Hp Changes announced

Monte Howard · 12-20-2019, 12:04 PM

http://www.nhraracer.com/content/gen...700&zoneid=132

BG56 · 12-21-2019, 09:49 AM

Quote:

Originally Posted by Monte Howard

http://www.nhraracer.com/content/gen...700&zoneid=132

'70-'71 Challenger with 425 Hemi? Misprint I'm sure, or have I been sleeping?!

Billy Nees · 12-21-2019, 10:31 AM

Well Brian, since you brought it up, how did the 70-71 challenger Hemi get a HP reduction in the first place? It's slow avg. in AA is -.1125 but it's slow avg. in A is -.859. Am I missing something here?

Tim H · 12-21-2019, 12:56 PM

On quick perusal it seems many receive early Christmas gifts ...

Greenlight · 12-21-2019, 02:50 PM

Quote:

Originally Posted by Billy Nees

Well Brian, since you brought it up, how did the 70-71 challenger Hemi get a HP reduction in the first place? It's slow avg. in AA is -.1125 but it's slow avg. in A is -.859. Am I missing something here?

The "AA" combination was with the replacement aluminum head, and the "A" combination was with the OEM cast iron head. Only the replacement head received a HP reduction.

oldskool · 12-21-2019, 03:39 PM

Lots of Pontiac guys will like that 5hp reduction, on the '68 Bird 400. NHRA left it at 330 for a LONG time. Then, hit it with 8, a few years back.

Still quite a few of those '68 Birds running.

Not many running the SD455. Just too rare.

There are still a few '71 455HO cars out there. I think Don Turk has one, & will appreciate the 5hp reduction.

MEXJOE · 12-22-2019, 12:39 AM

Quote:

Originally Posted by Greenlight

The "AA" combination was with the replacement aluminum head, and the "A" combination was with the OEM cast iron head. Only the replacement head received a HP reduction.

Isn’t that nice....

Capri · 12-26-2019, 10:38 AM

Man. I wonder who ran my combination in SuperStock and just blasted the index at 1.50 under to keep the rating at 45hp over the stock rating................

12-20-2019, 12:04 PM	#1
Monte Howard Member Join Date: Nov 2002 Location: Potomac,IL Posts: 279 Likes: 1 Liked 71 Times in 23 Posts	Hp Changes announced http://www.nhraracer.com/content/gen...700&zoneid=132 __________________ Monte Howard 3209 STK, 3208 SS

12-21-2019, 10:31 AM	#3
Billy Nees VIP Member Join Date: Oct 2002 Location: On a hilltop in Pa. Posts: 4,496 Likes: 3,600 Liked 7,768 Times in 1,741 Posts	Re: Hp Changes announced Well Brian, since you brought it up, how did the 70-71 challenger Hemi get a HP reduction in the first place? It's slow avg. in AA is -.1125 but it's slow avg. in A is -.859. Am I missing something here? __________________ Billy Nees 1188 STK, SS I'm not spending 100K to win 2K

12-21-2019, 12:56 PM	#4
Tim H VIP Member Join Date: Jan 2007 Posts: 1,042 Likes: 1,075 Liked 482 Times in 159 Posts	Re: Hp Changes announced On quick perusal it seems many receive early Christmas gifts ...

12-21-2019, 03:39 PM	#6
oldskool VIP Member Join Date: Dec 2014 Location: The Land of Bayous, Boudin & Crawfish Posts: 1,668 Likes: 223 Liked 747 Times in 362 Posts	Re: Hp Changes announced Lots of Pontiac guys will like that 5hp reduction, on the '68 Bird 400. NHRA left it at 330 for a LONG time. Then, hit it with 8, a few years back. Still quite a few of those '68 Birds running. Not many running the SD455. Just too rare. There are still a few '71 455HO cars out there. I think Don Turk has one, & will appreciate the 5hp reduction.

12-26-2019, 10:38 AM	#8
Capri Member Join Date: Apr 2004 Posts: 171 Likes: 0 Liked 27 Times in 14 Posts	Re: Hp Changes announced Man. I wonder who ran my combination in SuperStock and just blasted the index at 1.50 under to keep the rating at 45hp over the stock rating................