pdr hx 40- 18 psi of boost and high egts

[RFyfe]

i just installed a pdr hx40 with the 16 housing and i cant get more the 18-20 psi boost and my egts get hotter than with the stock hx35, that is just with stage 2 injectors> my truck is a 01 ho 6 speed with tst powermax 3 , dd2 injectors, 4 inch exhaust. So what gives. Throttle responce is the same or better than with the hx35 with dd2s. My smoke problem is reduced with comp box on, but not egts.

 

[Piers]

The problem is the boost is too low. You should be able to run that turbo at 36-38lbs of boost. Check to make sure you have no boost leaks & after you are sure there is none, either adjust the wastegate or install a turbo bleed orfice until you get your proper boost level. If you are having troubles or have any questions, please feel free to call me & I'll do my best to help you out.

 

[Fishin Guide]

The problem is the boost is too low. You should be able to run that turbo at 36-38lbs of boost. Check to make sure you have no boost leaks & after you are sure there is none, either adjust the wastegate or install a turbo bleed orfice until you get your proper boost level. If you are having troubles or have any questions, please feel free to call me & I'll do my best to help you out.

Or send it to me, I'll test it.



I'll put it with my Piers 14MM barbed banjo bolt.....



hint. . hint...



Dave

 

[RFyfe]

Ill go check for boost leaks again, but how do you agdjust the waste gate?

 

[jwilliams3]

Screw in an adjustable boost elbow.

I had this same problem with the same turbo many moons ago.

The restrictive boost elbow cured the problem.

 

[Piers]

Justin is right, a boost elbow is much easier to work with. Makes the adjustment process much easier, than setting the wastegate itself.

An easy way to make a boost leak tester. Buy a 4" sewer end cap, drill and tap it for an air fitting. Remove the air tube from your air box and install the end cap. Then apply about 20psi of regulated shop air to it and go around all the connections with a spray bottle of water and soap. This is a quick easy way to test the entire system for boost leaks. The only drawback is the turbo is spinning during this test, so you'll want to limit the test time to under a minute.

 

[Piers]

Dave, your 14mm banjo bolt is sitting on my desk. Come and get it anytime

 

[RAndrae]

boost

how does one raise boost with a non wastgated housing????

 

[Fishin Guide]

Dave, your 14mm banjo bolt is sitting on my desk. Come and get it anytime

Cool! I'll have Hoss or Mrs. Hoss grab it on the 1st Gen day!



BTW, PM me with I owe you.



Dave

 

[Fishin Guide]

how does one raise boost with a non wastgated housing????

Easy, add fuel!! Or restrict the outlet side of the compressor. Option 2 is just a joke BTW.



Unfortunately, you'll need either a housing with a wastegate or an external gate to adjust boost pressure. These will limit the upper end and will do little to add boost. A smaller wastegated housing would be the best of both worlds. Unless, of course, you need the flow of the larger housing.



What are your EGTs and boost?



Dave

 

[boydo]

Consider a "gated" waste gate controller, I have one from turbosmart and it keeps the waste gate closed until the desired boost is reached at which point it will fully open the watse gate to prevent over boost. The gains are that a standard waste gate like the one on a hx40 will start to open at 12-15 psi and be wide opan at 38 psi, spool up is greatly increase by keeping the waste gate totally closed until 38 psi. These are machanical controllers that cost around $80 but worth it. http://www.turbosmartusa.com/.

 

[RAndrae]

boost

I have a 96 with a #10 plate, 3000 GSK kit, PDR hx 35 and a non wastgated 16 housing. I set the plate about mid way. Excellent power but can reach and exceed 1300-1400- under a load up hill. I see about 26-28# boost max. The truck is drivable and egts are not a serious problem but when towing I have to really watch the EGT temps and position foot accordingly. Its to the point where I wouldn't trust anyone else to drive it. I am thinking of sliding the plate back or bigger turbo. Wish I could make what I have work without detuning.

 

[Fishin Guide]

I have a 96 with a #10 plate, 3000 GSK kit, PDR hx 35 and a non wastgated 16 housing. I set the plate about mid way. Excellent power but can reach and exceed 1300-1400- under a load up hill. I see about 26-28# boost max. The truck is drivable and egts are not a serious problem but when towing I have to really watch the EGT temps and position foot accordingly. Its to the point where I wouldn't trust anyone else to drive it. I am thinking of sliding the plate back or bigger turbo. Wish I could make what I have work without detuning.

Any idea what you are putting to the ground for power? Where is the EGTs an issue? On the upper end? Mid range?



If you are suffering out on top, about the only thing that will help is a larger charger. But if you are low on power for that housing, it will always be hot until it gets into the upper RPM range. And by then, the het from down low may be out of control.



So, in some cases a smaller wastegated housing will work wonders. In others, a bigger charger is required.



Dave

 

[Nick2]

or bump timing to cut egts up high, it's my next mod if I dont sell the truck.

 

[bmoeller]

i just installed a pdr hx40 with the 16 housing and i cant get more the 18-20 psi boost and my egts get hotter than with the stock hx35, that is just with stage 2 injectors> my truck is a 01 ho 6 speed with tst powermax 3 , dd2 injectors, 4 inch exhaust. So what gives. Throttle responce is the same or better than with the hx35 with dd2s. My smoke problem is reduced with comp box on, but not egts.

I installed my 40 when I only had the #10 as my only fueling mod. Bearings in the 35 didn't like the plate. I was getting a max boost of 20#. Was driveable, but very laggy if I hammered down right after the TCC locked up. The 370s helped quite a bit, but sliding the plate made the biggest difference. Gained more boost and my max EGTs came down 50*. Current mods, I see 40# and 1400*. The way I drive around most of the time, I usually see just 20-30# and 9-1200*.



Your cruise EGTs on the flat will be a bit higher, and the boost will be lower than with the stock charger. Stock I saw 5# and 5-600*. Now see 2-3# and 6-750*.

 

[RFyfe]

Well I went a stole the adjustable boost elbow off my hx35 and installed it on the 40, and now she spools. I got it to spool up to about 35psi, but my fuel pressure was suffering and so was my clutch :-laf . I think i can officially say the bombing has started, now its kinda getting expensive because I need a rasp and a clutch, and a timing box or mad ecm.