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Old 02-03-2007, 11:48 PM   #1
larry may
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Smile LS7 Engine

Have any of you Hotrodders ever sit behind an LS7 engine? That must be one of the most powerful engines around. Sen one for sale a bit ago under 7 grand . Fella said hes afraid to Rodeo that one. Thought that was a pretty good reason and a cheap chuckle. Hear they are used in Corvettes. Any one know about these Monster Engines. Even though they are called small blocks .......... Thanks Larry
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Last edited by larry may; 02-03-2007 at 11:49 PM.
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Old 02-04-2007, 12:05 AM   #2
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Re: LS7 Engine

It depends which LS7 your speaking of. The original was a big block 454 which GM also sold as a crate engine for around $3500.00 but has not been available for many years. The newest version is in the Z06 Corvettes and produces 505 horespower from 427 cubic inches of small block. I just purchased one in December and it is a beast! I have owned a few muscle cars in the 70's and had a racing engine business for 9 years from '80-'89 and it is right there with anything we built back in the day. The Mustangs don't even try! They are available from Chevy as a hand assembled engine, but even with my discount as a Dealer employee they are way more than $7000.00, so if you could snare one for that it is a steal!

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Old 02-04-2007, 08:53 AM   #3
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Smile Re: LS7 Engine

Quote:
Originally Posted by Skip Greaney View Post
It depends which LS7 your speaking of. The original was a big block 454 which GM also sold as a crate engine for around $3500.00 but has not been available for many years. The newest version is in the Z06 Corvettes and produces 505 horespower from 427 cubic inches of small block. I just purchased one in December and it is a beast! I have owned a few muscle cars in the 70's and had a racing engine business for 9 years from '80-'89 and it is right there with anything we built back in the day. The Mustangs don't even try! They are available from Chevy as a hand assembled engine, but even with my discount as a Dealer employee they are way more than $7000.00, so if you could snare one for that it is a steal!

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Below is where I seen the post about the LS7 . Been nice to have helped this fella out .

http://ozarkdragstrip.proboards39.co...ead=1141447979
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Old 02-04-2007, 09:40 AM   #4
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Re: LS7 Engine

Larry that LS7 is definately a big block 454 from the 70's. They are hosses. The newer LS7 is a small block and quite powerful too, rated at about 500 hp. I've not driven the latter one yet.
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Old 02-04-2007, 11:13 AM   #5
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Re: LS7 Engine

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Larry that LS7 is definately a big block 454 from the 70's. They are hosses. The newer LS7 is a small block and quite powerful too, rated at about 500 hp. I've not driven the latter one yet.

The latter is scary. I drove 3 or 4 and they are strong from the bottom of the RPM range all the way to the top. I work at a Chevy dealership and just happen to be the guy that gets the new cars when the truck drops them off. Dont get me wrong I dont go rag on some guys 80 grand toy I just go for a little scare myself ride. I have had some Mustangs and a few strong Chevy cars so I have some good cars to compare drives with and the LS7 wins hands down.
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Old 02-05-2007, 10:46 AM   #6
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Re: LS7 Engine

[QUOTE=Boog;2016113]Larry that LS7 is definately a big block 454 from the 70's. They are hosses. The newer LS7 is a small block and quite powerful too, rated at about 500 hp. I've not driven the latter one yet. [/QUOTE

We have one of the LS7 engines and we have owned it since the early 80's(we bought it new from GM for $3800).It has been in everything froma 76 F-250 mud truck to a 73 International Scout.It sitting in our shop on a shelf resting comforably,waiting for the next project.It has been idle 5 years now but im looking for a 84-87 Chevy short bed to transplant it in next.
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Old 02-04-2007, 12:25 AM   #7
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Re: LS7 Engine

First used in the 2006 Z06's. They are rocket ships.

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Old 02-04-2007, 11:16 AM   #8
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Re: LS7 Engine

Alrighty then I'm shocked and awed. Need to get corrupt a wish started up again . I wish I had an LS7 ready for the road.lol
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Old 02-04-2007, 11:46 AM   #9
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Re: LS7 Engine

Along these lines, I was at Foster Auto Parts (late model pick and pull with some way too high prices) and they had a complete Viper V10 and 6 speed box. It made me think about options for mine.

A friend of mine bought a Magnum SRT8 last year and with no mods, gets an average 24mpg. It has that advanced Multiple Displacement System and is incredible. Why doesn't Chevy build something like that?
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Old 02-04-2007, 12:01 PM   #10
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Re: LS7 Engine

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Originally Posted by jimmydean View Post
A friend of mine bought a Magnum SRT8 last year and with no mods, gets an average 24mpg. It has that advanced Multiple Displacement System and is incredible. Why doesn't Chevy build something like that?
They do. It's called Displacement on Demand. They've had it out for a couple of years now. It's on the LS7. That engine is so economical that it is exempt from the gas guzzler tax.
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Old 02-04-2007, 02:09 PM   #11
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Re: LS7 Engine

