The Grond Chronicles : LS1 & LS2, Side by Side <Pics> [Dialup; Cardiac Arrest
 

I thought it might be useful to other members if they saw the differences between the LS1 block and the LS2 block, and to point out the potential pitfalls if you are building an LS2 from scratch.

So I unshipped my new LS2 bare block tonight to compare and contrast between the LS1 block and the LS2 block.

A C5 General First!

Enjoy

EG :cheers:

Firstly, huge thanks to Stangkiller for bringing back my LS1 block - the original Grond engine.
http://grondpix.com/ls1-ls2/ls1-ls2-0.jpg

Warning : Garage Queens may wish to avert their eyes..

Yes folks, a C5 can haul parts...
http://grondpix.com/ls1-ls2/ls1-ls2-1.jpg

Good fit :D
http://grondpix.com/ls1-ls2/ls1-ls2-2.jpg

OK. Let's get this bad boy unshipped
http://grondpix.com/ls1-ls2/ls1-ls2-3.jpg

http://grondpix.com/ls1-ls2/ls1-ls2-4.jpg

On with the comparo
http://grondpix.com/ls1-ls2/ls1-ls2-5.jpg

http://grondpix.com/ls1-ls2/ls1-ls2-7.jpg

http://grondpix.com/ls1-ls2/ls1-ls2-6.jpg

LS1 valley with knock sensors and ineffecient oil drainback design
http://grondpix.com/ls1-ls2/ls1-ls2-8.jpg

You can see the fundamentally different valley on the LS2.
Knock sensors are gone from the valley (relocated to the side) and oil drainback is much improved
http://grondpix.com/ls1-ls2/ls1-ls2-9.jpg

Here, the LS1 cam sensor and oil pressure fittings
http://grondpix.com/ls1-ls2/ls1-ls2-10.jpg

And here, the LS2 cam sensor is moved to the front
http://grondpix.com/ls1-ls2/ls1-ls2-11.jpg

Many changes on the front.
Note: oil plugs in block
http://grondpix.com/ls1-ls2/ls1-ls2-12.jpg

Some of the changes are interesting, like the smaller oil galley on the top, the 2 tapped holes for the LS2 timing chain tensioner
Note: new oil plugs for the block need to be bought otherwise massive oil leak on first fire!
http://grondpix.com/ls1-ls2/ls1-ls2-13.jpg

Rear view.
http://grondpix.com/ls1-ls2/ls1-ls2-14.jpg

Mustn't forget - New dowels and oil plug to buy and install
And Made in Canada :D
http://grondpix.com/ls1-ls2/ls1-ls2-15.jpg

Dowels for heads to either transplant or buy new. I prefer to buy new.
http://grondpix.com/ls1-ls2/ls1-ls2-16.jpg

http://grondpix.com/ls1-ls2/ls1-ls2-17.jpg

Note, awesome oil passage change for the lifters!!
http://grondpix.com/ls1-ls2/ls1-ls2-18.jpg

http://grondpix.com/ls1-ls2/ls1-ls2-19.jpg

Lest we forget this is a LS2!!!
http://grondpix.com/ls1-ls2/ls1-ls2-20.jpg

Here, water jacket plug and oil plug to either remove and transplant or buy new.
http://grondpix.com/ls1-ls2/ls1-ls2-21.jpg

I prefer new. Don't forget lots of Locktite Red
http://grondpix.com/ls1-ls2/ls1-ls2-22.jpg

http://grondpix.com/ls1-ls2/ls1-ls2-23.jpg

http://grondpix.com/ls1-ls2/ls1-ls2-24.jpg

Keep da pix coming. :cheers:

EG it has to be the HEAT and Humidity in Florida to have you go through these changes :rofl: I must give it to you..you DA MAN :cheers:

:cool: :thumbs: :thumbs:

Great comparo! Thanks for your time and effort!

:thumbs: :cheers: :thumbs:

Where is the gospel disclaimer? :rofl: Now get back into the garage. :toetap:

Just trying to give back a little to the Vette Community that has been so good to me :cheers:

Great pics!!!! Is the block already machined for the knock sensors on the side? Also, don't forget about adjusting the oil pickup tube.:thumbs:

Awesome pics Stephen!!

The LS2 looks so much beefier than the LS1. I still love my LS1 though and won't give it up till it goes Grond. :lol:

Brand new bare block, took the wrapping off it 2 hours ago

LOTS of machine work to be done on it - not just knock sensors :D

Bigger is better :thumbs:

Great write up EG!I love looking at bare motors and see how it looks inside!

ok, now for some small talk...what do you mean by "unship?" how come you didnt say "unpack?" If you unship a package then it means you bonked the fedex guy over the head with your bologne and took back your package that you were going to send out. :willy: :D

I have nothing useful to add to this thread, but I wanted to get a post in on page one of an EG/Grond thread. I've never done it before!!! :party: :party: :party:


Kidding aside, those are really cool pics to compare the two. Can't wait to see what else you find.

thanks for spending the time to take & post the pics Stephen :thumbs:

That was interesting. When does the engine build start? Yes. I know. There's still allot of other things to do first.:thumbs:

Very cool stuff, I love reading your posts!

:cheers:

pretty nice comparison. thanx for sharing that.

the ls2 looks MUCH better suited for battle. good luck when things finalise.

Nice comparison Stephen...with the added Motor in my car, my car handled and hooked MUCH better...I think we got something here. :leaving: