What Exactly Does This do??
12-05-2007, 08:52 PM
#11
1.5 BAR
Join Date: May 2005
Posts: 840
Re: What Exactly Does This do??
One the Holsets they call it the "Map width enhancement ring" It pushes the compressor maps surge line to the left giving it a bigger usable area. It does hurt peak numbers a little bit though. But for a small displacement motor running a big turbo it is a nice thing to have.
I think it works by letting the front of the compressor wheel kinda of recycle the incoming air instead of going into full surge.
The picture above of the "silencer ring" is just that. On the oem dodge holsets they added a cone shaped plate that is held in with a big clip to quiet the turbo down. No difference with it on or off as far as performance is concerned, but it sounds better with it off.\
I think it works by letting the front of the compressor wheel kinda of recycle the incoming air instead of going into full surge.
The picture above of the "silencer ring" is just that. On the oem dodge holsets they added a cone shaped plate that is held in with a big clip to quiet the turbo down. No difference with it on or off as far as performance is concerned, but it sounds better with it off.\
12-05-2007, 09:36 PM
#12
0.5 BAR
Join Date: Feb 2007
Posts: 61
Re: What Exactly Does This do??
Originally Posted by SinisterCRX
12-05-2007, 10:01 PM
#15
0.0 BAR
Join Date: Nov 2006
Posts: 0
Re: What Exactly Does This do??
Originally Posted by philly sleeper
All I really wanted to know is if the ports do suck in air?? And if every turbo with this port is functional....
To redeem your stupid post pictars of your nude mother asap.
12-05-2007, 10:10 PM
#17
0.5 BAR
Join Date: Feb 2007
Posts: 61
Re: What Exactly Does This do??
Originally Posted by Eville140
I think it works by letting the front of the compressor wheel kinda of recycle the incoming air instead of going into full surge.
During optimal conditions a minimal amount of air will get sucked through the anti-surge ports and mainly through the compressor wheel minor(inducer) side. If the turbo starts to flow more air then the engine can take at a given RPM you will get a backup of air in the charge piping the same way that it happens when you close the TB while boosting. Instead of this air reverting through the compressor wheel slowing it down and creating huge jerk loads on the fins and shaft the air will "bypass" the wheel through the ports and get sucked back in.
It is rumored that some efficeincy is lost because of these ports elsewhere in the range of the compressor but i have never been able to find data or compressor maps showing any difference between a ported and non-ported housing on the same compressor setup.
12-05-2007, 10:11 PM
#18
0.0 BAR
Join Date: Dec 2003
Posts: 0
Re: What Exactly Does This do??
Originally Posted by NismoPlsr
The original poster was not circling the lack of a ring. He circled a part of the compressor housing which happen to be the anti-surge ports. So telling him not to worry about a part that you do not normally see is to tell him to be ignorant, you happen to play the part very well.
12-05-2007, 10:24 PM
#20
Guest
Posts: n/a
Re: What Exactly Does This do??
Originally Posted by SinisterCRX
It appears the original poster changed his pretty little picture at the beginning of the post. So we were talking about two separate things. Regardless, you can still go fist yourself
