opinions: STS vs RADIX
Sep 16, 2004 | 01:24 AM
#211
Originally Posted by rgcbshrty
Something to consider in regards to off idle boost. While idleing the quantity of air flow entering the screw compressor will be of such a minute quantity there probably won't be much of any heat build up issues. With that scenario there just won't be much air to compress, especially when the bypass valve is factored in. Then there is air delivery and the distance it has to travel. The roots paddles the air around the outside of the rotors, while the screw sends it down the middle. Each, if they are the same displacement, will deliver the same quantity of air with each revolution of the rotors. What I would like to know is if each would require the same number of rotor revolutions to build like boost. I would assume the screw would have an easier time of building boost due to actually compressing the air.
Sep 16, 2004 | 01:30 AM
#212
TECH Veteran
Joined: Mar 2004
Posts: 4,632
Likes: 2
From: Sun Diego
Originally Posted by moregrip
a twin-screws worst enemy is any off boost condition, that includes idle.
I think the next one's on Nov 13th.
Sep 16, 2004 | 01:33 AM
#213
Originally Posted by Naked AV
I'd really like to get behind the wheel (actually I'd even settle for a passenger-seat view) of a twin-screw machine and make that judgement for myself. Maybe I'll go to the next Dyno Day in Santee and coax one of those Cobra guys into giving me a ride in his Kenne Bell powered machines. There are always 2 or 3 of them at each event.
I think the next one's on Nov 13th.
I think the next one's on Nov 13th.
Sep 16, 2004 | 01:43 AM
#214
Staging Lane
Joined: Oct 2003
Posts: 98
Likes: 0
From: San Marcos, CA
The best answer would come straight from Autorotor/Lysholm, Eaton, KB Magnuson, Whipple. It may take a few calls, but I've been able to speak with techs from each company in the past, except Lysholm. If you call early enough you can speak with a tech at KB, possibly even Jim Bell. Autorotor has a US division, so calling europe won't be necessary. 
Even then you'll more than likely get conflicting answers. I'm curious as to what each would say about their product.
Even then you'll more than likely get conflicting answers. I'm curious as to what each would say about their product.
Sep 16, 2004 | 01:44 AM
#216
Originally Posted by rgcbshrty
The best answer would come straight from Autorotor/Lysholm, Eaton, KB Magnuson, Whipple. It may take a few calls, but I've been able to speak with techs from each company in the past, except Lysholm. If you call early enough you can speak with a tech at KB, possibly even Jim Bell. Autorotor has a US division, so calling europe won't be necessary.
Even then you'll more than likely get conflicting answers. I'm curious as to what each would say about their product.
Even then you'll more than likely get conflicting answers. I'm curious as to what each would say about their product.
are you on assignment?
Sep 16, 2004 | 02:39 AM
#217
Staging Lane
Joined: Oct 2003
Posts: 98
Likes: 0
From: San Marcos, CA
Originally Posted by moregrip
are you on assignment?
Actually, I think the best answer would come from the SOMP.
Sep 18, 2004 | 03:01 AM
#218
MM&FF did an article on the Eaton vs. Autorotor in the April issue. The KB has the ability to produce much greater boost levels, but running at lower boost levels (8 PSI or so) the Eaton produces slightly more at low revs.
Sep 18, 2004 | 04:51 PM
#220
Originally Posted by rgcbshrty
That was an imformative article. I would definately keep my Eaton if I were to stay at or slightly above stock L boost levels.