LS 2 Retrofit
Thread Starter
Racer
Joined: Aug 2000
Posts: 420
Likes: 31
From: Greenville SC
LS 2 Retrofit
Has anyone done a retrofit of the LS 2 being offered by GM into a older c5? GM offers a book of helpfull hints for $84 has anyone seen it? If you have any experience with this please post. Thanks
Melting Slicks
Joined: Mar 2003
Posts: 2,744
Likes: 9
From: FL
Cruise-In VI Veteran
The problem right now is the knock sensors. They need to be "bypassed" in the PCM.. Other than that, it's an easy swap. I personally wouldn't go the LS2 route until the knock sensor issue is taken care of. I want to retain them..
Former Vendor
Joined: Mar 2004
Posts: 1,518
Likes: 7
From: Valencia CA
I will probably be building a 402/408 set-up shortly with an LS2 block and topping it with a set of AFR 225's. Im strongly considering the use of a solid roller which would require deleting the KR function anyway. I'm curious if there is a publication that would aid in the conversion. Either way I will work my way thru it, but a book from GM sounds to good to be true. From what I've read, there doesn't seem to be a whole lot of issues with the conversion. I will keep you guys abreast of my progress.
Tony M.
Tony M.
Burning Brakes
Joined: Jun 2002
Posts: 1,055
Likes: 0
From: Troy MI
Originally Posted by Tony Mamo
I will probably be building a 402/408 set-up shortly with an LS2 block and topping it with a set of AFR 225's. Im strongly considering the use of a solid roller which would require deleting the KR function anyway. I'm curious if there is a publication that would aid in the conversion. Either way I will work my way thru it, but a book from GM sounds to good to be true. From what I've read, there doesn't seem to be a whole lot of issues with the conversion. I will keep you guys abreast of my progress.
Tony M.
Tony M.
Interested also, what are you using for the crank, rods, and pistons?
Team Owner
Joined: Oct 1999
Posts: 31,976
Likes: 487
From: Guinness Its whats for B'fast JAWGA
CI 3-4-5-9 Veteran
Originally Posted by Steve92LT1
The problem right now is the knock sensors. They need to be "bypassed" in the PCM.. Other than that, it's an easy swap. I personally wouldn't go the LS2 route until the knock sensor issue is taken care of. I want to retain them..
Please post a link to the book
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Former Vendor
Joined: Mar 2004
Posts: 1,518
Likes: 7
From: Valencia CA
Originally Posted by msuc5vette
Interested also, what are you using for the crank, rods, and pistons?I will share the entire build with you guys much like I did my stock short 346 build up. Its probably months from completion, but I have already started accumulating the parts and the most of the "planning" is behind me.
Will keep you posted...
Burning Brakes
Joined: Sep 2001
Posts: 1,173
Likes: 1
From: Aguila AZ
I have an LS2/421 stroker installed in my C5 road race car... I have no issues with the conversion. I installed the knock sensors on each side of the block and used a modified KS harness... At this time I am running on the rich side (12:1 AFR) and have had very few KR events... Not sure if they are working properly or not...
My installation includes the LS2 intake manifold and 90mm LS2 T/B, AFR 225 heads milled .030, LS2 cam position sensor and cover, and LS2 valley cover. It also has a Lunati 4.125" stroker crank, Diamond forged pistons, 6.125" forged I-beam rods and the stock sleeves are bored .030 over...
Sorry, no dyno info at this time but I am very pleased with the results. I have no problem running down a new C6 with 427 from a well known tuner...
Shirl
SD Racing Enterprises
Aguila, AZ
My installation includes the LS2 intake manifold and 90mm LS2 T/B, AFR 225 heads milled .030, LS2 cam position sensor and cover, and LS2 valley cover. It also has a Lunati 4.125" stroker crank, Diamond forged pistons, 6.125" forged I-beam rods and the stock sleeves are bored .030 over...
Sorry, no dyno info at this time but I am very pleased with the results. I have no problem running down a new C6 with 427 from a well known tuner...
Shirl
SD Racing Enterprises
Aguila, AZ
Burning Brakes
Joined: Sep 2001
Posts: 1,173
Likes: 1
From: Aguila AZ
My exhaust system is Melrose 1-3/4 long tube headers, gutted cats and B&B PRT mufflers. I have a video clip of my first time down the drag strip. I'll post it if someone can tell me how to do it..
Shirl
Shirl
