LS7 Engine - The 1947 - Present Chevrolet & GMC Truck Message Board Network

larry may · 02-03-2007, 11:48 PM

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

Skip Greaney · 02-04-2007, 12:05 AM

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!

Skip Greaney
2004 Suburban 4x4 8.1L
1990 Jag XJS 355 Chevy
2006 "Vette" Z06 #2758 of 6272

FarmTruk · 02-04-2007, 12:25 AM

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

427.6 ci (7008 cc)
Aluminum small block & heads
Bore 4.13" Stroke 4.00"
Forged crank and pistons
Titanium con rods
Dry-sump oiling
Composite intake
Titanium valves, In 2.20", Ex 1.61" (sodium-filled stems)
Valve lift 0.591", rocker ratio 1.8:1
Compression 11.0:1
Redline is 7,000 RPM

I want one too...

larry may · 02-04-2007, 08:53 AM

Quote:

Originally Posted by Skip Greaney

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!

Skip Greaney
2004 Suburban 4x4 8.1L
1990 Jag XJS 355 Chevy
2006 "Vette" Z06 #2758 of 6272

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

http://ozarkdragstrip.proboards39.co...ead=1141447979

**Boog** · 02-04-2007, 09:40 AM

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.

talonted1990 · 02-04-2007, 11:13 AM

Quote:

Originally Posted by Boog

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.

larry may · 02-04-2007, 11:16 AM

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

jimmydean · 02-04-2007, 11:46 AM

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?

JameslovesJammie · 02-04-2007, 12:01 PM

Quote:

Originally Posted by jimmydean

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.

Spray-Bomb · 02-04-2007, 12:56 PM

I want one

1LoC10 · 02-04-2007, 02:09 PM

Quote:

Originally Posted by JameslovesJammie

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

Gray Ghost · 02-04-2007, 02:34 PM

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!

BigTex · 02-04-2007, 02:44 PM

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

kelsfine69 · 02-04-2007, 02:47 PM

I have the LS7 454 GM Crate engine, works well.

cooters · 02-04-2007, 03:17 PM

unfortunately the term LS7 and LT1 are used far to often. The LS7 454 was never installed in a car from the factory, only the dealer put them in or buy over the counter. they came with aluminum heads from factory and were 450hp.

larry may · 02-04-2007, 07:42 PM

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

jimmydean · 02-04-2007, 11:07 PM

Quote:

Originally Posted by JameslovesJammie

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?

Walts_restoration · 02-04-2007, 11:32 PM

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.

larry may · 02-04-2007, 11:41 PM

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

Here is some very nice to know information about these ls7 and o6 engines. Larry

cooters · 02-05-2007, 10:06 AM

its amazing to see a factory motor hand assembled, gotta love these motors and the technology behind them.

67ChevyRedneck · 02-05-2007, 10:24 AM

Good Lord, that thing makes 400hp at about 2300 rpm? There's no 4 second delay on that motor.

**bigunde** · 02-05-2007, 10:46 AM

[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.

Skip Greaney · 02-05-2007, 01:05 PM

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!

70rs/ss · 02-05-2007, 02:18 PM

Well, compare that to the over 80 grand for an o7 Z06 and you're getting all the umph of the engine without the $80K jewelry box. It is one bad mother, and it comes with a warrentee!! I think the killer 572 can be had for less than that. $12-14k? I'm going to tell you old timers (me included) if you think they don't build em like they used to, your dead right, thay are faster and more economic than ever. I guarentee the 505 hp z06 is faster than any of the hemi, 429, 427, 454, 426 of the days gone by, and it'll turn (more than just heads). Albeit you could've bought one of those monster muscle cars for $5-8k new, that was like the $80k pricetag now.

Fastfun · 02-05-2007, 07:09 PM

Quote:

Originally Posted by Skip Greaney

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

02-03-2007, 11:48 PM	#1
larry may Senior Member Join Date: Jul 2005 Location: MISSOURI Posts: 3,256	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 __________________ The biggest problem people have, is other people Thou shalt be cool and not hassle Be a site supporter. The heart of the wise inclines to the right, but the heart of the fool inclines to the left." Ecclesiastes 10:2 Last edited by larry may; 02-03-2007 at 11:49 PM.

02-04-2007, 12:25 AM	#3
FarmTruk In Memoriam... Join Date: Nov 2006 Location: Wallburg, NC Posts: 1,216	Re: LS7 Engine First used in the 2006 Z06's. They are rocket ships. 427.6 ci (7008 cc) Aluminum small block & heads Bore 4.13" Stroke 4.00" Forged crank and pistons Titanium con rods Dry-sump oiling Composite intake Titanium valves, In 2.20", Ex 1.61" (sodium-filled stems) Valve lift 0.591", rocker ratio 1.8:1 Compression 11.0:1 Redline is 7,000 RPM I want one too... Attached Images __________________ '68 C10 SWB 307ci 2BBL *FarmTruk Pics Here* *"You know, doing what is right is easy. The problem is knowing what is right."*

02-04-2007, 09:40 AM	#5
Boog laying low Join Date: Mar 2001 Location: Searcy, Ark. USA Posts: 12,957	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. __________________ Boog 69 Chevy stepside, 358/T350, 4.11 posi, 4.5/4 drop, rallys, poboy driver primer is finer 91 Chevy sportside, Tahoe, Yukon & GMC Crewcab All GM..'nuff said. I stand for the flag and kneel at the cross

02-04-2007, 11:16 AM	#7
larry may Senior Member Join Date: Jul 2005 Location: MISSOURI Posts: 3,256	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 __________________ The biggest problem people have, is other people Thou shalt be cool and not hassle Be a site supporter. The heart of the wise inclines to the right, but the heart of the fool inclines to the left." Ecclesiastes 10:2

