Who makes this supercharger!?
On The Tree
Joined: Nov 2001
Posts: 108
Likes: 0
Re: Who makes this supercharger!? as for for air flow, I pull in 58lbs/min by 5400rpm.
From there it is flatlined until 6500rpm as my pcm won't read any higher.
It was probably well over 65lbs/min at the power peak.
The roots blower should get a big mass flow increase in very early in the rpm range. Then it will steady out.
It won't make the peak power of a good centrifugal but will have much more low end.
For some cars this would not be of any advantage.
For instance with my 2800PI Stalled a4,
At any WOT punch I flash up to 5000rpm and pull from there. So I see an instant 7psi and build to 10PSI.
A m6 or stock stalled a4 would benefit more from the off idle punch of the roots blower IMO.
Steve
From there it is flatlined until 6500rpm as my pcm won't read any higher.
It was probably well over 65lbs/min at the power peak.
The roots blower should get a big mass flow increase in very early in the rpm range. Then it will steady out.
It won't make the peak power of a good centrifugal but will have much more low end.
For some cars this would not be of any advantage.
For instance with my 2800PI Stalled a4,
At any WOT punch I flash up to 5000rpm and pull from there. So I see an instant 7psi and build to 10PSI.
A m6 or stock stalled a4 would benefit more from the off idle punch of the roots blower IMO.
Steve
Staging Lane
Joined: Dec 2001
Posts: 60
Likes: 0
From: Webster
Re: Who makes this supercharger!? That's a nice looking setup. If you notice the vacuum controled lever on the front left of the charger, this looks alot like the bypass option on the bonnevile 6 cylinder engines. while engine has reasonable manifold vacuum, the charger is bypassed. Once you hit the gas, manifold vacuum drops and so the vacuum is lost in the vacuum actuator causing it to release the lever which controls a valve that would close in affect causing the charger to pump the air in rather than let the air be sucked in under the charger... <img src="graemlins/fluffy.gif" border="0" alt="[Fluffy]" />
[ December 17, 2001: Message edited by: Steve Underwood ]</p>
[ December 17, 2001: Message edited by: Steve Underwood ]</p>
TECH Resident
Joined: Nov 2001
Posts: 854
Likes: 0
From: san diego ca
Re: Who makes this supercharger!? ...besides, I can't envision any circumstance where I wouldn't want boost! <img src="graemlins/fluffy.gif" border="0" alt="[Fluffy]" />
okay, Reverse, maybe! <img src="gr_grin.gif" border="0">
besides, what's so bad about a power dome hood? And nitrous oxide makes a great intercooler! <img src="graemlins/gr_cheers.gif" border="0" alt="[cheers]" />
<img src="graemlins/camaro.gif" border="0" alt="[Chevrolet]" />
okay, Reverse, maybe! <img src="gr_grin.gif" border="0">
besides, what's so bad about a power dome hood? And nitrous oxide makes a great intercooler! <img src="graemlins/gr_cheers.gif" border="0" alt="[cheers]" />
<img src="graemlins/camaro.gif" border="0" alt="[Chevrolet]" />
Re: Who makes this supercharger!? Where I see this as valuable is for m6 guys with stock 3.42 gears. The toughest thing is to launch high enough in the rpm band as not to bog.
With this setup, launch at 1500 and shift at 5000 to get into the higher gear ratio to take advantage of the low end boost.
Who wouldn't want to launch lower and shift at a lower rpm and run quicker times?
With this setup, launch at 1500 and shift at 5000 to get into the higher gear ratio to take advantage of the low end boost.
Who wouldn't want to launch lower and shift at a lower rpm and run quicker times?
