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Author Topic: Heat cycles (video)  (Read 2062 times)

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Offline Doctor_D

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Heat cycles (video)
« on: March 16, 2011, 08:28:31 PM »
My 836 is back together with the better suited 125-75 cam.  Getting it ready for dyno tuning this weekend with a heat cycle today and again tomorrow.

Thought I'd share the video.  These are Simon Tappin's pipes, for those wondering exactly how they sound or how loud they are.

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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 scottly

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Re: Heat cycles (video)
« Reply #1 on: March 16, 2011, 08:35:12 PM »
Sounds NICE. Loud, but nice! Is that an open meg?
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Offline Greggo

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Re: Heat cycles (video)
« Reply #2 on: March 16, 2011, 08:43:42 PM »
Sounds like a brute!
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Offline MRieck

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Re: Heat cycles (video)
« Reply #3 on: March 16, 2011, 08:44:24 PM »
That sounds strong Dave.
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Offline MRieck

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Re: Heat cycles (video)
« Reply #4 on: March 16, 2011, 08:45:49 PM »
Quote from: MRieck on March 16, 2011, 08:44:24 PM
That sounds strong Dave.
Real strong after listening to it again. ;)
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Offline mick7504

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Re: Heat cycles (video)
« Reply #5 on: March 16, 2011, 09:16:32 PM »
Sounds crisp and angry.
That's great.
Can't stop watching the video over and over again.  8)
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Offline Doctor_D

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Re: Heat cycles (video)
« Reply #6 on: March 16, 2011, 09:21:29 PM »
Quote from: scottly on March 16, 2011, 08:35:12 PM
Sounds NICE. Loud, but nice! Is that an open meg?

Not AN open meg. Four open megs.

Not a chance of running it like that on the street.  Need to come up with some sort of baffles.
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Take care,
David
___________________________________________
1975 CB 750F - Project page: http://forums.sohc4.net/index.php?topic=66026.msg725479#msg725479
1978 CX500
1971 Norton Commando

Offline seaweb11

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Re: Heat cycles (video)
« Reply #7 on: March 16, 2011, 09:23:39 PM »
Sounds just like my 836 with a Yoshi ;)   Nice 8)
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Offline Doctor_D

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Re: Heat cycles (video)
« Reply #8 on: March 16, 2011, 09:24:25 PM »
Quote from: MRieck on March 16, 2011, 08:45:49 PM
Quote from: MRieck on March 16, 2011, 08:44:24 PM
That sounds strong Dave.
Real strong after listening to it again. ;)

If it sounds good, it's because of you Mike.  Cam selection, great guidance on getting proper squish, loaning me your jets, and fantastic head work - you played a pretty big role in setting up this motor.
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Take care,
David
___________________________________________
1975 CB 750F - Project page: http://forums.sohc4.net/index.php?topic=66026.msg725479#msg725479
1978 CX500
1971 Norton Commando

Offline turboguzzi

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Re: Heat cycles (video)
« Reply #9 on: March 17, 2011, 04:01:48 AM »
Quote from: Doctor_D on March 16, 2011, 09:24:25 PM
Quote from: MRieck on March 16, 2011, 08:45:49 PM
Quote from: MRieck on March 16, 2011, 08:44:24 PM
That sounds strong Dave.
Real strong after listening to it again. ;)

If it sounds good, it's because of you Mike.  Cam selection, great guidance on getting proper squish, loaning me your jets, and fantastic head work - you played a pretty big role in setting up this motor.

hei D

pretty curious too as to what you'll get on the dyno now as i  just finished building and dynoing an 810 with 29mm CR's , similar cam timing, hi-comp, etc. 

its an air cooled four with two valves per cyl, just not an honda ;)

TG

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Offline Doctor_D

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Re: Heat cycles (video)
« Reply #10 on: March 17, 2011, 07:07:24 AM »
I've got my finger's crossed for mid to high 80's on our pretty conservative dyno. 100 rwhp/liter is a respectable number in most people's books.
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Take care,
David
___________________________________________
1975 CB 750F - Project page: http://forums.sohc4.net/index.php?topic=66026.msg725479#msg725479
1978 CX500
1971 Norton Commando

Offline MRieck

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Re: Heat cycles (video)
« Reply #11 on: March 17, 2011, 08:58:35 AM »
Quote from: Doctor_D on March 16, 2011, 09:24:25 PM
Quote from: MRieck on March 16, 2011, 08:45:49 PM
Quote from: MRieck on March 16, 2011, 08:44:24 PM
That sounds strong Dave.
Real strong after listening to it again. ;)

If it sounds good, it's because of you Mike.  Cam selection, great guidance on getting proper squish, loaning me your jets, and fantastic head work - you played a pretty big role in setting up this motor.
Thanks Dave...it was my pleasure for sure! ;)
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Offline turboguzzi

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Re: Heat cycles (video)
« Reply #12 on: March 18, 2011, 04:48:03 AM »
just in case you want to have a baseline...

http://www.satanicmechanic.org/dyno.shtml
« Last Edit: March 18, 2011, 04:51:01 AM by turboguzzi »
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Offline wick

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Re: Heat cycles (video)
« Reply #13 on: March 18, 2011, 03:33:57 PM »
 ;D ;D ;D ;D ;D ;D

[youtube=425,350]http://www.youtube.com/watch?v=TD5Ag5ioFF8[/youtube]
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Offline brandEn

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Re: Heat cycles (video)
« Reply #14 on: March 18, 2011, 03:58:36 PM »
What do they charge for dyno runs at Twinline? I am wanting to tune my bike once she is up and running.
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Offline Doctor_D

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Re: Heat cycles (video)
« Reply #15 on: March 18, 2011, 10:05:23 PM »
They charge shop-time, $100 per hour.  Bring your jets, etc. and make the time count and the price doesn't seem too bad.  Come unprepared and it can seem like a serious waste of time and money.
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Take care,
David
___________________________________________
1975 CB 750F - Project page: http://forums.sohc4.net/index.php?topic=66026.msg725479#msg725479
1978 CX500
1971 Norton Commando
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