What can we do with the 2/3uz-fe cams?

[cowboy bebop]

Hi guys,

Since there are no upgrades (that I have read about) for the 2/3uz-fe cams, would there be any downside to having the cams reground to more agressive specs? I've heard good and bad things about regrinding, but would like to hear everyones opinions.

Also, in a related question. At what lift does the 1/2/3uz-fe become an interference motor?

Eric

 

[Zuffen]

It's not simply regrinding the cams.

They need to be welded (MIG) to build up the lobe to allow it to be machined to the profile required.

Whilst we all hear they only last 50/60,000K's there are also reports of them looking like new at 70,000k's

 

[cowboy bebop]

Well, yeah, I mean I got that far. I suppose right now that there's no other choice when it comes to the camse for the 2/3uz-fe.

Again, a question... At what lift does the 1/2/3uz-fe become an interference motor?

Thanks again,

Eric

 

[turboandrew]

Interference may depend a lot on what compression you will go with. I think the stock 3UZ motors are already interference, but again, change pistons for day 8.5:1 and I bet it would not be a big issue, or least not limit you any more than say the 2JZGTE's maximum lift.

 

[cowboy bebop]

Hmmmm...I know the with the 2jz-gte, the max lift without becoming an interference motor is 10mm. I'm looking for a very aggressive cam set-up with any 2uz-fe that would go in the Supra, much like with the 2jz-gte that's there now. Here's the cam sheets.





You can see that the duration is very short compared the amount of lift compared to something like HKS cams. I'd like to duplicate this in a quad cam set-up with a 2uz-fe.

Eric

 

[turboandrew]

I assume you will flow the head at various lifts to find the point where more lift does not do any good. I think that would be a good starting place, then worry about the interference issue if there is one.

 

[SCV8]

That Crane profile looks like what I'd go with if I were to do that.