Regarding wastegate disconnect.........
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Regarding wastegate disconnect.........
what are most of you doing..............actually disconnecting the acuator arm, or just disconnecting the red pressure line, (and cap it off, and cap off the nipple on the wastegate). Mines an early 99 PSD.
??
Thanks,
Eric
??
Thanks,
Eric
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Thanks, I figured 
, BTW, what program is your favorite on the Predator? I have an Identical setup to your truck, as far as mods. On my truck, the 85HP feels as strong at the 100HP, at least to me it does, The 85 HP seems to make at least 25 psi of boost most of the time, and EGTs climb faster on the 85HP one.
It just may be that the 100 HP is ramping boost so fast that the wastegate is blowing open, so I wanted to disconnect it and do some testing that way.
Eric
, BTW, what program is your favorite on the Predator? I have an Identical setup to your truck, as far as mods. On my truck, the 85HP feels as strong at the 100HP, at least to me it does, The 85 HP seems to make at least 25 psi of boost most of the time, and EGTs climb faster on the 85HP one.It just may be that the 100 HP is ramping boost so fast that the wastegate is blowing open, so I wanted to disconnect it and do some testing that way.
Eric
Last edited by eeglot; Apr 23, 2004 at 12:00 PM.
Laughing Gas
Joined: Apr 2002
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From: Newport News
I usually just run the 60 HP setting on the Predator. Has plenty of power, and pretty good fuel mileage. I'm also running a Predator that hasn't been updated with the new settings. The current 85 HP that I have sounds really rough on the engine. Almost sounds like the injectors are gonna blow up. TONS of power though...will definitely smack you back in your seat. I have noticed that my EGT's shoot up fairly quickly on everything but the 40 HP setting. I can tag 1000 (pre turbo) in a hurry if I'm not careful, but I usually make sure I keep it at 800 or below just to be on the safe side.
Terry
Terry
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From: Reed Point, MT
Maybe I'm a little out of line here, but a Powerstroke diesel isn't exactly built to 'diesel standards' on the bottom end (Big Block Chevy-sized connecting rods come to mind). My cousin's '02 PSD chucked a rod because of over-boosting which resulted from disconnecting the wastegate actuator. The reason for a wastegate is to allow for a smaller tubine housing to build boost at low RPM and not allow overboost at higher RPM. Ever look at a 95-97 Powerstroke turbine housing? You'll notice NO WASTEGATE. (You'll also notice no low end boost.) A 95-97 has to be spinning at least 2500 RPM to make 15-18 lbs. of boost when equipped with a "quick turbo" housing and a chip. A 98-up Powerstroke will easily make 20 pounds of boost just above 1200 RPM when chipped. Granted, I know that the higher amount of fuel delivered equals heat which equals boost, so stock rigs (no chip) may be able to get away with no wastegate.
Not trying to tell anyone what to do with their rig, but I'd advise against disconnecting the wastegate actuator on a PSD......Cummins now, that's a different story.
Cody
Not trying to tell anyone what to do with their rig, but I'd advise against disconnecting the wastegate actuator on a PSD......Cummins now, that's a different story.
Cody
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From: Elverson, PA
Cleatus -
so how do you know it was the dis-activated wastegate that caused the new block window? is the truck stock except for this mod?
You can't just unplug the wastegate and then flip your chip up to 225 and drive it like you stole it. You need to watch your gauges (that hopefully you already have) and IMO you should be fine. As with most mods - you're taking a chance....
so how do you know it was the dis-activated wastegate that caused the new block window? is the truck stock except for this mod?
You can't just unplug the wastegate and then flip your chip up to 225 and drive it like you stole it. You need to watch your gauges (that hopefully you already have) and IMO you should be fine. As with most mods - you're taking a chance....
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Originally Posted by cleatus12r
Maybe I'm a little out of line here, but a Powerstroke diesel isn't exactly built to 'diesel standards' on the bottom end (Big Block Chevy-sized connecting rods come to mind). My cousin's '02 PSD chucked a rod because of over-boosting which resulted from disconnecting the wastegate actuator. The reason for a wastegate is to allow for a smaller tubine housing to build boost at low RPM and not allow overboost at higher RPM. Ever look at a 95-97 Powerstroke turbine housing? You'll notice NO WASTEGATE. (You'll also notice no low end boost.) A 95-97 has to be spinning at least 2500 RPM to make 15-18 lbs. of boost when equipped with a "quick turbo" housing and a chip. A 98-up Powerstroke will easily make 20 pounds of boost just above 1200 RPM when chipped. Granted, I know that the higher amount of fuel delivered equals heat which equals boost, so stock rigs (no chip) may be able to get away with no wastegate.
Not trying to tell anyone what to do with their rig, but I'd advise against disconnecting the wastegate actuator on a PSD......Cummins now, that's a different story.
Cody
Not trying to tell anyone what to do with their rig, but I'd advise against disconnecting the wastegate actuator on a PSD......Cummins now, that's a different story.
Cody
I appreciate the concern...........However, It really just comes down to common sense with any mods, and to have some understanding of whats going when you do them. With mine disconnected, I am only making about 26-27 psi at peak, well within an "acceptable range" for these trcuks. With it connected it makes about 24 psi peak.
I would also suspect that there is more going with that truck that blew, than just a disconnected wastegate acctuator.
Thanks again for the replys!
Eric
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