Exhaust Manifold

[whiteVR6]

I agree. I really wish Anthony had made the changes independantly, so that it would have been more obvious where the increase came from. My bet is on the clutch (well lwfw to be exact) as the source of most of the power increase. I have backed up my mouth by ordering one through jmac. It is also cheaper than the manifold, well maybe, as it costs a bit to get it fitted. There has also been instances of the after market manifolds cracking, ask Mr Harding or H100vw.

Ive also seen standard manifolds crack. Seb has a turbo here that has a rather large crack in it as well. I'll get pictures up if anyone is interested.
ATP manifolds did crack on the earlier units. The later units are of a slightly different design.
Another thing to look out for is the tune and EGTs. If its constantly too high it will eventually crack the manifold and the turbo. Fitting a manifold like this will allow a better flow to the turbo with less bottlenecks which the standard manifold has. INA did some testing of manifold flow in this post: http://forums.vwvortex.com/zerothread?id=3397678
Its possible this could eliminate the loose turbo bolts plaguing the polo gti's.
As for power increases , around 5-10whp has been quotes on peak power:

http://forums.vwvortex.com/zerothread?id=2111240&page=2

[VWindahouse]

I agree. I really wish Anthony had made the changes independantly, so that it would have been more obvious where the increase came from. My bet is on the clutch (well lwfw to be exact) as the source of most of the power increase. I have backed up my mouth by ordering one through jmac. It is also cheaper than the manifold, well maybe, as it costs a bit to get it fitted. There has also been instances of the after market manifolds cracking, ask Mr Harding or H100vw.

Awesome stuff mate!! Congrats on the FW! Yeah I too wish I had done the mods seperately (but my wallet is happy I didn't ) but I wish I had a Dyno chart for all my mods! Oh well live and learn I guess. Anyway I can't wait for Jimmy's Dyno day to help with the discussion.

[VWindahouse]

Ive also seen standard manifolds crack. Seb has a turbo here that has a rather large crack in it as well. I'll get pictures up if anyone is interested.
ATP manifolds did crack on the earlier units. The later units are of a slightly different design.
Another thing to look out for is the tune and EGTs. If its constantly too high it will eventually crack the manifold and the turbo. Fitting a manifold like this will allow a better flow to the turbo with less bottlenecks which the standard manifold has. INA did some testing of manifold flow in this post: http://forums.vwvortex.com/zerothread?id=3397678
Its possible this could eliminate the loose turbo bolts plaguing the polo gti's.
As for power increases , around 5-10whp has been quotes on peak power:
http://forums.vwvortex.com/zerothread?id=2111240&page=2

Thanks Courtney, I feel better knowing both that the stock and aftermarket manifolds are prone to crack due to exccessive heat stresses and the new ATP mani is different and a better design. And I like the fact that Jiimmy had the insight to not only HPC coat the outside of my mani but the inside aswell heat is the enemy

[Jmac]

Ive also seen standard manifolds crack. Seb has a turbo here that has a rather large crack in it as well. I'll get pictures up if anyone is interested.
ATP manifolds did crack on the earlier units. The later units are of a slightly different design.
Another thing to look out for is the tune and EGTs. If its constantly too high it will eventually crack the manifold and the turbo. Fitting a manifold like this will allow a better flow to the turbo with less bottlenecks which the standard manifold has. INA did some testing of manifold flow in this post: http://forums.vwvortex.com/zerothread?id=3397678
Its possible this could eliminate the loose turbo bolts plaguing the polo gti's.
As for power increases , around 5-10whp has been quotes on peak power:
http://forums.vwvortex.com/zerothread?id=2111240&page=2

Agreed here, i have seen many manifolds cracked and they were standard, and a LOT are cracked around the wastegate which doesnt show up as the poppet normally covers it,and again regarding the Heat coating i truly think its gonna lessen the chance of the bolts coming loose, itll be worth keeping an eye on.Ive wirelocked them anyway but if they stretch then the wirelock wont stop that.EGT,EGT a biggie here.any of you guys that are coming to the dyno day please ask Troy or rick about EGTs, they have a Ute with standard internals and its off its guts mainly because they knock block tune it and keep the EGT s safe which again is down to the tuner, , encroach that then dice with major and very quick dramas.
Makes perfect sense with flow and scavenging IMo
My 2c
Jmac

[pogo_55]

Hey Jimmy,

If you have lowered the temp in the manifold, then isn't there going to be more heat in the turbo? If so then there is going to be a bigger temperature difference between the two and isn't this going to increase the chance of problems with the sealing between them, warping etc. Also isn't putting more heat into the turbo going to be detrimental to it's life expectancy. I honestly haven't got anything against changing the manifold, just keen to learn.

[Jmac]

Hey Jimmy,

If you have lowered the temp in the manifold, then isn't there going to be more heat in the turbo? If so then there is going to be a bigger temperature difference between the two and isn't this going to increase the chance of problems with the sealing between them, warping etc. Also isn't putting more heat into the turbo going to be detrimental to it's life expectancy. I honestly haven't got anything against changing the manifold, just keen to learn.

Not quite with you Kenny,if you heat coat the manifold then you keep the heat within the manifold thus increasing scavenging and flow and at the same time keeping engine bay temps down and surface temp down,at the end of the day thats how a turbo works its heat expansion,same as a turbofan engine, thats why you will get great boost going up hill when the engine is under load. a big question asked by many apprentices ive worked with is how come i dont get boost reading revving the engine up , how does the thing work??? Heat expansion.The hot expanding gas is where its at but to a safe level so that where its what is being combusted that makes it important,the tune, fuelling, we all know WOT lean is what we dont want. By the way if you go crazy you can heat coat the turbo inside and out too, and lots more. Sorry if my answer is a bit all over the place but i reckon more pros than cons
Jmac

[pogo_55]

Hi Jimmy,

What I was trying to say is that if the heat is kept inside the manifold won't the turbo be subjected to greater heat than it was before. As now most/any heat loss through the manifold has been removed. An example of this is from a cold start the manifold will not expand as quickly as the turbo potentially causing problems like warping. Probably just got too much time on my hands - back in the "homeland".

Cheers

Kenny