Horsepower factors

4543 · 11-26-2024, 05:28 PM

I?m curious and lazy. Who has the highest factored horsepower over the factory rating. I?m would bet that some of the newer cars that have been hit hive the largest difference but some of out great minds on here can probably recite the numbers from memory. I don?t think I?m anywhere close but my 1989 Corvette 350/240 is NHRA rated at 270HP.
Mike McMahan 2543 G/SA

Nick Heath · 11-26-2024, 05:45 PM

Ignoring the FS/FSS cars...maybe one of the 1970's smog engines? The 1978 Volare 360/155 is rated at 289, for one example.

Jim Caughlin · 11-26-2024, 05:45 PM

Some of the smog motors got drastically refactored Ford 460 factory 220 NHRA rated 300 and there are other like this. I think there was a smogger 454 that had a huge increase also.

Rory McNeil · 11-27-2024, 12:54 AM

Quote:

Originally Posted by Jim Caughlin

Some of the smog motors got drastically refactored Ford 460 factory 220 NHRA rated 300 and there are other like this. I think there was a smogger 454 that had a huge increase also.

Jim, one of the versions of the Ford 460 was factory rated at 198 HP, but NHRA quickly put it at 300 HP, when I believe, Glen Tinsley showed up at the Winternationals years ago, with a 85/86 Mustang with a 460 198HP, classed as GT/MA!

Glenn Briglio · 11-27-2024, 07:53 AM

Quote:

Originally Posted by 4543

I?m curious and lazy. Who has the highest factored horsepower over the factory rating. I?m would bet that some of the newer cars that have been hit hive the largest difference but some of out great minds on here can probably recite the numbers from memory. I don?t think I?m anywhere close but my 1989 Corvette 350/240 is NHRA rated at 270HP.
Mike McMahan 2543 G/SA

Nhra factored your combo before anyone even raced it.

Billy Nees · 11-27-2024, 08:46 AM

Quote:

Originally Posted by Glenn Briglio

Nhra factored your combo before anyone even raced it.

NHRA factored a lot of combos before anyone even raced them! Some of those combos that have been factored have never been raced to this day!
Just another thing NHRA will never get around to looking at.

JP1738 · 11-27-2024, 09:53 AM

I know that TStick and I's combo has been dinged many times. 1980 Chevy 305 currently sits at 232 from 180. I feel like that's pretty heroic!

Bobby Lundholm · 11-27-2024, 11:15 AM

1983 305/150 Camaro now rated at 248 hp.

Jim Whitehead · 11-27-2024, 01:10 PM

1986 Firebird 305 Small cam 150/266 116 H.P.
Big cam 160/275 115 HP

Mike Gray · 11-28-2024, 01:08 AM

1973 Ford Torino wagon 429 197hp / 350hp. +153hp

11-26-2024, 05:28 PM	#1
4543 Senior Member Join Date: Apr 2005 Location: Texas Posts: 638 Likes: 58 Liked 634 Times in 139 Posts	Horsepower factors I?m curious and lazy. Who has the highest factored horsepower over the factory rating. I?m would bet that some of the newer cars that have been hit hive the largest difference but some of out great minds on here can probably recite the numbers from memory. I don?t think I?m anywhere close but my 1989 Corvette 350/240 is NHRA rated at 270HP. Mike McMahan 2543 G/SA Last edited by 4543; 11-26-2024 at 05:30 PM. Reason: Wrong number

11-26-2024, 05:45 PM	#2
Nick Heath Member Join Date: Sep 2010 Location: Jersey Shore Posts: 359 Likes: 1,443 Liked 565 Times in 135 Posts	Re: Horsepower factors Ignoring the FS/FSS cars...maybe one of the 1970's smog engines? The 1978 Volare 360/155 is rated at 289, for one example.

11-26-2024, 05:45 PM	#3
Jim Caughlin Senior Member Join Date: Mar 2002 Location: Woodburn, Or Posts: 685 Likes: 82 Liked 804 Times in 245 Posts	Re: Horsepower factors Some of the smog motors got drastically refactored Ford 460 factory 220 NHRA rated 300 and there are other like this. I think there was a smogger 454 that had a huge increase also.

11-27-2024, 09:53 AM	#7
JP1738 Senior Member Join Date: Jan 2024 Location: Charlotte, NC Posts: 566 Likes: 1,606 Liked 1,171 Times in 333 Posts	Re: Horsepower factors I know that TStick and I's combo has been dinged many times. 1980 Chevy 305 currently sits at 232 from 180. I feel like that's pretty heroic! __________________ Dawson Pauley #2827 N/SA 1980 Malibu SW 2S 305/180 #2827 S/ST 1978 Mazda RX7 w/ 383 sbc/glide

11-27-2024, 11:15 AM	#8
Bobby Lundholm Member Join Date: Dec 2006 Location: Charlevoix, MI Posts: 451 Likes: 110 Liked 122 Times in 48 Posts	Re: Horsepower factors 1983 305/150 Camaro now rated at 248 hp. __________________ Bobby Lundholm 3516 G/SA

11-27-2024, 01:10 PM	#9
Jim Whitehead Member Join Date: Mar 2003 Location: MA. Posts: 287 Likes: 153 Liked 150 Times in 41 Posts	Re: Horsepower factors 1986 Firebird 305 Small cam 150/266 116 H.P. Big cam 160/275 115 HP

11-28-2024, 01:08 AM	#10
Mike Gray Senior Member Join Date: Oct 2006 Posts: 615 Likes: 310 Liked 685 Times in 196 Posts	Re: Horsepower factors 1973 Ford Torino wagon 429 197hp / 350hp. +153hp __________________ Mike 7570 A/SA Last edited by Mike Gray; 11-28-2024 at 01:12 AM.