A "427" c7?
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Le Mans Master
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From: Lake Wylie SC
A "427" c7?
Considering that a safe and reliable 427 could already be made from existing parts that would not inherit the problems associated with the LS 7, what reason would GM have not to make one available for the C7? (Or for that matter for a base motor)
It is a magic number for increasing sales and would support a host of a high-performance options such as a dry sump oiling system that too could come from already existing parts.
Here is a link showing how Lingenfelter makes a basically mild-mannered 570 HP 427 from a combination of a LS 7 block with an LS 3 top end.
http://www.lingenfelter.com/engine-p...cid-ls3-570-hp
It is a magic number for increasing sales and would support a host of a high-performance options such as a dry sump oiling system that too could come from already existing parts.
Here is a link showing how Lingenfelter makes a basically mild-mannered 570 HP 427 from a combination of a LS 7 block with an LS 3 top end.
http://www.lingenfelter.com/engine-p...cid-ls3-570-hp
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St. Jude Donor '07-'09
It's been stated in allot of places that the 7.0L motor is having it's swan song now. It's been stated that the emissions requirements that are happening are one of the main reasons for this. I'm sure there are other ones that I'm missing too.
I think we've seen the last of the truly 'big' small blocks in the C6.
I think we've seen the last of the truly 'big' small blocks in the C6.
Thread Starter
Le Mans Master
Joined: Jan 2005
Posts: 8,226
Likes: 2
From: Lake Wylie SC
It's been stated in allot of places that the 7.0L motor is having it's swan song now. It's been stated that the emissions requirements that are happening are one of the main reasons for this. I'm sure there are other ones that I'm missing too.
I think we've seen the last of the truly 'big' small blocks in the C6.
I think we've seen the last of the truly 'big' small blocks in the C6.
This may well be true but displacement does not necessitate high emissions. There are always advancements in technology of direct injection and cam timing that not only increase power but decrease emissions.
For that matter a 30 mile per gallon (highway driving) low performance 427 with conventional oiling could still easily put out 500 hp that would still waltz through any current emissions test as well as any planned for the near future. For sure SRT also had to consider emissions when keeping their big 10 cylinder motor.
Then there could be a high-performance 427 that could be used in a “GS option” that like the Lingenfelter motor could make an easy 570 hp being more track friendly with a dry sump system but comparable gas mileage. Come to think of it that was how the original 427's came out with both high performance and “normal performance” versions.
This would still leave room for an ultra performance motor for a “Z model” with forced induction and more “modern design features”.
Last edited by Shurshot; Sep 22, 2012 at 09:44 AM.
Team Owner
Joined: Feb 2001
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From: Short Hills, NJ
It's been stated in allot of places that the 7.0L motor is having it's swan song now. It's been stated that the emissions requirements that are happening are one of the main reasons for this. I'm sure there are other ones that I'm missing too.
I think we've seen the last of the truly 'big' small blocks in the C6.
I think we've seen the last of the truly 'big' small blocks in the C6.
Le Mans Master
Joined: Oct 2004
Posts: 6,813
Likes: 287
From: Toronto Ontario Canada
It's been stated in allot of places that the 7.0L motor is having it's swan song now. It's been stated that the emissions requirements that are happening are one of the main reasons for this. I'm sure there are other ones that I'm missing too.
I think we've seen the last of the truly 'big' small blocks in the C6.
I think we've seen the last of the truly 'big' small blocks in the C6.
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Thread Starter
Le Mans Master
Joined: Jan 2005
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From: Lake Wylie SC
What appears to me as a no-brainer is how easy a new reliable 500 HP 427 could be produced from existing parts that would make far more horsepower than the current stock LS 3 motor makes without giving up emissions or sacrificing mileage.
This would leave room for a dry sump high performance version producing another 75 hp or so assembled by hand alongside the LS 9 motors in the same way that the LS 7 motors are made today.
After resurrecting the number “427” and seeing its benefits I doubt if GM would be so stupid to bury it again. If nothing else the bean counters would be able to see the wisdom in keeping it.
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Just like marketing for the C6Z using the statement "The ZO6's Unique wide body styling" Look how long that was unique.
Team Owner
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St. Jude Donor '26
I believe its more fuel economy driven as opposed to emissions, but we will never see a 427 again. Tadge stated as much in an interview about a year and a half, or 2 years ago. There's probably a link on here with it somewhere
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From: Toronto Ontario Canada
Le Mans Master
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From: Los Angeles California
It would make sense why they decided to put it in the GS as well. They may have decided they weren't going to do 427s anymore and figured they had so many LS7s left that they might as well throw them in other cars while they still can. LOL