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Author Topic: "Tangerine Dream" / Glemseck - KZ750  (Read 155713 times)

Offline teazer

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Re: "Tangerine Dream" / Glemseck - KZ750
« Reply #790 on: Mar 31, 2019, 17:07:58 »
A trick you are probably familiar with is to machine the plug recess so that the electrodes are just outside the combustion chamber and they 'fire" through a slot to minimize weakening the head around the valve seats.  A better idea is to allow the plug electrodes to intrude into the head - as long as you can clear the valves.  Kawasaki did that on the Eddie Lawson S1 KZ1000 heads

Offline beachcomber

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Re: "Tangerine Dream" / Glemseck - KZ750
« Reply #791 on: Apr 01, 2019, 08:21:54 »
A trick you are probably familiar with is to machine the plug recess so that the electrodes are just outside the combustion chamber and they 'fire" through a slot to minimize weakening the head around the valve seats.  A better idea is to allow the plug electrodes to intrude into the head - as long as you can clear the valves.  Kawasaki did that on the Eddie Lawson S1 KZ1000 heads

Yep - thanx for the headsup, when the plugs have been indexed to align the electrode "gap" they'll also get the treatment you suggest.

That's something I used to do with the Triumph head / plugs. No perceivable difference [ no dyno access in those days ! ] in performance - but NEVER had a failure due to pre-ignition or plug related - as in mechanical damage. Since I had a spate of issues with Champion plugs in the early sixties I switched to NGK when they became readily available in the UK - NEVER had mechanical issues with the plugs since and I found they are more tolerant of heat ranges.

I'm going to alter the flame propagation flow - you might just be able to see a shoulder in the chamber that directs the fuel towards the OEM plug site. That needs to be re-worked to get the mixture to the 2nd plug asap.

I'll get the head beadblasted as soon as the compressor / cabinet is up and running and it will be a little clearer.

Once the ass'y comes back from the welder I'll start work on the head / engine.

My machinist guy is going to make another long Weber intake manifold for me as the one I currently have needs a lot of fettling.
"if at first you don't succeed, you've already been a failure once"

" we're not going back to the sixties - we never left "

"yep, nostalgia ain't what it used to be"

"I used to be indecisive - now I'm not so sure"

Offline Nebr_Rex

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Re: "Tangerine Dream" / Glemseck - KZ750
« Reply #792 on: Apr 01, 2019, 20:58:13 »
A trick you are probably familiar with is to machine the plug recess so that the electrodes are just outside the combustion chamber and they 'fire" through a slot to minimize weakening the head around the valve seats.  A better idea is to allow the plug electrodes to intrude into the head - as long as you can clear the valves.  Kawasaki did that on the Eddie Lawson S1 KZ1000 heads

I thought Mr. Muzzy modified the heads.


.

Offline teazer

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Re: "Tangerine Dream" / Glemseck - KZ750
« Reply #793 on: Apr 01, 2019, 23:23:17 »
Mr. Rex, you may well be correct.  I'm not sure who actually did the heads on Lawson's bikes.  Kawasaki had all sorts of secret parts and Muzzy did a whole lot of secret work, but who actually did what is not something I know.  Above my classification level.  That's all "need to know", "compartmentalized" top secret race stuff.  ;-)

Beach: On our high comp Honda race heads we invariably end up with fire notches in the piston crown and try to get an angled squish band like a 2 smoke to push gas into the fire pit and of course you want the lowest crown and combustion chamber possible.

Much as I like the look of Weber carbs, in this day and age, I'd probably go with flatside carbs or EFI if you can get some huge throttle bodies and use a Megasquirt or similar to drive it all. MoTeC would be nice but a touch spendy. I wonder if it's possible to get an off teh shelf EFI controller for say a modern 650 twin and completely re-program it with TuneBoy or something similar.  That would make for a much more rideable bike and way easier to Dyno tune.

