Ls2 techco supercharger update!!!!!!
Thread Starter
Instructor
Joined: Feb 2009
Posts: 101
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Ls2 techco supercharger update!!!!!!
We have gone round and round trying to find the best way to complete our supercharger package for the LS2 without sacrificing hood clearance and any restriction. Here is the direction we are going.......
LS2 to LS3 head swap.
With the design of the LS2 heads compared to the design of the LS3 heads we feel that this is the best direction to go. We currently have 3 cars in house in process with this set up.
Pictures of the process is below. We will have details and hp gains, final pricing soon.
Even if we designed the blower to work with the LS2 heads with our twin screw runner design it would of taken entirely too long as well as sacrifice power gains, etc....
LS2 to LS3 head swap.
With the design of the LS2 heads compared to the design of the LS3 heads we feel that this is the best direction to go. We currently have 3 cars in house in process with this set up.
Pictures of the process is below. We will have details and hp gains, final pricing soon.
Even if we designed the blower to work with the LS2 heads with our twin screw runner design it would of taken entirely too long as well as sacrifice power gains, etc....
Safety Car
Joined: Sep 2007
Posts: 4,359
Likes: 6
From: Los Alamitos California
St. Jude Donor '09
I think you've taken the right direction. I assume you'll mill the heads a bit to keep the stock compression? Let me know what your plans are when you can, or I can come up sometime if that is easier for you. When is Pauzo picking up his car?
San
San
Drifting
Joined: Nov 2005
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Carlos, two questions for those who have LS2:
a) How much a set of LS3 would cost to buy from GM?
b) Is it just a swap or other parts and actions need to take place?
Maybe, I'll sum it up this way, for LS2 to get an LS3, what would it cost?
a) How much a set of LS3 would cost to buy from GM?
b) Is it just a swap or other parts and actions need to take place?
Maybe, I'll sum it up this way, for LS2 to get an LS3, what would it cost?
Last edited by Z_Rocks; Jun 25, 2009 at 09:49 PM.
Drifting
Joined: Nov 2005
Posts: 1,629
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What I was asking, was a general question for other shops who will be doing the install of your S/C for LS2. I just wanted to get an idea for LS2 guys, how much more gets added.
The L92 is also a great idea, will it work?
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Pro
Joined: Mar 2007
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From: CA
Hmmm, I posted up a thread about this, and I'm actually happy that you guys decided to go this direction. Now the only other issues are of course the heads flow better in certain areas, but when they hit the 5500-5800 RPM range they seem to drop off, just from all of the L92 heads I've had on many different motors this seems to be the issue. One of the questions above was the milling of the heads. I think you should leave them at the stock height and drop the 11:1 compression down, that wont hurt the motor, and it will put in some safety in the build as well. If you guys can get the heads ported in bulk you can save some serious money for people (again the other thread has the link to ebay deals on the L92 heads) You will gain alot of efficiency and stability of the motor, I'd even crank the boost from 6lbs to 8 and not be worried about it. REMEMBER there still is a market for 243 LS2 heads, just go over to the LS1 guys they still are buying the heads so that will also cut your cost factor down as well.
Drifting
Joined: Dec 2007
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Le Mans Master
Joined: Oct 2007
Posts: 6,149
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From: Greater Detroit Metro MI, when I'm not travelling.
Hmmm, I posted up a thread about this, and I'm actually happy that you guys decided to go this direction. Now the only other issues are of course the heads flow better in certain areas, but when they hit the 5500-5800 RPM range they seem to drop off, just from all of the L92 heads I've had on many different motors this seems to be the issue. One of the questions above was the milling of the heads. I think you should leave them at the stock height and drop the 11:1 compression down, that wont hurt the motor, and it will put in some safety in the build as well. If you guys can get the heads ported in bulk you can save some serious money for people (again the other thread has the link to ebay deals on the L92 heads) You will gain alot of efficiency and stability of the motor, I'd even crank the boost from 6lbs to 8 and not be worried about it. REMEMBER there still is a market for 243 LS2 heads, just go over to the LS1 guys they still are buying the heads so that will also cut your cost factor down as well.
Milling the heads some to regain compression at least into the low 10:1 range would be a good idea for a street car not looking for maximum power numbers.
Pro
Joined: Mar 2007
Posts: 573
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From: CA
Actully leaving them as-is will drop the 10.9:1 factory compression ratio down to about 9.8:1. You will lose efficiency, lose throttle response, lose off-boost torque (not a big deal since the twin screw is almost always on boost), lose fuel efficiency, etc...
Milling the heads some to regain compression at least into the low 10:1 range would be a good idea for a street car not looking for maximum power numbers.
Milling the heads some to regain compression at least into the low 10:1 range would be a good idea for a street car not looking for maximum power numbers.
Safety Car
Joined: Sep 2007
Posts: 4,359
Likes: 6
From: Los Alamitos California
St. Jude Donor '09
Actully leaving them as-is will drop the 10.9:1 factory compression ratio down to about 9.8:1. You will lose efficiency, lose throttle response, lose off-boost torque (not a big deal since the twin screw is almost always on boost), lose fuel efficiency, etc...
Milling the heads some to regain compression at least into the low 10:1 range would be a good idea for a street car not looking for maximum power numbers.
Milling the heads some to regain compression at least into the low 10:1 range would be a good idea for a street car not looking for maximum power numbers.
San
Instructor
Joined: Sep 2006
Posts: 152
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From: Bloomingdale IL
LS2 Techco Update
You have a deadline of June 30 for people who have LS2 and LS7 engines to commit to buy in order to get the free installation as well as tuning and dyno runs before and after installation. Is this date going to be extended for LS2 and LS7 since the procedure and cost is still undetermined?
Thread Starter
Instructor
Joined: Feb 2009
Posts: 101
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You have a deadline of June 30 for people who have LS2 and LS7 engines to commit to buy in order to get the free installation as well as tuning and dyno runs before and after installation. Is this date going to be extended for LS2 and LS7 since the procedure and cost is still undetermined?
Le Mans Master
Joined: Oct 2007
Posts: 6,149
Likes: 11
From: Greater Detroit Metro MI, when I'm not travelling.
I have a theory that you did those wheels and tires in preparation for going FI 
Safety Car
Joined: Sep 2007
Posts: 4,359
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From: Los Alamitos California
St. Jude Donor '09
San
Intermediate
Joined: Apr 2009
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From: CA
We will be doing Ported heads also for customers, as well as full engines
BT
Safety Car
Joined: Sep 2007
Posts: 4,359
Likes: 6
From: Los Alamitos California
St. Jude Donor '09
As we are looking at a decrease in CR from 10.9 to 10.4 (only 4cc diff in heads) we are planning on leaving them alone. We have worked these angles before, many times , with many projects. And the change is not that different to warranth the milling, and actually a little better for the blower.
We will be doing Ported heads also for customers, as well as full engines
BT
We will be doing Ported heads also for customers, as well as full engines
BT
San