S3 8L Custom Exhaust Flow

Why would high power not have high egts.

All fepends on how far you push your hardware. At the time tuffty was aiming for 400 which was pushing his old turbo, hence his high egts
 
Mines been booked in for next year

I've had the miltek on for a little time now and it needs to go

Miltek good for 300-400 i say but not 500

I know i will see more gains from a custom 3 in + Pipewerx
 
darren t said:
i have seen a video of his dosent look like 510bhp dyno video is hard evidence without this i couldnt belive lol i hope it is pmsl as it looks like mine lol minus the gt30 turbo lol
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The only video of it on a dyno was years ago and it made just a tad over 300 bhp, It then made 440 bhp on its next visit but no video and that was on standard cams and a 0.63 hotside.

No dyno video of 500+bhp and if you want proof of it you will next years when i have made a few other modifications and you may see 600 bhp
 
ShaunS3 said:
No wonder its red hot....running 500+ bhp through a box made for relatively standard spec models. Talk about pushing the limits!

Personally if I was running over 500bhp, one of the first things I would do is have a custom exhaust system designed and built to cope with the power.

Don't think Milltek will suffer half as bad on a stage 1-2 sub 300bhp S3....
Click to expand...

Turbo does get a little now but its still flow quite well and revs very well for a 2.1 as i asked for it to be set at 7800, it could rev more if i wanted it to but not really advisable with the rod ratio i run
 
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darren t said:
that flat shift you have is it a wotbox?i bet the gear change is harsh!
Click to expand...

No WOT box, its all mapped into the OEM management

Only worth using Full throttle shifting when you hit the redline. I've only used it once since mapped and don't plan to use it that often as it can do a lot of damage, not that harsh when changing gear but very loud and big bangs as you get flames spitting a foot long out you exhaust.
 
Andrew@A.L.D said:
Miltek good for 300-400 i say but not 500
Click to expand...

I'm always going to be running less than 300 so I don't see any need to replace the Miltek rear box as it should be adequate enough to do the job without issues.....still a step up from an OEM box.
 
superkarl said:
Why would high power not have high egts.

All fepends on how far you push your hardware. At the time tuffty was aiming for 400 which was pushing his old turbo, hence his high egts
Click to expand...

Never said there's didn't have high EGT'S :s

''I CAN imagine EGT's being high on big powered applications such as tuffty's and Andrew's but for my low 'sensible' power spec I don't think I need to worry about extremely high EGT's to the point where it would become a problem''
 
ShaunS3 said:
Never said there's didn't have high EGT'S :s

''I CAN imagine EGT's being high on big powered applications such as tuffty's and Andrew's but for my low 'sensible' power spec I don't think I need to worry about extremely high EGT's to the point where it would become a problem''
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after 2 3 runs up and down through the gears on high boost ie 26psi on k04 your temps will rise if you parked it up and cut the engine it would just heat soak like a mofo worst thing too doo in my pinion if possible drive it round so air cools it down when coasting at high speed!!!afterall even on dyno they leave big fans blowing on engine too cool it theres no air when parked up just heats up the whole engine bay ect
 
No water meth yet as i have the AEM and not a fan of it really so looking for something better

Piper cams and they are well worth using and under rated. People rave on about how IE cam give you gains of 80 bhp on its street cams? but have you seen the spec of the engine they did the testing on? BT, head work, etc etc

If Piper did the same test with there cams on the same spec engine as IE i'm sure they would get good results
 
Andrew@A.L.D said:
No water meth yet as i have the AEM and not a fan of it really so looking for something better

Piper cams and they are well worth using and under rated. People rave on about how IE cam give you gains of 80 bhp on its street cams? but have you seen the spec of the engine they did the testing on? BT, head work, etc etc

If Piper did the same test with there cams on the same spec engine as IE i'm sure they would get good results
Click to expand...
who mapped in the antilag if you dont mind me asking
 
superkarl said:
Why would high power not have high egts.

All fepends on how far you push your hardware. At the time tuffty was aiming for 400 which was pushing his old turbo, hence his high egts
Click to expand...

