SPOOLED UP

iTrader: (2)

Run a 5.3 engine with ported 5.3 heads milled to 59.5cc with a tu1 cam and 20+lbs boost on ls9 head gaskets?

Burken01

iTrader: (88)

59cc will put you in very high CR, E85 territory

Fondle

iTrader: (4)

yea what he said, too much CR

AutoRoc

ONLY if you want to make 900HP...

15 PSI should put you near 800.

robsquikz28

iTrader: (246)

Stock heads are what 61cc?
With a 9.5 CR
so down 2 points should make about 9.8 cR correct?
Hell many tuners want 10:1 or 10:4 CR for big boost especially if using e85 or 110 octane

Beatdown Z

iTrader: (18)

And don't forget the LS9 gaskets will lower the compression a little. Maybe a tenth, so you'd be at 9.7:1 CR. Not bad at all.

Run it and let us know what happens. Plenty of people have done it before...

SPOOLED UP

iTrader: (2)

So what would the compression be with the ls9 head gaskets?

How bout ls7 head gaskets?

Stock 6.0 head gaskets?

samdogmx

iTrader: (14)

stop guessing & put your info into a CR calculator

http://www.csgnetwork.com/compcalc.html

samdogmx

iTrader: (14)

oh & yes I would do it

slowlsx

iTrader: (28)

I dont run anything less than 10.0:1 but I run meth. That suoer low compression stuff is old school, more power you maie NA the more power youll make per pound and the easier it is to bring the turbo in. As long as timing is not cazy. I would look into the TU0 though but then again you d8dnt list what turbo your running.

SPOOLED UP

iTrader: (2)

IDK the bore stroke on a stock 6.0 let alone the exact specs of the 5.3 heads

Also the tu1 cam is what and leaning towards a t4 76 or 80mm turbo

HRHohio

Seriously?

Dude, do a search. The internet is your friend.

http://en.wikipedia.org/wiki/GM_Vortec_engine

Every spec you can imagine is out there... just ask a search engine...

http://letmegooglethat.com/?q=5.3+heads+spec

See?

Blackpanther99

iTrader: (8)

Shoot, id do it on E85. Give it a shot!

SPOOLED UP

iTrader: (2)

So when I input specs I get more CR than stock

3.78 bore
3.622 stroke
4.100 bore head gasket
.051 head gasket thickness
59cc heads
-6.0 dome
.008 deck height
give me like 10.6

But If I dont use a negative input like it says then im at 9.36

Burken01

iTrader: (88)

Some CR calculators say to use a positive number for negative cc...

You have to read the fine print

robsquikz28

iTrader: (246)

9.36 sounds good to me for a turbo build.
That CC is kind of low but not much lower than stock being 61.15 and people are pushing well over 20 lbs on those stock 706 heads.
Just get a solid tune, high octane gas or e85

87silverbullet

iTrader: (11)

I wouldn't hesitate to throw 20lbs at that. 9.3:1 is good for a pump gas and meth setup

Using your numbers, with a 0 deck height I get 9.76:1. You say your piston is sticking out 0.08 above the deck, did you measure that? I ask because then your compression jumps to 11.86:1. If I go the other way and you piston is 0.08 in the hole I get 8.34:1

Check over your specs to be sure that's what you have for your measurements.

ZonJuice

.008 not .080

87silverbullet

iTrader: (11)

Stupid me Didn't pay attention to that 1 little zero

Now i get 9.59:1 with it .008 in the hole and 9.93:1 with it .008 out of the hole

3pedals

iTrader: (3)

what is the bottom end, 5.3 or 6.0?
I think compression is too high if its a 6.0, but it will be fine on a 5.3