Author Topic: Post your Dyno Graphs here.  (Read 40954 times)

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Offline lucky

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Re: Post your Dyno Graphs here.
« Reply #25 on: January 28, 2012, 12:35:51 pm »
Dynojet dyno,
1134cc,
71mm Honda RC45 pistons,
Honda DOHC900 crank shaft,
Honda DOHC1100 conrods,
SOHC F2 head (modified),
.400mm lift long duration cam (since changed to Megacycle 125-75 cam),
Methanol fuel.



Cheers,
Brian

Thanks for posting a file format that can be seen by all computer users.
Would you all post a JPG or a PDF file. Thanks.
Many file formats can be saved as a PDF file.

Offline lucky

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Re: Post your Dyno Graphs here.
« Reply #26 on: January 28, 2012, 12:37:03 pm »
hello friends,

there are many here enjoy to see those dyno graphs, me too.
but think of the fact, that the graphs are relatively worthless without posting some infos, such as:
sort of fuel, some technical datas, displacement,.....

mec

Exactly!

Offline OpaGreg

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Re: Post your Dyno Graphs here.
« Reply #27 on: March 21, 2012, 04:33:03 am »
the details:
1978 CB750K, 25,739 miles on the clock
Totally stock bike, all original as far as I can see except for the battery and wheel bearings
Dyno run was for evaluation just after I bought the bike
21 Feb 2012
Dynojet
Run Type: RO
Run Conditions: 58.29 degrees F, 29.98 in-Hg, Humidity 17%, SAE: 0.95
Max Power:  49.19
Max Torque: 35.88

end result right about what I would expect out of the stock setup and looks like the carbs could be adjusted a little better
Current bikes:  78 CB750K and 07 MV Agusta F41000R
Past bikes:  lots...I've been a little bit of a bike slut over time.

Offline MRieck

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Re: Post your Dyno Graphs here.
« Reply #28 on: March 21, 2012, 02:03:04 pm »
the details:
1978 CB750K, 25,739 miles on the clock
Totally stock bike, all original as far as I can see except for the battery and wheel bearings
Dyno run was for evaluation just after I bought the bike
21 Feb 2012
Dynojet
Run Type: RO
Run Conditions: 58.29 degrees F, 29.98 in-Hg, Humidity 17%, SAE: 0.95
Max Power:  49.19
Max Torque: 35.88

end result right about what I would expect out of the stock setup and looks like the carbs could be adjusted a little better
You do know if it was a K0 it would have made 65HP. ::) ::) ;) ;D 50HP is about it stock.
Owner of the "Million Dollar CB"

Offline Sam Green Racing

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Re: Post your Dyno Graphs here.
« Reply #29 on: March 21, 2012, 02:51:40 pm »
So if these old bikes loose 17bhp through the transmission, It means I have a mate who has one that makes 115bhp at the crank, hell of a jump from 67. ::)
C95 sprint bike.
CB95 hybrid race bike
CB95 race bike
CB92
RS 175. sprint/land speed bike
JMR Racing CB750A street ET drag bike

Offline MRieck

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Re: Post your Dyno Graphs here.
« Reply #30 on: March 28, 2012, 06:17:33 am »
So if these old bikes loose 17bhp through the transmission, It means I have a mate who has one that makes 115bhp at the crank, hell of a jump from 67. ::)
We'll have to see what the large engine does. Funny....I can't view my dyno chart on the is thread...at least that was the way it was last time I checked. Hmmmmmm....you cannot open/enlarge any of the charts on page one.
« Last Edit: March 28, 2012, 06:22:09 am by MRieck »
Owner of the "Million Dollar CB"

Offline bwaller

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Re: Post your Dyno Graphs here.
« Reply #31 on: March 29, 2012, 12:12:22 pm »
My dyno guy doesn't feel it's necessary to strap the rear end down. What's the feeling? I don't suppose there's much to be gained anyway on a 60 hp bike, but it sure isn't hard to do.

