Desktop dyno

Five0 · 07-05-2001, 07:09 AM

Me and some friends got all the info needed to plug into desktop dyno and it said 514 hp @6500 rpms and 479 ft lb (i think, can't remember the torque for sure.

Does this sound right for a 347 with ported canfields.
Sounds a little high to me but I really don't know what to expect.

How much drive train loss will there be with 3.55 gears and a c-4 trans. The stall is 3400.

------------------
James Cox
nochevy@hotmail.com
1991 Mustang LX
12.565 @109.38mph 1.764 60ft

bigwhitecobra · 07-05-2001, 11:28 AM

Yeah, that system is very optimistic. I plugged in all my info on the Cobra and it said that I should be at 350hp and 365 trq. And I don't really have all that much done to it. It's fun to play with, but I think that's about all it's good for. Sorry.

Later.

------------------
The Black Mamba 11.2@124
1994 Cobra
'00 Focus ZTS- K&N drop in. 10.66@66mph 1/8mile

Rev · 07-05-2001, 03:19 PM

I've been playing around with it for awhile now. Always optimistic in my opinion. Get a chassis dyno (DynoJet) and see what it does. 75% is what I would expect for a C-4 driveline efficiency. That means divide the DynoJet figures by .75 to get estimated flywheel numbers.

Rev.

------------------
'66 Coupe, 306, 300 HP, C-4, 13.97 e.t., 100.3 mph
1/4 mi.

Five0 · 07-05-2001, 03:28 PM

Hey bigwhitecobra, I see your alarm system is almost as big as mine!

------------------
James Cox
nochevy@hotmail.com
1991 Mustang LX
12.565 @109.38mph 1.764 60ft

Five0 · 07-05-2001, 03:32 PM

Hey rev do you think I will really get a 25% loss through the drive train w/ a c-4?

What would it be with a t-5?

Rev · 07-05-2001, 06:31 PM

Ford says 83% effiiency or a 17% loss through the drivetrain for a 5 speed. At least that's what I've been told for a 5-speed driveline. I think that's about right though.

Rev

------------------
'66 Coupe, 306, 300 HP, C-4, 13.97 e.t., 100.3 mph
1/4 mi.

07-05-2001, 07:09 AM	#1
Five0 Registered Member Join Date: Apr 2000 Location: middleburg, fl, usa Posts: 1,134	Desktop dyno Me and some friends got all the info needed to plug into desktop dyno and it said 514 hp @6500 rpms and 479 ft lb (i think, can't remember the torque for sure. Does this sound right for a 347 with ported canfields. Sounds a little high to me but I really don't know what to expect. How much drive train loss will there be with 3.55 gears and a c-4 trans. The stall is 3400. ------------------ James Cox nochevy@hotmail.com 1991 Mustang LX 12.565 @109.38mph 1.764 60ft

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07-05-2001, 11:28 AM	#2
bigwhitecobra Huh? Whatcha said? Join Date: Oct 2000 Location: Fayetteville, NC Posts: 1,073	Yeah, that system is very optimistic. I plugged in all my info on the Cobra and it said that I should be at 350hp and 365 trq. And I don't really have all that much done to it. It's fun to play with, but I think that's about all it's good for. Sorry. Later. ------------------ The Black Mamba 11.2@124 1994 Cobra '00 Focus ZTS- K&N drop in. 10.66@66mph 1/8mile

07-05-2001, 03:19 PM	#3
Rev Registered Member Join Date: Nov 1998 Location: Houston, Tx. Posts: 3,887	I've been playing around with it for awhile now. Always optimistic in my opinion. Get a chassis dyno (DynoJet) and see what it does. 75% is what I would expect for a C-4 driveline efficiency. That means divide the DynoJet figures by .75 to get estimated flywheel numbers. Rev. ------------------ '66 Coupe, 306, 300 HP, C-4, 13.97 e.t., 100.3 mph 1/4 mi.

07-05-2001, 03:28 PM	#4
Five0 Registered Member Join Date: Apr 2000 Location: middleburg, fl, usa Posts: 1,134	Hey bigwhitecobra, I see your alarm system is almost as big as mine! ------------------ James Cox nochevy@hotmail.com 1991 Mustang LX 12.565 @109.38mph 1.764 60ft

07-05-2001, 03:32 PM	#5
Five0 Registered Member Join Date: Apr 2000 Location: middleburg, fl, usa Posts: 1,134	Hey rev do you think I will really get a 25% loss through the drive train w/ a c-4? What would it be with a t-5?

07-05-2001, 06:31 PM	#6
Rev Registered Member Join Date: Nov 1998 Location: Houston, Tx. Posts: 3,887	Ford says 83% effiiency or a 17% loss through the drivetrain for a 5 speed. At least that's what I've been told for a 5-speed driveline. I think that's about right though. Rev ------------------ '66 Coupe, 306, 300 HP, C-4, 13.97 e.t., 100.3 mph 1/4 mi.