roachie
Taco Master
- Joined
- Nov 2, 2007
- Messages
- 11,133
Where did you find a 2 stroke Deutz?? All of them I'm ever been around were 4 stroke
Chris
Damnit. Werent the small aircoooled models 2 stroke?
Where did you find a 2 stroke Deutz?? All of them I'm ever been around were 4 stroke
Chris
With tube runners of different lengths (remember the tuned port corvette intakes)
You skipped the part where Volumetric Efficiency drops off as the drive pressure increases.
Damnit. Werent the small aircoooled models 2 stroke?
at what lbs/min?
I think that the members on here know turbo power is not free. If you think a supercharger is close to a turbo as far as parasitic losses are concerned, then you sir are wrong. The oem's have traditionally favored superchargers, but there are alot of different turbo engines about to be on the market, simply for fuel economy due to the more efficient nature of a turbo(check out the upcoming Ford gassers). Just an example - quite a few twin turbo mustangs running 700-1000 hp, not too many twin or single supercharger stangs doing that eh? Back to diesels, it costs almost no hp to spin a turbo and the idea of combining the two is a good one because the pitfalls of each are somewhat opposite meaning they should complement each other. IMO some engines will like it, some won't, just a cheaper easier way to get close to twin turbo performance. BTW it is not a new idea, remember the 2-stroke diesels with roots style blower and a turbo?
What would really put this to bed is a strain gauge on the shaft of the turbo... Then we'd know exactly how much power the turbine is generating "for free". I'll bet it's within 5% of the power required by a blower that produces the same pressure and volume.
Until that happens, this probably isn't a discussion worth having.
Not talking about a paxton or vortech centrifugal only, I was never a particular fan of those noisy, poorly mounted things. IMHO, they are junk. The power requirements of one of those is an exponential curve, so yeah, you probably would break things with those. My cousin had a whipple charger on his 91 gt with 65-70k with the factory belt. Broke one belt at like 55k. he was 500+ hp, (basically at the limit of the stock computer, it would run like crap below 45 degrees or so)
Look under the hood of an E55... 6 rib serpentine belt, 550+ hp, with 5.4 liters., and a flat torque curve to red line. 50k warranty, and with a clutch no less...
None that I've seen
Anything down to 25hp or so was 4 stroke!
Chris
at what lbs/min?