Help me build my F/I 6.0

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07-10-2011, 03:14 PM

#21

Midnight

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After playing around with a CR calculator, the final CR with these heads, LS9 gaskets, and the pistons Im going with, will result in around a 9:1 ratio. Should do well for FI.

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07-10-2011, 08:14 PM

#22

AKlowriderZ71

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Go at least 9.5:1 Jake.

I'm going to build 10:1 if I ever can afford it.

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07-12-2011, 12:49 AM

#23

Midnight

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Nah, 9:1's good for my setup, you'll see!

Last edited by Midnight; 07-30-2011 at 02:18 AM.

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07-12-2011, 03:04 AM

#24

1SlowHoe

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What number did you use for the LS9 compressed thickness in your CR calc?

9.1:1 is fine if you are going to throw a bunch of boost at it. I think AK was saying to go higher so it doesn't feel like a turd DD out of boost. However, in a RCSB you will probably still be fine. I went 10.4:1 but a Tahoe is a little heavier than a RCSB

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07-14-2011, 02:10 AM

#25

Midnight

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Yeah it was around 9.2:1 give or take, so I thought that would be alright. Some info I've found on the LS9 head gaskets compressed is that they're around .040-.052. I plan to get the LS3 heads worked over some, so it will probably be closer to 9.3-9.5:1 in the long run.

Roger is a god amongst men when it comes to blown ls engines, so he's probably right

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07-30-2011, 02:17 AM

#26

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Quote:

Originally Posted by zero2sixT

Mad, really? It isn't the best money spent on a boost engine. But not saying it's a waste. You can make big power with stock 317s and FI. Just saying.

Not going to tell me? Guess I need to go get some tylenol pm's. Going to be hard to sleep tonight.

Relax, dont get butt-hurt.