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Twin Turbo 951?

 
Old 11-03-2008, 01:51 AM
  #16  
MrPorsche951
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excuse me, I am 100% technical.. as always. I suggest you stop badgering me as I am allowed to be here.

A quad turbo!? Thanks Darwin for your education, appreciated as always.
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Old 11-03-2008, 01:55 AM
  #17  
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Originally Posted by MrPorsche951 View Post
excuse me, I am 100% technical.. as always. I suggest you stop badgering me as I am allowed to be here.

A quad turbo!? Thanks Darwin for your education, appreciated as always.
Sorry man... this ain't a public sidewalk. You got no unalienable rights here, and you won't be getting your phone call, either.
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Old 11-03-2008, 02:00 AM
  #18  
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Originally Posted by MrPorsche951 View Post
excuse me, I am 100% technical.. as always. I suggest you stop badgering me as I am allowed to be here.

A quad turbo!? Thanks Darwin for your education, appreciated as always.
You're turbo and engine build pics on your myspace are pretty involved looking. What all did you have done exactly?
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Old 11-03-2008, 03:18 AM
  #19  
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Originally Posted by MrPorsche951 View Post
excuse me, I am 100% technical.. as always. I suggest you stop badgering me as I am allowed to be here.

A quad turbo!? Thanks Darwin for your education, appreciated as always.
i got 2 right here
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Old 11-03-2008, 08:25 AM
  #20  
ehall
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Originally Posted by SamGrant951 View Post
fixed.
That was AWESOME!
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Old 11-03-2008, 08:39 AM
  #21  
PorscheDude1
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Easy as pie. Try doing a search, the dual turbo set up has been covered extensively. I think there is even a DIY with tuning maps for download.
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Old 11-03-2008, 11:27 AM
  #22  
ibkevin
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WTF happened here???
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Old 11-03-2008, 11:53 AM
  #23  
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Originally Posted by ModdedEverything951S View Post
Most (and I use most because there are cars like the Toyota Supra) use a twin turbo set-up on an engine with two banks of cylinders (I.E. a V or "flat" design). Twin turbo charging a four cylinder is, as ehall stated already, a waste of time and money. Especially on a 2.5L SOHC 8v engine with already limited room in the engine bay.
Just to be correct the Supra is an inline 6 not a V so that really doesn't apply.

It is really for using 2 smaller turbos rather than on big one to reduce lag and still get enough airflow
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Old 11-03-2008, 12:26 PM
  #24  
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Why the gang-tackle on this guy?
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Old 11-03-2008, 12:55 PM
  #25  
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Originally Posted by blown 944 View Post
Just to be correct the Supra is an inline 6 not a V so that really doesn't apply.

It is really for using 2 smaller turbos rather than on big one to reduce lag and still get enough airflow
There was a 951 enthusiast in Seattle that was fabricating a setup for two small VATN turbochargers for the same reasons Toyota used twin turbos on the Supra. The VATN solution is especially attractive since the turbine geometry changes with exhaust volume. If I remember correctly, he had to use to turbos since large VATNs were not commercially available yet. I believe Porsche now uses a large VATN on their latest 911 turbo.

This was a very interesting project. I will see if I can find his contact information and see how it ended up.
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Old 11-03-2008, 01:11 PM
  #26  
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....group tackle

https://rennlist.com/forums/944-turbo-and-turbo-s-forum/456812-i-appalogize.html

https://rennlist.com/forums/944-turbo-and-turbo-s-forum/455422-absolute-perfection-buyer-beware.html

Originally Posted by MrPorsche951 at 09-09-2008, 06:16 PM
My z4 3.0si is paid in full for the next year and a half. I did a pre-paid lease. Depending on the condition of the car at the end of my term, I might buy it out over another 2 years. (24 payments)

The 951 sell, not bad figuring I bought the car for 6,000 and paid 700 to get it shipped. Put no cash what so ever in it, beat the living **** out of it and just sold it for almost double. I got shipping half price beacuse the mileage discreprency (60 miles were put on the car)

The car was flawed top to bottom, the only thing good was that the outside was Absolutley Perfect. New Paint and rims...

The P.O.S. wouldn't boost, I'd put my foot to the floor untill 5k RPM, I'd smell burning oil and then downshift for fun. I took it in to a friend who runs a 930-993 911 shop and he said "Oh man, this thing is a wreck."

So I drove it civilized... and sold the Leaky, Smoking, Non Boosting car for double what I paid for it. I remember pouring about an ounce of oil out of the intake when I removed it.


But! The current owner loves the car. he left me an email today saying how much he and his wife like the Porsche. I'm buying a 1998 XJ8L with the money.. 39,000 miles on it, in perfect condition, and a 12 month warrenty... just another winter beater with 300hp. Almost faster than the Z4.
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Old 11-03-2008, 01:26 PM
  #27  
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It would make more sense to delete the AC, put a supercharger in it's place for low end power and install huge massive turbo on the right side of the engine. Biggest issue is the low 6500 rpm. The only good reason to have 2 turbos in a 4 cyl is for them to be sequential...in that 6500 rpm there isn't enough time to spool up 2 in a row. If you car had a 8k or 9k redline then I could see an advantage but I'm sure the next time we see your car on Ebay it will have some super rare 12k rpm twin turbo 4cyl in it.
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Old 11-03-2008, 01:28 PM
  #28  
Darwantae951
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Originally Posted by blown 944 View Post
Just to be correct the Supra is an inline 6 not a V so that really doesn't apply.

It is really for using 2 smaller turbos rather than on big one to reduce lag and still get enough airflow
You mis-read my post. I said "most" and singled out the Supra because it was not a "V" or "flat" engine. I am familiar with the Supra layout.
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Old 11-03-2008, 01:43 PM
  #29  
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Originally Posted by ModdedEverything951S View Post
You mis-read my post. I said "most" and singled out the Supra because it was not a "V" or "flat" engine. I am familiar with the Supra layout.
Factory they are a twin turbo, however all of the 1000+ hp street driven Supras I have seen were switched over to a HUGE single turbo.
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Old 11-03-2008, 01:43 PM
  #30  
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I agree that most twin turbos have 2 banks of cylinders, sometimes a sequential setup is
used to help spoolup where a small turbo is used at low rpm, then a larger one takes over as revs increase. 3rd gen RX7 and Audi 2.7 motors use this setup. They seem to be problematic and
many people switch to a single turbo setup. I doubt this would be worth the time, effort & money on a 951. What are you trying to achieve max HP, better spoolup/driveability? I think the exhaust plumbing
would be crazy. My 300ZX TT was a real hassle to work on for this reason. exhaust, intake, intercooler
pipes everywhere.
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