i am about ready to get a 16cm housing, but i am wondering what a safe boost level is for my truck. already i can get to 33, it doesnt stay there very long, and with the addition of a smaller housing i know it should get more boost. what is the highest i can go before i should start to worry.

 

On average 45psi, but some head gaskets have gone at less than 20 and some of us have pushed 50+ without losing a stock head gasket. 45+ its just a matter of time.

 

Oh I guess I should turn mine down again. I am currently running mine at 45psi.

No problems yet??????????? Knock on wood.

Stomp

 

This winter I was seeing 41 PSI regularly. It is warming up now and Im around 39 PSI. I have 265 K miles, no problems here.

 

where does the H1C get out of it's map though? Stomp and frostie have big turbos....

 

32 or 36 cant remember, but I believe it is 32. maybe someone else can answer for sure.

Stomp

 

does that mean i have to turn mine down, i currently have 33 psi max, thats with my foot buried and it only holds for a few seconds

 

No, you don't have to turn it down.. After the 32# mark you start to have increases in EGT due to the drive pressure (pressure in the exhaust manifold) going up without a proportionate increase in boost. If you keep an eye glued to the EGT you will notice a nice steady climb then once you peak the boost out over 32ish psi, it goes up fairly quickly.

Typically if you have alot more fuel than turbo, its time to look at a different turbocharger.

J-eh

 

does that mean i have to turn mine down, i currently have 33 psi max, thats with my foot buried and it only holds for a few seconds


no, but the net result may be you may not really make any more power with more boost, and you might actually make about the same power with a few less psi

 

will the addition of a turbine housing and bhaf have a more positive or negative overall effect, right now i still have the stock intake and 18cm housing

 

Neither one will lower your boost any. The BHAF may help lower your EGT's, and if most of your driving is in local traffic the 16 cm housing will make the truck more fun to drive. Sounds like you've got a strong runner already.

EDIT: Have you thought about getting a wastegated housing instead of the 16?

 

i actually saw a wastegated hx35 for sale and i was wondering how this would do on my truck, i plan on adding injectors in the future and also an intercooler, would the hx35 off of a 2nd gen or 3rd gen be compatible with mine, and if so could i just switch the housing to whatever the recommended is for that turbo?

 

An HX-35 is an excellent swap. The older ones off 12 valve trucks will bolt right up, the newer ones have the exhaust elbow cast into the backplate so you'll need a different backplate or housing. And yes, all the housings that work with your H1C will work with the HX-35. The 12 cm housing that comes with the HX-35 is an excellent choice for a truck that is driven in traffic, spool-up is nearly instant. I love mine!

 

would you recommend i go with the waste gated or non wastegated version. im trying to save myself the money of a new housing if i can just get a different turbo, so i am asking as many questions as i can.

 

With the way your truck is set up right now, a stock HX-35 would be great. The stock housing is a 12 cm wastegated, that will be fine for now. As you add more fuel, you may find that you need a bigger housing (14 or 16 cm) to keep the EGT down at high RPM. You should be able to get a good used HX-35 for around $300.