msydnor

iTrader: (3)

Why?

albumleaf

iTrader: (7)

In the same way that he says that interracial marriage is a sin, while concurrently identifying as a closet homosexual who jerks off congressmen in airport bathrooms.

ZX-Tex

iTrader: (15)

Still learning about it myself. However, I have been told the way to go by a couple of racers is the type with the electric pressure control valve or 'EPC' valve that is triggered by a pressure transducer. The valve opens when the oil pressure is low, allowing the Accusump (accumulator) to pressurize the system. No need for intervention on the user's part.

Ignoring the valve for a minute, it works somewhat like a pressure tank on a well. The tank is teed into the supply line. It charges up with fluid using a bladder that is compressing air in a tank (the Accusump uses a piston). When the supply line pressure drops, the compressed air in the tank forces fluid from the tank back into the supply lines to maintain pressure. Simple.

the_man

That would seem to make sense. I'd like to see both systems installed and/or in action, and I'd definitely like to hear more about the LS7 dry sump system. I was trying to dig up information on Corvette forums, but those things are full of idiots who don't know anything. Of course the upside of that is that I'm right at home.

Joe Perez

iTrader: (8)

(source for following: The GM LS7 Engine)



The LS7's oil pump is really two pumps in one: a 0.95ci pump for supply (the same spec as the LS2) and a 1.41ci rotor for oil scavenging. The scavenge pump needs more capacity because it will consequently pick up air along with oil.




Here's a look at the special dry-sump oil pan. Because of the dry-sump system, there are two drain plugs, indicated by the cast-in line running between them. And before you ask, the answer is no: the LS7 pan--and corresponding dry sump system--will not bolt up to an LS1 or LS2 engine. There are too many differences with the front cover, crankshaft and other components.




Here's an article about retrofitting an LS7 into a '69 Camaro, including the dry-sump system: http://www.hotrod.com/howto/hrdp_070...wap/index.html

the_man

LS9 Miata anyone?

Thanks for the info, Joe.

rlogan

iTrader: (21)

You need something like this....assuming you go accusump route...
CANTON 3 QUART ACCUSUMP OIL ACCUMULATOR WITH EPC VALVE:eBay Motors (item 200385108843 end time Oct-17-09 12:21:06 PDT)

The other type is basically a preoiler only...

buffon01

iTrader: (9)

LS1
NO AFFILIATION

corvette ls1 motor -sale---------

blrx7r1

iTrader: (4)

Not trying to continue derailing the thread but the difference with the examples given are none of those 'manufacturers' make motors so they have to use other brands. Unlike pulling a Mazda motor for a GM. Not saying it's good or bad, to swap motors, just that the examples given were not the best.

Personally, I'd like to see a Lsx swapped Miata. I think it'd be cool to look at. I don't think I'd like one though. My opinion might change if my turbo 1.8 blows.