Post Reply
User avatar
jema
Silver
Silver
Posts: 28
Joined: Wed Dec 15, 2004 11:21 pm
Contact:
Contact jema

Help: Titanium valvespring retainers

Post by jema »

Hi!

I have a vague memory of someone selling titanium valvespring retainers, but I can't seem to find the post anywhere! Have I dreamt this?

Please post the link if you know what I'm looking for.

Also, if someone tried it, tell me why and what you think. Also tell me why I should not use them.

:)
/Mattias A
Top
User avatar
ar4me
Verde
Verde
Posts: 645
Joined: Fri Dec 03, 2004 9:55 am
Location: Southern California

Post by ar4me »

Here you go:
http://www.alfabb.com/bb/forums/showthread.php?t=10824
Jes
87 Milano Verde - daily driver - Juliet
87 Milano 3.0 Motronic - budget race car - Roxanne
87 Milano 3.7 24v - race car
(Repeat or do as I say at your own risk - be critical)
Top
User avatar
jema
Silver
Silver
Posts: 28
Joined: Wed Dec 15, 2004 11:21 pm
Contact:
Contact jema

Post by jema »

Thank you Mr!!
/Mattias A
Top
User avatar
Micke
Verde
Verde
Posts: 810
Joined: Sun Dec 05, 2004 11:33 pm
Location: Finland
Contact:
Contact Micke

Post by Micke »

As I've looked into this matter I could cut in (for a change)

The stock retainer is 17g. The Ti part will be about half if it has the same design. Now do not expect any miracles as the weight of the valve chain will not change a lot. In the 4-banger the intake valve is 110 g. The follower 42 g and the retainer 17. Thus a 50% weight saving in the retainer will save 5% weight which again will allow about 2.5% higher rpm.

As I'll use Ti valves, retainers and locks the scenario looks a bit different 8)

However, as they are cheap, I'd go for them too.

If anyone has a source for light followers I'm all ears.
Top
User avatar
jema
Silver
Silver
Posts: 28
Joined: Wed Dec 15, 2004 11:21 pm
Contact:
Contact jema

Post by jema »

where did you but your ti valves? Are they oversized? :D

I'm not thinking of weight in first hand, but that they will not wear down as fast...
/Mattias A
Top
User avatar
Micke
Verde
Verde
Posts: 810
Joined: Sun Dec 05, 2004 11:33 pm
Location: Finland
Contact:
Contact Micke

Post by Micke »

They are HUGE and need to machined down from >2" to 47-48 mm (for the TS).

They need bronze guides and preferably Be-Cu seats. If the seats are too hard the valves will wear down very fast.
I'll fix these issues with a diamond coating.
Top
User avatar
75evo
Verde
Verde
Posts: 944
Joined: Tue Oct 11, 2005 8:56 am

Post by 75evo »

Micke,

How much were they?
Top
User avatar
jema
Silver
Silver
Posts: 28
Joined: Wed Dec 15, 2004 11:21 pm
Contact:
Contact jema

Post by jema »

any pictures of your headjob (he he)?

If I'll take the finlandsfärja over to you, will you fix my heads aswell? ;)
/Mattias A
Top
User avatar
rz
Platinum
Platinum
Posts: 390
Joined: Mon Jan 17, 2005 2:23 pm
Location: belgium

Post by rz »

hi micke,
i thought tianium is tired after a short while?
Top
User avatar
Micke
Verde
Verde
Posts: 810
Joined: Sun Dec 05, 2004 11:33 pm
Location: Finland
Contact:
Contact Micke

Post by Micke »

Head isn't ready yet. It's not my expertice anyway so I'll have someone do it.
Your TP for money is getting valuable so maybe it will get cheaper doing something over here one of them days. BTW, we just picked up a 164Q4 and a fiberglass hood for my GTj from Sweden witht the same boat.

Ti can get tired. However, the valves are not parts with this kind of stress. Main durability concern is wear against the seat. This is a problem for the nsacar guys with 1/2 kg pushrods revving up to 8500... In my case I might have to adjust valve lash every 5 years or so.

I recall some bikes using Ti for the stock valves and the new GT3RS using Ti con rods.
Top
User avatar
jema
Silver
Silver
Posts: 28
Joined: Wed Dec 15, 2004 11:21 pm
Contact:
Contact jema

Post by jema »

I think the Ducati bikes uses both Ti valves and camshafts.... :roll:
/Mattias A
Top
Post Reply

Return to “Engine”