Not the typical question about venting

[tim4g63fast]

OK such a large number of people are so extremely worried about venting to the atmosphere. I know what it takes to do it and i guess i know why. I am under the impression that there is a point when venting can hurt performance so i was told. where is that at, roughly. I mean most people i know running gm set ups don't run them just so they can vent they run them to better tune there car so they say. I don't have much knowledge of gm maf. anyways just wondering is there a point where the turbo is sucking so much cfm that the recirculation causes air flow disruption enough to affect hp. If so what cfm is it.

I have never vented to the atmosphere and am happy with the sound, actually i could care less about the sound. You can still hear the bypass/blowoff valve reasonably loud at 15 psi.

 

[talondude4]

http://dsmtuners.com/forums/showthread.php?t=126936&highlight=cfm+stand+for?

search next time man....

read the bottom one.

c cubic
f feet
m minute

cubic feet per minute.

 

[tim4g63fast]

I read the whole thread but i still didn't answer my question. I know it is a very vague question but i will try to reword it

at what point dose recirculating into the intake track become more inefficient Than venting to the atmosphere. does anyone have a cfm or lbs/min answer to this.

now that i think about it i guess that venting would be more eff. as long as you had the supporting mods to do so.

so if i was looking to run 11s would recirculating still be alright and could i do that on a stock maf. just another random question.

 

[98gstshadow]

well our cars are designed to use that blow off pressure that is sent back into the intake, so when it is vented to the atmosphere and the computer is thinking it is getting the air what do u think is eventually going to happen? my turbo blew because of this and a little over boosting but 17psi on a stock turbo with supporting mods shouldnt blow it, did this help any?

 

[tim4g63fast]

I know that but Ive been told that there is a point that when you recirculate it creates a tornado effect in the intake track disrupting air flow. the more i think about it and as fast as the turbo sucks it would take a lot for disruption to be worth talking about but at the same time in reality disruption is preeminent in even a stock setup. not that your going to gain hp by just being able to blow off to the atmosphere if it could be done correctly but you would create a better flow in the intake pipe by not blowing a bunch of air in there.

so what I'm trying to figure out is if there is a certain point when blowing off to the atmosphere is in your best interest. (using of course a gm maf style setup not just unhooking your recirculation pipe)

which also brings me to the question if you run a stand alone do you have to run you maf.
if you don't what about dsm link does it allow you to run without a maf

 

[tim4g63fast]

I guess you would still need to meter air so i guess you would still need to run a maf. i think i answered that part of the question myself. I'm retarded

 

[Defiant]

I know that but Ive been told that there is a point that when you recirculate it creates a tornado effect in the intake track disrupting air flow.

It's going into a turbine at one-hundred, fifty thousand and more revolutions per minute. What "tornado" is going to survive that?
Unless you're going to a blow-through system, recirculate the BOV on a DSM. Period.