Wind911

No idea, I just noticed it this morning when reading about the yellow manual car.

GrantG

The 911R has an electronic limiter at 8,500 rpm (even though the redline on tach is higher). GT3 Manual will be able to hit 9,000 (just don't yet know if Sport has to be pressed or not to get there)

mass27

Thank you for the details above. On the configurator, it is very hard to tell that when the Vent Frames are painted, that the slats become leather. Probably because they are black plastic to begin with.

Similar to painting the Vent Frames, can the Vent Slats be painted in a deviated color. For example, if you didn't want the standard aluminum color or the painted exterior color, you could get black so it blends. Anyone do this? CXX option?

STG

Just so you know, the CXX and PTS authority has a stickie here:

https://rennlist.com/forums/991/7085...e-and-you.html

A vent slat thread? Who knew. Cool! Thanks Mass27 for digging that up.

https://rennlist.com/forums/991-gt3-...r-slats-2.html

Very good info and a great resource. The guru sometimes comes out and answers questions.

I hear he lives somewhere in a cave high in the AZ mountains surrounding PHX.

Sean in Texas

A note re: buckets- good idea to sit in them before you order and subsequently find out you don't fit.

That is all.

ChicagoM4

Question for engineers or someone smarter than me at cars...

The bore (81.5mm) and stroke (102mm) for both the 991 GT3RS and 991.2 GT3 are the exactly the same; however, the compression ratio for the RS is 12.9 while the 991.2 GT3 is 13.3.

How can power be rated the same between the two cars if the GT3 has a longer stroke? What else is at play? Sorry if dumb question.

GrantG

The shape of the pistons controls that (taller dome gives more compression). Length of the conrods also affects that...

BTW, you have bore and stroke swapped. 911's have very short stroke relative to bore...

Since the 991.2 GT3 has same displacement and higher compression than RS (and less internal friction from solid valve lifters), I would expect it to have at least 10 to 15hp more power (and more torque) than RS at rest on the dyno, where the power is rated. RS probably gets a bit more ram-air effect from side intakes, but this is not part of the 500hp rating.

I think the GT3 has identical power and torque numbers as 911R and RS, to avoid political issues associated with the new motor bypassing those models.

ChicagoM4

woops, sorry, i got the labels mixed duh.

Given the end result is more compression, though, does that not result in an increase in power? Regardless of whether it's due to the dome or not?

mass27

+1

Flame suit on:

1. Make sure they are wife approved.
2. No heated seats on buckets. Yes, I know, who the hell needs heated seats. See point #1.
3. Bucket seats are very comfortable once you are actually seated (assuming you have the body type/size that fits in a bucket seat). Anyone who says getting in and out of them is easy, is not being honest or accurate. So, if you plan on going to the dry cleaner or grocery store or ANYTHING other than the track which requires multiple ingress and egress, do not get bucket seats. Once again, who the hell cares about comfort and errands. See point #1

Flame away.

GrantG

Yep, I edited my post above to add that info too...

sunnyr

In the other Porsche with a "dashed" red before a solid red - the 16 GT3 RS, the redline varies with the gear -





In that car apparently, the redlines are -
1st 2nd: 8800
3rd: 8600
4th+: ~8400

https://rennlist.com/forums/991-gt3-...l#post13376567

So probably means something similar for the .2 manual - 9000 in 1st and 2nd and somewhere in between 9k and 8.5k for the rest of the gears?

GrantG

Not necessarily. The new valvetrain and better oiling may have convinced the engineers that reliability no longer depends on that sort of thing...

ChicagoM4

Thanks! I wonder the differences in ram air effect between the RS and the new GT3 or even how that can be measured accurately

GrantG

It could be measured (or calculated) by knowing the absolute air pressure in the intake plenum at high road speeds (I think the engine's ECU is sent this info from sensors to adjust the fuel mixture, so it would be known).

STG

Definitely not a "one size fits all" option literally. I agree.

I like, but there are a lot of different situations every buyer is in and can understand they're not for everyone.

Now, the no-wingers that's another story