Anyone using an aftermarket block?
Who you chose ? Is there more benifit than using a GM block?

 

RHS block, if its in your budget!! Tons of features, aluminum, up to 501ci!

http://www.racingheadservice.com/LSBlock/

 

I'd go with LSX, handles up to 2500 hp and 511ci depending on deck height. It is made of cast iron, but weight doesn't concern me.

 

LSX block is the best bang for the buck.

 

it would really depend on youre application.

 

Erl sd2

 

Absolutely!!!!

 

you're not fitting a stroke in the lsx block long enough to make 511 cid

 

Doesn't the LSX block handle a 4.5" stroke with a 4.25" bore? I thought I read that somewhere for the tall deck block.

 

how big can you go on a tall deck then

 

I think 500 ci

 

No not in this lifetime unless you go really small on the cam core and the rods and rod journals. You "can" do it but it's a major deal with all custom crank and custom cam core and lifters. Then there's the problem that in the normal deck there's not enough cylinder although the tall deck would be good there but you still have the crank and cam issues.

 

im jumping ship.......selling off all of my 383 lt1 parts.i want to go big ls.

 

The RHS block has a raised cam just for this. So it can go 500ci without special parts.

My wife wont let me have one But that doesnt mean I cant dream and plan out my ultimate engine!

http://www.gmhightechperformance.com...ild/index.html

 

does the lsx block have a raised cam in the tall deck

 

No, One of the big issues with a large stroke is the small crankcase. You can raise the cam slightly for additional clearance but it becomes costly and the benifits are not worth the extra cost.

The RHS block addresses enough of the problems to allow a long stroke crankshaft. They move the oil galley outward, they raise the cam tunnel along with the tall deck you have the support for the piston.

Building a large cubic inch LS series engine is over rated in my opinion. While it's novel to tell everone that you have all those cubes (and the torque) you really limit the RPM and longevity of the build. I will smoke you at the track with a decent 430 to 440 cubinc inch build. It's less money and will last a lot longer.

There are a ton of blocks out there that will fit a specific situation.

If you want a high RPM application (9000 to 10,000) you need to watch out for the re fitted OEM style blocks. they cannot take the larger lifters or the spring pressurre without a lot of work.

Erik has done of ton of 460+ LS engines. If you must he can hook you up.

Robin

 

huh ??

Talking about a N/A motor?

 

Not so much with an N/A engine. Still rod length, piston height, ring stack are all effected and comprimised in a long stroke engine.

The overlap in the crankshaft from the main to the rod journals becomes interesting also. Such a large span in an engine with the bore spacing of a small block creates issues.

I am not saying that these cannot be done and make them live, it will take the right combination of parts and experience from a builder. Not some mail order combintion.

Again, my opinion FWIW.


Robin

 

I think your smoking something but it aint at the track.

All things being equal the bigger engine wins. FI or N2o changes that but we're not talking about power adders.

Like you said HKE has done plenty of them

 

Not always

That is a comon misconception.

At a certain point you run out of cylinder head for your N/A deal.

So given the current available cylinder heads my 440 will kick your 500 in the ***.

Also I can design a piston and ring package that will yeild better numbers that you can because of compromises involved in a large cubic inch small block.

Again, my opinion

Robin