How much boost can an ISB take?

[Texas Diesel]

All bombers, how much boost do you run (non o-ringedheads) and for how many miles.

Also please mention your engine type 12/24/ETH and if you have had any turbo failures (OEM turbos).



TIA

 

[KatDiesel]

Stock head gasket and last few turbos I run around 40 to 45lbs of boost. Depending on which turbo/which injectors are in the truck.



With my HX40 it was around 38psi... ... blew that up at the dragstrip.



with the PDR HX35 ran around 35psi.



with HY35 ran around 30psi.



2001 ETC 24v

 

[KLockliear]

2001 ETC, 35k on it now. Normally runs ~40psi, but been up to 52psi. Hasn't had an OEM turbo in about 34. 9k miles.

 

[curatchko]

HHhhhhhhhhhmmmmmmmmm... .



I can do about 42psi with the stock turbo... . and I normally get about 32 with the boost elbow for daily driving.



Am I going to have a problem with the turbo????

 

[esommer2500]

I can get 44psi out of my stock turbo, but don't like to because I know it is wayyyyyyy off of the map. I don't know how to mess with the wastegate, so I haven't tried to dial it down to where it should be. 101K miles.



Eric

 

[HVAC]

Single Turbo

Ran 48 psi for some time. Then I realized singles are limited. Twins are the way to goOo. Oo.

 

[Bigsaint]

I push my HO to 45 psi's most everyday, no problems yet but I plan on the o-ring fix when it eventually occurs. I'm no expert but I believe the longevity of the headgasket in relationship to boost really depends on how you build the boost. I like to ease into the boost and only do so when everything is nice and warm.



Scott W.

 

[COBRAJET]

I ran 38-40 for 60K miles on a stock turbo in a 01 H. O. Never had a problem. I purchased an HX40 from Piers and ran some BD 8's for about a month at 48-50psi..... 507 RWHP. The turbo lived... the head gasket left the planet twice in a two week period. I adjusted the wastegate to 45 and backed off on injectors and it worked great until I traded it. I don't believe the H. O. cares for more than 45... speaking from my own experience... . CJ

 

[J.R. Adkins]

With the hx35 and a 18 housing I could hit 46 psi. I did not loose the hg until I put twins on.



12v 145k





J. R.

 

[Chipstien]

57 psi with no problems yet. Over 40000 miles of 40+ psi.