Having gotten round to balancing some forged pistons I have, I found that having removed the wrist pins I could get down to beneath the 550g limit of my 0.1g scales (actually weigh about 440g), which got me wondering. I weighed the wrist pins and each one came in weighing exactly the same to a tenth of a gramm. (135.2g I think) and I was thinking that since this is approximatly 25% 0f the Piston + wrist pin mass, and is basically just a thick tube (thus cheaper to manufacture than say Pistons), titanium would be a viable alternative reducing mass, and maintaining the strength for this part.
Any engine known to use Ti wrist pins? Any reasons why this is not viable?
Just a thought!
Titanium Wrist pins
- Bill K.
- Posts: 563
- Joined: Mon Oct 27, 2003 10:50 pm
I have used Tipins on several occasions.. The fact is they are very hard on wrist pin bushings and wipe them out fast if used conventionally.
I have had excellent results from DLC coating the pins to reduce the friction between the pin/bushing. This only cost about 35 bucks per pin and after it's applied the wear issues go away.
I have went as far as doing this with NO BUSHING in the rod, just a DLC coated pin into a steel small end.
BTW- This is Jake- logged in as Bill!
I have had excellent results from DLC coating the pins to reduce the friction between the pin/bushing. This only cost about 35 bucks per pin and after it's applied the wear issues go away.
I have went as far as doing this with NO BUSHING in the rod, just a DLC coated pin into a steel small end.
BTW- This is Jake- logged in as Bill!
- Piledriver
- Moderator
- Posts: 22520
- Joined: Sat Feb 16, 2002 12:01 am
I have read tool steel pins (which can still weigh 50% less than std) are not recommended on the street.
Anyone know why?
Jake, get some sleep.
Anyone know why?
Jake, get some sleep.
Addendum to Newtons first law:
zero vehicles on jackstands, square gets a fresh 090 and 1911, cabby gets a blower.
EZ3.6 Vanagon after that.(mounted, needs everything finished) then Creamsicle.
zero vehicles on jackstands, square gets a fresh 090 and 1911, cabby gets a blower.
EZ3.6 Vanagon after that.(mounted, needs everything finished) then Creamsicle.
-
- Posts: 7087
- Joined: Sat Oct 13, 2001 1:01 am
-
- Posts: 299
- Joined: Sat Jul 09, 2005 6:55 pm