Easiest Big Power, LS1, LS2, or LS6?

[nitrorocket]

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.

[camcojb]

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

[rocketman]

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.

[tyoneal]

Originally Posted by nitrorocket

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.

Nitro:

What are "TEA" Heads?

Thanks

[nitrorocket]

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!!

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.

[Diognes56]

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

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

David

[tyoneal]

Originally Posted by syborg tt

If you are going down this road i have a brand new GM FSR LS2 Engine for $3700.00 plus shipping. I was going to buy it for my 2nd project but my wife said she get's half of everything and i can see the kids on weekends.

I said okay i'll wait till project 1 is complete

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

Thanks,

tyoneal

[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.

[Diognes56]

Originally Posted by tyoneal

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

Thanks,

tyoneal

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

Probably looks about like this:



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

David

[Project_Gotham]

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.