My day at the Dyno.
08-15-2002, 09:45 AM
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My day at the Dyno.
With only 17k miles, newly installed DC 4-1 Header, Carsound CAT, (SMSP style) Toda camgears, and V-AFC. my base Dyno-pull: 175HP.
After intake advance (8 degrees) 30-40hp loss across entire powerband.
Wasn’t too happy about this so I had them return Cam to <0>.
Next Dyno run was the same: 30-40hp loss.
By this time I'm smelling clutch.
The tech said that my clutch was gone, and that the additional load of Dyno was not rendering correct numbers. So I leave with gears returned to their previous setting.
Everything feels great, buttdyno - like.
My question is, why would my clutch give out on the dyno?
If the Dyno asserts more load, how much more?
I tried the clutch-life ghetto test: 10MPH roll, 5k RPM step off clutch in 3rd. (engine dies) sounds like ample grip to me...
After intake advance (8 degrees) 30-40hp loss across entire powerband.
Wasn’t too happy about this so I had them return Cam to <0>.
Next Dyno run was the same: 30-40hp loss.
By this time I'm smelling clutch.
The tech said that my clutch was gone, and that the additional load of Dyno was not rendering correct numbers. So I leave with gears returned to their previous setting.
Everything feels great, buttdyno - like.
My question is, why would my clutch give out on the dyno?
If the Dyno asserts more load, how much more?
I tried the clutch-life ghetto test: 10MPH roll, 5k RPM step off clutch in 3rd. (engine dies) sounds like ample grip to me...
08-15-2002, 11:31 AM
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Re: My day at the Dyno. (oryanh)
thats not good.......
but atleast your motor didnt blow at the dyno like mine did
and i cant do anything about it........
but atleast your motor didnt blow at the dyno like mine did
and i cant do anything about it........
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08-15-2002, 11:41 AM
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Re: My day at the Dyno. (lsstfighterturbo)
Funny thing... It ran great.
Factory cam angle is not perfect. In theory I may have been retarded a bit already.
Any safe setting you guys recommend? -2 EX and +2 EX ?
Factory cam angle is not perfect. In theory I may have been retarded a bit already.
Any safe setting you guys recommend? -2 EX and +2 EX ?
08-16-2002, 08:07 AM
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Re: My day at the Dyno. (hungsteR)
08-16-2002, 08:25 AM
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Re: My day at the Dyno. (oryanh)
Take it to the dealership...they will replace it under warranty.
Mine died after a spring broke on the pressure plate at 23K miles and they still replaced it. However, I know everyone there and they know I dont race it, which seems to be a problem with the dealerships.
Good Luck!
Tom
Mine died after a spring broke on the pressure plate at 23K miles and they still replaced it. However, I know everyone there and they know I dont race it, which seems to be a problem with the dealerships.
Good Luck!
Tom
08-16-2002, 08:53 AM
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Re: My day at the Dyno. (oryanh)
But it's grippy.
Also...mine broke under normal driving conditions (rush hour traffice)...no hard shift or anything...I just couldnt shift all the sudden...
08-16-2002, 09:10 AM
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Re: My day at the Dyno. (oryanh)
Did that answer your question??
Explain more on how your clutch feels...when i was in gear and actually pushed on the gas...it would not pull as hard like the clutch was half engaged and half disengaged. Really weird feeling...
This is when I had the clutch in...
[Modified by Haunt, 1:21 PM 8/16/2002]
Explain more on how your clutch feels...when i was in gear and actually pushed on the gas...it would not pull as hard like the clutch was half engaged and half disengaged. Really weird feeling...
This is when I had the clutch in...
[Modified by Haunt, 1:21 PM 8/16/2002]
08-16-2002, 09:17 AM
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Re: My day at the Dyno. (Haunt)
It feels like the day I bought it.
That's why I was concerned about it craping out on the dyno.
Carboy made it seem like I sustained such an increase in power that my clutch wouldn't hold with the additional 15-20 hp.
...sure
That's why I was concerned about it craping out on the dyno.
Carboy made it seem like I sustained such an increase in power that my clutch wouldn't hold with the additional 15-20 hp.
...sure
08-16-2002, 09:27 AM
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Re: My day at the Dyno. (Haunt)
Not at all...
Feels quite strong. like +15hp @ 5kRPM on up.
...on the Butt Dyno.
It was almost as if the didn't fully release the brake on the dyno-drum.
(not appropriately named I'm sure)
My current concern is, what should I return my cam settings to? (at<0> now)
Feels quite strong. like +15hp @ 5kRPM on up.
...on the Butt Dyno.
It was almost as if the didn't fully release the brake on the dyno-drum.
(not appropriately named I'm sure)
My current concern is, what should I return my cam settings to? (at<0> now)
08-16-2002, 09:36 AM
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Re: My day at the Dyno. (oryanh)
My current concern is, what should I return my cam settings to? (at<0> now)
The clutch mystery sound very fishy.If the clutch can accelerate the car without any hesitation I really doubt that it could not turn the drum of a "good" dyno. At worst you should get lower then usual HP reading.
08-16-2002, 10:55 AM
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Re: My day at the Dyno. (oryanh)
It was almost as if the didn't fully release the brake on the dyno-drum.
(not appropriately named I'm sure)
(not appropriately named I'm sure)
Maybe him pushing on the brake pedal would be a different story?? That would be a stupid idiot...
08-16-2002, 10:59 AM
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Re: My day at the Dyno. (Haunt)
It was almost as if the didn't fully release the brake on the dyno-drum.
(not appropriately named I'm sure)
That can't be right considering your car is FWD and the emergency brake only locks the back wheels up (I'm 99% sure I'm right on that)
Maybe him pushing on the brake pedal would be a different story?? That would be a stupid idiot...
(not appropriately named I'm sure)
That can't be right considering your car is FWD and the emergency brake only locks the back wheels up (I'm 99% sure I'm right on that)
Maybe him pushing on the brake pedal would be a different story?? That would be a stupid idiot...
Jason
08-16-2002, 11:07 AM
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Re: My day at the Dyno. (FSTASNTZ)
I think he is talking about the actual brake that slows the drum on a dynojet...
Jason
Jason
Thanks!
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