I doubt it. The exhaust timing was something absurd like 2 degrees BTDC. As I said, the later turbo engines (which were otherwise nearly identical) used the same camshaft timing as the older non-turbo engines, and produced more power than the early turbo engines.

NHRA banned turbochargers in Top Fuel. The turbo'ed Top Fuel experimental engines produced close to 30% MORE power than the Roots blower engines. At the time these engines pushed a few Top Fuel faster than ever before. At the time Top Fuel engines were producing @ 6000hp. The turbo engines made better than 8000hp and broke dynos, vaporize clutches, rear gears, etc. NHRA squashed them, just like NASCAR squashes most any new technology. There are turbo drag classes but IIRC they don't run head to head with superchargers.

I believe the engineering term is adiabatic efficiency. A turbo or supercharger increases an engines adiabatic efficiency and a turbo is more efficient by a pretty good margin.

RT

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When all else fails, vote from the rooftops!
84' Mercedes Benz 300D Anthracite/black, 171K
03' Volkswagen Jetta TDI blue/black, 93K
93' Chevrolet C2500HD ExCab 6.5TD, Two-tone blue, 252K

i confess i have not followed drag racing for many years.

in street applications though i feel that the choice of turbo or super depends on many factors mostly related to packaging etc.

tom w

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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.

Having just told my customer his V8 BMW has totally blown apart..due to a low mounted
K&N filter that sucked up a few quarts of rain water......I'd be concerned about where those filters are mounted.


.

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[http://languageandgrammar.com/2008/01/14/youve-got-problems-not-issues/ ]

"A liberal is someone who feels they owe a great debt to their fellow man, which debt he proposes to pay off with your money."

my 80 saab 99 had a low intake snout. my saab mechanic took it off and threw it away for that reason.

the pistons and rods are really strong as long as they are just compressing air. they dont do water.

tom w

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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.

I still like the belt noise of a blower. Or three

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Thank You!
Fred
2009 ML350
2004 SL600
2004 SL500
1996 SL600
2002 SLK32
2005 CLK320 cabrio
2003 ML350
1997 C280 Sport

Like I said, you can get a snorkle kit. On the truck boards, I haven't heard too many people having that issue. Now if you are talking of a Z28 or something like that, I would be leery.

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01 Ford Excursion Powerstroke
99 E300 Turbodiesel
91 Vette with 383 motor
05 Polaris Sportsman 800 EFI
06 Polaris Sportsman 500 EFI
03 SeaDoo GTX SC Red
03 SeaDoo GTX SC Yellow
04 Tailgator 21 ft Toy Hauler
11 Harley Davidson 883 SuperLow

Another 99er is spotted. That's what I put the turbo in, but that one was a '76. In all, I had six or seven of the things. Great little cars.

http://www.ststurbo.com/air_filter_water_concerns

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01 Ford Excursion Powerstroke
99 E300 Turbodiesel
91 Vette with 383 motor
05 Polaris Sportsman 800 EFI
06 Polaris Sportsman 500 EFI
03 SeaDoo GTX SC Red
03 SeaDoo GTX SC Yellow
04 Tailgator 21 ft Toy Hauler
11 Harley Davidson 883 SuperLow

Even though this thread is going to the Saabs.....didn't the P-38 Lightning have rear mounted turbochargers?

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1974 240D 3.0L 4(M) - 250K -OM617.910 + 300D FW + Rajay turbo power!
1977 6.9 3(A) - 84k

The STS actually make some pretty decent power, go check out the GM boards or Dodge ones. Lag isn't any worse than you'd think.

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I'm not a doctor, but I'll have a look.

'85 300SD 245k
'87 300SDL 251k
'90 300SEL 326k

Six others from BMW, GM, and Ford.

Liberty will not descend to a people; a people must raise themselves to liberty.[/IMG]