dejacky

iTrader: (2)

I found some interesting reading on www.bullseyepower.com regarding their turbo compressor wheels with extended tips. They claim it can allow the same trim size turbo to flow ~100hp more on pump gas without sacrificing spool time. How much of this is gimmick and how much of it is true?

mitsuguy

iTrader: (2)

the "extended" fin is good to a point...

Mitsubishi turbos, this is found in the "b" series versus "g" series wheels...

It is true that a "g" series wheel will flow more than a "b" series wheel, with everything else being the same, however, only to a point... In the Mitsu turbos it has to do with less of a blade count, and every other blade being longer...

Sounds like hype that I wouldn't believe until they got a back to back dyno, with the only variable being the turbo impeller blade...

Also, adding mass to the impeller will slow down spool time, how much - depends on how much mass is added, so, unless they've found a way to make the blades on the impeller longer but stay the same weight, then having the exact same spool is impossible...

dejacky

iTrader: (2)

would their lightweight billet aluminum "extended fin" compressor wheel option help with making spool time shorter?

mitsuguy

iTrader: (2)

I highly doubt their billet aluminum compressor wheel is much lighter if any than any other similarly constructed Mitsu / Garrett style wheel...

again, look for a back to back comparison for real world data...

c0wboy

If you're talking about the Schweitzer turbos that Bullseye sells, all I can say is to check out the compressor maps. The maps especially for the smaller turbos are beautiful. Very high efficiency in broad islands, and very high ratios with still great efficiency. Take a bit of time to go through the maps adn you can see the difference.

Thanks man,

Eric

mamurra2

Although, more blade area will flow more air at a lower wheel rpm, so that can account for some positive effects on spool time. But like you said, the only way to know is with real world testing.