Engine/Transmission (1998.5 - 2002) safe boost

[LKrueger]

what is safe boost pressure for a stock engine? my 02 HO w/dd2's and a comp-as a EZ gets at least close to 40psi (easily pegs my 35 lb guage)whats others running with no head gasket problems?? thanks for any input. Luke

 

[RJPotts]

I've seen and heard of people getting to 45 psi with no problems, I wouldn't say anything over that for extended periods of time is safe though.

 

[EGaskamp]

On my 12v it was running 50 psi, but I rarley ever pushed it there. I ran 45psi for a long time with no problem. On my 24v I'm running around 42psi. I wouldn't push it over 45 though. In the long run it couldn't be good for it unless you did some head work. IMHO anything over 45psi I wouldn't do. I'd say you're doing just fine. Good luck.



Eric

 

[darkhorse]

what is safe boost pressure for a stock engine? my 02 HO w/dd2's and a comp-as a EZ gets at least close to 40psi (easily pegs my 35 lb guage)whats others running with no head gasket problems?? thanks for any input. Luke

The standard HX35 has been safely pushed to around 50 psi, but there is little point as you lose efficiency past 35 psi. Past that point the air is heated excessively. I'd suggest setting your wastegate at 35 psi.

 

[EGaskamp]

If you upgrade turbos, can you run more psi more efficiantly? Without it getting hot? Say like an HTB2

 

[FTwardoch]

The standard HX35 has been safely pushed to around 50 psi, but there is little point as you lose efficiency past 35 psi. Past that point the air is heated excessively. I'd suggest setting your wastegate at 35 psi.

How do you 'set your wastegate'?

 

[Jetpilot]

As stated above anything over 35psi is a waste, and in fact hurting more than helping... . On the issue of max boost I have seen stock headgaskets pushed to over 65 psi on an ETC truck and I have seen then blow just above 40 psi on an ETC truck. Yours being an ETH is more prone to headgasket problems. You could get an adjustable boost elbo and use it to set max boost.



Doug

 

[DLeonhard]

I have pushed mine to 58 psi. I wouldn't recommend doing that too often - but so far I haven't had a problem (I am knocking on wood right now!!) I am in the process of getting my head O-ringed and studded as we speak.



Doug

 

[DLausche]

How do you 'set your wastegate'?

Same question here. How is this done? I understand an adjustable boost elbow is needed. Is it just then just a matter of trying and adjusting until it it set at the desired point? Under which type of load does one test the max psi for best results?



Anything to look for or avoid in an adjustable boost elbow? I'm not sure where best to get one from.



-Deon

 

[darkhorse]

Anything to look for or avoid in an adjustable boost elbow? I'm not sure where best to get one from.



-Deon[/QUOTE]





Go to the classified ads on this site & put "Don Troxell" in the search window. He sells a nicely made adjustable elbow for $15. 00.

 

[DTroy]

I ran 44 briefly. Now it's set for 35. I bought a boost controller from Turbo XS.



Find a hill and floor it. Keep turning it up until it's where you like it.



(for those of us with the rubber hose going to the wastegate actuator)

 

[PC12Driver]

My wastegate is set for 38-40psi, and it was happy until the temps dropped in the winter. It popped at 38psi when the temps were 15F. I guess the cold air causes the timing to advance a little much. Engine was at operating temp, btw.

 

[JBlock]

Peir's recommend a maximum of 35 psi when he trick out my HX35.

 

[JBlock]

What Popped??

My wastegate is set for 38-40psi, and it was happy until the temps dropped in the winter. It popped at 38psi when the temps were 15F. I guess the cold air causes the timing to advance a little much. Engine was at operating temp, btw.

The turbo break or the engine.

 

[PC12Driver]

Oops, got a bit distracted while writing that one. My headgasket let loose. Blew through one of the front oil passages and was pumping oil out right behind the fan. My first indication was my voltmeter dropping to zero after the alternator got soaked with engine oil.

 

[DieselMinded]

What about the AUTO's Ive been close to 50PSI sounds really cool and scary at the same time



I have a turnbuckle on tightened all the way up



they say the stocker is Wg'ed @ 35



if so Why Do I need a Turnbuckle ??



To my understanding the stock turbo thats on the auto already has a adjustment its just a pain to adjust



right now Im running 3x4 and when Im WOT I feather it around 35 if I keep in to it,,,, it will go past 40psi easy



when Im in 5x5 it will go to 50psi



I try not to do that



if I took off my TB I wouldnt have to worry about it



what should I do ??



DM

 

[SteveFarley]

I am going to guess I have been luck I have twins and run mine atleast 3 times a week to 60 PSI it is wastegated at 58 but it blows past it sometimes to 60 then drops after a while.

 

[Beast2B]

No stock turbo wastegate is set to 35#. The computer would set an overboost code every time you drove it. Stock wastegates are set around 20#. Take the turnbuckle off and run it! With your mods it will go higher than stock, but not too much. I have a manual trans, so I'm not the HY35 expert, but can't you loosen the turnbuckle a bit to get SOME bypass?

Any of you with the stock turbos could prove this by dynoing with the stock elbow or linkage and then no wastegate and then with adjusted wastegate. Every turbo has a max effective range at which point the turbo is just creating more heat and LOSING HP!

Search wastegate and do some reading, it's interesting.

 

[darkhorse]

What about the AUTO's Ive been close to 50PSI sounds really cool and scary at the same time



I have a turnbuckle on tightened all the way up



they say the stocker is Wg'ed @ 35



if so Why Do I need a Turnbuckle ??



To my understanding the stock turbo thats on the auto already has a adjustment its just a pain to adjust



right now Im running 3x4 and when Im WOT I feather it around 35 if I keep in to it,,,, it will go past 40psi easy



when Im in 5x5 it will go to 50psi



I try not to do that



if I took off my TB I wouldnt have to worry about it



what should I do ??



DM

This is right from DodgeRam. info site:





Model 2001-2002 Ram Diesel Turbocharger Specifications



ISB ETC 235 HP Automatic

Max Boost 20. 8 psi Typical WOT Boost 18 psi Holset HY35W 9 sq cm (or 10 cm2 depending on how it is measured) turbine housing



So if you remove your turn buckle you would only get about 18 psi. If you play with the adjustment, you should be able to find a spot that will max out at 35 psi & hold it there at WOT.

 

[DieselMinded]

Thanks



Im going to remove my TB I wonder why I ever put it on ???



You guys are a bad influence













Anybody need a TB there a great idea !?





DM