Building 8500rpm "Big Port" 2.8 heads for my Audi 2.7T - Part 1
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- Опубліковано 25 чер 2024
- I'm building a set of 2.8 ATQ cylinder heads with big intake ports to use on my XSPower K04 Stage 3 2.7T motor. I'll be installing SuperTech upgraded valve springs with titanium retainers to be able to rev the motor out to 8500rpm. In this episode I talk about the differences between the port size of the heads, the differences in valve covers and exhaust valves, and then show you guys how to disassemble your cylinder heads. I also cut open a 2.8 exhaust valve and find a surprise, the internet lied to me again!
Next episode I'll complete assembling the fully built heads, stay tuned!
2.7T Build Off Challenge Playlist: • Audi 2.7T Build-Off Se...
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0:00 Overview of the B5
1:26 Port Size Differences
4:15 SuperTech Upgraded Valve Springs and Titanium Retainers
5:27 Disassembling
7:00 Valve Removal
13:08 Are the Valves Sodium Filled? - Авто та транспорт
This channel is underrated
Thanks man, support from guys like you drives us to keep making vids!
great work Sean, Keep the videos coming cheers
Thanks!
I don’t kno much about my 2.8 a4 b5. I’m planning on just swapping the engine to a 2.7 and use my a4 parts or just try to build the 2.8 engine. Your video did helps me understand more about the engine.
Nice!
The grooves for the keepers are at a different height on the 2.8 vs 2.7 valves. The 2.7 valves will have more pre load.😊
Yep! I talk about that in the next video in that series.
Good work man 👍deff subscribed. Coming from a b5 owner
Best engine ever ;)
Agreed!
One day I’ll take my b6 a part like that and rebuild it from chassis
It’s so nice to clean the dirt out from under all the heat shielding.
@@PBGarage
My car is rust free but still I want to take everything out sand blast the hole chassis and really rust proof the car my nightmare is the chassis going bad
I have them too. With supertech valves 🤙
They are nice hardware for sure and should rip at 9000 rpm!
I removed the lifters on my 1.8t head and forgot to mark the locations. So far 10k miles and no known issues. At the time I read it was more of an issue in v8’s and motors with very heavy springs compared to small displacement multivalve heads.
I’m thinking so too.
It also has to do with when reusing the same cams and lifters over is the wear. Each lobe wears each lifter different. So you want to put the same lifter back in the same spot with the same lobe it was on to begin with. The lifters and cam lobes do not wear evenly. Example: is like when one cam lobe wears off and none of the other do. Just for proof that they don't wear evenly. You can have a camshaft from the 2.7t engine have a lobe wear completely off. And all the others be perfectly fine. But that's the reason when you reuse lifters and cams on any engine they should be put back. It's not a total meltdown if they're changed. But it's very good practice to use the same spots.
Great content. These videos from the PG garage helped me rebuild my 2003 passat ATQ v6 engine. Do you happen to know the ring gap for the ATQ. i don't have the manual? Thanks
No idea unfortunately.
I personally agree with your logic on the lifter buckets. I recently replaced a head on my 2.7 and replaced valve seals, cleaned valves, and ultrasonic cleaned both my heads. I think if you’re taking it all out, cleaning, lapping, and the whole nine, it doesn’t really matter.
Have fun with those keepers 🤮🤮🤮
Keepers shouldn’t be a problem I have a set of tiny needle nose pliers that work well for placing them lol
I have long dental tweezers, short tweezers, needle nose players, etc, but what worked best was a small magnetic flathead. It’s the middle intake valve on each cylinder that was the big struggle for me. Eventually I got into a groove.
what does the sodium do? i know citroen did fill theirs with nitrogen back in the days (80's) to keep the colder
and nice vid's! doing a full rebuild on my 2000 s4 avant these days too
The sodium turns liquid when it’s hot, and then essentially sloshes around from the top of the valve to the bottom as it goes up and down, it picks up heat from the face of the valve and helps spread that heat out through the whole body of the valve so it can transfer to the head and oil, keeps the valve operating properly at high temps like in a boosted engine.
Toss up your insta handle so we can check out your Avant
Maybe I missed it, but what intake are you putting on it?
I know the valves from my experience are all sodium filled so that wasn’t really in question for me, but I thought I remembered the 2.7 valves loading the springs a little more than the 2.8. Did you take that into consideration for your final outcome?
I’ll be using the stock intake manifold, but just machining out the ports to match. Good call on the valve stem heights I will have to measure them.
In my experience the valves are the same height but the grooves for the valve keepers are a touch lower on the 2.7 to load the spring a bit more. May not be on all engines but worth a look, and consideration if they do end up being different on yours.
@@souly4him really good information there and will definitely compare them today when reassembling.
Say, where did you get that bracket to hold your heads?
I got mine on eBay but they're available a few places (like Amazon). Just search Cylinder Head Stand, Moroso makes a set, Sealey, the ones I have are SpeedFX.
www.ebay.ca/itm/324411421081
Hi! Nice work)
Can you tell me about supertech valves, how many km you use this? And how it’s work now? Don’t have any problems with valves? I ask because my friend use supertech valves on Subaru and it’s broken! He make new head and use new supertech valves kit and it’s again broke. After I start search UA-cam and find one more video with Subaru broken valves supertech😂 maybe it’s just Subaru😂. But I have same valves kit for 2.7 head and now so scare to install🥶 tell me please how your valves feeling now)?
Unfortunately the car hasn’t been run yet so I couldn’t tell you.
@@PBGarage okey just believe that is just Subaru😂
The lifters being soft or hard just means they aren't compressed with oil. But the lifters should go back in the same spots when using the same cams n lifters again.
It threw me off just because some had no resistance and some were still fully pumped up.
it might be too late but don't install them pumped up. I did that many years ago and fought low compression and misfires. even pulled the head off to change the headgasket.
Who makes the head stands?
They were SpeedFX, bought on eBay. But if you search cylinder head stand on Amazon you’ll get tons of hits. Moroso make a nice set.
Not worth cutting seats instead of lapping?
I’ve never done it and don’t have the tools.
do u still have ur platnum seats $$
I have them but they aren’t in great shape.
Part numbers for this build?!?!
The supertech valve kit is ST-SPRK-AUDI27T or was there something else you need?
@@PBGarage I was just wondering. The supertech website does not list the 2.8l heads on their website. I am going tk do this in the coming weeks. Great video.
I'd buy all new valves, the sodium filled valves are overrated, at least at minimum the exhaust valves...
I think unless you're going to inconel exhaust valves it's worth sticking with sodium filled. I've used plain new SS ones in a pinch for a low output motor but I have seen them hang up under tough conditions.