Who has supercharged....

[rjwoods77]

Who has supercharged their car and what manufacturer and type of "blower" did you use? Sucess? Failure? What has delft and rmit run?

[rjwoods77]

Who has supercharged their car and what manufacturer and type of "blower" did you use? Sucess? Failure? What has delft and rmit run?

[Manas]

Asking abt the same qn. . .

As a measure to counter Knocking, do the teams (who supercharge their engine) compensate by a change in Cylinder head Geometry and/or Compressoin Ratio ?

or is it that no such change is reqd ? and all knock prevention is made by A/F ratio change , Ign timing modifications etc..?

Manas.
Defianz Racing,
\\//, Live Long and Prosper

[jonno]

Rob,

Were investigating supercharging, it's early days yet though, and we've been adviced that forced induction is not the way to go with our engine.
We were considering the 'charger of a mercedes 230 slk, alternatively a few companies produce electric superchargers: however bear in mind that most of the standard alternators on 4 cylinder engines are approx 350 Watt (i think). If you are already running twin fuel pumps, ecu's rad fans & water pumps you will barely be making sufficient charge. Bring an electric supercharger into the equation & you'll be running out of electricity after the first lap.
Manas, we're considering dropping the compression ratio of our engine. The knock you'd get would be phenomenal on a 12:1 engine with forced induction

[Travis Garrison]

jonno,

Have you looked into simply running E85? It requires more effort be put into your fuel system, but the up side is that you will likely be able to get away with stock compression.

If you're looking at centrifugal supers Rotrex makes (or made?) what looks to be some very compact units (for fuel cells).

And Corky Bell's book shows an Opcon Autorotor that looks relatively tiny, but all I've been able to actually find are superchargers for 1.2L engines...which might not be too far off... http://www.opconab.com/index.asp?langID=2&cID=14&spage=1 I suspect that Opcon's fuel cell systems might be more along the size we want...


-Travis

[Scott Harsila]

Cal Poly(I think), ran an electric supercharger powered by a dedicated GM alternator(100amp?) in 2000 I think. I think they placed top three. They must have made good power becasue they had to push around huge wings and the car weighed like 600lb. Maybe someone else knows the specifics.

[MikeWaggoner at UW]

<BLOCKQUOTE class="ip-ubbcode-quote"><font size="-1">quote:</font><HR>Originally posted by jonno:
Manas, we're considering dropping the compression ratio of our engine. The knock you'd get would be phenomenal on a 12:1 engine with forced induction <HR></BLOCKQUOTE>

Even supercharging, you're compressing a partial vacuum at 12:1, not normal air. It'd be interesting to run one of these engines up to operating RPM and check the air pressure achieved in the cylinder without compression vs. std. bike intake.

[Mark Bacchetti]

It wasn't so much about the peak power as it was about the flat power curve. That car had tons of power everywhere.

Mark

Cal Poly Pomona