LS7 Swap
Thread Starter
Intermediate
Joined: Apr 2007
Posts: 32
Likes: 0
From: Bridgeview IL
LS7 Swap
Hello everyone,I am debating on swapping out my LS2 engine for a LS7.I have a 07 MN6 Coupe and was seeking some advice on what other parts i would need(besides the 427)ECM,Harnesses,etc. Any input would be appreciated Thnak you again
Racer
Joined: Jul 2005
Posts: 316
Likes: 0
From: Suisun
I swapped out my LS2 for a forged LS7 shortblock. The LS2 was damged when my timing chain broke. I reused my Trickfow 225 and FAST intake. Didn't have to change anything else. If your planning on swapping your stock LS2 for a stock LS7, it's gonna cost you a pretty penny. Don't forget, you'll need to cenvert the LS7 to a wet sump system.
Good luck.
Good luck.
Instructor
Joined: Nov 2007
Posts: 118
Likes: 0
From: Calgary Alberta
Drifting
Joined: Sep 2005
Posts: 1,371
Likes: 2
From: Gilbert AZ
Swapped out my LS2 for an LS7. LS2 is going in my solstice. You don't need an ECM or the wiring harness. Infact supposably is better to use the LS2 ECM, because more software is available for it.. 
Car should be starting for the first time tommorow. I went with a WET oil system, however you could easily do dry sump, and cheaply.
Car should be starting for the first time tommorow. I went with a WET oil system, however you could easily do dry sump, and cheaply.
Melting Slicks
Joined: May 2006
Posts: 2,891
Likes: 1
From: NJ..."the way I saw it, everyone takes a beating sometimes."
Check out the Lingenfelter site.
http://www.lingenfelter.com/Merchant...Category_Code=
http://www.lingenfelter.com/Merchant...Category_Code=
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Safety Car
Joined: Sep 2007
Posts: 3,902
Likes: 2
From: RIP Lotus
St. Jude Donor '09
Swapped out my LS2 for an LS7. LS2 is going in my solstice. You don't need an ECM or the wiring harness. Infact supposably is better to use the LS2 ECM, because more software is available for it..
Car should be starting for the first time tommorow. I went with a WET oil system, however you could easily do dry sump, and cheaply.
Car should be starting for the first time tommorow. I went with a WET oil system, however you could easily do dry sump, and cheaply.
Instructor
Joined: Nov 2007
Posts: 118
Likes: 0
From: Calgary Alberta
check out
http://www.mallettcars.com/solstice-conversion.htm
follow it all the way to Turbocharged LS7 Package
http://www.mallettcars.com/solstice-conversion.htm
follow it all the way to Turbocharged LS7 Package
Le Mans Master
Joined: May 2006
Posts: 8,824
Likes: 3
From: The left Coast
St. Jude Donor '08
check out
http://www.mallettcars.com/solstice-conversion.htm
follow it all the way to Turbocharged LS7 Package
http://www.mallettcars.com/solstice-conversion.htm
follow it all the way to Turbocharged LS7 Package
Drifting
Joined: Jul 2004
Posts: 1,713
Likes: 2
Instructor
Joined: Nov 2007
Posts: 118
Likes: 0
From: Calgary Alberta
It might be cheaper and easier to install but it will be it will never be faster. Turbo chargers don't have the parasitic losses that superchargers have. This size of supercharger will require ~50-75 hp to drive. Sized properly modern turbochargers (specifically ball bearing turbos) have virtually no turbo lag so will deliver the same or more boost as superchargers without the parasitic loss. The efficiency of the compressors can only be compared on a case by case basis but since they are both centrifugal compressors the efficiency will be comparable.
Le Mans Master
Joined: Dec 2006
Posts: 7,251
Likes: 16
From: Phoenix Arizona
what a fricken engine! 
i think i did something on my shorts!
how much does the engine weigh with wet lubrication/oil pan?
CF Senior Member
Joined: Feb 2006
Posts: 23,313
Likes: 25
From: Tucson Arizona
Check out the Lingenfelter site.
http://www.lingenfelter.com/Merchant...Category_Code=
http://www.lingenfelter.com/Merchant...Category_Code=
If you live closer to Texas than Indiana, 21st Century Muscle Cars is an authorized Lingenfelter dealer/installer. From my experience, 21CMC was a pleasure to deal with both professionally and personally. My 403 package has been incredibly reliable and needless to say...the car blasts!
Burning Brakes
Joined: May 2007
Posts: 1,171
Likes: 4
From: Columbia Maryland
It might be cheaper and easier to install but it will be it will never be faster. Turbo chargers don't have the parasitic losses that superchargers have. This size of supercharger will require ~50-75 hp to drive. Sized properly modern turbochargers (specifically ball bearing turbos) have virtually no turbo lag so will deliver the same or more boost as superchargers without the parasitic loss. The efficiency of the compressors can only be compared on a case by case basis but since they are both centrifugal compressors the efficiency will be comparable.