Offline beachcomber

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Re: "Tangerine Dream" / Glemseck - KZ750
« Reply #794 on: Apr 02, 2019, 09:13:03 »
Teazer, regrettably I am not of the modern age and I am totally out of my comfort zone with EFI, computers etc ! :o

Of course I am well aware of the advantages to be gained, but this is an old school do it yourself as cheap as possible [ of necessity ] build.

The Weber cost me 45 and it's been overhauled - OK, it's unlikely that the jets, tubes etc will be on the money out of the box - but I have large stockpile of Weber parts, jets, etc from my early racing days. I also got 2 good basic bodies and tubes for spares in with the 45 .... no brainer for me.

Then there's the "let's all be different together" school of thought. I always like to try something a bit off the wall. Not sure you'll ever see another KZ750 equipped with a Weber !! Maybe you wouldn't want to - but I guarantee it will get folk talking. ;)
"if at first you don't succeed, you've already been a failure once"

" we're not going back to the sixties - we never left "

"yep, nostalgia ain't what it used to be"

"I used to be indecisive - now I'm not so sure"

Offline beachcomber

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Re: "Tangerine Dream" / Glemseck - KZ750
« Reply #795 on: Apr 10, 2019, 10:16:18 »
Finally .... through no fault of anyone - the fuel cell mods / welding have been completed.

Note to others using the tried and tested CAD approach [ cardboard aided design ] - cardboard is easily deformed - not clever when you're trialing it under something heavy !!!

Perfect fit now. I'm trying to persuade the same guy to weld up my exhaust. His day job is making Brough Superior frames !!!! So he should be up to the task.
"if at first you don't succeed, you've already been a failure once"

" we're not going back to the sixties - we never left "

"yep, nostalgia ain't what it used to be"

"I used to be indecisive - now I'm not so sure"

Offline Maritime

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Re: "Tangerine Dream" / Glemseck - KZ750
« Reply #796 on: Apr 10, 2019, 11:22:29 »
Nice!
The GL Rebirth: http://www.dotheton.com/forum/index.php?topic=68337.0
CX500 Low budget Bobber : http://www.dotheton.com/forum/index.php?topic=43617.0
"Beer makes you feel the way you ought to feel without beer" -Henry Lawson
"Beer is proof that God loves us and wants us to be happy." - Thomas Jefferson

Online Jimbonaut

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Re: "Tangerine Dream" / Glemseck - KZ750
« Reply #797 on: Apr 10, 2019, 14:36:45 »
Very!
"I'm telling you Donnie, nuthin' but nuthin' but right"

Offline beachcomber

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Re: "Tangerine Dream" / Glemseck - KZ750
« Reply #798 on: Apr 10, 2019, 16:22:58 »
Thanx fellas .....  ;)

Just in case you're not aware - the tank is the work of Uncle Rob  8) [ UK / DTT ] who fitted me in with his hectic schedule of bike and tank building to produce that beauty. Also, for anyone coming late to the party - it will live under the frame in a belly pan fairing. The Manx dummy tank is where all the NOS and other squitter will live. I want to keep the NOS as stealthy as possible. Talking of the NOS - couldn't resist posting this again. And for the knowledgeable - yes the injectors are arse about face in the pic .... but they're there courtesy of gravity - and the correct way round they kept falling off. I'll do something more permanent eventually! In the first pic - the belly pan was roughly fitted as POC - now moved back to be more aesthetically pleasing ! ::). There will be a stainless mesh at the front to allow air though - but keep rocks out. We'll be making a guard of some sort at the rear to protect the fuel fittings - again from rocks etc. thrown up by the back wheel.
"if at first you don't succeed, you've already been a failure once"

" we're not going back to the sixties - we never left "

"yep, nostalgia ain't what it used to be"

"I used to be indecisive - now I'm not so sure"

Online Jimbonaut

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Re: "Tangerine Dream" / Glemseck - KZ750
« Reply #799 on: Apr 10, 2019, 16:52:54 »
Yup, I want a belly pan too now.
"I'm telling you Donnie, nuthin' but nuthin' but right"