Notices

High Flow, Low Cost, 8V Cylinder Head Project

 
Old 06-11-2012, 12:57 AM
  #46  
Paulyy
Professional Hoon
Rennlist Member
 
Paulyy's Avatar
 
Join Date: Jan 2010
Location: Melbourne, Australia
Posts: 7,090
Default

It looks like they're seated in low
Paulyy is offline  
Old 06-11-2012, 02:44 AM
  #47  
333pg333
Addict
Rennlist Member
 
333pg333's Avatar
 
Join Date: Feb 2006
Location: Australia
Posts: 18,491
Default

Originally Posted by refresh951 View Post
Thanks Patrick. Your pic has what I would consider a smooth surface. Your pic is exactly the surface finish I an shooting for. Where did the 4 valve head come from?
Oh just another project lying around.
333pg333 is offline  
Old 06-11-2012, 08:31 AM
  #48  
FBIII
User
 
FBIII's Avatar
 
Join Date: Nov 2003
Location: Doylestown, PA
Posts: 1,481
Default

Originally Posted by refresh951 View Post
This head in this picture was done for Alain by Parker in Canada. Anyone know anything about it. Looks like something is going on around the intake valves in the chamber but hard to tell.

It would appear that the intakes in this head are too big. The valves are almost touching the side of the combustion chambers.
FBIII is offline  
Old 06-11-2012, 09:17 AM
  #49  
refresh951
Moderator
Rennlist Member
Thread Starter
 
refresh951's Avatar
 
Join Date: Jun 2010
Location: Marietta, Georgia
Posts: 3,331
Default

Originally Posted by Paulyy View Post
It looks like they're seated in low
Yep, that's what it looked like to me too.

Originally Posted by FBIII View Post
It would appear that the intakes in this head are too big. The valves are almost touching the side of the combustion chambers.
Yes, it appears like a lot of shrouding, but word is this was an awesome flowing head.
refresh951 is offline  
Old 06-11-2012, 09:48 AM
  #50  
333pg333
Addict
Rennlist Member
 
333pg333's Avatar
 
Join Date: Feb 2006
Location: Australia
Posts: 18,491
Default

Originally Posted by refresh951 View Post
This head in this picture was done for Alain by Parker in Canada. Anyone know anything about it. Looks like something is going on around the intake valves in the chamber but hard to tell.

https://rennlist.com/forums/944-turb...-7l-16psi.html
Still don't believe 450whp [email protected] 16psi but by all accounts it's a fast car.
333pg333 is offline  
Old 06-11-2012, 07:29 PM
  #51  
refresh951
Moderator
Rennlist Member
Thread Starter
 
refresh951's Avatar
 
Join Date: Jun 2010
Location: Marietta, Georgia
Posts: 3,331
Default

Originally Posted by 67King View Post
By the way, I should also advise you that you need to make sure those are 1 piece valves. The majority of cheap valves are 2 piece, where the head is friction welded to the stem. Not as big of a deal in an NA application, but there's a lot more heat in a boosted application.
The VTM intake valves are 1 piece, made from 21-4N Stainless Steel.
refresh951 is offline  
Old 06-11-2012, 07:46 PM
  #52  
67King
Super User
 
67King's Avatar
 
Join Date: Apr 2009
Location: Knoxville, TN
Posts: 3,641
Default

Originally Posted by refresh951 View Post
The VTM intake valves are 1 piece, made from 21-4N Stainless Steel.
Good stuff!
67King is offline  
Old 06-11-2012, 09:14 PM
  #53  
alxdgr8
Addict
Rennlist Member
 
alxdgr8's Avatar
 
Join Date: Sep 2006
Location: Seattle, WA
Posts: 3,614
Default

Originally Posted by robstah View Post
Great link. I especially like his Helmholtz resonator research. Thanks!

Is the BMW engine you linked a stroked/bored M52, or is it a M54? It's hard to tell from the pictures. Supercharged, I take it.
+1, good reads. I did a Helmholtz/perforated absorber project in college. Always fun to mix my job in acoustics with my hobby of cars.
alxdgr8 is offline  
Old 06-11-2012, 09:42 PM
  #54  
67King
Super User
 
67King's Avatar
 
Join Date: Apr 2009
Location: Knoxville, TN
Posts: 3,641
Default

Originally Posted by robstah View Post
Is the BMW engine you linked a stroked/bored M52, or is it a M54? It's hard to tell from the pictures. Supercharged, I take it.
Naturally aspirated, stock bore and stroke 3.0L from a 99 328. This car:

67King is offline  
Old 06-11-2012, 10:32 PM
  #55  
V2Rocket
Rainman
Rennlist Member
 
V2Rocket's Avatar
 
Join Date: Jan 2007
Location: Rancho Cucamonga, CA
Posts: 42,690
Default

How much material did you remove?
V2Rocket is offline  
Old 06-11-2012, 10:48 PM
  #56  
refresh951
Moderator
Rennlist Member
Thread Starter
 
refresh951's Avatar
 
Join Date: Jun 2010
Location: Marietta, Georgia
Posts: 3,331
Default

Finished cleaning up the exhaust ports. Three of the liners were off about 0.030"-.040" as show in the "before" picture below. Also cleaned things up a bit at the header interface.

refresh951 is offline  
Old 06-11-2012, 11:02 PM
  #57  
refresh951
Moderator
Rennlist Member
Thread Starter
 
refresh951's Avatar
 
Join Date: Jun 2010
Location: Marietta, Georgia
Posts: 3,331
Default

Originally Posted by V2Rocket_aka944 View Post
How much material did you remove?
The intake: I removed casting lines, defects, machining marks and smoothed the surface, generally without changing the geometry of the ports. I also port matched the intake manifold. The new seats go in tomorrow and the plan is to look at the intake ports again after for final blending.

The exhaust: I cleaned up misaligned liners as shown above and cleaned up a bit of casting defects around the inside of the header interface.

The plan is the remove about 1mm from the combustion chamber wall to un-shroud the intake using a mill.**

**NOTE: I am able to un-shroud the intake in this way as my cylinder bore is just over 102 mm.
refresh951 is offline  
Old 06-11-2012, 11:53 PM
  #58  
refresh951
Moderator
Rennlist Member
Thread Starter
 
refresh951's Avatar
 
Join Date: Jun 2010
Location: Marietta, Georgia
Posts: 3,331
Default

Deleted: Reported spammer
refresh951 is offline  
Old 06-12-2012, 12:31 AM
  #59  
blown 944
Super User
 
blown 944's Avatar
 
Join Date: Jul 2007
Location: Firestone, Colorado
Posts: 4,826
Default

looks like you're getting there
blown 944 is offline  
Old 06-12-2012, 12:40 AM
  #60  
refresh951
Moderator
Rennlist Member
Thread Starter
 
refresh951's Avatar
 
Join Date: Jun 2010
Location: Marietta, Georgia
Posts: 3,331
Default

Originally Posted by blown 944 View Post
looks like you're getting there
Yep, and with only one arm too. LOL

Thanks Sid.
refresh951 is offline  

Thread Tools
Search this Thread
Quick Reply: High Flow, Low Cost, 8V Cylinder Head Project


Contact Us - About Us - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: