rosenbergendo

"Then there’s the engine, that went to what Porsche calls a “rigid valve drive” with a solid lifter camshaft to eliminate the extra weight of a hydraulic system. It’s a preview of what goes into the next GT-series road cars, like the 911 GT3. Its exhaust, which is routed through that meaty diffuser, has separate pipes now, changing the sound."
What does this even mean?

http://blackflag.jalopnik.com/our-fi...the-1791752540

RealityGT

In for the chaos..

Just in time

Dropped several questions in Daytona to the powers that be about the new GT3 engine size. Could not get an answer but the body language makes me wonder whether will be a 4.0L. Was reassured, though, that reliability issues have been ironed out.

Guest89

Stef has negative credibility. Ignore.

CDinSing

Sounds like the same answer Dundon is pursuing for our engines, a solid lifter valve train. Except the RSR doesn't have variocam (hence the rigid comment) because the engine doesn't need low end torque.

bronson7

Any discussion on current 3.8 engine?

Chris3963

I am no technician but I thought that it was not possible to have a solid lifter combined with variocam??. The current 4.0l doesn't have it so i think it is unlikely that the .2 GT3 will have it.

GrantG

I think the hydraulic lifters are self adjusting - I think losing those implies the need to adjust valve clearances periodically (like 964 and earlier 911's, except instead of 12 valves there are now twice as many)...

CDinSing

The two are not mutually exclusive. Still I think you are correct we won't see solid lifters in a road going GT car because 1) it would mean periodic manual valve adjustments, which are fine for a race engine not too acceptable for Porsche to sell to owners for a modern road car and 2) it would mean certifying a new engine for EPA, versus reusing the RS engine. Certification cost would be high for a limited volume engine especially for cash strapped VW. So let's hope the latest design changes really have fixed the dependability issues.

Macca

Solid lifters is a red herring in the production 4.0L Im fairly certain (no cleaning lady needed). We would be back to lash adjustment (heads off) every 20K miles or sooner.

GrantG

I think you just pull the valve covers, not the heads (at least on the air-cooled cars). I got to be pretty good at it and could do it in about 90 minutes, but there is less space to work on the new cars.

I agree this is almost certainly not happening...

Just in time

Very tight lipped. I asked why I should buy another GT3 given engine issues. Answer: need not worry.

Macca

Oops. Sorry Grant. Im meant the cam covers not the cam towers/heads LOL! Much easier to do in an uncluttered old skool aircooled car but it would lake more than 90 minutes just to get the rear bumper and associated plumbing and pipe work of the MA175 and Im still unsure you could do it without dropping the engine.

Jimmy-D

I guess it is reassuring they figured it out a couple years later

bronson7

Need not worry about the .2 gt3 engine and hopefully need not worry about the .1 engine (meaning they'll take care of us after warranty).