Race-Prep

Race-Prep announces the arrival of the largest displacement LS(X) engine on the planet! With the capability of producing up to 500ci displacement, this engine will be capable of DOMINATING the competition. Based on the extrordinary sucess of our previous 445ci builds, Power figures can be expected to be in the 700+HP range for a pump gas setup and the sky is the limit for a racing style engine, preliminary estimates put the race engine in the 850+HP range. The engine is modified for the displacement by ERL Performance, a very reputable and reliable designer and builder of deck plate systems and components. All parts are CAD designed and computer engineered to be reliable and provide many many thousands of miles of service in your street or race car. Race Prep is offering to its customers and the public a chance to be the first to obtain this level of performance from a streetable powerplant like this. We have been granted a distributorship from ERL based on our outstanding customer service and production of only the finest engines over the past four years. Race-Prep is very proud to be in this small number of companies selected as distributors by ERL as they hand picked only the best and most trustworthy companies in the LS(X) industry. The proposed engine build would consist of a "no holds barred" type of build where Race-Prep would be allowed full reign of the project (consulting with the customer of course) to achieve a level of performance never before produced by an LS(X) engine. Race-Prep assures the chosen customer the utmost power production for the application along with supreme streetability if chosen for a street car. If you want to get in on this, please call Race-Prep for details @ 760-200-5155 or E-mail us at raceprepinc@aol.com. We are anxious to start this project and be the first to deliver the awesome power of 500ci of LS(X)!!

ddnspider

iTrader: (26)

DAMN! thats a big friggin CI LSX motor!you have any pics or specs of that?

RealQuick

iTrader: (14)

Race-Prep

I have a few pics from SEMA coming either tonight or tomorrow, this thing is a sight to see! I can't wait to get one into production!!

-Bryan

aggiez28

iTrader: (19)

only 500ci????

ddnspider

iTrader: (26)

ill take a guess at the bore and stroke.....im guessing either a 4.25stroke by ~4.33bore.....OR a 4.125 stroke by a ~4.39bore.am i close???

RyanJ

I was gonna ask if you were going to market custom headers and whatnot for the ERL stuff, but from the little bitty red section it looks like this is an in-house project type thing. I'd be curious about numbers for sure. In fact...I'd be REALLY interested what kind of bore/stroke/rod/piston comp. height combo you come up with. A 4.2x4.5 motor will need a 6.5+" rod to get a good rod:stroke ratio like some of the 427's we use now (1.5+). The ERL piece offers a taller deck than World so that should be good for FI folks that need some meat in their piston.

RyanJ

~4.200" bore, 4.5" stroke, Sleeved LS2 block, big custom crank.

http://www.google.com/search?hl=en&q....2*4.5*8*.7854

ddnspider

iTrader: (26)

naaa thats not close enoughi know the equation. do the math on my guesses the 4.25" stroke guess is 500.66CI and the other guess is 499.blablabla closer to a true 500ci motor

RyanJ

I'm going by what I saw in the ERL deck info sheet in the SEMA posts. They say a 4.5" stroke is max and you're not getting a sleeved LS2 block past 4.2" bore.

ddnspider

iTrader: (26)

ah gotcha i didnt see any of that info,maybe youre right.i dont like it being that far off of 500ci though....not close enough lol.

Race-Prep

It is 498ci to be exact, but that is close enough for me! Stock is 345.79 so there! LOL! The rod length is going to be 6.800" and still leaves enough meat in the piston for a nice big shot of spray, or a good amount of boost. If you were building a BIG boost setup, I would go with a slightly shorter rod to beef up the piston even more. You should see this thing, VERY nice work to say the least.


-Bryan

Race-Prep

Yes, I will be building the headers custom for the first few "in-house".

-Bryan

RyanJ

Cool. That 10.2" deck is huge. I hope you get a tester soon I want to see what 500cid does on the LSx platform and how reliable this will be with the sleeves and the two deck surfaces.

777

iTrader: (21)

I assume you would have to have a custom intake manifold? I'm still skeptical of this engine design. I'd like to see it work before I'd buy it. They run a deck spacer. Here's a pic.


I'd like to see this hold up to the high cylinder pressures of a forced induction application.

RyanJ

Two things I read last week. The sleeves are integrated with the decking I think, and the people out building stuff will be using intake spacers or a custom one, and custom headers.

WestSide

iTrader: (6)

RPM limits?

777

iTrader: (21)

IIRC the deck spacer is sandwiched between two gaskets.

RyanJ

Shouldnt be any limit besides the PCM. BBC guys swing cranks 4.5" or larger with heavier rods/pistons. Some to 8-9000rpm. A 6.8" rod helps.

RyanJ

Aren't the gaskets around the sleeves though? It doesnt matter I guess, its the water passages that will get pressurized in the top-most surface/gasket area and probably carry down to the middle gasket. If that's the situation, how hard would it be to pull these decks and replace that middle gasket?

The biggest benefit to ERL stuff is 10.2" deck vis 9.8 for World. Drawbacks are all the custom stuff around the heads, 4 gaskets, and a sleeved production block. I guess the results from Norris, Race Prep, and SAM will tell the tale.