original fitment wastegate upgrade

[Rocco]

Hi guys, i need to buy a new wastegate and i would like to have something better than the original,but i would like to keep the original 4 bolt fitment.... if is possible because i really dont know if there is or not


if not i will have to try rebuild one of my spare wastegates

any suggestion?

[cooperquattro]

i would like an answer to this as it is very old now and i have had a failure before

i dont want to modify the downpipe either,so stock location and fitment

[Rocco]

i would like an answer to this as it is very old now and i have had a failure before

i dont want to modify the downpipe either,so stock location and fitment

i know more than the 50% os S2 with wastegates failures....i think it is normal as we have lots of kms done....and the things goes worse whem we have our cars mapped

[Rocco]

look this

http://www.034motorsport.com/engine-components-audi-i5-20vt-wastegate-tial-44mm-audi-20vt-drop-in-p-569.html

stock fitting points?

bigger and better ¡¡
could be an option....

[Bram]

that 034ms component looks to be a nice upgrade

[JP]

The restriction is still the hole in the exhaust manifold so flows only a tiny bit better than stock and mainly because the flexi.

Personally I'd buy a new diaphragm for the stock unit. Lot cheaper option.

[Jamo]

The 034 is a good option any vband wastegate can be made to fit with similar mods. I'd ditch the stock audi wastegate it really is old tech compared to modern wastegates

[Rocco]

The restriction is still the hole in the exhaust manifold so flows only a tiny bit better than stock and mainly because the flexi.

Personally I'd buy a new diaphragm for the stock unit. Lot cheaper option.

the problem is not the diaphragm....the problem is the wear inside the piston

[Jamo]

and the fact they don't seal

[europeanme]

The restriction is still the hole in the exhaust manifold so flows only a tiny bit better than stock and mainly because the flexi.

Personally I'd buy a new diaphragm for the stock unit. Lot cheaper option.

I've had a quick browse through your project pages and is this still the case or have I missed something?...

sorry for the hijack Rocco....

[JP]

Still case see pm.

The guides can wear on them which can be replaced. The valves and valves seats reprofiled and cleaned for improved flow and porting done on the exit port. Mines got 209,000miles on it functioning fine without guide replacement. Soon it will be going to a new home along with turbo and manifold.

The biggest issue with the stock unit is the 34mm manifold hole hoes down to a smaller hole inside the flexi which is directional and crucial its fitted the right way round.

[europeanme]

Still case see pm.

The guides can wear on them which can be replaced. The valves and valves seats reprofiled and cleaned for improved flow and porting done on the exit port. Mines got 209,000miles on it functioning fine without guide replacement. Soon it will be going to a new home along with turbo and manifold.

The biggest issue with the stock unit is the 34mm manifold hole hoes down to a smaller hole inside the flexi which is directional and crucial its fitted the right way round.

cheers for the PM....and your planning an even bigger turbo!!!...

[|Maku|]

The restriction is still the hole in the exhaust manifold ..

Anybody knows what size is Wagner's Evolution manifold wastegate outlet? Bigger than original? And original is 34 mm?

http://www.wagner-tuning.de/EN/products/abgasrs2.php

http://www.wagner-tuning.de/EN/products/abgasrs2T3.php

[Jamo]

The hole is 1.5 inches and I think from my experience it's poppycock that this is the restriction unless you are approaching 600 bhp even then bolt on a 40 or 44mm tial or turbosmart wastegate and you'd had no issues.

The restriction on a stock wastegate is the outlet flexi pipe. Remove that and replace it with a proper flexi and it will work a lot better.


Remember the wastegate is only to bypass gas for boost control, you make the outlet for the wastegate big you have problems with finite boost control hence the size is fine with a decent wastegate

[|Maku|]

The hole is 1.5 inches and I think from my experience it's poppycock that this is the restriction unless you are approaching 600 bhp even then bolt on a 40 or 44mm tial or turbosmart wastegate and you'd had no issues.

The restriction on a stock wastegate is the outlet flexi pipe. Remove that and replace it with a proper flexi and it will work a lot better.

1. So both original and Wagner's manifold wastegate outlet are 38 mm (1,5")?
2. What is original wastegate inlet and outlet diameter?
3. Is there a restriction inside of the wastegate (I mean maybe inlet and outlet are 38 mm but there's a bottleneck inside).
4. Original flexy goes down to what diameter inside?
5. Some say that original wastegate valve is 34 mm, so wastegate inlet and outlet is probably the same?
6. Also some say that original wastegate is 30 mm?

Damn, I have couple of them in my country place, so have to measure them.