I did basically the same thing to my head. The valve bowl areas were ROUGH.
Reading flow bench articles in some of the V8 magazines showing improvements gained by mild changes such as valve bowl work,nice performance valves,and a multi-angle valve job,I was inspired. I wanted to keep what I did mild,seeing cases (Nate Pharr back in the day for one) how ported and supposed better flowing heads have actually made a 4g63 SLOWER.
I had to replace valves,and Si valves were very affordable ($10 ea) so I also tried their competition SS valves seeing how low-lift flow was improved with good valves (undercut stems,more streamlined shape under valve) on some of the V8 heads I have seen tested. I had a machinist friend do a 5-angle valve job. A old budget v8 trick is to put a big (I dont remember what the degree) backcut on the bottom side of the stock valve to mimic the better flowing shape of a performance valve,I might have tried that if mine were good.
Yes,I know guys have gone 9's on totally stock heads. Whether or not what I did actually helped Ill never know,but my car runs pretty damn good for what it is,so I figure it didn't hurt. And it didn't cost much more than putting it back together stock..
#487/2000 Summit White
Edited by Ian M (11/03/05 06:48 PM)
Posts: 2343 | From: Martinsburg,WV | Member Since: 01/11/02 | IP: (126.96.36.199) |
I did the same thing that both of you guys did. Then I toke the head to a local guy to do a valve job and hot tank it. I'm sure it helps some. I didn't take off alot of metal just enough the make things right. When I saw this post that said with results. I thought it ment flow numbers or Dyno numbers.
1240/2000 - Sold 2004 Honda Pilot"It has VTEC!!!" Gave it back. 2005 WRX Wagon - Deer Hunter Edition--RIP 2003 Suzuki Katana 600
2000 Passat wagon crap car
Posts: 5707 | From: Virginia | Member Since: 03/25/03 | IP: (188.8.131.52) |