hey does anybody know if a ported shroud compressor housing (used to get rid of turbo surge) will make more, less or the same amount of boost then the stock compressor housing? thanks

 

In order to understand how an 'anti-surge' compressor housing works (which is technically a 'ported shroud'), you need understand what surge is, in the first place.

Surge: The 'Surge Line' is the leftmost boundary of a compressor map. This is where flow instability occurs - This is where the compressor wheel is spinning at a high enough speed to force more air than the engine can injest. On initial thought, one might think this would just give you more pressure in the intake - and this is true, as long as you are on the compressor map. Basically, the surge line is the MINIMUM airflow needed to keep the pressure from backing up, and causing reverse flow pressure waves - these are INCREDIBLY damaging to the turbocharger!


Follow that thought a little further - when are you constantly seeing high flow of air, but little entering the intake? That's right, when you get off the throttle from boosting. This surging is what a BOV protects the turbo from. You also see this, if you have attempt to spin a compressor wheel such that it is forcing more air into the intake than the engine can take - or attempting to get more boost per rpm of the compressor wheel, than it is designed for.

That said, the ported shroud allows the surge line to be moved further left - this is because the compressor housing allows some of the air that starts to get backed up in the intake, to flow back out the housing.


This was stolen from another post pf

 

understand that part but if im going to lose boost pressure then im probably not going to spend 400 on it and just get a WW and hope that it cures my problems. the WW isnt always a complete solution but the housing is, i just dont want to lose to much boost.

 

The way I understand it, you may loose spool time, but you will not loose "effective" boost.

What you need to do is figure out how you are using your truck, then go from there.

Good Luck, because personally, that is the hardest question I have tried to answer. Everything just doesnt seem to apply while modding.

 

right thats a good point. do you think if i put the housing on with a WW that it would increase the spool time? im trying to make my truck quicker but i really hate that turbo surge.

 

No I dont..

Maybe a 38r with a ported housing. This would give you your spool time with out surge.

 

never thought about that, thank you for the help i really appreciate it!

 

No problem, have fun!!

 

WW and ported housing suck and are noisey to boot. Just use one or the other. Guys do put the WW in a van turbo and like it.

 

The "Wicked Wheel" is a downgrade from the SD wheel. It is a stock OBS wheel and move slightly less air which is why it cures a lot of the surge issue. I have a van charger with the ported housing. It spools awesome and as well as my stock OBS charger with the same size exhaust housing. I would put a 38r on before I would mess with a van charger and ported housing though. This setup was on the truck when I bought it.