Quote:
Originally Posted by madfast
again, who's talking about centrifugal superchargers? the whole discussion was about a possible TRD Roots SC... and in that regard there are little to no companies making roots kits for import engines let alone small displacement 4 cylinders. that's what i mean by "properly designed". most of the roots kits use older eaton units and are most likely not intercooled.
i never said intercooling had anything to do with efficiency. when i talk about intercooling it is in regards to the fact that most import roots SC kits dont use them. as for efficiency, the newest TVS and twin screw designs have efficiency in the 70%, close to 80% range.
that's my point. all the hig quality roots SC kits are made for domestic large displacement engines. if someone cared enough to use them on a small displacement engine, i think you'd be surprised just how much you can get out of them.
again, what's with you and centrifugals? no one is talking about centrifugals. the whole discussion was about roots blowers.  and roots blowers have NO lag, make boost linearly, and DO give you a flatter tq curve boost for boost.
this is a 2.0L ecotec (on 100 octane)
and this is a RSX with a custom lysholm kit (@16.4 psi)
find me a turbo 2.0L 4 cyl that makes that much power with a flatter tq curve.
who said anything about power?  |
Instead of typing a rebuttal for everything you just wrote, which I do have, I'm going to simply point to the obvious.
-Turbo's dominate the import world for a reason, and it's not because someone isn't trying or improperly designing S/C'ers for Imports
-Roots type S/C'ers are available on some import applications...yet fact still remains, turbo's are the preferred F/I application on 4banger imports. I am unaware of any 4banger import that's making 600-1000+whp off of a S/C'er, and it aint because all S/C'ers for 4bangers are improperly designed. Go to one of the IDRC events and count the number of S/C'ers in the field.