Neo With Stock Exhaust System Recommended Boost Pressure.

[David_j_p]

I have scoured SAU and the web and I did not find a answer to this.

I have series 2 AWD auto stag, which is completely stock except for a manual boost controller which I have just put in.

I know I will have a restrictive exhaust system (it is our family wagon, and I like how quiet it is), and I wont get much more power out of it, but it gets up to full boost and power noticeably faster now, and that's all I was after. Handy at the lights ;-) and for overtaking. Off the mark till about 40km per hour, it was slower than the Manual Subaru Outback that I used to have!

Anyhow I am currently running 9psi. Can I go to 10 or should I be running less? Is back pressure going to hurt anything?

Any advice will be muchly appreciated!

[Dose Pipe Sutututu]

yeah just bump it to 0.7bar... in winter 0.8bar won't hurt on the stock SMIC

[wolverine]

For the record it is possible to get a Stagea dead quiet with a 3" exhaust due to the extra room at the rear of the car. You can fit in a very large can back there that will kill the noise.

[David_j_p]

Thanks guys. 0.7bar. and 0.8bar is 10 and 11psi. I'm running 9 and will take it up to 10 when it cools a bit in a couple of months, just to play it safe. I don't take it on a track lol, and live in a rural area with bugger all sets of lights, so I dont stomp on it very often, so my SMIC will do the job. Its just nice to have the power there when you need it or want to have a little fun! Just bypassing the boost solenoid with the boost tee and running stock.

I put my boost gauge on before the MBC and (from Memory) found it would boost to 6psi at 2500rpm then switched over to 8psi art 4500rpm.

After MBC I set it to 8psi, and found I got 8psi even before 2500rpm. This alone has made a big difference in power delivery! a couple more PSI and its a different beast. Great bang for buck!

Ill look into a quiet 3inch all the way when I have some money. Its got to make a difference, particularly to the top end power, which my little mod has not gained very much of.