StankCheeze

iTrader: (1)

I've got pretty much everything required to run big boost sitting in my garage. The only thing i don't have is a downpipe, and my budget is running thin. I can weld and MIGHT be able to fab one, but if i fail, is there any danger to running 15+ pounds on the stock pipe besides taking all day to spool?

db84drteg

iTrader: (2)

Holy crap, I was getting 7 psi at 4500rpm ... I can't imagine what 15 would take =P Then again, I was on the stock exhaust as well =P

SloS13

iTrader: (1)

the first few psi is what takes some effort to create. After 5 its pretty easy to make whatever boost you want

kotomile

iTrader: (24)

zoom2zoom

iTrader: (5)

bottlenecked exhaust gas can blow head gaskets.

akaryrye

iTrader: (5)

It would probably work, just gonna be slower response and boost control problems. Also apparantly the threat of head gasket issues. gl

StankCheeze

iTrader: (1)

Perfect, that'll make me get off my *** and finally do my DIY head porting on the spare head sitting in my garage

Braineack

iTrader: (62)

I dont see how high backpressure will blow head gaskets.....

I can see it increasing the intake temps and causing detontation.....but not just blowing out a head gasket....

Ben

iTrader: (33)

10-12 psi is more likey. and power that will come on like a lightswitch after 5k.

jwarriner

On my Talon I ran 26psi through the stock exhaust with a gutted cat. It doesn't blow head gaskets, it's just somewhat counter productive. I was trying to get the best quarter mile time I possibly could one night with what I had, but in general turning up the boost before optimizing your exhaust is *** backwards. I'd also upgraded the turbo with one I had laying around, which once again is *** backwards on a stock exhaust. But it was a fun time.

StankCheeze

iTrader: (1)

I know it's *** backwards, but the only things I buy new are tires. Downpipes don't come around that often

jwarriner

Ok. Well to answer your question, assuming a good tune with no knock, there is no inherent danger in this unless you run into the surge line on your compressor map (which I doubt in this case).

Loki047

iTrader: (6)

Isnt a tony dp on sale now?

magnamx-5

iTrader: (7)

I get like 13 psi by then geez.

StankCheeze

iTrader: (1)

Yeah, but with a welded on cat, so the owner is unlikely to separate. I'm not much for cats, much more of a dog person

Braineack

iTrader: (62)

still got the stock exhaust?

magnamx-5

iTrader: (7)

nope 2.5 inch lemme check a DL MBC is killing me i get anywhere from 12-14 psi by 4500, and i get oscilations of 1-2 psi until redline with the MBC set to 15 psi. I need to get off my *** and get inside MS to figure out this ebc, and spark ****. No cat +dynamax truboflow muffler.

Braineack

iTrader: (62)

yeah well they're talking about with the stock exhaust....i wouldn't expect anything better.