Typically, 84 PSI is too much. The most power in the 24 Valve is made in or around 70 PSI MAX with the class turbos you are running.

Air that is higher in pressure is, as a rule, higher in temperature. The balancing act is to get the density high, while watching the air temps. The air ( oxidizer ) needed to crack/burn the fuel parcels is what makes the added power. If the air temps are too high, the balance tips toward the negative and less boost ( pressure ) can have a higher number of oxidizers per cycle.

Don~

 

Thank you for the typing error, sorry.
No I meant 65psi for a O-ringed head, there is a difference. I do both O-rings and fire rings at the shop, but when I show the wire for a O-ring job and the actual fire ring and gasket to customers they tend to go with the fire ring, I have yet to do a O-ring job on a truck, the wrapping is still on the wire. I wouldn't recomend running 84psi with just an O-ringed head. Just stating my .02 cents thats all.
I do know of one truck that he cut O-rings in and with his twins he is making 57psi and so far has no problems. Just not my prefered method, as rule of thumb seems to go with some people, they seem to always want more.....

The twin set ups that I have been building using a PDR40 and a HT3B have been right around 67 to 70 psi. So I feel a little safer offering the fire ring.

 

still want to know how carbon builds up in the intercooler...

 

What about the pumps???

 

the pumps? meaning air pumps/turbos? would this be a result of oil bypassing the seals on the shafts of the turbo/s?

i've never heard of carbon buildup in the intercooler, just wondering its causes...

TIA

 

What exactly do the fire rings look like? I am under the impression that they are a C-shaped ring that has the open end of the "c" is facing in, am I correct?

 

the pumps? meaning air pumps/turbos?

 

No they are a solid steel round ring, that you cut grooves for in the block and head. The gasket you get has the fire ring, (the metal ring on a original head gasket) removed, and you use the round seemless ring in its place.

 

my old turbo before i put the twins on were shot and leaked oil like it was cool........im not totally sure if it was carbon buildup or a buildup of oil with some carbon look to it but it was black, nasty, and it had to be cleaned

 

 

So it is basically just a larger steel version of an o-ring? I know the o rings use the regular version of the HG. How are the o-rings better than stock? I know they can work but I don't understand why.

 

just so yall know this was a one time try to see what she dish out... im running 48 psi daily driven......

 

I want to see pictures of the twins, show them off dude!

 

how far is rural hill from me?.....im always traveling so maybe i can show you in person

 

Actually, I'll be in your neck of the woods this weekend. I'm heading home to New Bern to see my folks. We could meet some where and talk diesel. Are you a memeber of the NC chapter yet?