BOOST?

[Lord Tauk]

Im curious, what kind of boost pressures are you guys seeing with your mods? Looking for the more modded guys really. 7.3s or 6.0s. Preferably 7.3s.

I know the factory turbo on stock +99 7.3s is no more than around 21PSI but no less than 15PSI at WOT, that sound about right?

Im curious with aftermarket turbos with just about every supporting mod for performance with or without propane/methanol/or nitrous, how much boost is too much on the factory longblock?

 

[Race22]

With WOT, I see about 32#s of boost with my mods.

 

[roosterdiesel]

I see 26-27 at about 3000 rpms at WOT with the 1.0 exhaust housing. I think I would hit a couple more pounds if I put the later model wheel back in.


The stock thrust bearing is rated for 25psi, but the turbo is capable of 30+. It just takes enough fuel and some wastegate adjustment or a Banks Bighead Actuator.


As of the moment there are only 2 bolt on aftermarket turbos. Both capable of 40psi. After 40psi head studs are required! If you have forged rods, people have produced 450-500hp monsters with good tuning and made them live.

 

[whatabudro]

32lbs, my turbo will safely take 40lbs.

 

[jopes]

As of the moment there are only 2 bolt on aftermarket turbos. Both capable of 40psi. After 40psi head studs are required! If you have forged rods, people have produced 450-500hp monsters with good tuning and made them live.

40 psi? man thats alot of intake pressure.

 

[roosterdiesel]

40 psi? man thats alot of intake pressure.

All it takes is enough fuel and deep pockets for supporting mods!

 

[Hoss 350]

Im curious, what kind of boost pressures are you guys seeing with your mods? Looking for the more modded guys really. 7.3s or 6.0s. Preferably 7.3s.

I know the factory turbo on stock +99 7.3s is no more than around 21PSI but no less than 15PSI at WOT, that sound about right?

Im curious with aftermarket turbos with just about every supporting mod for performance with or without propane/methanol/or nitrous, how much boost is too much on the factory longblock?

With my Juice on 75 horse I'll see 26. The redline for the stock turbo is 25. I do not have a MAP blowoff, so at about 25.5, it defuels, so I'm convinced that is why I cannot see any more than 26 lbs. Probably could go more if I was worried about it, but I kind of like my turbo.....

 

[dzl_x_4x4]

I have a dual relief valve, but I would set the SES without it. I think it set the SES and defuels around 25psi.

DZL_X_4x4

 

[Tail_Gunner]

With my Stage 1 single shots, DP-Tuner 80 Econo-tune and tiny early 99 turbo, I've been seeing 28 to 30 depending on outside temp & baro pressure.

 

[KansasDiesel]

Before my stock turbo was trashed, I could hit 32psi with no problems on the EXTREME Tony burn.
With the new stock turbo I have the chip set to tow and it limits the turbo to about 25 psi and the CEL stays off.