k04/rs6 hybrids airflow character

Post by **s4woody** » Tue Jul 11, 2006 12:56 pm

i gone and got me some NA heads to go with my conversion.. just waiting for mine to blow...

Post by **dummi** » Tue Jul 11, 2006 1:41 pm

@ paul i'm hoping it will be

@ rob 30% more than s4 heads and still more than rs4 heads? so this means in port size small to large would be s4 -> rs4 -> NA interesting i had thought rs4 and na were similar hmmm more research i need to do

Post by **tartan_rob** » Tue Jul 11, 2006 3:35 pm

Yep, I can't remember if it was 30% over S4 or RS4, I think it was RS4 which made them approx 40-45% better than S4. Basically it is as you say S4 -> RS4 -> NA.

Post by **dummi** » Wed Jul 12, 2006 1:01 am

cool looks like na are the way to go

Post by **S2tuner** » Wed Jul 12, 2006 1:15 am

Sorry guys, need to set something straight here, NA heads flow 30% more than stock S4 heads, not 40-45%!!!! I wish we could get heads to flow that much more than S4 heads!!!!

Mihnea

Post by **dummi** » Wed Jul 12, 2006 2:20 am

thanks Mihnea your advice is always welcome

Post by **tartan_rob** » Wed Jul 12, 2006 8:07 am

My apologies Mihnea. Getting confused - easily done.....

Post by **s4woody** » Wed Jul 12, 2006 10:46 am

well mihnea watch this space cos my heads are going in to be worked..

Post by **S2tuner** » Wed Jul 12, 2006 10:52 am

I doubt you can get 45% more flow than stock S4 by having the heads ported unless you lose lots of flow at low valve lift. Trust me, I have been working on heads and doing my homework on this for long enough...

Mihnea

Post by **s4woody** » Wed Jul 12, 2006 12:36 pm

i dnt doubt that for 1 second.. but we'll see.. the guy i use was building cars,and engines when we were still a twinkle in our dad's eye..and we've prob forgot more than he knows so i,m happy to wait and see..round here he's known as the magician..and i,m happy to let him work his magic..

Post by **tartan_rob** » Tue Jul 18, 2006 8:45 am

Mihnea has managed to get my spool-up time down similiar to K03's. Good job.

Post by **dummi** » Tue Jul 18, 2006 10:29 pm

rob is that wih s4 heads?

Post by **tartan_rob** » Wed Jul 19, 2006 8:21 am

Yep. Std S4 heads, RS4 downpipes (200cell RS4 Cats) with gutted pre-cats and dual Milltek catback.

Post by **dummi** » Wed Jul 19, 2006 10:32 am

good results i'll be interested what mine does compared when finally complete

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k04/rs6 hybrids airflow character

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