Engine/Transmission (1994 - 1998) 12v turbo upgrades

[KBurgoyne]

im looking for around 350 horses on my 95. nothing major just a turbo that could keep up with the extra fuel and keep the EGTs low while spooling quickly. i wouldnt mind upgrading to a 4in down pipe either. any advice is apreciated.

 

[hsmith]

I like my Super B, but there is a ton of choices out there. Someone of more knowledge will chime in for sure.

 

[KBurgoyne]

anybody using a BD perfomance elbow orifice. I'v heard you can get an extra 10lbs on the stock turbo for 30 bucks.

 

[snappy]

The factory turbo is good for 30 ish pounds of boost. If all you add is a boost elbow and then more fuel, enough for 350 hp, you might take that stock turbo out of its efficiency range. Hot air does not make power.

I like my Super B turbo. It will support your 350 hp goal and you'll need a 4 in downpipe.

 

[KBurgoyne]

the bd performance orifice is an upgrade to get more out of the stock turbo. BD-Power Performance Elbow Orifice 1040310

 

[snappy]

You will need fuel to make the hp. Anyone who has bought a cam/fueling plate new, well they come with a boost elbow. Adding a boost elbow is easy, but ya gotta have fuel to make power. I don't know if you have an auto or a standard trans. Add a 6 plate to a 95 manual trans, about 250 hp. Put in a set of governor springs and it is a nice combination. Start adding more fuel with injectors and things get hot and the factory clutch will not hold. Just adding a boost elbow without adding fuel is not going to accomplish much.

 

[charlessmith]

Just a fuel plate, a 'boost elbow', timing adjustment, and DDP2 injectors got me to 355 HP and 960 Ft/Lb. Right now I get to about 33-35 PSI boost. The dyno charts are before and after installing the DDP2 injectors.



I'm thinking about an ATS Aurora 3000 turbo. I understand it spools a bit quicker than my stock '96 and blows more air and can run up to 40 PSI.



More than that, I think I'll need ARP studs in the head.





This truck already has a Goerend upgraded 47RE with a tight Goerend torque converter.

 

[HEMI®Dart]

The best turbo I have ever had is a Industrial Injection Silver 62/14. Instant spool-up, low EGT's. It is probably overkill & $$ for your needs though.

 

[HEMI®Dart]

Charlie,



What would be the reason why I have more HP than your '96, but less torque?



'94 175HP pump 5 speed.

 

[charlessmith]

Charlie,

What would be the reason why I have more HP than your '96, but less torque?

Your peak torque has to be at a higher RPM than mine.

Horsepower is a function of torque at a specific RPM. They are related by this formula:
HP = TORQUE x RPM ÷ 5252

Using that formula to get RPM for my truck and yours gives:

Mine : 1950 RPM = 355 HP * 5252 / 960 Ft/Lb
Yours: 2450 RPM = 448 HP * 5252 / 942 Ft/Lb

There are many things that affect the engine speed where peak torque occurs.

 

[KBurgoyne]

higher RPM= more HP same torque. Some sled-pullers have HP and torque numbers that are almost equal cause they run the RPMs so high.



By the way i have an NV4500 with a 13. 5in heavy duty towing clutch 350 horses wont hurt it

 

[HEMI®Dart]

higher RPM= more HP same torque. Some sled-pullers have HP and torque numbers that are almost equal cause they run the RPMs so high.



By the way i have an NV4500 with a 13. 5in heavy duty towing clutch 350 horses wont hurt it

I have a 175hp pump also. I made 380 Hp way back. But it took a HX40, #5 plate slid forward. Timing @15°. Governor Springs. Diesel Dynamics stage 3 injectors (90hp over stock).



Thanks guys for the explanation on torque vs. RPM.