video and results when visited.
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