Cam clearance on different on GPZ head than KZ1000

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11 Jul 2015 15:44 #680426 by tomsbadkz
Cam clearance on different on GPZ head than KZ1000 was created by tomsbadkz
I have read about clearancing lifter bores and cam covers. Is the any difference on the highest lift allowed before clearancing is required on the 83-84 GPZ1100 head compared to 73-80 KZ1000 head? Make sense?
1977 kz1327
Cavanaugh Head 38.6/33
38mm Flatslides
MRE racecut trans
300mm rear tire
Web Cams 435/465

1984 GPZ1100
Cavanaugh Head
1170cc
Web 415 cams
RC Hp Inj.
Bored throttle bodies

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  • SWest
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  • 10 22 2014
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11 Jul 2015 21:28 #680467 by SWest
Replied by SWest on topic Cam clearance on different on GPZ head than KZ1000
Are you asking about installing bigger cams?
Steve
Z1b1000 1975 Z1b
kzrider.com/forum/11-projects/598262-kz-...-will-it-live#672882
kzrider.com/forum/2-engine/597654-poser?start=240#704229

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11 Jul 2015 21:33 #680468 by DFIGPZ
Replied by DFIGPZ on topic Cam clearance on different on GPZ head than KZ1000
all depends on what cams you are using.
1984 750 Turbo

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12 Jul 2015 03:43 #680489 by tomsbadkz
Replied by tomsbadkz on topic Cam clearance on different on GPZ head than KZ1000
DFIGPZ, I sent you a pm earlier.
1977 kz1327
Cavanaugh Head 38.6/33
38mm Flatslides
MRE racecut trans
300mm rear tire
Web Cams 435/465

1984 GPZ1100
Cavanaugh Head
1170cc
Web 415 cams
RC Hp Inj.
Bored throttle bodies

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12 Jul 2015 03:46 #680490 by tomsbadkz
Replied by tomsbadkz on topic Cam clearance on different on GPZ head than KZ1000
Web Cams 465/435 w/ 1.00 b.c.
1977 kz1327
Cavanaugh Head 38.6/33
38mm Flatslides
MRE racecut trans
300mm rear tire
Web Cams 435/465

1984 GPZ1100
Cavanaugh Head
1170cc
Web 415 cams
RC Hp Inj.
Bored throttle bodies

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  • SWest
  • Offline
  • Sustaining Member
  • 10 22 2014
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12 Jul 2015 06:03 #680498 by SWest
Replied by SWest on topic Cam clearance on different on GPZ head than KZ1000
Pretty aggressive cams. Overbore? Different pistons?
Steve
Z1b1000 1975 Z1b
kzrider.com/forum/11-projects/598262-kz-...-will-it-live#672882
kzrider.com/forum/2-engine/597654-poser?start=240#704229
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12 Jul 2015 06:41 - 12 Jul 2015 06:48 #680502 by Old Man Rock
Replied by Old Man Rock on topic Cam clearance on different on GPZ head than KZ1000
Pretty much the answer is yes....
NOTE: As mentioned pending which cam you're speaking of...

Keep in mind, go too big and you need to go under bucket shims so mods required.

Another example, '78KZ1000 head in my build using GPZ1100 cams... Lobes longer so have to mod. (Top 5 images)

1976 KZ900-A4
MTC 1075cc.
Camshafts: Kawi GPZ-1100 .375 lift
Head: P&P via Larry Cavanaugh
ZX636 suspension
MIKUNI, RS-34'S...
Kerker 4-1, 1.5" comp baffle.
Dyna-S E.I.
Earls 10 row Oil Cooler
Acewell 2802 Series Speedo/Tach
Innovate LC1 Wideband 02 AFR meter

Phoenix, Az
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Last edit: 12 Jul 2015 06:48 by Old Man Rock.

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12 Jul 2015 07:16 #680503 by TexasKZ
Replied by TexasKZ on topic Cam clearance on different on GPZ head than KZ1000
I am pretty sure that the op is asking if the GPz1100 head and cam cover need to be clearanced for the cams he will use, in the same way that a KZ head would.
1982 KZ1000 LTD parts donor
1981 KZ1000 LTD awaiting resurrection
2000 ZRX1100 not ridden enough

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  • SWest
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  • 10 22 2014
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12 Jul 2015 07:21 #680504 by SWest
Replied by SWest on topic Cam clearance on different on GPZ head than KZ1000
They would, wouldn't they?
Steve
Z1b1000 1975 Z1b
kzrider.com/forum/11-projects/598262-kz-...-will-it-live#672882
kzrider.com/forum/2-engine/597654-poser?start=240#704229

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  • SWest
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  • 10 22 2014
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12 Jul 2015 07:22 #680505 by SWest
Replied by SWest on topic Cam clearance on different on GPZ head than KZ1000
I take that back. Put them in and see for yourself.
Steve
Z1b1000 1975 Z1b
kzrider.com/forum/11-projects/598262-kz-...-will-it-live#672882
kzrider.com/forum/2-engine/597654-poser?start=240#704229

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12 Jul 2015 09:13 #680518 by tomsbadkz
Replied by tomsbadkz on topic Cam clearance on different on GPZ head than KZ1000
bored? yes. 1327 big block 10.5 to 1. head done by LarryC. 84 zn1100 head with 38.6 intakes and 33 exhaust. tianium reatainers with MTC shim under buckets, flowing 107cfm. KZ bottom end with Falicon 16 tooth crank.
1977 kz1327
Cavanaugh Head 38.6/33
38mm Flatslides
MRE racecut trans
300mm rear tire
Web Cams 435/465

1984 GPZ1100
Cavanaugh Head
1170cc
Web 415 cams
RC Hp Inj.
Bored throttle bodies

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12 Jul 2015 11:58 #680529 by TexasKZ
Replied by TexasKZ on topic Cam clearance on different on GPZ head than KZ1000
On the J head, anything over about .395 lift on a standard base circle (1.10) will need additional clearance in the follower bores and on the cam cover ribbing. I suspect that the GPz has the same clearance problems, though his cams have a smaller base circle, so I dunno.
1982 KZ1000 LTD parts donor
1981 KZ1000 LTD awaiting resurrection
2000 ZRX1100 not ridden enough

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