Reasonable Dyno results?

  • Mkosharkii
  • Mkosharkii's Avatar Topic Author
  • Offline
  • User
  • User
    Registered
  • Posts: 3
  • Thanks: 0

Reasonable Dyno results?

25 Mar 2010 23:34
#356232
Just got back from a 6 month deployment on a submarine and finally have some time on my hands.
Right before I deployed, I had the bike dynoed at a local shop. I'll get around to posting the scans, but the peak horsepower was 90 on the dot. My bike is a 79 1000 LTD with the following mods: 10.25/1 1075cc, Mikuni VM29's w/ pods, APE .410 cams and springs, and a Kerker 4-1 w/ baffle. From your guys experience, does 90hp at the wheel seem right?
Thanks in advance for the advice.

Please Log in or Create an account to join the conversation.

  • will61310
  • will61310's Avatar
  • Offline
  • User
  • User
    Registered
  • Posts: 274
  • Thanks: 6

Re: Reasonable Dyno results?

25 Mar 2010 23:58
#356234
I had an 1166 GPZ 1100 with headwork and 36 mm flatslides and a kerker that only did 110,so that sound about right to me..
...1980 LTD 1000...

Please Log in or Create an account to join the conversation.

  • Mcdroid
  • Mcdroid's Avatar
  • Offline
  • User
  • User
    Registered
  • Gone Kwackers
  • Posts: 6778
  • Thanks: 417

Re: Reasonable Dyno results?

26 Mar 2010 02:14
#356241
yep...90 at the RW sounds good.
Michael
Victoria, Texas

1982 GPz750
1977 KZ1000A
1978 KZ1000A
1982 GPz1100
1975 Z2A

Please Log in or Create an account to join the conversation.

  • larrycavan
  • larrycavan's Avatar
  • User
  • User
    Public
  • Thanks: 0

Re: Reasonable Dyno results?

26 Mar 2010 03:58
#356244
90 is a realistic number with those mods. Stock would have been about 65.

Please Log in or Create an account to join the conversation.

  • trianglelaguna
  • trianglelaguna's Avatar
  • Offline
  • User
  • User
    Registered
  • New and improved - extra strength
  • Posts: 8030
  • Thanks: 235

Re: Reasonable Dyno results?

26 Mar 2010 04:48
#356253
funny ...just reading up on the bike i picked up and kawi lists 92 stock....to bad...sounded too good to be true.........
1976 KZ900
2003 ZX12R
2007 FZ1000
2004 ninja 250R for wife

Please Log in or Create an account to join the conversation.

  • Old Man Rock
  • Old Man Rock's Avatar
  • Offline
  • User
  • User
    Registered
  • Posts: 6074
  • Thanks: 225

Re: Reasonable Dyno results?

26 Mar 2010 05:28
#356267
Low to mid 90's yup, sounds about right....

"just reading up on the bike i picked up and kawi lists 92 stock....to bad...sounded too good to be true"...

Rear wheel or crankshaft numbers...;)
Larry and I spoke of this many moons ago pre-engine build and expected numbers... As in the example of the front of our service manuals gives torque and HP graphs.... The numbers for a stock 900 or ~ 80ish.... Those are Crankshaft numbers, not rear wheel....

Out of curiosity, what torque numbers came out of your Dyno run?

OMR
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

Please Log in or Create an account to join the conversation.

  • otakar
  • otakar's Avatar
  • Offline
  • User
  • User
    Registered
  • Posts: 5073
  • Thanks: 29

Re: Reasonable Dyno results?

26 Mar 2010 06:24
#356280
You can change the HP#s just by changing your rear sprocket. As OMR said, it is the torque #s that tell the story.
74 Z1-A stock
76 KZ-900 Totaly stock vice MAC pipe
77 KZ-1000A stock
78 Z1-R 100%MINT 500 original Mi.
78 Z1-R Yoshi 1103 kit stage 1 cams Yoshi pipe. Etc
79 KZ-1300 (1400)
80 KZ-1300
81 Scratch built GPz1150R
82 KZ1000

Please Log in or Create an account to join the conversation.

