I Have A LS Motor And I Am Wanting To Put A Vtec Head On It. My Problem Is I Dunno If I Should Go With A SI Head Or A GSR Head. I Have Heard That SI Flow Better. But Everyone I Know Has The LS/GSR Swap. Any Help Would Be Great Thanks

 

The differences between the two are nearly negligible.

Cheaper one is the one I would get. Plus with the GSR, you already have a pool of knowledge on your friends.

 

well i dunno if it helps but i got a gsr block with a si head and that **** pulls hard stock... and ls is also a b18 1.8 liter non vtec.. well my best better prob would be the b16a2 si head, suspose to flow better too..

 

I Know The GSR Head Pulls Ok, I Just Didnt Know What The SI Head WOuld Do On A LS Block. Im Wanting Something That Pulls Hard Stock. Im just Thinkin I Might Have To Go With A B20/SI Set Up To Get What I Want.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by LsCivic18 &raquo;</TD></TR><TR><TD CLASS="quote">I Have A LS Motor And I Am Wanting To Put A Vtec Head On It. My Problem Is I Dunno If I Should Go With A SI Head Or A GSR Head. I Have Heard That SI Flow Better. But Everyone I Know Has The LS/GSR Swap. Any Help Would Be Great Thanks</TD></TR></TABLE>

A GSR head has a smaller cumbustion chamber. You will have a slightly higher cr
but the flow differenece is so small. they are both great heads in my opinion and a gsr head has a little more aggresive cams stock. but a gsr has the bypass valves so need a p72, the si has a better intake mani for high RPM. (im not posative on all my info im not 100 percent just trying to help)

 

Well Since The GSR Cam Is Alittle More Aggresive Then Why Couldnt You Put The GSR Cam In The SI Head. The Reason I Say That Is B/C I Am Trading For A SI Head.