Waste Gate Tuneing

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Waste Gate Tuneing

Postby RSWORDS » Mon Jun 08, 2009 2:12 pm

Okay with my POD's and my Silver 62 the truck ran around 52-54psi, had pretty good spool up. Put in my 6x16's, pegged the 60psi gauge, spool up was OK.

Pulled the turbo off to turn down the waste-gate, leaghtened the rod about 7 turns (was told this should drop me around 14psi). Now spool up SUCKS!!! It does OK to about 14psi then it starts to get real smokey and the spool up stops, I assume this is were the waste gate is starting to open now. Problem is it still boosts to 50psi! take it a couple seconds to get there but it still goes up... WTF!!!

I want my OK spool up back and around 45psi. I'm afraid if I shorten the rod some more I'll get my spool back but still be pushing 60psi.

Thoughts?
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Postby RSWORDS » Mon Jun 08, 2009 5:11 pm

For some reason I want to say I saw a thread in here about porting the wastegate on a turbo... I looked but cant find it...
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Postby KTA » Mon Jun 08, 2009 8:32 pm

For best results get a electric solenoid to cut the boost signal to the wastegate. Install a hobbs switch to only allow boost pressure at say 35+_psi. Set your wastegate to fully open at 45psi. You get the best spoolup due to no boost creep, and you get boost regulation like you want.
Fleet of Junk: 1989 D350 627rwhp 1300 tq B-1/Hx60 twins, KTA pump/injectors, ported head, BIG fuel supply. 13.75@ 109.5mph 1/4: 1992 W350 Cab-chasis, 1993 W350 ext cab cust.370 inj Hx40/16cm 290rwhp hydroboost brakes,1984 D350 crew-cab another project.
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