117 Dyno Results

[K9husker]

Everyone:
I have attached a dyno sheet that shows some fairly respectable numbers. Testing was taking in Nebraska at 2,800 ft of elevation.

The baseline numbers are a 117 with a S&S 600 cam, XXX Carb, V&H 2 into 1 pipe, and powerpacc carb backing plate.

The new results are after changing to a woods 650 cam and springs, Hooker Fourbidden pipe, zero deck height, and Thunderheart Ignition.

A note worth mentioning, is we dyno'ed the bike using the 3, 4, and 5 settings on the ignition and it showed only a small difference between the 4 and 5 but it did not like the 3 at all.
These are numbers with the air filter on, we did gain 3 hp and 2 tq by taking off the air filter

The dyno guy did say the dip is due to the engine needing more back pressure and the normal problems associated with running an Super g carb.

Life's good, run's great

K9 Husker

 

[MARV]

sounds like a blast to ride. :up:

so he doesnt think the 4-biddens gave good backpressure?

also just zero deck gave you 10.5-1? no head shave?

what woods cam? W9F?

 

[K9husker]

The fourbidden's do give some back pressure, but the 90% of the dip is the large bore super g carb. I did use the WF9 cam. What i found the best out of this entire improvement is the close to 20ft of tq I gained in the 2,000-3,000 rpm range as well as having over 100ft tq at 2,000 rpm. The xxx carb is jetted 31/78 and fuel/air readings are right on.

 

[K9husker]

oops forgot to mention i took the cyclinders to zero deck and also took .020 off the heads

 

[K9husker]

I should mention that the Bandit clutch worked perfectly. During installation we did add 2 shims under the springs to be safe and it worked perfect! As far as the timimg goes we ended setting the box at 4 to be safe

 

[V]

Sweet:2thumbs:

 

[barhopper]

Very nice. Now just turn it and burn it.

 

[K9husker]

After hitting and missing alot of points on this post lets sum up what it takes to get 120hp and 130tq or better at a lower altitude on a 2006 117

zero deck removing all the material from the top of the cylinder
take another .020 off the heads to get 10.5 compression
Bob Wood 650 cam and springs
XXX Super G carb 31/78 jets
Powerpacc carb backing plate and filter
A good exhaust...Hooker or something like that
Thunderheart Ignition set at #4
Bandit Clutch to get it all to the ground

Hope this helps save someone some time or money

 

[alhall88]

What did your heads cc at ? What size valves did you end up with. I shaved very little off my heads and went with a positive deck (+.010). I also went with the W9F cam and after the head mods they cc'd at 90.2 . I ended up at 10.8 comp. When I clayed the motor up we only had .058 piston to valve clearance so thats about all I could take off. I need a dyno as well but my ass says its pretty good. About the only difference in our builds may be the exhaust and comp. ratio. I hope to see some numbers like yours, have fun.

 

[MARV]

the 3 of us sound pretty close in build.

deck height of .015 in the hole
.060 off the heads
valve job and porting
S&S 640 cam
2KI adj ignition
PSI carb
BMF pipe

just picked up a W9F to play with this winter

need to get a LSR 2-1 :up:

 

[john sachs]

Prolly the best way to sum up compression comparison(also takes altitude into consideration),would be to disconect the compression releases,and take a cold cranking compression test.Open the throttle all the way,and crank the motor till the gauge won't go any higher.
John
BTW......... Nice dyno.

 

[MARV]

Prolly the best way to sum up compression comparison(also takes altitude into consideration),would be to disconect the compression releases,and take a cold cranking compression test.Open the throttle all the way,and crank the motor till the gauge won't go any higher.
John

didnt CC my heads when cut but figure they are at approx 82.5 CC

did a CCP and got 206 psi each.

think i'm a bit higher than 10.8-1

can you calculate compression with a CCP test results?

 

[alhall88]

need to get a LSR 2-1 :up:

Your not getting mine this time

 

[john sachs]

Marv,
What cam is in the motor with 206 cranking ? throttle WFO ? comp.releases disconnected ?
Answers,and I should be able to give you a comp. ratio.
John

 

[MARV]

deck height of .015 in the hole
.040 head gasket
.060 shaved off the heads
valve job and porting
S&S 640 cam
2KI adj ignition
PSI carb
BMF pipe
206 ccp

S&S 640
didnt unplug the releases but BD manual says they shut after 1 second. throttle wide open.

 

[john sachs]

Marv,
The answer is ................... 11.90:1 static !!!!!!!!!!!!!!!!!!
Corrected( after factoring in cam 60 degree intake close) 9.80:1
Be careful will be detonation prone on pump gas,especially when hot.
John
Soooooooooooo when one asks what's your compression ratio,the answer is 11.90:1

 

[K9husker]

My heads cc'd at 83cc after milling and were 90cc prior to milling. Other than the mill job of .020 off the heads, are stock except for the springs. Cylinder height ended at 4.900 after milling. I would guess that if you take .040 in any combination off the heads or cylinders either way you still get there. The secret is you need a good tech that has a depth mic to measaure the deck height and make sure you don't get the piston sticking out of the cylinder. I have been screwing around with this bike for almost 3 years now and have tried alot of pipes, carb settings, cams etc. and this by far is the best so far. This bike wants to pull your hands off the grips! I raced a headquarters 113 and it was embarrasing how far behind he was. I'm not sure what i will do next cause the bike runs real smooth, real strong, and is still very reliable. Not to mention the woody i get riding it around

 

[MARV]

was just doing the calcs on Beans site and looks like my heads must be a lower cc volume then i thought! maybe 78cc. should of had them measured. :bang:

but no wonder this 640 cam grabs so quick.

got it timed at 28 and the plugs look good.

 

[alhall88]

Sometimes sticking a piston above the cylinder is intentional due to combustion chamber modifications wanted that would allow this. We played with this several ways on my build. As long as you can keep close to that .060 magic number between piston and valve contact.

 

[stlmikie]

So you have the 117 as well I take it?

What did your heads cc at ? What size valves did you end up with. I shaved very little off my heads and went with a positive deck (+.010). I also went with the W9F cam and after the head mods they cc'd at 90.2 . I ended up at 10.8 comp. When I clayed the motor up we only had .058 piston to valve clearance so thats about all I could take off. I need a dyno as well but my ass says its pretty good. About the only difference in our builds may be the exhaust and comp. ratio. I hope to see some numbers like yours, have fun.