Boost controller

[mr_beverage]

hey all

im planning on upping the boost pressure on my 760 T (B23ET)
and im wondering what else has to be done and checked so it can be done without any dramas
my car is running stock about 6 pounds i want a maximum 4 pound increase wehn i increase the pressure will the fuel ration change to accomodate it also will the maf sensor be ok with th changes my car has motronic system

any info on the subject or similar subjects would be greatly appreciated

cheers

[dl242gt]

It'll be quite easy getting the boost upto 10psi. The motor can handle it just fine as long as you have it at what we call stage zero. Which is that the general performance and condition of all parts are about upto factory level when it was new. The motor can handle the boost but it does make more heat so that's why you want to be sure everything is in good condition.

Before upping the boost get a boost gauge that is numbered so you can adjust it to a known reference point. You'll want to listen for any ping and back off and adjust the boost down a bit if that happens. One of the guys mounted the boost gauge in place of the clock. Other folks usually pod mount or mount on the top of the dash between the hood for the gauges and the windshield pillar. A four psi raise in the boost is very good for power
and turbo enjoyment. But the gas will disappear faster.

Enjoy the road,

[mr_beverage]

so my computer teamed up with the maf sensor should regulate the fuel\air ratio accordingly?


thanks dlot

[mr_beverage]

this is the bc im getting

[mr_beverage]

attach dammit

[dl242gt]

From what I've read and experienced here and reading at Turbobricks. The stock fuel system is good for around 12psi without any help. But with a stock exhaust I experienced ping around there and could only run around 10-11psi. Once I got
a better exhaust and put in a K&N air filter I could run the motor
around 12psi. IIRC you already have an exhaust on your car so you should be OK for boost in that area.

Enjoy the road,

[mr_beverage]

boosted upto 10 pounds today woo but blew my brake booster cap off and now have an air leak in the booster system....bummer

ive blocked it off with a home made cap but i dunno how long it will last

[Dauntless]

Big difference over the stock boost in terms of performance?

[Matt Dupuis]

Originally posted by dlot
get a boost gauge that is numbered

Thanks, Dave! :D

[mr_beverage]

boosting great!! still only 10 pounds but thats as much as my exhaust will allow

i did 0-100 in under 8 seconds the other night

not to mention the numerous snaps at the lights

[dl242gt]

That's great! The general rule of thumb seems to be about
8hp per psi. So just going up 4 psi is 32hp. Very nice bump
in power. I also popped the top of my brake booster check
valve off. I guess they just don't like that big power.

Enjoy the road,

[mr_beverage]

Originally posted by dlot

I also popped the top of my brake booster check
valve off. I guess they just don't like that big power.

Enjoy the road, [/B]

what do you mean by check valve off

[dl242gt]

The little white valve that is on the brake booster where the hose from the manifold attaches is a one way valve. It gets old and weak. So with the boost turned up a bit higher the top of it blew off. Mine was over 20 years old when it happened.

Best regards,

[mr_beverage]

yea exact same valve cap blew off mine..... imade a makeshift cap out of a washer , some electrical tape and some cable ties its seems to be doing the job just fine