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On the flipside my 99 996 has zero overrevs and only 200 redlines. I never redline it, take it to 6500 max, guy before me never drove it and he knew the previous buyer, a very elderly gentleman that bought the car when he was already getting up in years. Mine's still a baby, or at least that's how my mechanic described it to me.
My non-turbo 996 that I purchased new has no overrevs, whatsoever.
As a former tech (I worked at Porsche as well as many other companies) and someone who Turbo charged Watercooled VWs back in the 80's, all I can say is HELL YES!
Many people have no idea who we dreamed about this tech that is now on daily drivers, in much the same way people have no idea how futuristic those flip phones looked on Star Trek back in the day and now everyone has what is basically a super computer in their hands.
When variable valve timing became a thing in production cars in the late 80s / early-mid 90s it was amazing to feel it during the RPM band. It felt like a turbo coming on in some cars.
Fascinating stuff.
Anybody hear remember what a mechanically injected early 70's Porsche sounded like? That was pure heaven.
Yes, true, a lot of people just don't know what they don't know.
Nowadays a lot of high Tech is outlawed in a lot of Racing Organizations , not so in production cars. In some ways production engines are more high tech than racing engines, just not utilizing to the same potential/goals.
Vario-Cam for instance on the 996TT is a rather crude on-off version that switches from 0 degrees to 30 degrees at 1500 rpm. With a simple re calibration to switch back to 0 degrees at 4200 rpm can gain 120hp from 4200-6000 RPM with same boost, no other changes...
I've heard you can achieve the same result by simply unplugging Variocam on TT; @powderhound was experimenting with this method for a while, but I believe the additional HP became untenable at lower speeds on track
Originally Posted by Porschetech3
Yes, true, a lot of people just don't know what they don't know.
Nowadays a lot of high Tech is outlawed in a lot of Racing Organizations , not so in production cars. In some ways production engines are more high tech than racing engines, just not utilizing to the same potential/goals.
Vario-Cam for instance on the 996TT is a rather crude on-off version that switches from 0 degrees to 30 degrees at 1500 rpm. With a simple re calibration to switch back to 0 degrees at 4200 rpm can gain 120hp from 4200-6000 RPM with same boost, no other changes...
Some people are spending a lot of time advising the rest of us to “invest” in a 1999-2004 Porsche 911, internally known as the 996 and given the nickname "fried egg" for the shape of its Boxster-sourced headlights.
I've heard you can achieve the same result by simply unplugging Variocam on TT; @powderhound was experimenting with this method for a while, but I believe the additional HP became untenable at lower speeds on track
Not so simple, by unplugging the Vario-cam, it remains at 0 degrees all the time and looses 150hp at 3000-3500 rpm.
The 996TT only has 30 degree of on/off control, some of the more sophisticated VVT's has 65 degrees of continuously variable control. And the "cam-less" FreeValve type designs have infinite control of degrees and also of the valve lift.
Vario-Cam for instance on the 996TT is a rather crude on-off version that switches from 0 degrees to 30 degrees at 1500 rpm. With a simple re calibration to switch back to 0 degrees at 4200 rpm can gain 120hp from 4200-6000 RPM with same boost, no other changes...
This generation of variocam also is intake only. The variocam used on VW's 3.2 and 3.6L VR6's in the same timeframe had infinitely variable intake from 0-30 degrees and on/off exhaust at either 0 or 30 degrees. The 996TT variocam is quite similar to bmw's vanos as implemented on the E36 M3 and very different from the vane cell actuator used on the VR6 intake camshaft.
@powderhound found over 100HP by unplugging Variocam, it was higher rev range yes. I like the idea because one doesn't necessarily need a ton of HP low-range, and I like the idea of unplugging something that is inherently complex and potentially failure prone
Originally Posted by Porschetech3
Not so simple, by unplugging the Vario-cam, it remains at 0 degrees all the time and looses 150hp at 3000-3500 rpm.
The 996TT only has 30 degree of on/off control, some of the more sophisticated VVT's has 65 degrees of continuously variable control. And the "cam-less" FreeValve type designs have infinite control of degrees and also of the valve lift.
@FirstFlatSix interviewed him about it; R&T is still sticking tightly to their insistence that Type 996 will "never"be collectible, but have tempered that original opinion with the concession that certain isolated, extremely limited production, examples might be eventually. Of course the 996 price recovery begun over the past five years was explained away by them with "Covid 19 temporary panic economy"
You'll have to explain to me how "supply chain delays" and "chip shortages" could possibly triple the value of 175,000 Classic 911's that were manufactured almost a full quarter-century ago
A $60K 2022 Ford F150? Yeah I can see global economic uncertainty pushing those values somewhat up
A $300K 2002 996 GT2?? come on, that was gonna happen anyway
Originally Posted by GoGoDoDo
Maybe we should ask Jack if he feels differently today. It was 2017 and all. :-)
@Porschetech3 in your opinion will unplugging Variocam on TT produce misfires, or any other long-term reliability issues? Powerhound never answers that question
Obviously you are not 'mechanically inclined". Unplugging the Vario-cam disables the function,and only prevents a "failure to function" event,( because it is already failed/dissabled). The mechanical complexity and inherent mechanical design that can fail are still there..
Developing the systems to be reliable enough to use in production cars is why it took decades, and yes the risk is worth it if performance and hp/ per liter is what you are after.
And of course the more control you have over the valve action, the more power can be made ( or tailored )
Originally Posted by bdronsick
@powderhound found over 100HP by unplugging Variocam, it was higher rev range yes. I like the idea because one doesn't necessarily need a ton of HP low-range, and I like the idea of unplugging something that is inherently complex and potentially failure prone
But the solenoids will no longer cycle (wear out), correct?
OR should I say the $800+, most expensive solenoids ever made, in the history of the world, and most time consuming to replace (MKI at least)...
Originally Posted by Porschetech3
Obviously you are not 'mechanically inclined". Unplugging the Vario-cam disables the function,and only prevents a "failure to function" event,( because it is already failed/dissabled). The mechanical complexity and inherent mechanical design that can fail are still there..
Developing the systems to be reliable enough to use in production cars is why it took decades, and yes the risk is worth it if performance and hp/ per liter is what you are after.
And of course the more control you have over the valve action, the more power can be made ( or tailored )
01-28-2022 | 02:54 PM
