986 Forum - The Community for Porsche Boxster & Cayman Owners - View Single Post - Has anyone tried sport throttle bodies for the boxster any year ?

markk · 01-28-2006, 01:53 AM

> Are the 8.3 liter Vipers supposed to have 830hp,but instead have 500hp?

Viper engine are not sportengines tuned for maximum power output either. They added cubic inches to get power AND torgue at the lower end of the rev scale.

With the proper money and engineering knowledge yes, a Viper engine would get to 830bhp, easily.

Look at Porsche GT3 and CGT engines, BMW ///M engines, Lamborgini engines, Ferrari engines and even the Honda V-tec engines which are all NA and put out more than 100bhp per liter. Those are, IMHO, sportscar engines which are really optimized and engineered near the limits with its design maximized within the parameters of being still a street/production car. Not at limit yet because they are still mass engines for street cars, but pretty much near the limit.

A Boxster engine is nowhere near its limits...

> Boxster is not a simple car where you can just add this and that because it will offset the balance easily.

I agree. Boxster is a great balanced car which Porsche did perfectly. Adding things will/can offset the balance. True. But that was not the case / argument. They did not maximize the design in all aspects, especially not the engine.

> If the headers on a Boxster are so crappy then why dont more people have problems with them?

All people do have problems with them in respect that they limit power output. Just search the net for some comparison between dansk headers and the OEM stuff. You'll be amazed.

Like said with the proper intake modifications, exhaust modifications and remapping the 3.2 S engine originally producing 252bhp can be put to about 280/290 bhp. Search the net, there are several around. Yes the cost for the work/parts is high related to the gain, I know. But these still are, from a non-cost but engineering view, simple modifications. There will be more to gain with more drastic mods like headporting, cams, etc.

And yes, I know that putting a (tuned) 3.4/3.6 996 engine is the better option cost wise.

My apologies for the rather "hard" response. I'm just debating the phrase that these cars a maximized in design / engineering. It just not true, especially for the engine design. They are great in balance, which is very important as well...

BTW: I own a BoxsterS, BMW e30 M3, a midly tuned Subaru Impreza GT Turbo and a Peugeot 206gti, two motorcycles and without being arrogant I do know a thing or two about car/engine technology. Besides hobby car technology, among other things, was part of my education as a car driver instructor in Holland.
(*c

Mark.

01-28-2006, 01:53 AM	#7
markk Registered User Join Date: Jun 2002 Location: Holland Posts: 140	> Are the 8.3 liter Vipers supposed to have 830hp,but instead have 500hp? Viper engine are not sportengines tuned for maximum power output either. They added cubic inches to get power AND torgue at the lower end of the rev scale. With the proper money and engineering knowledge yes, a Viper engine would get to 830bhp, easily. Look at Porsche GT3 and CGT engines, BMW ///M engines, Lamborgini engines, Ferrari engines and even the Honda V-tec engines which are all NA and put out more than 100bhp per liter. Those are, IMHO, sportscar engines which are really optimized and engineered near the limits with its design maximized within the parameters of being still a street/production car. Not at limit yet because they are still mass engines for street cars, but pretty much near the limit. A Boxster engine is nowhere near its limits... > Boxster is not a simple car where you can just add this and that because it will offset the balance easily. I agree. Boxster is a great balanced car which Porsche did perfectly. Adding things will/can offset the balance. True. But that was not the case / argument. They did not maximize the design in all aspects, especially not the engine. > If the headers on a Boxster are so crappy then why dont more people have problems with them? All people do have problems with them in respect that they limit power output. Just search the net for some comparison between dansk headers and the OEM stuff. You'll be amazed. Like said with the proper intake modifications, exhaust modifications and remapping the 3.2 S engine originally producing 252bhp can be put to about 280/290 bhp. Search the net, there are several around. Yes the cost for the work/parts is high related to the gain, I know. But these still are, from a non-cost but engineering view, simple modifications. There will be more to gain with more drastic mods like headporting, cams, etc. And yes, I know that putting a (tuned) 3.4/3.6 996 engine is the better option cost wise. My apologies for the rather "hard" response. I'm just debating the phrase that these cars a maximized in design / engineering. It just not true, especially for the engine design. They are great in balance, which is very important as well... BTW: I own a BoxsterS, BMW e30 M3, a midly tuned Subaru Impreza GT Turbo and a Peugeot 206gti, two motorcycles and without being arrogant I do know a thing or two about car/engine technology. Besides hobby car technology, among other things, was part of my education as a car driver instructor in Holland. (*c Mark.