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1. completed the spark plug change on both sides. I used the Bosch spark plugs as recommended by porsche, checked the gap to be 0.70 mm, and torqued them to 26 foot pounds. Just as an FYI, if anyone ever decides to change out the spark plugs on the 991.2 turbo, you will need to remove the rear bumper, remove the intercoolers, remove the heat shields around the exhaust (there are 4 screw caps 14 mm), remove the heat shield cover over the coils on the cylinder heads (2 screws that use torx female socket), remove the air in tube and housing from the turbo (2 torx screws male heads), disconnect the plug attached to it, and another bit of information, the passenger side is way easier!! this is a view of the passenger side after I removed the 3 coils:
passenger side is easier to get to plugs and more room, compared to drivers side
2. I flushed out the brake lines and replaced with the Porsche brand brake fluid oil from Pelican parts. I got out over 600 ml using a negative pressure brake bleeder.
old brake fluid.
now, I am on standby, the new Intercoolers are installed, as well as the IPD plenum and the IPD Y-pipe, however, I had to order this from FLat6, and called them several times to expedite the order, but no human being answers. I have also emailed them. the order is in, but will probably take one to two weeks to arrive.
be aware, if you ever replace the intercoolers and the Y-pipe, the hardware that comes with the AWE intercoolers are meant for the stock Y-pipe and not the IPD version upgrade. So order this part in advance, so you do not have to wait! like I am having to do right now
new intercoolers from AWE
Additionally, i have been told that the connection between the intercooler and the Y-pipe should be a silicon hose, not rubber. reason being is for temperature and pressure reasons. I spoke to the technician at AWE, and he told me the "boost pressure" in the tubing will be higher than that in a hot water coolant hose seen going to a radiator.
WHich to me does not make sense, since water pressure, especially hot water has pretty high pressure, cant believe that the water pressure when heated (200 degrees F) would be less than compressed air from an intercooler, when at most the boost is 10 to 15 PSI, which rarely happens, 15 PSI boost is real high, I believe.
Anyways, I will listen to them and I ordered the silicon one from Flat 6. I will wait.
You are doing a great job mitigating the issues and will have a good system when finished. I’m lazy and tend to buy complete systems like the DO88 so everything goes snick snick.
2. I flushed out the brake lines and replaced with the Porsche brand brake fluid oil from Pelican parts. I got out over 600 ml using a negative pressure brake bleeder.
old brake fluid.
Nice group of projects. When was the brake fluid last changed?
So all my projects are done, and today, I took her out for a spin.
so a recap:
this is what I did:
1. removed the rear bumper 2. removed the rear spoiler 3. removed the air filter and its housing 4. removed the throttle body and the plenum and the y-pipe 5. removed the intercoolers 6. I did a SOFTRONIC tune 7. i then replaced all 6 spark plugs, also checked the gaps on them 8. I changed the oil 9. I installed a new IPD plenum, then reattached the throttle body with the two connections and heard the clicks 10. i installed a new IPD Y-pipe 11. I installed brand new larger AWE intercoolers 12, installed new charge hoses/pipes minimum 2.5" ID from FLAT 6 with clamps that went from intercooler to the Y-pipe 13. then replaced the bumper and the spoiler.
14. I flushed the brake lines
i drove her on the Interstate and this is now a real beast. It is reading 19 pounds boost, which i had never seen before on this vehicle. I can feel it too. It is very fun and enjoyable.
A reminder to all that the scheduled interval for brake fluid is two years. Folks that track, obviously, change more frequently.
Three years at the most if you garage in a very dry climate.
And yes, I do our fleet at no more than that interval.
Originally Posted by orthobird
WHich to me does not make sense, since water pressure, especially hot water has pretty high pressure, cant believe that the water pressure when heated (200 degrees F) would be less than compressed air from an intercooler, when at most the boost is 10 to 15 PSI, which rarely happens, 15 PSI boost is real high, I believe.
The cooling system has a pressure relief valve that limits system pressure (to, probably 1 BAR, at least on classic Porsches, and I expect it’s the same for this century’s too.)
If it didn’t then all sorts of problems would happen like blown seals, cracked tanks, leaking heat exchangers, etc.
Impressive! I would have thought hot water/coolant in a radiator system would have much higher pressure than a turbo charger system. Guess thaat air is really being forced into the intake manifolds with a turbo. thus, the power from a small 3.8 liter motor.
07-05-2023, 09:23 AM
