Wastegate blows its load too soon!

Braz475 · #1 (**permalink**) 05-01-2009, 08:21 AM

Hey guys first time question here...

I have a 99 F350 Dually 7.3 and just did some modifications and now I'm noticing a problem. I originally only had a Banks six gun and big head wastegate actuator but I just added a 4" MBRP Turbo Back, S&B Intake, PRXB Exhaust brake, Monster Box Transmission, and an SCT Tune stacked with the Six Gun. On the dyno, with the Six gun set at level 1 and a SCT Trans/Boost/Fuel tune loaded in, when it hits 20 PSI the wastegate blows off and stays open and flutters around 0-3 PSI. Any idea what could be the problem???

**SCUFFY828** · #2 (**permalink**) 05-01-2009, 08:28 AM

stacking chips is total waste first off , one out rules the other

Braz475 · #3 (**permalink**) 05-01-2009, 08:32 AM

I got two tunes from SCT, one for Trans/Boost/Fuel and one for Transmission shifts only...do you think pulling out the SCT power tune would make a difference?

**SCUFFY828** · #4 (**permalink**) 05-01-2009, 08:33 AM

id try something different to see what made a difference or not yes

FordCowboy · #5 (**permalink**) 05-01-2009, 08:34 AM

If you have the big head waste gate, can't you adjust the pressure it opens at?

**SCUFFY828** · #6 (**permalink**) 05-01-2009, 08:35 AM

Quote:

Originally Posted by FordCowboy

If you have the big head waste gate, can't you adjust the pressure it opens at?

good point

Braz475 · #7 (**permalink**) 05-01-2009, 08:58 AM

Thanks guys I'll look into it...the Big Head was on the truck when I bought it so I wasn't aware that it was adjustable...I'll let you all know, and get back to you with hopefully a resolution.

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