AgaveCorvette

WTF?

Why are you some of you guys putting 5.3 truck heads on your cars? <img src="gr_images/icons/wink.gif" border="0">

?

Are you doing it for the increased compression? Is it really work the loss in flow (in stock form) over the 5.7 heads?

IF you want the compression why not do it RIGHT and change out the pistons? :squint:

CHRISPY

LOL!
Less milling to get high compression but you have to do port work to get the flow numbers up there again. I am shooting for 11.2:1 comp out of my ARE 5.3L heads.
Cheers,
Chris

VINCE

iTrader: (1)

I cant believe you did not do a search.. <img src="gr_stretch.gif" border="0">

Bad Habit Bird

iTrader: (12)

I dont know of anyone putting stock 5.3 heads on there car. People get the 5.3 heads ported to flow like ported 5.7 heads and then bolt on the 5.3's because of the smaller combustion chambers.

AgaveCorvette

[quote]Originally posted by vmoore:
<strong>I cant believe you did not do a search.. <img src="gr_stretch.gif" border="0"> </strong><hr></blockquote>

:squint: I don't need to search I'm here all the time. <img src="gr_stretch.gif" border="0">

I just don't understand paying good money for truck heads and THEN spending even more to have them ported. :shrug:

CHRISPY

If you are getting a Stage 2 head from a vendor the cost is the same. Core charge (AFAIK) is the same. They both require porting and valve change.
Cheers,
Chris

AgaveCorvette

(as compared to buying a set of LS6 heads or spending more money on a set of LS1 5.7 heads.)

If you want the compression, change the pistons.

It just reaks of "cheap" to me.

AgaveCorvette

[quote]Originally posted by Chris ARE 360:
<strong>If you are getting a Stage 2 head from a vendor the cost is the same. Core charge (AFAIK) is the same. They both require porting and valve change.
Cheers,
Chris</strong><hr></blockquote>

I did not realize the cost was the same, but then again I do my own head work.

I understand, now.

Cheers,
Matt

AgaveCorvette

does the increased compression cause any problems with pump gas?

CHRISPY

That depends on cam choice, AF ratio and timing advance but if you use 93-94 octane and a reasonable timing curve you will be fine <img src="gr_grin.gif" border="0">
Chris