Iron block has not proven to be any stronger, unless you are after well over 1000 hp, I would'nt take the extra weight. People have made over 1500 hp and gone 175 mph in the quarter on the aluminum block. I am at 1000 hp right now myself.

Patriot heads are factory heads. they are ported factory heads. TEA are the way to go here.

For low dollar, a 427" motor requires a new crank. Not cost effective. An aluminum block ls1 will be a 347, an ls2 block can go a little bigger on the cubes due to having a 1/10" bigger bore (3.898 vs. 4.00)

75's will be perfect and are the largest high imp injector made right now.

If you want more cubic inches the LS2 is the way to go; 402 is an easy stroker combo for that engine. I believe the LS1's need different liners and more mods to stroke.


Jody

A Ls1 block will need new sleeves to bore bigger.


I prefer an alumunin block when building big hp engines.

Afr and Trick flow are probably the best aftermarket head out there.

There is no substution for cube's,even when turbo'ed,while I haven't built a turbo motor I have done acouple Lsx style engine they like cubes.

Nitro:

What are "TEA" Heads?

Thanks

Like they said cubes are everything. Depends what you want too, My littel 347" ls1 get 20 mpg on the freeway and makes 1000 hp, a 427 I would guess might get 15 mpg and make 1150-1200 hp on the same setup. My old na 427 sbc got 10 mpg on the freeway!! :faint:

TEA (TOTAL ENGINE AIRFLOW) is a very reputable and state of the art head porting company. Good bang for the buck. My motor made 430 rwhp through an A4 with TEA stage 1.5 heads and a tiny 224/224, .581 hydraulic cam. Shop around for specs and prices before you buy any head because I got a kilelr deal on porting at the time. Darts are also super cheap for the money, but I wanted a low dollar setup so I stuck with a factory head. I tried to stick with factory original parts as much as I could, it is less stressfull to beat on a motor knowing it only costs less then $3,000 to completely replace the entire engine if you grenade it! Depends what your budget is.

You might check with Speed Inc. They like LSx/Turbo/Pro-touring :yes: :) .

Check this out: http://www.ls1speed.com/59/

David

Can you give me some more info on the, "FSR", LS2?

Thanks,

tyoneal

Just watched the Video on the Motor Trend Web Site.

That 455 LS2 Turbo GTO Kicked some serious ASS for a Heavy car and one not obviously built for speed like the Ford GT, Viper and Vette.

I guess they re-sleeved the hell out of the LS2 to get that kind of size, right?

It would be neat to see them go to Bonneville and really stretch their legs.

I call, "Shotgun X 5"!!

tyoneal

BTW: Thanks for the company information. I'll take all I can get.

I am thinking he means "factory stock replacement", "full service replacement" or something like that.

Probably looks about like this:

http://www.sallee-chevrolet.com/Chev...s/cratels2.jpg

If it is what I am thinking it is, $3,700 is a heck of a deal :yes: . I would be all over that if I had the money :( .

David

If you get an LS1 I would look for a 2001 and up block if you plan to stroke or go for bigger HP numbers because of the changed oiling system apperently due to hard exelleration/cornering oiling problems. Most 2001+ engines have the LS6 intake manifold too. Don't get me wrong. 1998-2000 LS1's are great. My buddy has a MTI built 99' 427 Ls1 and has not had any oiling issues. I guess the safer the better.
Easy Hp is correct with these motors. On my Zo6 I had a Heads and Cam package with LG Longtubes, TPIS Throttle body, Tune, and got 532 Flywheel, 452 rear wheel Hp.


LS2 are considered gen IV rather than Gen III (Ls1/6) because:

• LS2 blocks feature a 4.00" bore, LS1 / LS6 have 3.888"
• Crankshafts, connecting rods, pistons and cylinder heads are interchangeable between LS2 and LS1 / LS6 engines
• LS2 cylinder heads are made from the same castings as the LS6
• LS2 blocks have the knock sensor on the side of the block compared to LS1 or LS6 block that have it in the lifter valley.
• The cam sensor has been moved to the timing cover (requires use of LS2 cam gear)
• LS2 knock sensors send a different signal type and are not interchangeable with LS1 / LS6
• LS1 computer will control LS2 engine, except for the knock sensors.