Dyno #'s HP 500
02-16-2005 | 11:20 AM
#13
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Joined: Mar 2001
Posts: 628
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From: Walled Lake Michigan
Re: Dyno #'s HP 500
Doc,
Did you keep the stock throttle body or did you install a larger one like the one's that are on the 525's.? Also what about the reprogramming of the ECU.
I'm changing my heads and adding the A/S throttle body to my 500EFI's. I should say I'm adding the entrie 500 EFI upgrade kit from A/S. If I make 550 HP and pick-up some additional Torque from my bolt on I will be happy.
Did you keep the stock throttle body or did you install a larger one like the one's that are on the 525's.? Also what about the reprogramming of the ECU.
I'm changing my heads and adding the A/S throttle body to my 500EFI's. I should say I'm adding the entrie 500 EFI upgrade kit from A/S. If I make 550 HP and pick-up some additional Torque from my bolt on I will be happy.
02-16-2005 | 12:44 PM
#14
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Joined: Jul 2002
Posts: 293
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From: Connersville ,Indiana
Re: Dyno #'s HP 500
Originally Posted by Dock Holiday
If you just kept everything stock and simply freshened them up I say it sounds very good.
I just dynoed one of my 500 EFI's last week. We changed the heads to World Merlin II's, Rect Port 320 CC. Bumped the compression fro 8.75:1 up to 9.1:1 and kept everything else stock. Of course freshened up the entire motor.
These are the dyno numbers.
4300 RPM HP= 526.9 Torque = 643.6 Ft Lbs (Max Torque)
5200 RPM HP= 598.0 Torque = 604.0 Ft Lbs (Max HP)
The rev limiter kicked in and it was still making horsepower.
Hope this helps for a comparsion.
Doc
I just dynoed one of my 500 EFI's last week. We changed the heads to World Merlin II's, Rect Port 320 CC. Bumped the compression fro 8.75:1 up to 9.1:1 and kept everything else stock. Of course freshened up the entire motor.
These are the dyno numbers.
4300 RPM HP= 526.9 Torque = 643.6 Ft Lbs (Max Torque)
5200 RPM HP= 598.0 Torque = 604.0 Ft Lbs (Max HP)
The rev limiter kicked in and it was still making horsepower.
Hope this helps for a comparsion.
Doc
02-16-2005 | 03:07 PM
#15
Charter Member #34
Joined: Oct 2000
Posts: 7,151
Likes: 2
From: Beautiful North Carolina
Re: Dyno #'s HP 500
Originally Posted by IndianaHeat
Doc any ECU work? nice numbers Ran Dom 32
02-16-2005 | 06:02 PM
#18
Registered User
Joined: Feb 2001
Posts: 3,300
Likes: 1
From: Tampa, Indian Shores Beach
Re: Dyno #'s HP 500
I am curious, what does a 500efi pull on a Dyno brand new?? Is it just 500hp?? I think you gains are awsome but damn 100+ hp for just working the stock heads? You make me want to pull my 500efi and do it 
WILL
WILL
02-16-2005 | 06:10 PM
#20
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Joined: May 2001
Posts: 1,097
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From: Cape Coral, FL or Colonial Beach, VA
Re: Dyno #'s HP 500
I am putting 525EFI Cams, cometic .027 gaskets and Iron Eagle 308 heads on mine. 9.38CR, 120 Thermostat, Big flow numbers on the heads, See Nordic Section
