rufretic

iTrader: (37)

I'm making a little more boost than I would like to with my F2 at 26psi. Right now the inlet is wide open. How much do you think adding a 4" 90 with a big air filter will lower the boost? I know some people have used a retrictor plate on the blower inlet to limit boost so I figure adding a filter should restrict it some in the same way, I just have no idea how much. I'd like to get it down to around 20psi. I know I can swap pulleys but I'm planning to add the filter anyway so I don't want to start messing with pulleys unless I have to. Any ideas on how much boost might be lost with the air filter?

AFASTYZFR1

iTrader: (55)

I don't have an F2 so I have no idea how much it will limit your boost, but it you are going to run it on the street a lot you might as well throw a filter on it and see what happens. Then you can re-pulley it if necessary.



But a 4" 90 with a large filter probably won't limit it much

nastychevelle

iTrader: (7)

if your planning on doing it anyway just do it and let us know and then swap pulleys if it doesn't lower it enough

Pro Stock John

iTrader: (34)

You should run a filter anyway so go get it and see what it does. I fugged up my blower from ingesting crap, that's why my blower went from being a YS to a YSi.

gametech

iTrader: (1)

If just a filter doesn't do the trick, you could also use one of those filter socks for added restriction.

rufretic

iTrader: (37)

Thanks for the responces guys. I thought maybe someone would have a back to back with and without the filter to give me an idea on how many psi I might lose. I'm guessing only about 2psi but I guess I'll just try and fit one on and see what it does.

rufretic

iTrader: (37)

How many miles did you run it without the filter to cause that? I didn't think it would be that big of a deal since I only put about 500-1000 miles on the car a year. Now I'm going to put the filter on for sure just for that alone.

'Trust'

iTrader: (24)

I picked up 3.5 PSI with no airfilter.

rufretic

iTrader: (37)

Wow, that's a pretty good amount. Maybe the air filter will get me to where I want to be.

WAHUSKER

iTrader: (4)

I didn't monitor the boost change but I picked up 35rwhp by removing my 90* elbow & large cone filter on my F1 at 14 psi so it should "help" to add one....

ls1290

iTrader: (20)

A restriction plate is a well proven concept for limiting the amount of boost.