Waste gate questions

[MMiller]

I'm brand new to having a waste gated turbo on my truck. It is a Super 40 with a 16 cm gated housing. The original waste gate actuator would not work in my application. I pulled the mount and actuator off of a stock 24 valve turbo. When I acclerate from a start, or from 0 boost, in 3rd, 4th, and 5th gear I can achieve 33 psi of boost. I did notice hooked to the trailer when the truck and trailer was already rolling along, and the power was rolled on for a hill, and the throttle went to WOT most of the time the boost would only read about 25 psi.

I don't know when the gate opens. I'm going to try and check this week. Why does it do this? Is this normal? Should it go to 33 psi whenever it gets WOT and enough load? I never have experianced this before.

Michael

[bgilbert]

I'm no WG guru, but I'm thinking maybe you're out of fuel/pressure/volume after you're rolling along and ask the pump/engine to get with it as you roll into the throttle prior to the hill. From 0 boost to wide open in those gears your lift pump/system is keeping up. But under load, it trying to keep up/support 65mph, then all of a sudden, throttle goes wide open, it falls on it's face faster, drops to zero psi faster, hence producing less output power, now 25psi vs. 33psi... just my theory.. KTA had a stock lift pump on his towing rig, maybe he can give some ideas.

Or maybe it's a wastegate thing .

[KTA]

Unless you have a sticking wastegate you should obtain the same boost numbers empty or loaded. This is of course dependent on turning the same rpm's and the same fueling. Boost is RPM related so you might not see as much boost loaded say at 1600rpm WOT as you would at 3200 rpm WOT.

[Philip]

Michael

I was wodering if there was going to be a problem with the WG acuator. I had been looking at mine and wondering. It looks like it might hit the frame in normal install position.

[MMiller]

I could not get the housings oriented correctly with the actuator that came on the charger. I need to get some pics for you don' I?

Michael

[bgilbert]

Here's something I can say good about PDR, well, from what I've read, the PDR40 comes with an actuator that fits the Dodge application. What's the deal with Holset building something for the Dodge, the Super40, and it not fitting....? Maybe it fits the 24valve .

[MMiller]

I won't comment on weather or not the actuator that was on it was from Holset or not, or weather it was original from ADS. This Super 40 was mounted on a PPumped motor with another turbo. It was ran for a little while, and the owner was talked into trying a Phat Shaft turbo instead of the 40. Promised better running, better spoolup, etc, and he said it made absolutely no change in performance. He just left the PS in instead of swapping again.

The previous owner of this turbo runs a repair shop, and does a lot of diesel performance stuff. This was on his dyno queen, play toy, smoke machine.

[Philip]

Michael if yours had problems I bet mine will to. Some pic's would be nice.

OOOHHHH Bill when you going shoping agin.

[bgilbert]

OOOHHHH Bill when you going shoping agin.

I might go this Saturday. It's been awhile since I've gone. Anything in particular you're looking for, WG actuator? Course the ones I might encounter probly would be the same as what Michael has...

[flashgordon]

Usually the Wh1c and 35s that were install on 94 and up (actuator bolted to the compressor housing) is a different drain tube so that rod would clear.........Don't now if the is the same waste gate rod in question above on a 40????

Maybe it was the 24V's that had the wast gate bolted to the compressor.......now i thing about it for a minute.



Flash

[PToombs]

I have an HX-35 sitting here that the actuator bolts to the compressor housing. It's off an '01.
Hope this helps.