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Old 12-30-2009, 07:10 PM   #1 (permalink)
Diesel Boss
Join Date: Dec 2009
Posts: 1,003

Home made boost controller

This was way to easy not to post and a lot cheaper then paying $110 bucks for one.

Before we started the truck was peaking at about 6 psi on the street and only holding maybe 4.5-5 psi.

We started by cutting the housing where it bends over to brake it open. As you can the inside is very simple.

Take a grinder and grind off the little cap on the end of the rod. Take it easy on it so you can save the little cap on the end to use latter.

Next take a tap and die set and thread the factory waste gate rod. I ran this one down a little over 2 inches.

Then its as simple as putting every thing back the way it came off. The only diffrence is your using a nut to adjust the spring pressure. I turned this one all the way out to start off and made about 5 pounds of boost. After a lot of testing i ended up turning the nut about 12 times or about 3/4 of a inch to make about 9 pounds of boost. This is what it looks like on the truck.

The truck is now hitting about 10 psi then droping to a solid 8 and doesnt drop below 6 even at higher RPM's. During normal driving you can hear the turbo much more and the truck now makes about 6 psi under normal driving conditions unless you get on it a little bit of course

There is still a little room for improvment but over all boost is now a lot more controlled and doesnt spike and drop like it did before. Just the few extra PSI has woken this old girl up.

1994 F350 4x4 ZF-5 7.3 IDI Turbo. (SOLD AND NOT LOOKING BACK)
1993 ext cab 3500 4x4 6.5TD 360,000 (SOLD)
1985 K10 6.2 banks TD (SOLD)
2000 Turbocharged WS6 TA 524rwhp 498Torque (SOLD)
2001 LQ9 IRON 409, T56, 9 inch, 471rwhp 450Torque (SOLD)
2005 GSXR-1300 (SOLD)
2002 2500HD LB7 4x4 (PPE valve, MBRP 4 inch, AFE stage 2, Profab horn, EFI live) (SOLD)
2002 3500 DRW LB7 4X4 ZF6
1985 Toyota PU 4x4, Solid axle, 35 MT's, duel lockers, 5 speed.

Last edited by cbr600rx7; 12-30-2009 at 07:12 PM.
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