biggles

David,
Did you use any type of sealant on your head gasket; assuming you went ahead with the MLS. Are you using OEM head studs? I will be installing a MLS head gasket with some raceware studs some time this week and just wanted to get some insight.

Thanks!

biggles

wolfenstein

i usually flush with plain water, that is as long as the coolant came out clean, if not go to a napa and get some pro grade stuff-motorvac makes a good flush conditioner. FWIW i've been using blue oem volvo coolant

David Floyd

It is a modified stock panel, also have it ducted so the stock inlet feeds the bottom half of the intercooler and the cut header panel feeds the top half.

If c/r = compression ratio, then it's been a while, but it was 149/150 psi 1000 miles after build.

David Floyd

No sealant just clean and dry, reusing ARP's last torque to 90 ft lbs

David Floyd

Coolant was sort of dirty, Motorvac at NAPA will do

wolfenstein

if that's the case use a good flush followed by straight water, you might have to do straight H2O a few times till it comes back clear. then fill with a quality coolant. did you change it regulary?

zoltan944

Im under the impression that you want to feed the core of the IC. Ie duct around the entire perimiter so air flows through the center portions?
At least thats the way Audi has the idea. Just something to think about with all the efficiencey testing i read up a while back (ducting, fans, blah blah)

On another note, I hope you can keep this head and block together for a while! Lots of HG issues lately

David Floyd

Speak to me....

Some think if you vent the header panel you create an exit for air, not an inlet so I constructed a divider between the stock inlet and the cut header panel, so none of the air from the stock duct can excape thur the header panel if that's the case. The perimiter is sealed.

Then the hood is vented to help move air thru the intercooler and engine bay area.

David Floyd

The coolant in the car was 2 years old, the leaky headgasket cause contamination.

333pg333

I believe that if you have a front mount i/c you can block the radiator with the i/c so the vented nose panel should provide some airflow in from the top and hopefully be drawn through the hood vents. At least that's my theory. I can't see the vented header panel being an outlet. Too much air rushing in. There was a long thread on all this some time ago which a few of us expounded out theories and also came up with drawings. I'm pretty happy with the way I'll do mine and of course it can be tested too.