Engine/Transmission (1998.5 - 2002) Hx35 12cm

[pro99]

Hx35 12cm need more input!!



What do we really get when we buy a new turbo hybrid or modified? Is it replacing the pinwheel and bearing or what? I don’t want to spend $900 to $1200 on a new turbo when I can get the parts and put them in myself. I have a new hx35 turbo for a 99 24 valve. I want to replace the 12 housing and go with a 14 cm housing. The truck has 275 injectors, power max 3 with remote, 4 inch banks exhaust with banks 4-inch elbow, Scotty air ll, . Changing the pin wheel will give me back some low-end but not all of it but it will give me better mid and top end + lower egt’s. So can you replace the housing and pinwheel and will it survive? Has anyone done this?



I ALSO TOW A 9,000 LBS TRAILER



What do you all think about a non-wastegated 14 cm turbo housing? Why have a wastegated and knot to have one?

 

[LSMITH]

Honestly I would just leave it alone. Nothing you do to the HX35 will tame the EGT of your PM3. Keep the responsiveness of the 12 housing, and keep the wastegate.

 

[jwilliams3]

I agree with what Howard says.

You might as well buy a little ahead and go with a PDRhx40/16.



This turbo will give you near stock spool up, but when it does spool up hold on!! You will feel a big difference and your EGT's will be in check.



Or you can go the other route and get a PDRhx35/16 or hx35/14wg.

These turbos will flow a little more air.



If anything your 99's turbo is getting miles on it and could probably use a fresh rebuild or replacement.



Call Piers.



--Justin

 

[pro99]

HX35?

I also tow a 9,000 lbs trailer, should I go with a pdr hx40 16? Do they make a 16 waste gated housing though? Do I really need a waste gated housing? Does a hx40 16 really spoll up like a stock hx35? I really need to take one for a ride

 

[Lsfarm]

PDR HX 40-16

ProTurbo: I just drove a friend's truck which is virtually identical to mine. His has a PDR HX40-16, and mine is a PDR HY35 [the 'Nasty Nine'] .

There was very little difference in spool up time, since I was able to walk from truck to truck, I could detect a slight increase in lag or spool up time, but again, it is slight. About the same as a stock HX35-12 I believe.



The PDR HX40-16 is a 16 wastegated housing, and the tricks that Piers does to them makes a huge reduction in lag/spoolup time. Piers also balances everything and improves the oiling system. The stock HX40 has a poor reputation for longevity, the PDR turbos have a great rep.



I don't think that just bolting on a different pinwheel is a good idea without balancing and checking clearances, it would be a crapshoot whether it would hold together for long. JMO



Greg L The Noise Nazi

 

[Chipstien]

Are EGT's really an issue for you? Do you tow with the box all the way up? If not then you are probably fine though a 14 would help some. However if the like to play around with the box on high then by all means step up to the plate and get a HX-40. you will get more lag but it will drop your EGT's about 200 degrees across the board. Good luck.