Offline Bill/BentON Racing

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Re: Post your Dyno Graphs here.
« Reply #32 on: March 29, 2012, 02:17:52 pm »
Our dyno guy(Brian Livengood0 always ties them down....real well!! I think it would be better all around and SAFER! My .02. Bill
BentON Racing Website
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Over 35 years of experience working on vintage motorcycles, with a speciality in Honda SOHC/4 with a focus on the CB750 and other models as well from 1966 - 1985.
______________________________________
1993 HRC RS125 | 1984 NS400R | 1974 Honda CB750/836cc (Calendar Girl) | 1972 CB 500/550 Yoshi Kitted 590cc | 1965 Honda CB450 Black Bomber | 1972 Suzuki T350 | 1973 88cc | Z50/Falcons Pit Bike | 1967 CA100| 1974 CB350 (400F motor)...and more.
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See our latest build 'Captain Marvel' CLICK HERE

Offline MRieck

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Re: Post your Dyno Graphs here.
« Reply #33 on: March 29, 2012, 07:28:16 pm »
My dyno guy doesn't feel it's necessary to strap the rear end down. What's the feeling? I don't suppose there's much to be gained anyway on a 60 hp bike, but it sure isn't hard to do.
Seen that many times Brent. Talk of reduced tire deformation etc when not tied down. I think some straps should be on there....or at least a lard ass. ;) ;D
Owner of the "Million Dollar CB"

Offline Doctor_D

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Re: Post your Dyno Graphs here.
« Reply #34 on: March 29, 2012, 08:59:19 pm »
My dyno guy doesn't feel it's necessary to strap the rear end down. What's the feeling? I don't suppose there's much to be gained anyway on a 60 hp bike, but it sure isn't hard to do.
Seen that many times Brent. Talk of reduced tire deformation etc when not tied down. I think some straps should be on there....or at least a lard ass. ;) ;D

I've only seen hopped-up 2-strokes skip the rear wheel under a dyno operator.(E.g. there's a fully-prepped Honda NSR250R in the shop that builds torque so fast the tire chatters for a second or two.)  But we've had bikes that make 200hp and half as much torque on there without strapping anything other than the forks down.  After nearly 10,000 runs on the Dynojet, there's never been a problem (touch wood).
Take care,
David
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1975 CB 750F - Project page: http://forums.sohc4.net/index.php?topic=66026.msg725479#msg725479
1978 CX500
1971 Norton Commando

Offline bwaller

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Re: Post your Dyno Graphs here.
« Reply #35 on: March 30, 2012, 03:42:46 am »
Thanks guys. Previously I had to unstrap to get outside to bump start, then idle it to get back in and strap the front down. Finally finished my roller starter which will save all that fooling.

Lard ass isn't an issue Mike, I'm the one sitting on it.  ;D  I may try a few pulls with the rear synched down some.

The only thing I notice is it seems to polish the rear tire which I thought might be traction loss, but I suppose that is likely not the case.

Offline brandEn

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Re: Post your Dyno Graphs here.
« Reply #36 on: April 28, 2012, 04:29:27 pm »
Hit the dyno today with the help of Doctor D. Thanks David! Just over 71 HP.


So I need some leaner carb slides (3.0) for my CR29's if anybody has some...


1978 CB750 F3
CR29 Carbs= Mains 110, YY7 needle-clips middle position.
DYNA 2000 ignition set at 30 Deg total advance
Wiseco 836 kit
Webcam 41a

BrandEns dyno tune @ twinline


BrandEns dyno tune @ Twinline
« Last Edit: April 28, 2012, 08:11:25 pm by brandEn »

Online Terry in Australia

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Re: Post your Dyno Graphs here.
« Reply #37 on: April 29, 2012, 04:24:47 am »
76 BHP isn't a bad result Branden, and your bike sunded pretty good too! Cheers, Terry. ;D
I was feeling sorry for myself because I couldn't afford new bike boots, until I met a man with no legs.

So I said, "Hey mate, you haven't got any bike boots you don't need, do you?"

Offline andy750

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Re: Post your Dyno Graphs here.
« Reply #38 on: April 29, 2012, 04:44:44 am »
76 BHP isn't a bad result Branden, and your bike sunded pretty good too! Cheers, Terry. ;D

I think its 71 bhp if you look at the graph. Bike did sound great though. I thought it would be slightly more though given that my K2 with stock carbs/airbox/pipes/Dyna S ignition gets 71 bhp and its an 810cc engine. Thanks for posting BrandEn and looking forward to seeing more!

cheers
Andy

Current bikes
1. CB750K4: Long distance bike, 17 countries and counting...2001 - Trans-USA-Mexico (CB750K4), 2003 - European Tour (CB750K4), 2004 - SOHC Easy Rider Trip (CB750K4), 2008 - Adirondack Tour 2-up (CB750K4) , 2013 - Tail of the Dragon Tour , 2017: 836 kit install and bottom end rebuild. And rebirth: http://forums.sohc4.net/index.php/topic,173213.msg2029836.html#msg2029836
2. CB750/810cc K2  - road racer with JMR worked head 71 hp
3. VStrom DL1000 2003
4. XLR650L 2006

Where did you go on your bike today? - http://forums.sohc4.net/index.php?topic=45183.2350

Offline Doctor_D

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Re: Post your Dyno Graphs here.
« Reply #39 on: April 29, 2012, 07:04:15 am »
We had a good time yesterday with Tige and Branden.  Beautiful bikes, both of them.  Dialed in the fuel-curve and timing, picking up a few horses, but also adding a lot of area under the curve and a bunch of useful rpm's.

