What exactly is a 3-angle valve job?
10-17-2005, 10:38 AM
#1
Luxury = Love
Thread Starter
Join Date: Jul 2005
Location: Fairfax, VA
Posts: 4,544
Likes: 0
Received 0 Likes
on
0 Posts
What exactly is a 3-angle valve job?
Ive heard it used time and time again. but what is it exaclty, why do i need it and what does it do for my car?
thanks
thanks
10-17-2005, 10:56 AM
#2
The Pro to call.
Join Date: Jul 2003
Location: under cars.
Posts: 6,172
Likes: 0
Received 0 Likes
on
0 Posts
Re: What exactly is a 3-angle valve job?
three angles on the seat instead of the standard 1. better flow of air of course, due to the smoother air transition.
not gonna do much on a street car, unless other things are done to improve airflow also.
not gonna do much on a street car, unless other things are done to improve airflow also.
10-17-2005, 11:09 AM
#3
Luxury = Love
Thread Starter
Join Date: Jul 2005
Location: Fairfax, VA
Posts: 4,544
Likes: 0
Received 0 Likes
on
0 Posts
Re: What exactly is a 3-angle valve job?
it was included wiht my new head, i was jsut w ondering wht it was gonna do for me
10-17-2005, 01:01 PM
#4
Registered Member
Join Date: Aug 2005
Posts: 193
Likes: 0
Received 0 Likes
on
0 Posts
Re: What exactly is a 3-angle valve job?
generally they're gonna need to do a valve job anyway to make sure that each individual valve sits right in its own little port... and since they're doing it anyway, mi'se well do 3 angles.
10-17-2005, 01:27 PM
#5
The Pro to call.
Join Date: Jul 2003
Location: under cars.
Posts: 6,172
Likes: 0
Received 0 Likes
on
0 Posts
Re: What exactly is a 3-angle valve job?
Originally Posted by steronz
generally they're gonna need to do a valve job anyway to make sure that each individual valve sits right in its own little port... and since they're doing it anyway, mi'se well do 3 angles.
its not quite that simple....but yes, most heads do benefit from it. a five angle is a BITCH to do, but a three angle one isnt too bad. adds a decent amount more time though.
10-17-2005, 01:36 PM
#6
Yup, jolly poopbuggy
Join Date: Nov 2002
Location: Hampton, VA
Posts: 15,599
Likes: 0
Received 0 Likes
on
0 Posts
Re: What exactly is a 3-angle valve job?
I know three angle was the standard vavle job we did when I worked at a machine shop.
10-17-2005, 02:19 PM
#7
Banned
Join Date: Aug 2005
Location: Chesapeake, V-izzle
Posts: 173
Likes: 0
Received 0 Likes
on
0 Posts
Re: What exactly is a 3-angle valve job?
you learn new stuff everyday. anyone attending TCC for auto mechanics?
10-17-2005, 03:28 PM
#8
Administrator
Join Date: Nov 2002
Location: أنا لست إرهابيا
Posts: 10,636
Likes: 0
Received 0 Likes
on
0 Posts
Re: What exactly is a 3-angle valve job?
Maybe this picture will help describe it some? The top angle is 30, the blue angle is 45 and the bottom is 60.
__________________
Got a 1995-1996 240SX? Want a new front bumper?
Check this out. Posting on drag first to try and avoid shipping it.
Got a 1995-1996 240SX? Want a new front bumper?
Check this out. Posting on drag first to try and avoid shipping it.
10-17-2005, 03:34 PM
#9
The Pro to call.
Join Date: Jul 2003
Location: under cars.
Posts: 6,172
Likes: 0
Received 0 Likes
on
0 Posts
Re: What exactly is a 3-angle valve job?
Originally Posted by greygti
I know three angle was the standard vavle job we did when I worked at a machine shop.
what kind of head? was this a performance shop?
10-17-2005, 04:49 PM
#10
brake/steer/throttle
Join Date: Nov 2002
Location: sod off you bloody wanker
Posts: 1,542
Likes: 0
Received 0 Likes
on
0 Posts
Re: What exactly is a 3-angle valve job?
i know with 5 angles, on the dyno there is a slight, but noticeable difference found in the lower end. three angles is pretty standard unless you decide to lap the valves 'in' instead. the 3 angles helps to recondition the seats before hand lapping. just makes for good sealing and if there are pits in the valve seats, they will be removed or is a 'nice' discovery in order to do something about it while the head is off.
