LS1 Horsepower Factors

[Billy Nees]

Originally Posted by my69396

You know there is something up with the horsepower when a engine combo that is 75 ci smaller rated at less horsepower in the same class can be 3 tenths and 4 mph faster. Just saying.

Ever seen the specs on a 455 Olds?

[e vassar]

The GTO,s are carrying some weight though.
3570 E/SA
3740 F/SA

[Jim Kaekel]

Originally Posted by Billy Nees

Ever seen the specs on a 455 Olds?

Your point? If it was such as easy combination to run way under...everybody and their brother would have one. Fact is, there are only a couple in the whole country that are active, myself included.

[Billy Nees]

Cool yer jets Jim. I've been an Olds guy since high school. My comment was meant in respect to an LS combo. Yeah, a 455 Olds is pretty good when compared to other combos of it's era but it's no LS.

[GUMP]

When was the last time that the 455 got HP?

Has anyone gone a second under in the last ten years with one?

[B Parker]

Originally Posted by 442OLDS

I recently bought a copy of Nitro Joe's Stats on Ebay.(Nice job by the way).
I really wasn't aware of some of the horsepower factors in some of the classes I don't compete in.
It appears that there is an LS1 in some bodies that is at 381.
Then there is a manual transmission combo that is something like 40 horsepower less than the 381 of the same body.
Then,if it is in a Corvette,you see 350.But in a Firebird, it's 381
Are these engines all the same or are there differences?

It must be the body Style. LOL That was one of the reasons for the AHFS. Before the AHFS the engine combo would get hit no matter what body style it was in. This year under the currant AHFS rules should be interesting. Should we now call the AHFS the all New Woke AHFS. This year I hope they are calling me .66 under. Barry

[Jim Kaekel]

Originally Posted by GUMP

When was the last time that the 455 got HP?

Has anyone gone a second under in the last ten years with one?

Nobody has gone a second under in the last ten years.

[Jack Matyas]

I can't believe this thread has gone on as long as it has but let me clear (??) things up - and remember this is coming from an LS1 Firebird and '04 GTO guy - first , the engines are the same - period.Second , there are sticks and auto's.Third , the bodies in the Corvettes are the same except for yearly changes and none have 'Ram Air'.Third , and lastly the Firebirds are the same with minor body changes and some have 'Ram Air' . The '04 GTO didn't have 'Ram Air' .

The biggest thing I see is some have chosen to keep their foot down all 1320 feet when the air was 'super' .And at times ungodly 'super'.Kinda like what happened to the LT1's a few years back .

As for the 455 Olds combinations I have had none but I do know they haven't been a real factor in Stock since the seventies and eighties .How do I know ? One of my best friends and business associates was John Troxell who had much success with them and had factory support .Also he more than likely invented the phrase 'grey area' .

[JIM MARSHALL]

I don’t know what 455 you guys are referring to but a quick look at the guide shows the last time one had an increase or decrease was 2008.
That being said the late George Thompson raced a 1972 Olds 442 in G/SA with a 455 and could easily go a second under if he wanted to. I don’t have the answer but I do know I run the combo that has the greatest chance for success.

[GUMP]

Originally Posted by Jim Kaekel

Nobody has gone a second under in the last ten years.

At the PRI show this year I had a conversation with Lonnie about HP. I suggested that those two questions need to be applied to the older combinations.

(It is quite obvious that a lot of combinations got beat up pretty badly a long time ago and need help to be competitive again.)