Dual plugging J heads

  • timebomb33
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Re: Dual plugging J heads

28 Oct 2008 19:03
#244382
in case any body is serious about those vortex heads the guy who now handles them is ward performance.
1973 z1 2-1974z1-a,2-1975z1-b dragbikes1015cc+1393cc, 1977kz1000,1978kz1000,1981kz1000j, 1997 zx-11, 2000 z12r,1428turbo nitrous pro-mod and a shit load of parts thats all for now leader sask.,CANADA
I THINK MY POWERBAND BROKE

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  • PLUMMEN
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Re: Dual plugging J heads

28 Oct 2008 20:13
#244402
that is so far outside of the realm of anything my pacemaker or wallet could begin to handle!:laugh:
Still recovering,some days are better than others.

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  • tachrev
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Re: Dual plugging J heads

29 Oct 2008 12:06
#244492
APE Jay wrote:
The Vortex ii with Titanium Intakes and stainless exhaust, all assembled, ready to install, goes for about $3400.

This head can not be used on the street.
It is taller than a Kaw head and the frame must be modified to get it in.

It uses 48mm intake valves and 36 mm exhaust. The valve angel is changed to get them in there. The smallest top end we have been able to do was 1463cc. At that size, the intake pocket was getting uncomfortably close to the top ring groove.

In order to close those valves, it used very expensive valve springs that are good for about one weekend at the track.

The "as cast" intake ports are so big that you have to leave the line at near 10,000 rpm to keep from bogging it. It will run seven second ET without any porting.

I will try to e-mail you a photo of the customers head.

Jay
Figured it was a serious piece, but that answers a lot of questions for me.
1977 Kawasaki KZ1000 : Street/Strip
Build Thread

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  • Bad Kaw
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Re: Dual plugging J heads

29 Oct 2008 19:11
#244550
APE Jay,
Yeah man, ditto that (tachrev's post) for me; lots of things that I had suspected, but didn't know for sure. Basically I just figured it was too radical and you cleared up as to "why". Thanks again for the scoopage!
-KR
78 Kawasaki Z1R
81 Kawasaki KZ1000J (mods)
82 Kawasaki ELR Clone (1000 J)
82 Kawasaki KZ750R1/GPz750 ELR-ed
70 Kawasaki KV75
83 Honda CB1100F (few mods)
79 Suzuki GS1000 (rolling frame / project / junk)
84 Suzuki GS1150ES (modified project)
83 Yamaha XJ900R (project / junk)

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  • APE Jay
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Re: Dual plugging J heads

07 Nov 2008 16:56 - 07 Nov 2008 16:57
#246127
Dual plugged J head.


[img
Last edit: 07 Nov 2008 16:57 by APE Jay.

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  • timebomb33
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Re: Dual plugging J heads

07 Nov 2008 17:04
#246131
what size and heat range are the second set of plugs normally used when you do this jay.
1973 z1 2-1974z1-a,2-1975z1-b dragbikes1015cc+1393cc, 1977kz1000,1978kz1000,1981kz1000j, 1997 zx-11, 2000 z12r,1428turbo nitrous pro-mod and a shit load of parts thats all for now leader sask.,CANADA
I THINK MY POWERBAND BROKE

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Re: Dual plugging J heads

08 Nov 2008 16:22
#246370
It's a 10 mm. Not sure of the heat range.

Jay

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  • darmahsd
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Re: Dual plugging J heads

09 Nov 2008 18:06
#246549
Were you able to find out where your customer had it done, Jay?

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Re: Dual plugging J heads

10 Nov 2008 15:24
#246671
Not yet. He is in Japan. I will ask him next time he is here.

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  • GPzephyr
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Re: Dual plugging J heads

12 Nov 2008 14:15
#247084
I'm of the understanding that the Zephyr 1100 head bolts straight on and that is dual plug from the factory. Haven't any more details on sadly, just something that someone mentioned a short while back to me. Be good if its true.B)
1991, Zephyr 750. GPz750 turbo engine, 810cc, Garrett T25 turbo, GPz1100 throttle bodies, 310cc injectors, Power commander, Dyna coils, Lots more as well...

KB Saturn fitted with a stock GPz750 turbo engine. Loads to do on this project.

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  • Bad Kaw
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Re: Dual plugging J heads

13 Nov 2008 20:46
#247280
Yes, that Zeph-head would make things interesting.
78 Kawasaki Z1R
81 Kawasaki KZ1000J (mods)
82 Kawasaki ELR Clone (1000 J)
82 Kawasaki KZ750R1/GPz750 ELR-ed
70 Kawasaki KV75
83 Honda CB1100F (few mods)
79 Suzuki GS1000 (rolling frame / project / junk)
84 Suzuki GS1150ES (modified project)
83 Yamaha XJ900R (project / junk)

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  • GPzephyr
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Re: Dual plugging J heads

14 Nov 2008 09:26
#247367
Just done a bit more homework on the Zeph head and its no go. The bolt spacing is different sadly.
1991, Zephyr 750. GPz750 turbo engine, 810cc, Garrett T25 turbo, GPz1100 throttle bodies, 310cc injectors, Power commander, Dyna coils, Lots more as well...

KB Saturn fitted with a stock GPz750 turbo engine. Loads to do on this project.

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