Engine/Transmission (1994 - 1998) stock turbo highest boost

[ndurbin]

What is the highest boost a stock turbo can reach on my 94? I've hit 26 with the pedal mashed to the floor at 100. But thats with a brand new Hoslet turbo with some kind of update.

 

[esommer2500]

I've been caught near 50 psi, but wouldn't recommend going over more than 40 or so. Play around with your wastegate and AFC and you should be able to get 35 if you have a plate.



Eric

 

[SOOT]

Anything over 35 is going out of its efficiency range. Loaded I can hit 33 with the stock plate in the stock spot, so you don't need a plate to max it out although it does make it get there faster

 

[Strick-9]

My '94 with minor pump work pushed 38 psi.

370 Injectors and much more pump work, pushed that to 48 psi. I wouldn't recommend running one like that all the time, but those are attainable.



Keep it somewhere around 30-35 psi or move to a larger turbo if you want more power.



-Chris

 

[C. Harlan]

Take Chris's (Strick-9) Advice... Dont go over 35... mine went KABOOM at 49... We all live and learn. . when I grenaded that turbo, I got the BOMBing bug. Bad. Oh well!



-Chris-

 

[Jff24Gordn]

I got to 50 once on a cool night, can usually get to 48.

 

[onestackdram]

I can hit 36 easily and 42 smashin on her hard. But I also have an ex. housing so the turbo is not truely stock I guess.



Russell

 

[Jim Fulmer]

I have a 97' 5 Speed at 40 psi with the 35/12, we are adding a 16 housing and water/meth and we'll see what we can get out of a stock turbo'd truck, right now it's at 370/900 and plasma torch temps with minimal money spent, Perfect test bed for Water Injection.



Jim

 

[Hammer]

Ok...

I have one question here...

Since we all know that running a HX35/12 over 35lbs of boost runs it out of its map range why do it???. You don't stand to gain anything but overheated air and a chance to spank the turbo like Charlan did.



So to answer his question as others have above gate it at no more than 35lbs and be safe or change the turbo. Choose your wheel wisely as not all the larger ones are efficent in higher boost ranges... ... ... . Andy