Larry Cable

No, and yet yes, consider the following:

- the mule has no characteristic GT ram air structure on the rear decklid merely slats found on other 911 variants

- therefore, how is air inducted to the engine:
1) forced induction via turbocharging
2) natural aspiration:
a) drawing air into the engine compartment thru the decklid slats
(which has no associated ram effect seen on other GT variants to date)

b) air ducted from the side (turbo S) flank intakes on either side of the
car, behind the doors, in front of the rear wheels, with some ram effect
from the location of the intakes drawing air flowing over the flanks of the
car

IF, the engine is turbocharged it requires intercooling, this has been engineered in two ways for the history of 911 Turbos:

930-993: a single large intercooler situated above the engine, vented through the engine decklid

996-992: dual intercoolers, situated one on either side of the engine, one per turbo, per bank of 3 cyls, mounted low down to reduce ctr of gravity, and vented through slats in the rear bumper cover (a design pioneered by RUF I believe)

There are no characteristic 996- style intercooler vents on the rear bumper of the mule, therefore its likely its N.A or Porsche has returned to the 930-993 style of single large intercooler design, highly improbable for a variety of reasons, hence I assert its N.A drawing air from the side ducts.

neanicu

I've said it before,I vote for(or would be nice to have) air being introduced thru the side inlets with individual throttle bodies for each cylinder.

Larry Cable

I'm guessing your former wish is granted, less certain about the latter, for reasons of cost and relative resulting improvement of engine perf

neanicu

The individual throttle body set up is very interesting IMO. I have it on my E46 M3. I believe with today's electronics you can achieve more power and better fuel consumption in a high revving NA engine.
Another interesting design I'm dying to see soon on production vehicles is the electronically controlled valves.

Larry Cable

it would be a real change for 911 production engines

neanicu

Yes. Maybe it's time for some changes...

I believe there are or will be better solutions in the future rather than going full blown turbocharged. I think turbocharging is the cheapest readily available solution to escape regulations. Maybe it's time for engineers to go back to the drawing board and use their collective minds for a better solution when it comes to enthusiast cars.
Personally,I'll take a hybrid combined with NA engine any day over a turbo.

Larry Cable

heretic!

GrantG

That's the way they always used to be for the first 10 years of production (starting with the 6 carb intakes in 1964 and ending with the Mechanical Fuel Injection cars in 1973).

Larry Cable

totally understand that, I think the throttle bodies per cylinder went away about the same time as MFI came in - doh like you said!

GrantG

Nope, MFI always used 6 throttle bodies with velocity stacks (first made from Magnesium like above and then changed to black plastic). MFI was the system from 1969 to 1973 (still my favorite for intake sound, power delivery, throttle response and the ability to adjust for temperatature and atmospeheric conditions like altitude - it was an analog computer and rock-solid reliable).

CIS injection was the one with just one throttle and it sucked compared to what came before (necessary for emissions and economy).

Larry Cable

cool - learned something new today!

neanicu

Thanks for your input GrantG,always valuable!


What do you think about individual throttle bodies with today's technology in a high revving 4.0L NA engine?

GrantG

It would be absolutely Epic! They've continued to use it on all the GT3 RSR's and it kicks ***!

neanicu

That's what I thought!

Porsche! Are you listening?!

Larry Cable

then it could be a feature on the RS seeing as it appears may be re-using some of of the RSRs intake technology.