For what it's worth, our dyno is pretty conservative.  I know of a few in the area that are good "ego boosters", reading 3-4% higher than ours pretty consistently.  It's all relative, so to speak.  Speaking of relative, adding almost 35% more horsepower and 25% more torque with a mild cam, and 100cc's of displacement is nothing to sneeze at.
Take care,
David
___________________________________________
1975 CB 750F - Project page: http://forums.sohc4.net/index.php?topic=66026.msg725479#msg725479
1978 CX500
1971 Norton Commando

Offline HondaMan

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Re: Post your Dyno Graphs here.
« Reply #40 on: April 29, 2012, 11:32:44 pm »
Speaking of relative, adding almost 35% more horsepower and 25% more torque with a mild cam, and 100cc's of displacement is nothing to sneeze at.


Exactly! :D
The demons are repulsed when a man does good. Use that.
Blood is thicker than water, but motor oil is thicker yet...so, don't mess with my SOHC4, or I might have to hurt you.
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Offline MRieck

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Re: Post your Dyno Graphs here.
« Reply #41 on: April 30, 2012, 07:12:07 am »
We had a good time yesterday with Tige and Branden.  Beautiful bikes, both of them.  Dialed in the fuel-curve and timing, picking up a few horses, but also adding a lot of area under the curve and a bunch of useful rpm's.

For what it's worth, our dyno is pretty conservative.  I know of a few in the area that are good "ego boosters", reading 3-4% higher than ours pretty consistently.  It's all relative, so to speak. Speaking of relative, adding almost 35% more horsepower and 25% more torque with a mild cam, and 100cc's of displacement is nothing to sneeze at.
I agree. Increasing the displacement a little over 15% and getting 35% increase in power speaks volumes. That 41 cam is very mild too....a lot more potential there for sure.
Owner of the "Million Dollar CB"

Offline Sam Green Racing

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Re: Post your Dyno Graphs here.
« Reply #42 on: April 30, 2012, 07:38:40 am »
So if these old bikes loose 17bhp through the transmission, It means I have a mate who has one that makes 115bhp at the crank, hell of a jump from 67. ::)
We'll have to see what the large engine does. Funny....I can't view my dyno chart on the is thread...at least that was the way it was last time I checked. Hmmmmmm....you cannot open/enlarge any of the charts on page one.

It don't matter if it's gone we can all vouch for the 98 rwbhp 8) 8) 8) 8) 8) 8) 8)  mine would be the same if it didn't have the TQ Con. :(

Sam. ;)
C95 sprint bike.
CB95 hybrid race bike
CB95 race bike
CB92
RS 175. sprint/land speed bike
JMR Racing CB750A street ET drag bike

Offline bwaller

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Re: Post your Dyno Graphs here.
« Reply #43 on: May 05, 2012, 07:40:54 am »
1973 CB500 street bike

591cc, (61mm pistons) 10:1CR, WebCam 58a

Mild porting, stocks valves

Stock PD46c carbs, pilot jets enlarged to #46, 107.5 mains, jet needle #3. Stock air plenum, single large K&N.

Mac header, modified midpipe, GSXR muffler


« Last Edit: May 05, 2012, 09:41:25 am by bwaller »

Offline tweakin

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Re: Post your Dyno Graphs here.
« Reply #44 on: May 12, 2012, 03:24:27 pm »
1977 cb750f
915cc
APE crank
Stage three head with 5mm conversion
Dyna 2000 @32* advance
RS34 carbs, 127.5 mains

Thanks to Doctor D and Tower at Twineline...  Still need to work out a sticky accelerator pump, but other than that its great.
I am sure there is more power hiding in there but I am happy with the K&N filters and Yamiya pipe.  Rips on the steet ;D

cb750f, 915cc Dyno run at Twineline Seattle


Offline Doctor_D

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Re: Post your Dyno Graphs here.
« Reply #45 on: May 13, 2012, 07:36:43 am »


Nice seeing what the 915 can do.  Good times.

