1991 Factory HP

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Apr 12, 2009 | 08:56 PM

jdixter71

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Heel & Toe

Joined: Apr 2009

Posts: 20

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From: Simpsonville SC

1991 Factory HP

Hello all. I'm sure I could find this easily through a google search, but I trust all of you much more. How do I determine if my '91 has the 245 HP or the 250 HP engine? I have the 2.59 rear axle if that helps.

Thanks in advance....

Apr 12, 2009 | 08:59 PM

Aggravated4life

Race Director

Joined: Aug 2000

Posts: 14,130

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Cruise-In II Veteran

The mufflers...if both outlets flow,then its the 250.
If one outlet flows and the other is blocked off,its the 245.
(I think)

Apr 12, 2009 | 09:10 PM

DarkBlue88

Pro

Joined: Oct 2005

Posts: 721

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From: Charlotte NC, behind someone going 10 under the speed limit

With a 2.59 gear I doubt all 4 muffler outlets work...

Apr 12, 2009 | 09:38 PM

pologreen1

Team Owner

Joined: Dec 2007

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99% sure that with the 2.59 you got 245hp
the performance was 3.07 with better mufflers.= 250hp

Apr 12, 2009 | 09:42 PM

BADDUCK

Le Mans Master

Joined: Jun 2006

Posts: 5,642

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From: One day you're a Comet...the next day you're dust... Arkansas

Both outlets work on both mufflers = 250 CHP

Apr 13, 2009 | 08:33 AM

vetteman42

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Joined: Apr 2000

Posts: 696

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From: Jenkintown PA

Quote:

Originally Posted by pologreen1

99% sure that with the 2.59 you got 245hp
the performance was 3.07 with better mufflers.= 250hp

my'91 a/t coupe is 250hp w/3.07.

2.59 is 245hp.

SAVE THE WAVE

Apr 13, 2009 | 08:49 AM

mseven

Le Mans Master

Joined: Feb 2005

Posts: 5,146

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From: The Motor City

When my 90 was stock, it came w/g44 (3.07 perf. gear), and supposedly the exhaust/mufflers for the "xtra 5 hp." and mine did not have both tips functional. If it was making a couple extra ponies I would bet it came from the "new piston" (raised the compression to 10.25:1) design for 90-91.