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Originally Posted by JameslovesJammie View Post
They do. It's called Displacement on Demand. They've had it out for a couple of years now. It's on the LS7. That engine is so economical that it is exempt from the gas guzzler tax.
Yeah those Displacement on Demand engines area pretty nice... got to drive a new Impala SS... 5.3 smallblock in front wheel drive car is pretty fun
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Old 02-04-2007, 02:34 PM   #12
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Re: LS7 Engine

I stumbled on a 1967 Camaro in El Paso back in 1976 that had an LS7 transplanted in. The car was for sale for $6500. I drove it for a very few precious minutes.... undoubtedly the fastest car I have ever driven to this day. I was scared to floor it, part throttle was good enough for me. He had 4.11's in the back and an M22 four speed. Unbelievable!
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Old 02-04-2007, 02:47 PM   #13
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Re: LS7 Engine

I have the LS7 454 GM Crate engine, works well.
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Old 02-04-2007, 11:07 PM   #14
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Re: LS7 Engine

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Originally Posted by JameslovesJammie View Post
They do. It's called Displacement on Demand. They've had it out for a couple of years now. It's on the LS7. That engine is so economical that it is exempt from the gas guzzler tax.
I can't find a price on one. Do they make one that is flex fuel as well?
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Old 10-13-2007, 02:14 AM   #15
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Re: LS7 Engine

Quote:
Originally Posted by jimmydean View Post
Along these lines, I was at Foster Auto Parts (late model pick and pull with some way too high prices) and they had a complete Viper V10 and 6 speed box. It made me think about options for mine.

A friend of mine bought a Magnum SRT8 last year and with no mods, gets an average 24mpg. It has that advanced Multiple Displacement System and is incredible. Why doesn't Chevy build something like that?
They are doing it right now and expect to see it in the dealers early next year: Pontiac G8.
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Old 02-04-2007, 12:56 PM   #16
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Re: LS7 Engine

I want one
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Old 02-04-2007, 02:44 PM   #17
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Re: LS7 Engine

I'm big into the current generation motors, and my truck will definitely have one. The LS7 is nice in a completely built crate motor package, but isn't cheap. I'm probably going to build my motor on the LSX block. I hevent decided if I want it to be a 400, 427, or 454. I've been leaning towards the 400, so I can run the 8/400 badges. Then again, I'd hate to leave the extra cubes on the table.

For those who aren't up to date in these new small blocks, GM has just introduced the LSX small block from their performance parts division. It should be available in March. Its an iron block while the LS7 is aluminum, but its built for bigger displacement and more power. Parts are interchangeable with current GenIII and GenIV motors and has identical physical dimensions. It comes stock in a 4" bore, but can be bored out to 4.25+ to fit your needs. The first version of the block takes a 4" stroke while an extended deck version will handle a 4.50" stroke. For those of you doing the math, its possible to get 500+ cubes out of this small block motor, and they've designed it to withstand 2000+ hp! Read about the block here: GM High Tech Performance Article

GM performance parts build Reggie Jackson a classic Camaro to showcase this motor at SEMA. They chose a 4" stroke and bored the block to 4.25 to make a 454 ci small block. It made 640 hp and over 600 tq. Read about it here: Reggie's LSX 1969 Camaro
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Old 02-04-2007, 07:42 PM   #18
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Re: LS7 Engine

Wow weee! This just gets better as it goes. All kinds of possibilities out there . Guess its time to quit the old school stuff and get with the NEW IDEAS. Matter a fact a while back I had and engine very close to these listed for sale on this site. Thinking it was Posted on General Disscussion. Never did sell still sitting in the corner........far as I know. hmmmph better go dig it out.Take another look at it.....Thanks for the wake up call guys....Larry
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Old 02-04-2007, 11:32 PM   #19
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Re: LS7 Engine

love the scoop kelsfine69, just like what i wanted to build. Cept i was going dual 750 double pumpers on a tunnel ram manifold and sitting it down on some configuration of a mid 70's 454.
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Old 02-04-2007, 11:41 PM   #20
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Smile Re: LS7 Engine

http://www.superchevy.com/technical/...09sc_assembly/

Here is some very nice to know information about these ls7 and o6 engines. Larry
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Old 02-05-2007, 10:06 AM   #21
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Re: LS7 Engine

its amazing to see a factory motor hand assembled, gotta love these motors and the technology behind them.
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Old 02-05-2007, 10:24 AM   #22
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Re: LS7 Engine

Good Lord, that thing makes 400hp at about 2300 rpm? There's no 4 second delay on that motor.
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Old 02-05-2007, 01:05 PM   #23
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Re: LS7 Engine

I just checked with my parts manager and the small block LS7 retails for 17 grand $17,000.00, so you better want one BAD!
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Old 02-05-2007, 07:09 PM   #24
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Re: LS7 Engine

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I just checked with my parts manager and the small block LS7 retails for 17 grand $17,000.00, so you better want one BAD!
I found LS7 for $12,999. at
http://www.sdpc2000.com/catalog/4152...Cubic-Inch.htm
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Old 02-05-2007, 07:17 PM   #25
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Re: LS7 Engine

Quote:
I found LS7 for $12,999. at
http://www.sdpc2000.com/catalog/4152...Cubic-Inch.htm
That one probably doesn't include all the additional items that you'll need to run it though.
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