02-04-2007, 11:46 AM	#8
jimmydean Registered User Join Date: May 2005 Location: Beaverton, OR Posts: 3,728	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? __________________ New Project: 1966 LWB C20 Plans: 1/2 ton conversion Dropmember front Dropmember rear Corvette discs Restored raised bed http://67-72chevytrucks.com/vboard/s....php?p=4295210

02-04-2007, 12:05 AM	#2
Skip Greaney Junior Member Join Date: Jan 2007 Location: Land O' Lakes Florida Posts: 103	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! Skip Greaney 2004 Suburban 4x4 8.1L 1990 Jag XJS 355 Chevy 2006 "Vette" Z06 #2758 of 6272

02-04-2007, 12:56 PM	#10
Spray-Bomb Texas Big Wig Join Date: Jan 2007 Location: Mineola, Texas Posts: 5,620	Re: LS7 Engine I want one __________________ Just not low enough... ----------------------------- Sinister Killer

02-04-2007, 02:34 PM	#12
Gray Ghost Senior Member Join Date: Sep 2004 Location: Terrell, TX Posts: 1,967	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! __________________ Kelly '05 GMC Sierra SLE Z71 Bone stock except for new bed rail caps.

02-04-2007, 02:44 PM	#13
BigTex Registered User Join Date: Nov 2006 Location: DFW area Posts: 104	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 __________________ Richard 1970 Chevy (growing pile of parts) 2003 Silverado SS

02-04-2007, 02:47 PM	#14
kelsfine69 18 Till I Die Join Date: Mar 2005 Location: Alberta, Canada Posts: 1,522	Re: LS7 Engine I have the LS7 454 GM Crate engine, works well. Attached Images __________________ 2011 GMC Acadia 1969 GMC BBC LS7 2007 GMC Crew Duramax 1987 Camaro Iroc 350 Tuned Port Injection 42000Km 1987 Chevrolet Silverado 350 TBI 1987 Chevrolet Silverado 350 TBI(yes 2) Take me drunk, I'm too home...

02-04-2007, 03:17 PM	#15
cooters Senior Member Join Date: Oct 2006 Location: Edmonton Alberta Posts: 458	Re: LS7 Engine unfortunately the term LS7 and LT1 are used far to often. The LS7 454 was never installed in a car from the factory, only the dealer put them in or buy over the counter. they came with aluminum heads from factory and were 450hp.

02-04-2007, 07:42 PM	#16
larry may Senior Member Join Date: Jul 2005 Location: MISSOURI Posts: 3,256	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 __________________ The biggest problem people have, is other people Thou shalt be cool and not hassle Be a site supporter. The heart of the wise inclines to the right, but the heart of the fool inclines to the left." Ecclesiastes 10:2

02-04-2007, 11:32 PM	#18
Walts_restoration Real Projects never die Join Date: Jan 2007 Location: Lawrence, kansas Posts: 1,508	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. __________________ Ill put it this way, ive got a few lawn ornaments My name tag says Ryan KansasTwister On other forums

02-04-2007, 11:41 PM	#19
larry may Senior Member Join Date: Jul 2005 Location: MISSOURI Posts: 3,256	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 __________________ The biggest problem people have, is other people Thou shalt be cool and not hassle Be a site supporter. The heart of the wise inclines to the right, but the heart of the fool inclines to the left." Ecclesiastes 10:2

02-05-2007, 10:06 AM	#20
cooters Senior Member Join Date: Oct 2006 Location: Edmonton Alberta Posts: 458	Re: LS7 Engine its amazing to see a factory motor hand assembled, gotta love these motors and the technology behind them.



Register or Log In To remove these advertisements.

02-05-2007, 10:24 AM	#21
67ChevyRedneck Hittin E-Z Street on Mud Tires Join Date: Nov 2004 Location: Greenville, SC Posts: 23,090	Re: LS7 Engine Good Lord, that thing makes 400hp at about 2300 rpm? There's no 4 second delay on that motor. __________________ Jesse James 1967 C10 SWB Stepside: 350/700R4/3.73 1965 Ford Mustang: 289/T5-5spd/3.25 Trac-Loc 1968 Pontiac Firebird: Project Fire Chicken! 2015 Silverado Double Cab 5.3L Z71 2001 Jeep Wrangler Sport 4.0L 5spd 2020 Chevrolet Equinox Premium 2.0L Turbo 2011 Mustang V6 ~ Wife's ride American Born, Country by the Grace of God 1967 CST Shop Truck Rebuild! My 1967 C-10 Build Thread My Vintage Air A/C Install Project "On a Dime" Trying my hand at Home Renovation! 1965 Mustang Modifications!

02-05-2007, 10:46 AM	#22
bigunde Rusty Rockerfeller Join Date: May 2003 Location: South Georgia Posts: 1,631	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.

02-05-2007, 01:05 PM	#23
Skip Greaney Junior Member Join Date: Jan 2007 Location: Land O' Lakes Florida Posts: 103	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!

02-05-2007, 02:18 PM	#24
70rs/ss Registered User Join Date: Dec 2004 Location: Northern AZ Posts: 7,271	Re: LS7 Engine Well, compare that to the over 80 grand for an o7 Z06 and you're getting all the umph of the engine without the $80K jewelry box. It is one bad mother, and it comes with a warrentee!! I think the killer 572 can be had for less than that. $12-14k? I'm going to tell you old timers (me included) if you think they don't build em like they used to, your dead right, thay are faster and more economic than ever. I guarentee the 505 hp z06 is faster than any of the hemi, 429, 427, 454, 426 of the days gone by, and it'll turn (more than just heads). Albeit you could've bought one of those monster muscle cars for $5-8k new, that was like the $80k pricetag now.

Register or Log In To remove these advertisements.