Mercier

iTrader: (15)

Hi,

I am talking with Lloyd Elliot about working his magic on my 862 heads. I'm likely going with his "LE2" package and the recommended cam is 227/235 .619/.626 111 LSA. Motor is a 2000-ish 5.3. I am saying this as it has the fuel pressure regulator on the rail and the return. I have only had the vehicle about a month and haven't been able to check the block casting numbers but was told the motor was acquired as a complete unit.

I am considering having the heads milled .020" to up the compression a bit. I am also casually looking for a 6.0 motor or short block and am wondering if those heads milled .020 on a stock 6.0 would net me a compression ratio that could function with 93 octane fuel? (and what would that CR be?)

Thank you for your time.
Chris

KCS

iTrader: (20)

Taking .020" off would put you right around 58cc, which would be right at 12:1 with an LQ9 or LS2. With an LQ4, the dished pistons will get you to 11:1, which is really safe on 93 octane.

Mercier

iTrader: (15)

Ok so if/when I happen upon a 6.0 I will plan for a set of pistons or maybe a rotating assembly.

Follow up- if I were to stroke the 6.0, are the appropriate pistons available to get me the extra cubes and enough of a dish to get to the CR you mentioned?

Thank you for the help!

Mercier

iTrader: (15)

Doh. Nevermind. I understand what you meant now. Look for LQ4. 😉

HCI2000SS

iTrader: (2)

I'm running the 862 castings on a 61 cc on 6.0 LQ9 and I'm 11:5.1.

Mercier

iTrader: (15)

Sweet. What should I expect to pay for LQ4 in short or long block form?

Thanks!