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924/931/944/951/968 Forum Porsche 924, 924S, 931, 944, 944S, 944S2, 951, and 968 discussion, how-to guides, and technical help. (1976-1995)
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Anyone interested in a 944S2,968 turbo system?

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Old 08-07-2008, 11:27 AM
  #31  
harrisonrick
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Not that I am speaking for every NA owner here...but that's pretty darned expensive. It'd be smarter to buy a good 951 with mods for that kind of $.

My .02.
Old 08-07-2008, 11:53 AM
  #32  
Jfrahm
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Originally Posted by harrisonrick
Not that I am speaking for every NA owner here...but that's pretty darned expensive. It'd be smarter to buy a good 951 with mods for that kind of $.

My .02.
Sure, if that's what you want. I've had two 951's myself and with the 2.5 I just don't care for the lack of low-end torque. Plus I also like the cabrios and the 968 body, and in the USA you can't just buy a Turbo Cab or a 968 turbo.

You may have also overlooked the fact that this is not a kit for the 944NA but rather for the S2 or 968.

-Joel.
Old 08-07-2008, 12:42 PM
  #33  
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true. still expensive though.
Old 08-07-2008, 01:43 PM
  #34  
JohanvdWalt
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Originally Posted by harrisonrick
true. still expensive though.
Power is expensive.

Compare the price of a 318i with that of a 335i, apart for the power they are mostly the same car!

Same goes for a C180 vs a C63/65 what ever its called - you get the idea.
Old 08-07-2008, 02:25 PM
  #35  
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I guess you could say same goes for 944 to 944S...or any car. Good point. maybe I'm a cheap SOB then.



I'm not that sharp when it comes to a turbo system, but are all turbos intercooled? I had a Dodge 600 turbo when I was in highschool (yes, I was a geek) was it intercooled too?

Can a turbo run without an intercooler?
Old 08-07-2008, 03:43 PM
  #36  
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plus look at the price of a turbo kit for bmw or other highend car...for quality parts on a not so common car and considering the kit components i think its a high but reasonable price.
Old 08-07-2008, 04:17 PM
  #37  
JohanvdWalt
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Originally Posted by harrisonrick
I guess you could say same goes for 944 to 944S...or any car. Good point. maybe I'm a cheap SOB then.



I'm not that sharp when it comes to a turbo system, but are all turbos intercooled? I had a Dodge 600 turbo when I was in highschool (yes, I was a geek) was it intercooled too?

Can a turbo run without an inter-cooler?
Yes it can, but because of the heat you will not be able to boost as high due to detonation, so it will make a lot less power.
There are quite a few Diesel pick-ups on the market without inter-coolers on which aftermarket coolers are fitted with around 20% increase in power.

Johan
Old 08-07-2008, 08:53 PM
  #38  
white924s
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Originally Posted by harrisonrick
I guess you could say same goes for 944 to 944S...or any car. Good point. maybe I'm a cheap SOB then.



I'm not that sharp when it comes to a turbo system, but are all turbos intercooled? I had a Dodge 600 turbo when I was in highschool (yes, I was a geek) was it intercooled too?

Can a turbo run without an intercooler?
most ceainly can - I've built racecar engines with small Garrett turbos and no intercoolers...

of course, those engines were based off of Yamaha R6 engines (12.8:1 comp ratio), and were designed to spool as quickly as possible (getting low end torque out of a restrictor-plated 600cc inline 4 is a bit of a trick hah). The engine ran on ethanol, which helps cool things down too, and I determined that, for the boost we were running, the pressure drop and flow restriction from adding an intercooler outweighed the benefits of being abel to turn the boost **** up higher.

If you're using a different engine and have different goals (eg peak hp vs. width of torque peak), YMMV
Old 08-08-2008, 12:07 AM
  #39  
Rich Sandor
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There's PLENTY of room in an S2 or 968 for an intercooler if you replace the gigantic airbox with a cone filter. That would certainly be a no-brainer for me, if I were to turbo my 968.
Old 08-08-2008, 02:39 AM
  #40  
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Tim, any reason this wouldn't work on an S?
Old 08-09-2008, 02:14 AM
  #41  
white924s
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Originally Posted by Rich Sandor
There's PLENTY of room in an S2 or 968 for an intercooler if you replace the gigantic airbox with a cone filter. That would certainly be a no-brainer for me, if I were to turbo my 968.
While I don't have an S2 or 968, if I were to turbo my car, I actually probably wouldn't intercool it. Reason being that I wouldn't do anyhting other than a low boost system (max boost 5-6 psi). I would do this so I could size a turbo for a broad powerband and avoid putting too much excess strain on the drivetrain. The airbox would probably go though and I would mount the turbo on the pass. side like Callaway did
Old 08-09-2008, 03:21 AM
  #42  
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Originally Posted by jstand22
Tim, any reason this wouldn't work on an S?
also curious about this.

Is there any way a low boost 6-7psi system could be developed or put together. Maybe using 951 parts and such. What would be needed to bolt the 951 turbo to the S manifold? Could it run off the s DME or would it need the turbo DME?



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