Titanium Wrist Pin

[butre]

MBR, can you please explain how you think titanium, which is stronger than steel, will wear out faster than a standard steel wrist pin?
No one has complained of such a miraculous event.

If it still vibrates too much then you can buy a Jaguar CDI and if its still too much then take the crank out and drill bigger balance holes in it. Click on my signature link to read about it.

strength isn't a factor determining wear in metal. Hardness is the one you're looking for.

the titanium wrist pin ended up being the cause of my engine's failure.

 

[Fabian]

the steel wrist pins are very hard and do not wear out.

That has been my experience with these engines as well as general automotive engines.
I put preference on reliability over any marginal vibration reduction, and that's a debatable subject, considering a single cylinder engine cannot be balanced. It is by nature an inherently unbalanced design, unless equipped with balance shafts.

When Jaguar designs a dual balance shaft system for these engines, then, and only then will i agree with him that the Chinese 2-stroke engine can be balanced by clicking on his """signature link""".

 

[Fabian]

Additional information on engine balance and vibration.

 

[Deleted member 12676]

this place can make a quality wrist pin from titanium but at the high price of $150:
http://www.paeco.com/Titanium Products.htm
Best to try the Jaguar CDI and then balance the crank if that doesn't suit you enough.

 

[abikerider]

MBR, can you please explain how you think titanium, which is stronger than steel, will wear out faster than a standard steel wrist pin?
No one has complained of such a miraculous event.

If it still vibrates too much then you can buy a Jaguar CDI and if its still too much then take the crank out and drill bigger balance holes in it. Click on my signature link to read about it.

I'm not sure where you are getting your info from but titanium is weaker but lighter than steel. It's kinda in between steel and aluminum in weight and strength. I would definitely think it would wear more quickly than steel.

 

[Fabian]

There seems to be conflicting information and physical evidence about the strength of titanium and it's wear properties, considering the site which is listed by Jaguar, saying this: The following new items, made from titanium, were introduced by PAECO in 1999. Titanium is a unique metal that is approximately twice as strong as steel, but only one half the weight.

If that is the case, then how can something twice as strong as steel, be weaker than steel in wear properties, as evidence shows in MBR's photos.

 

[Rockjaw]

Only one way to find out..ill be the doner ...ill try the wrist pin and if it blows the motor..i have tons of engine kits And I think I may be getting all of this vibration on my chopper because of the stem piece welded mount ..i may cut the stem off and try these mounts shown in this pic.

 

[butre]

I've already found out, it's not something you should be trying. fix your mounts and your engine will stop vibrating

 

[Deleted member 12676]

butre, two questions:
1) how many miles before the engine started making noises due to wear on the titanium wrist pin?
2) were you using a high compression head and if so which one and do you know the cranking pressure?

I have emailed Trick Titanium for a cost on a wrist pin. This is from their web site:
"Trick Titanium wrist pins with the DLC coating offer up to a 40% weight reduction over stock steel pins. We use Ti 17 exclusively in our wrist pin applications for its proven performance and increased durability over Ti 6-4. We have made an exhaustive effort to find the right blend of material and coating technologies to meet your needs. DLC is a carbon-silicon-diamond like coating that offers outstanding wear characteristics and hardness. It is the real deal!"
So we can deduce that the type of titanium is important as well as the wear resistant coating.

This site has a coating to use on wrist pins: www.carbonraptor.com/pdfs/Wrist_Pin.pdf

 

[butre]

butre, two questions:
1) how many miles before the engine started making noises due to wear on the titanium wrist pin?
2) were you using a high compression head and if so which one and do you know the cranking pressure?

I have emailed Trick Titanium for a cost on a wrist pin. This is from their web site:
"Trick Titanium wrist pins with the DLC coating offer up to a 40% weight reduction over stock steel pins. We use Ti 17 exclusively in our wrist pin applications for its proven performance and increased durability over Ti 6-4. We have made an exhaustive effort to find the right blend of material and coating technologies to meet your needs. DLC is a carbon-silicon-diamond like coating that offers outstanding wear characteristics and hardness. It is the real deal!"
So we can deduce that the type of titanium is important as well as the wear resistant coating.

This site has a coating to use on wrist pins: www.carbonraptor.com/pdfs/Wrist_Pin.pdf

that wrist pin had 400 miles on it before it started making noises. I never tested cranking pressure but compression ratio was 10:1