  • otakar
  • otakar's Avatar
  • Offline
  • User
  • User
    Registered
  • Posts: 5073
  • Thanks: 29

Re: Reasonable Dyno results?

26 Mar 2010 06:26
#356281
If you put a stock Harley 1200 on a dyno, t will read about 45hp but the torque will be off the chart.
74 Z1-A stock
76 KZ-900 Totaly stock vice MAC pipe
77 KZ-1000A stock
78 Z1-R 100%MINT 500 original Mi.
78 Z1-R Yoshi 1103 kit stage 1 cams Yoshi pipe. Etc
79 KZ-1300 (1400)
80 KZ-1300
81 Scratch built GPz1150R
82 KZ1000

Please Log in or Create an account to join the conversation.

  • Jack
  • Jack's Avatar
  • Offline
  • User
  • User
    Registered
  • Posts: 703
  • Thanks: 7

Re: Reasonable Dyno results?

26 Mar 2010 06:49
#356286
trianglelaguna wrote:
funny ...just reading up on the bike i picked up and kawi lists 92 stock....to bad...sounded too good to be true.........

They left out MEASURED AT THE CRANK. RWHP will be less every time...
79 KZ 1075 MKll
79 KZ 1500 MKll dragbike
Gone but not forgotten:
3 X 73 Z1's
1 X 74 Z1A
1 X 75 Z1B

Please Log in or Create an account to join the conversation.

  • otakar
  • otakar's Avatar
  • Offline
  • User
  • User
    Registered
  • Posts: 5073
  • Thanks: 29

Re: Reasonable Dyno results?

26 Mar 2010 07:04 - 26 Mar 2010 08:17
#356288
My 1150 "J" motor with .420 intake and .410 exhaust heavily ported 84 GPZ head is geared for top end I am putting a 40/18 (2.28:1) final drive ratio on it. A properly geared 750 would be able to jump away from it in a hole shot. But once we start to get any speed I will have the advantage all the way. Standard rear ratios for Kawasaki was 39/15 (2.6:1) for cruisers and 41/15 (2.73:1) for hi-performance bikes. some drag racers use 46/14 (3.29:1)
74 Z1-A stock
76 KZ-900 Totaly stock vice MAC pipe
77 KZ-1000A stock
78 Z1-R 100%MINT 500 original Mi.
78 Z1-R Yoshi 1103 kit stage 1 cams Yoshi pipe. Etc
79 KZ-1300 (1400)
80 KZ-1300
81 Scratch built GPz1150R
82 KZ1000
Last edit: 26 Mar 2010 08:17 by otakar.

Please Log in or Create an account to join the conversation.

  • larrycavan
  • larrycavan's Avatar
  • User
  • User
    Public
  • Thanks: 0

Re: Reasonable Dyno results?

26 Mar 2010 16:52
#356371
otakar wrote:
My 1150 "J" motor with .420 intake and .410 exhaust heavily ported 84 GPZ head is geared for top end I am putting a 40/18 (2.28:1) final drive ratio on it. A properly geared 750 would be able to jump away from it in a hole shot. But once we start to get any speed I will have the advantage all the way. Standard rear ratios for Kawasaki was 39/15 (2.6:1) for cruisers and 41/15 (2.73:1) for hi-performance bikes. some drag racers use 46/14 (3.29:1)

900 / 1000 KZ's were 35/15 while LTD's were 33/15.

39/15 gearing on a KZ 1000 is for wheelies... :laugh:

Your gearing is for traveling very fast with a built motor like that. I keep wishing I had a 6 speed trans in my bike... :)

Please Log in or Create an account to join the conversation.

  • turboguzzi
  • turboguzzi's Avatar
  • Offline
  • User
  • User
    Registered
  • Posts: 842
  • Thanks: 72

Re: Reasonable Dyno results?

26 Mar 2010 17:15
#356373
otakar wrote:
You can change the HP#s just by changing your rear sprocket. As OMR said, it is the torque #s that tell the story.

have to disagree, hp is purely a function of the work the engine performs in a given time, its unrelated to gearing.

In any case, 90 sounds good to me too.

TG

Please Log in or Create an account to join the conversation.

Moderators: Street Fighter LTD
Powered by Kunena Forum