Hi!

After having searched the web for ages I'd thought to ask here if anybody know how to identify an LS1 and by that I mean from which car was it taken out from and what kind of power the engine was supposed to have.

Here is some information.

At the rear of the block on the driver side is the following number #12559378 (Which should make it a 99+ block, I was told it was taken from a 2001 Firebird with the WS6 package)

WS6 package should have 15HP more than a "normal" Trans AM LS1 making it a total of 325 HP vs the Trans AMs 310HP.

There is another number on the driver side at the face where the transmission faces up. #H242 074 and #212138215 (the later is written with a lot of dots, like a matrix printer)

Heads number is #241 and the dotted number on the heads are #1045GK221365

And finally an assembly code of some sort on 2 places on the engine. (On the rear driver side head and on the driver side at the front on the block, it's on a sticked and not stamped on the block) #10YHB K010460431

Any help appreciated.

//Sven

 

The differance in HP that you are referring to, doesnt exist with in the engine. It is based off the ram air intake setup on the WS6. No Differance in engines.

 

Hi!

OK thought as much but wanted to make sure, but I'd still like to know where this engine came from. Good old curiosity.....

//Sven

PS, thanks for the info.

 

Head casting numbers can help determine the year
806 = 1998 (perimeter bolt valvecovers)
853 = `99 to early 2000
241 = late 2000 to `04

Also F-body engines `98-`00 will have LS1 intake with EGR provision and the later engines have the LS6 intake without any EGR

 

Hi!

I have dual EGR valves so I assume I got the normal intake and not the LS6 one.

What kind of power am I looking at? 310HP as the Trans AM? and 325 if I build a cold air intake?

The Assembly code would suggest that the engine was built or put unto the car mid February 2001, did all the 2001 LS1 have the LS6 intake? tell tale is the EGR? or is there another tale tale one can check?

Thanks for the info!

Added:

"Engine Serial Number 10H7A H07190001 is used as an example:



The first two digits, 10 identify the component ID.
The next three digits, H7A, identify the engine model.
The next digit, H, identifies the plant code as Holden.
The next two digits, 07, identify the engine model year as 2007.
The next three digits, 190, identify the Julian date the engine was manufactured as day 190.
The next four digits, 0011, identify the assembly plant sequence number as 0011."

The above is taken from an Aussie site. http://forum.grrrr8.net/showthread.php?t=4617

//Sven

 

If you have a 01' Trans Am then you have a LS6 Intake no matter what. What is the number on the passsanger side cylinder Head located on the bottom right. Should be 241. Let us know.

 

Hi!

The cast number on the heads are 241. I was told the engine came out of a 2001 Trans AM WS6 I'm just curious to find out more information about the engine. The engine is going in my 2nd gen Firebird.

Thanks for the info.

//Sven

 

Also it won't have an EGR system like you stated before.
BTW All LS1's are 345-350 HP no matter what car or model they were installed in.

 

Just slap a cam and some Longtubes on here and you will be right around 400

 

Hi!

I do have two EGR looking devices attached to the exhaust manifold on either side of the engine if they are not an EGR system what are they? (One on each side) can they be removed? (In other words are they important or have something to do with the fuel economy)

They all had that amount of power? thought that they came with different cams and tunes to the software.

//Sven

 

hehehehe yea that would be nice....

Right now it'll have to do untill I've gotten it running.... Have a lot of work just trimming the harness and getting the software changed to work without the ABS and stuff.

//Sven

 

The tubes you are referring to are for the secondary air injection and they can be deleted with no impact on fuel economy. You really can't use them unless you go through the hassle of installing an air pump on your car to attach them to.

The LS1 corvettes did have different cams, but it's probably due to the lack of EGR and not to improve power(the 01-02 f-bodies also got a different cam than earlier models when the LS6 intake replaced the LS1 piece to compensate for the removal of the EGR). The f-bodies actually had more rear wheel horsepower than the vettes, so that tells you the engines were underrated to keep the corvette as top dog.

 

Hi!

Thanks for the very informative answer!

Just checked a few pictures and from what I can tell the pre 2001 with the EGR had the tube close to the throttle body and even obstructed the flow a bit while mine don't even have a port at all that even comes close to an EGR sized port... (Nothing on the top close to the throttle body) In other words I got an LS6 intake and can throw away the secondary air system without any problems.... and to top it off have around 345-350 HP even though the official numbers is around 310-325? I'm one happy duck!

Thanks a lot for all the help guys/girls!


//Sven

 

Sweet, Can you throw some pics up of the 2 gen it is going in to up

 

Hi!

I can do one better..... A Youtube video of my car att idle although it was with the old engine in it....

//Sven

 

That is AIR which is equipped on my 01 (don't know about others). EGR is another piece that is coming off of the Intake Manifold right behind the TB. All clues point to an 01/02 Engine here.