IF WE HAVE A GEN 6 ZL1 WHAT HP WILL IT BE?

[Bigtime53]

Originally Posted by Joseph1LE

So why did "310hp" LS1 engines dyno 290-315+hp at the wheels?

Where did you see this information? Link please.

[Whos_Drivin]

Originally Posted by Joseph1LE

So why did "310hp" LS1 engines dyno 290-315+hp at the wheels?

Were they SAE Certified? GM started adopting SAE HP Certification in 2006...so that's a no.

[hognutz]

Originally Posted by CAM....ZL1

I had a link and it was from Fords site saying they were going to make only 300
initially of the GT500 with at least 750 HP

hmm I have been all over the ford forums trying to buy a GT350 and I have not seen anything.

be awesome if they do though.

[hognutz]

Originally Posted by Joseph1LE

So why did "310hp" LS1 engines dyno 290-315+hp at the wheels?

I think the LS7 was the first SAE rated powerplant GM produced and they are very consistant in output.


most dyno ~440whp which is 12-13% loss.

[Whos_Drivin]

Originally Posted by hognutz

I think the LS7 was the first SAE rated powerplant GM produced and they are very consistant in output.


most dyno ~440whp which is 12-13% loss.

Bingo!
http://www.sae.org/certifiedpower/details.htm

[motorhead]

Originally Posted by Whos_Drivin

I don't understand the "underrated" hp comments regarding the hellcat. That is the purpose of the SAE Certified ratings...so manufacturers can't under or over rate their engines. If they are indeed underrated then that throws out the validity of the SAE ratings.

http://www.motortrend.com/features/e...8_technologue/

This is a good article that explains the current system. No way to be off by more than 2% if an engine is SAE Certified. There is a net and a gross rating though.

I appreciate that GM took the lead in wanting to prove accuracy in their numbers.

[Joseph1LE]

Originally Posted by Bigtime53

Where did you see this information? Link please.

This is common knowledge for anyone actively involved in the LS engine world. Feel free to google it yourself as there are literally hundreds of threads, articles, youtube videos, ect.

Originally Posted by Whos_Drivin

Were they SAE Certified? GM started adopting SAE HP Certification in 2006...so that's a no.

However I did not know this... Thank you for that info.

[2013 ZL1 #7860]

Originally Posted by Joseph1LE

So why did "310hp" LS1 engines dyno 290-315+hp at the wheels?

Not SAE engines and every dyno is different. They are just tools.

The difference between 290 and 315 is negligible anyway.

[Bigtime53]

[QUOTE=Joseph1LE;8524480]This is common knowledge for anyone actively involved in the LS engine world. Feel free to google it yourself as there are literally hundreds of threads, articles, youtube videos, ect.

Excuse me for asking. Prove it to me since you are so active in the LS engine world.

[USAFS197]

I don't think the burden of proof is on him considering the plethora of data that's out there. As he stated earlier, the previous iterations of LS engines were under rated. However, if the adoption of SAE standards from 2006+ is indeed true, then it would stand to reason that the old LS1/2/6 engines would fall in line before this adoption. From here on out, the concept of under rated engines is likely misunderstood these days. More likely, transmissions and their application to the wheels has become more efficient; leading enthusiasts to believe that the engine is under rated when they're still abiding by the old 15% rule.

If you doubt his ascertations, it would behoove you to research the topic yourself as a pose to interjecting a seemingly pretentious snub. Venture on over to LS1tech or any other reputable forum and start scouring around. You'll find the information you're looking for.

[Bigtime53]

Well I do not go to any boards or any web sites other than this one. I only have so much time per day to catch up on this site and I like to read what is going on with these cars that we all have. I am I guess like others or at least some about the 15 percent deduct on the engine hp and that will give you whp. But I guess that does not apply by reading the other threads here. I am here to get educated on anything that has to do with the ZL1 and the Z/28 since I have both. If someone puts up a thread and makes a statement that I find interesting and maybe doubt I would like to know where they got that info from,that's all. I did not intend for the question I asked to be taken the wrong way as I only wanted him to show me this so I would not have to search and maybe not find it. It was just a question so I could read about it.

[Joseph1LE]

Originally Posted by Bigtime53

Well I do not go to any boards or any web sites other than this one. I only have so much time per day to catch up on this site and I like to read what is going on with these cars that we all have. I am I guess like others or at least some about the 15 percent deduct on the engine hp and that will give you whp. But I guess that does not apply by reading the other threads here. I am here to get educated on anything that has to do with the ZL1 and the Z/28 since I have both. If someone puts up a thread and makes a statement that I find interesting and maybe doubt I would like to know where they got that info from,that's all. I did not intend for the question I asked to be taken the wrong way as I only wanted him to show me this so I would not have to search and maybe not find it. It was just a question so I could read about it.

It was supposedly done for the purpose of not impeding on Corvette sales, but the LS1 f-body made the same horsepower at the flywheel as the LS1 Corvettes at the time. They didn't want the f-body to seem like more of a performance bargain than it already was and have everyone buying that and kill Corvette sales. This is not confirmed by GM, but they never gave us an actual reason so that is the most reasonable explanation the public has come up with. As you said, I also only have so much time per day to be on here. If you are really intrigued you can research it yourself. But I'll give you some info anyways. I have had the pleasure of owning two LS1 f-bodies and had both on the dyno when they were near stock. My '99 Formula put down 314whp/311wtq with only a lid and cat-back exhaust. That was an auto trans car. My 2001 SS put down 312whp through a 6 speed with nothing but a lid. The lid is good for 5-7whp. Cat-back exhaust good for 7-10whp. There are literally hundreds of other dyno tests proving that the engines were underrated and did in fact make the same horsepower as the Corvette. Ford even got a Camaro SS to test and dynoed it at I believe 326rwhp BONE STOCK. They threw a pair of drag radials on it and ran an impressive 1/4 mile but I forgot what the ET/mph was. And it was this test that prompted Ford to create the Mustang Cobra in 2003, as they were tired of getting their asses handed to them for 10 years since the LT1 came out in the f-body in '93 and knew they really had to step it up when seeing that the LS1 f-bodies were capable than a lot more than GM wanted to admit. I have searched for the article but can't find it, as it is very old. But I did find a snippet of another article that you can see below comparing the f-body to the Corvette, as well as a link to an article where they tested an SLP optioned Camaro. If you scroll down enough it shows the rwhp compared to the rated flywheel horsepower... You can see for yourself the numbers don't make sense. Thats just a small amount out of tons and tons of proof that can be presented.


http://www.superchevy.com/features/0...ro-ss-feature/

[Bigtime53]

Thank you. Now a dumb question.You said you put a lid on those cars,what is that?

[Joseph1LE]

Originally Posted by Bigtime53

Thank you. Now a dumb question.You said you put a lid on those cars,what is that?

It's an air filter lid that replaces the bulky and restrictive stock air box. Left picture is stock, right picture is an SLP lid in place of it. I believe SLP optioned cars back then came with the upgraded lid already but I could be wrong about that.