All that I am upgrading on my head are valve springs and retainers. It is a GSR head, see sig for more details on setup.

Any info on how this may affect my max power? Or any dyno's on stock heads making big power?

 

Yes

I wouldn't run a stock chamber GSR head with 84mm bore. But thats me.

Nice build by the way.

 

my buddie was making 510 with a stock head , just valvetrain....... he's going to be making close to 700 this year with the same head

 

honda head were design very well...godlmember maded 550hp on a stock head inbetween a race the head blew or something withthe top end so they slapped on a stock head dynoed at harvs and made 550hp. with a full built motor he made 650whp.

 

I've also seen many instances where over 500whp is made with a stock GS-R head.

 

good to hear

 

515whp on a 100% completely stock head, 84.5mm bore zero problems.

 

what can you replace when you tear your head apart? at budget? what is essential to replacing on a head? just valve springs and retainers? and valve keepers?

 

You should be good with just Springs/Retainers till about 550whp or so.

 

basically after seeing that picture of the valve meeting the combustion chamber i got scared. what is the first weak point to break?

i only want replace what is going to cause major catastrophic damage.

 

Stock head good for over 600whp even in a B16A!!

https://honda-tech.com/zerothread?id=704660

 

how about cam? can i still use gsr cam?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by gsrt &raquo;</TD></TR><TR><TD CLASS="quote">how about cam? can i still use gsr cam?</TD></TR></TABLE>

NO! GSR cams are only rated for 499whp! Just short!


J/K GSR cams are fine or ITR cams. I had good luck with ITR cams

 

Boostfed the innvator...exactly what he posted stock heads have made alot of power.

I would love to run a GSR stock combustion chamber with a 84mm+ bore.. Read a little about quench area in Maxium Boost by Corky Bell. Lets just say we might be able to run MORE timing because of it..

 

500whp should not be a problem at all. I was about 425 at 10psi with stock ports and stock sized valves last year. This year I plan on being 650 with the same setup and a lot more boost. This is a P72 head btw.

 

search! my buddy makes 650hp

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by tRaCeBuStAbUsTeR &raquo;</TD></TR><TR><TD CLASS="quote">search! my buddy makes 650hp</TD></TR></TABLE>
Oh sure.Just tell him to search..lol..j/k
Glenn

 

yea its fairly easy to do it on a BONE stock head

 

I can think of at least 2 locals on bone stock P72 heads making 500+

 

Just FYI, I was hesitant on the stock head before with stock valves BUT it was all good!!! Stock head and valves with Skunk2 springs and retainers in the old head! If you are swapping in valvetrain though might as well upgrade the valves too!

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by gsrt &raquo;</TD></TR><TR><TD CLASS="quote">how about cam? can i still use gsr cam?</TD></TR></TABLE>

the stock gsr cams are great for turbo apps..... I would reccomend going ahead and upgrading the valves also....


Modified by ReDHaTcHy97 at 1:00 AM 2/27/2005

 

yeah i had to jump on the H-T bandwagon

 

I have tune multiple 600+ whp B series with stock ported gsr heads. and stock cams.

 

is there a problem running a big bore and stock sized chambers?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 5w20 &raquo;</TD></TR><TR><TD CLASS="quote">is there a problem running a big bore and stock sized chambers?</TD></TR></TABLE>

NO