HP rating for this combo?

fredjohnston · 11-01-2017, 10:33 AM

Just curious if the HP rating for this combo has changed because of the performance at Vegas. And, if not why hasn't it?

1 757 GT/IA Larry Zavala, Montebello CA, '86 Camaro 9.616 10.83 -1.214

John Stock · 11-01-2017, 11:29 AM

No. I don't believe it has, or will.

The ET was 9.616 which corrects to a sea level run of 9.453. the sea level GT/IA index is 10.65 which makes the run corrected to sea level -1.197. Close but no exploding cigar for Larry.

I will say the reported adjusted altitude was 4100 for that round which makes that one bad hot rod.

fredjohnston · 11-01-2017, 11:33 AM

Runs of 1.200 or more under the index will be reviewed and adjusted Tuesday following the event. Runs at all NHRA National, Sports National, and LODRS events, including those at altitude factored race tracks, are included in the 1.200-second-or-more-under analysis

Herbie Null · 11-01-2017, 12:24 PM

It was changed 10/31/17 now at 279 in GT

fredjohnston · 11-01-2017, 08:53 PM

Quote:

Originally Posted by Herbie Null

It was changed 10/31/17 now at 279 in GT

He ran or claimed the 88/89 combo in Vegas?

Ed Wright · 11-02-2017, 10:24 AM

Quote:

Originally Posted by fredjohnston

He ran or claimed the 88/89 combo in Vegas?

'86 thru '92 F body, and '85 thru '91 Corvette is all the same L98 engine. Why would year model matter. Factory hp rating is different? Some had different camshafts, which are not used in SS or SS/GT. Should be automatic hp the following Monday, right?

Dwight Southerland · 11-02-2017, 10:48 AM

Ed -
Part of the explanation is that the hp increase is for SS/GT RWD, aftermarket heads, auto transmission combinations only. Not all the '86-'92 L98 engines meet those conditions. Some do and were not touched, and some have that 279 rating for FWD already, but at 275 for RWD. I do not always understand the reasoning in the distribution of different power ratings for the same engine, so here is another example.

Erik Jones · 11-02-2017, 12:00 PM

Its a dish piston with replacement heads. Only 2 years with this spec, makes perfect sense that only this combo in a RWD gets hit. Thats why we did it. The standard "L98" that we ran last year and most guys run is a flat top engine.

Ed Wright · 11-02-2017, 04:06 PM

Wow I have never had the heads off one of those with dished pistons. Guess I need to get out more.

Fred D Bartoli · 11-02-2017, 08:25 PM

Wouldn't the new h.p. rating apply to any RWD/GT car. ? .If I were to put that combination in my 2000 Firebird would it be 270 or 279?

11-01-2017, 10:33 AM	#1
fredjohnston Member Join Date: Jul 2007 Posts: 341 Likes: 0 Liked 55 Times in 14 Posts	HP rating for this combo? Just curious if the HP rating for this combo has changed because of the performance at Vegas. And, if not why hasn't it? 1 757 GT/IA Larry Zavala, Montebello CA, '86 Camaro 9.616 10.83 -1.214

11-01-2017, 11:29 AM	#2
John Stock Junior Member Join Date: Dec 2001 Posts: 32 Likes: 0 Liked 45 Times in 2 Posts	Re: HP rating for this combo? No. I don't believe it has, or will. The ET was 9.616 which corrects to a sea level run of 9.453. the sea level GT/IA index is 10.65 which makes the run corrected to sea level -1.197. Close but no exploding cigar for Larry. I will say the reported adjusted altitude was 4100 for that round which makes that one bad hot rod.

11-01-2017, 11:33 AM	#3
fredjohnston Member Join Date: Jul 2007 Posts: 341 Likes: 0 Liked 55 Times in 14 Posts	Re: HP rating for this combo? Runs of 1.200 or more under the index will be reviewed and adjusted Tuesday following the event. Runs at all NHRA National, Sports National, and LODRS events, including those at altitude factored race tracks, are included in the 1.200-second-or-more-under analysis

11-01-2017, 12:24 PM	#4
Herbie Null Member Join Date: Aug 2008 Location: greencastle pa Posts: 198 Likes: 52 Liked 286 Times in 55 Posts	Re: HP rating for this combo? It was changed 10/31/17 now at 279 in GT __________________ Herbie Null 201 SS

11-02-2017, 10:48 AM	#7
Dwight Southerland VIP Member Join Date: Dec 2001 Location: Arkansas - In the middle of everything. Posts: 1,981 Likes: 53 Liked 724 Times in 177 Posts	Re: HP rating for this combo? Ed - Part of the explanation is that the hp increase is for SS/GT RWD, aftermarket heads, auto transmission combinations only. Not all the '86-'92 L98 engines meet those conditions. Some do and were not touched, and some have that 279 rating for FWD already, but at 275 for RWD. I do not always understand the reasoning in the distribution of different power ratings for the same engine, so here is another example. __________________

11-02-2017, 12:00 PM	#8
Erik Jones Junior Member Join Date: Nov 2010 Posts: 61 Likes: 1 Liked 48 Times in 6 Posts	Re: HP rating for this combo? Its a dish piston with replacement heads. Only 2 years with this spec, makes perfect sense that only this combo in a RWD gets hit. Thats why we did it. The standard "L98" that we ran last year and most guys run is a flat top engine. __________________ Erik Jones

11-02-2017, 04:06 PM	#9
Ed Wright Veteran Member Join Date: Mar 2005 Location: Sand Springs, OK Posts: 8,132 Likes: 896 Liked 389 Times in 168 Posts	Re: HP rating for this combo? Wow I have never had the heads off one of those with dished pistons. Guess I need to get out more. __________________ Ed Wright 4156 SS/JA

11-02-2017, 08:25 PM	#10
Fred D Bartoli Junior Member Join Date: Dec 2008 Posts: 73 Likes: 0 Liked 1 Time in 1 Post	Re: HP rating for this combo? Wouldn't the new h.p. rating apply to any RWD/GT car. ? .If I were to put that combination in my 2000 Firebird would it be 270 or 279?