13t boost questions

Gmstewart22 · Post by **Gmstewart22** » 13 Apr 2019, 18:47

In that case cant I just adjust my wastegate linkage to hold more boost?

Post by **matthew1** » 13 Apr 2019, 19:05

tardcart wrote: 13 Apr 2019, 18:31 not sure when boost pressure became part of the ECU input. 2000 im guessing, could be 99. Im only guessing, but people use the 99 and 98 ECU in 850's so must not have boost pressure input.

1998. 1997 is the last year for using a manual boost controller without an ECU tune.

Gmstewart22 · Post by **Gmstewart22** » 13 Apr 2019, 19:09

In that case I probably cant just tighten the wastegate linkage my cars was built in 97 but the vin code says is a model year 1998

Gmstewart22 · Post by **Gmstewart22** » 13 Apr 2019, 19:16

Literally purchased both cars from different sellers on craigslist in the same week. One has an excellent body and transmission the other has good motor and trans but beat up body.. between the 2 I am starting my new build

Gmstewart22 · Post by **Gmstewart22** » 13 Apr 2019, 19:20

My wife's car is on the far end.. same color, motor, everything except hers is MY 2000 and its front wd

Gmstewart22 · Post by **Gmstewart22** » 13 Apr 2019, 19:27

Paid $450 for the one with the good motor and trans got the one with penguins sticker free from my neighbor..
Seized motor!

Post by **matthew1** » 13 Apr 2019, 21:31

Cool! Good looking V70. You can adjust the wastegate for different behavior. What it does is change the RPM range when boost is available, not the amount of boost. It's a misconception that it'll increase or decrease boost pressure itself.

Volvo Wastegate Adjustment, A Closer Look - theory
Wastegate Rod Adjustment Results

Gmstewart22 · Post by **Gmstewart22** » 13 Apr 2019, 22:21

Confused.. the attached article says that adjusting the wastegate will increase or decrease the amount of available boost which is what I thought it would do. The wastegate keeps the turbo from overboosting via spring/mechanical pressure against waste gate door??

Post by **matthew1** » 13 Apr 2019, 22:36

If it was that easy, the ECU tuning companies would be out of business.

Gmstewart22 · Post by **Gmstewart22** » 13 Apr 2019, 23:06

Perhaps this is just my ignorance, but when I turn up my wastegate pressure I get an overboost code and my computer compensates by cutting fuel my tuner guy says that's what he tunes for.. he adjusts the computer to accept a higher value.. man now I'm really confused! Again pardon my ignorance I've only been into volvos for a few years and just recently started nodding them