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Engine Specific Info and Questions => IDI Engine => Topic started by: dirtydiesel on September 05, 2007, 08:27:54 am

Title: control your boost pressures
Post by: dirtydiesel on September 05, 2007, 08:27:54 am

i have a AAZ TD and i'm running a AHU turbo with a manual boost controller, but the controller does not seem to doing its job anymore , is this possible. my turbo is spiking like crazy when i giver the fuel. over 30 pounds at times. How can i cure this problem. help please. Thanks

Title: control your boost pressures
Post by: Vincent Waldon on September 05, 2007, 08:54:35 am

Manual boost controllers, particularly if they are the simple "bleed nozzle" type, generally do a poor job at best actually controlling boost, *and* are quite dependent on how they are set up... length/diameter of tubing, method of tapping into the wastegate, etc.

Has your turbo/boost controller always behaved like this or did it suddenly start ?  A bit of a description and/or a picture of your setup might generate some ideas, but if you have an el-cheapo boost controller you are probably getting exactly what you paid for !!!


Vince

Title: control your boost pressures
Post by: OM617 on September 05, 2007, 10:04:33 pm

Bleeders are junk. Ball and spring is the only accurate way to go.

Title: control your boost pressures
Post by: Cheesetoast on September 05, 2007, 11:42:53 pm

mine was spiking at 30 a few months ago, a line had become disconnected in the engine bay

Title: control your boost pressures
Post by: dirtydiesel on September 10, 2007, 05:19:31 pm

its a kinetic boost controller, and it got worse and worse , it was graduale. just using stock waste gate for now .

Title: control your boost pressures
Post by: stewardc on September 11, 2007, 04:36:47 am

Quote from: "OM617"

Bleeders are junk. Ball and spring is the only accurate way to go.

What's the difference, and who sells the best controller?

Title: control your boost pressures
Post by: saurkraut on September 11, 2007, 05:45:13 am

Home made ball & spring:

http://www.geocities.com/chmwatson/FAQs/mbc.html

Title: control your boost pressures
Post by: hillfolk'r on September 11, 2007, 05:59:33 pm

a bleeder "bleeds" the boost sensing pressure to atmosphere instead of letting it actuate the wastegate
a ball+spring  setup just blocks the air signal to the wastegate
i use a 15 dollar campbell hausfield "mini air regulator" i  got at home depot 3 or 4 years back
it works fine,with minimal boost creep/spiking/crap,and ive got it mounted next to my console soits adjustable fromin the cabin

Title: control your boost pressures
Post by: Slave2School on September 11, 2007, 06:04:20 pm

Chris was using a ball and spring, the sprig has somehow become bunged up in his unit after a few years of hard use.