Big lean-out on throttle opening is due to the accelerator pump plunger not fully returning, but we got the A/F ratio pretty much perfect after that. (Dashed line on the sheet is 13:1)

The bike peaks at 88 rwhp at about 8k, then HP is flat until it hits the rev limiter.  Between the cam, K&N's, head, exhaust - I'm not sure what the limiting factor is, but the motor's got a few more horses to be found.  Pull the baffle, and put 50mm stacks on it and probably 130 mains and it would likely break 90 without trying.  I'm with Tige though, it's a great, streetable bike - it's time to just ride the heck out of it.
Take care,
David
___________________________________________
1975 CB 750F - Project page: http://forums.sohc4.net/index.php?topic=66026.msg725479#msg725479
1978 CX500
1971 Norton Commando

Online 754

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Re: Post your Dyno Graphs here.
« Reply #46 on: May 13, 2012, 08:36:31 am »
 What cam is he running ? seems like a very low rpm for the peak...
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Offline tweakin

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Re: Post your Dyno Graphs here.
« Reply #47 on: May 13, 2012, 09:04:20 am »
What cam is he running ? seems like a very low rpm for the peak...
I am running the 125-75 cam

Offline Bill/BentON Racing

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Re: Post your Dyno Graphs here.
« Reply #48 on: May 14, 2012, 04:22:53 pm »
Samauto's #'s!!! ;D

1976 CB750A
915cc Cycle X kit
125/75 Megacycle cam(intake 104.5 lobe ctr)
Mike Rieck Stage VI cylinder head port job/5mm stem,2mm over intakes,
3 pc metal Cycle X headgasket
H/D cam chain
Carrillo rods
H/D bolts
Crank balanced/balls gone.
Racing valve spring kit
Ti retainers
32 mm CV's Mikuni,Dynojet Stage III,Bill and Jim Stage X
Dyna S ignition(advanced)
Dyna 3.0 Green coils
Taylor wires
MSD MC-1 ignition box w/rev limiter,analog
Oil pump MRieck massaged
Earl's oil cooler
VP Racing fuel MR12
130 mains,40 pilots,clip 3rd,no filtration/stacks
We lose 10-12 RWHP vs K,F models!!!!!!! ;) ;D
87.07RWHP on 3rd run,since went to 125's and one position leaner on needles
87.07 + 12 = 99.07!!!RWHP!!!!!!!!!!!! 8)Can't wait to see what Calendar Girl does w/915cc and Stage III head! 8)
Total Loss ignition,lightwt rotor,has elec start
Vance and Hines CB1100F sidewinder pipe(open)
We gained 8 h/p and little over 5 ft pounds torque! 8)I like the 915cc package! ;)

Stay tuned,we're going for more!! ::)Bill We thought we had 127.5's found out 130's at Valdosta! ;)
« Last Edit: May 14, 2012, 04:33:18 pm by Bill/BentON Racing »
BentON Racing Website
OEM Parts | Service | Custom Builds
BentON Racing Facebook
Over 35 years of experience working on vintage motorcycles, with a speciality in Honda SOHC/4 with a focus on the CB750 and other models as well from 1966 - 1985.
______________________________________
1993 HRC RS125 | 1984 NS400R | 1974 Honda CB750/836cc (Calendar Girl) | 1972 CB 500/550 Yoshi Kitted 590cc | 1965 Honda CB450 Black Bomber | 1972 Suzuki T350 | 1973 88cc | Z50/Falcons Pit Bike | 1967 CA100| 1974 CB350 (400F motor)...and more.
______________________________________
See our latest build 'Captain Marvel' CLICK HERE

Offline brewsky

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Re: Post your Dyno Graphs here.
« Reply #49 on: May 26, 2012, 01:05:32 pm »
Updated run 5/26/12:
CB750K8, 43,000 miles
Stock motor
Stock airbox (4 - 1'' holes drilled in rear)
K&N filter
Mac 4/1 (one run w/ moded baffle and one run with baffle removed)
112.5 mains
42 pilots
1 shim under needles
mix screw at 1 out

53.53 HP
38.04 # TQ

Picked up 2.5HP and 4# TQ since last run
Still feeling inadequate on the "high performance and racing forum"!!
66 CA77
78 550K
78 CB750K
02 FZ1
09 GL 1800