My comparison....
K04, running 300bhp, all mods to achieve this - 920'c easily
GT30 running 300bhp, egt's 680-700'c

The overall flow is higher on the larger framed turbo, hotside, exhaust manifold etc.... lower egt's
turn it up and yea.... they will rise.... but thats the mapping... and hardware combo
 
badger5 said:
My comparison....
K04, running 300bhp, all mods to achieve this - 920'c easily
GT30 running 300bhp, egt's 680-700'c

The overall flow is higher on the larger framed turbo, hotside, exhaust manifold etc.... lower egt's
turn it up and yea.... they will rise.... but thats the mapping... and hardware combo
Click to expand...
just as i thought I have a race cat would removing this lower mt temps /do me any favours or do away with miltek a better option?/louder option
 
New everything lol hybrid stage 2 intercooler with 2.5inch pipe work massive intercooler 3inch inlet/outletsreduced too 2.5 3inch down pipe race bearings hbeam rods new rings max recorded air so far 224.5gs looking for 230???? Possible???intake 3inch aswell
 
darren t said:
New everything lol hybrid stage 2 intercooler with 2.5inch pipe work massive intercooler 3inch inlet/outletsreduced too 2.5 3inch down pipe race bearings hbeam rods new rings max recorded air so far 224.5gs looking for 230???? Possible???intake 3inch aswell
Click to expand...
obviusly mapped but not sure we're it who!!! But I know maps boost is asking for all its got lol no high knock 6 was my mak but waste gate wasn't opening/closing properly then and wasn't hitting requested boost sorted it all now though thanks too badger but now even before I turn up the boost and set wastegate properly clutch is slipping pmsl good in my eyes I know the power is there lol I have an uprated clutch and pressure plate but I have not done clutch before can do engine work but clutch I'm not familiar with at all how much labour would you s spect me too pay???
 
230 g/s isnt a great deal for a hybrid.
If its tuned sensibly your egts will be ok and i wouldnt imagine a cat or miltek affecting them. It took tuffty about 380hp to decide to go 3inch.
 
superkarl said:
230 g/s isnt a great deal for a hybrid.
If its tuned sensibly your egts will be ok and i wouldnt imagine a cat or miltek affecting them. It took tuffty about 380hp to decide to go 3inch.
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its only stage 2 so not much of a hybrid no rs6 wheel! tuffty get 380bhp on a k04???surely not? i can add more timing advance???i would like 300bhp on my k04 setup what would be your next mod im after tourqe really??? so large port head i have but using it for another build as i will loose a bit off acceleration but gain on top end from what ive read? what tweaks can i do everything is in good condition except my poor old clutch pmsl
 
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why all the work, when the manifold is the restriction?
i could be wrong but just seems like a lot of work for not a lot of gain
 
jezzy said:
why all the work, when the manifold is the restriction?
i could be wrong but just seems like a lot of work for not a lot of gain
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too be fair i owened a blue one lol y reg but had too sell i bought an a3 8p diesel 03 plate but swapped it for my 03 8l s3 as i just love them but unfortunatly i bent a con rod so rebuilt it and was offered a k04 hybrid at the right time so just put it all on lol im going big turbo on my garage build though low com pistons going vf35 choclate i know but it will last me a year of good racing i hope!!!!fast spool up is my aim longer gear ratios when i win lottery pmsl
 
Andrew@A.L.D said:
Going to a GT turbo or just a bigger turbo costs a lot more than you think
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hit that one on the nose !!!!!!!ive spent 3 grand easy and ill i have is 280bhp with a k04 obviously forged bottom end but thats a must if you love your s3!!!!obviously i can change turbo at any time without worrying about the rods at a later date!
 
jezzy said:
why all the work, when the manifold is the restriction?
i could be wrong but just seems like a lot of work for not a lot of gain
Click to expand...

The manifold's A restriction, rather than THE restriction, removing further restriction later in the system will still help with the overall flow by reducing the pressure after the turbo/manifold, which minimises the restriction the turbo/manifold's causing. Multiple restrictions will be worse than a single one, even if the first one is the greatest. Plus the OP explained that the exhaust needed work anyway to make it seal, might as well improve it while he's at it.


I'm running a single straight through backbox on my Scirocco, 3" downpipe into a 2.5" flexi section then straight pipe up to the rear axle, wobble over the axle then a single straight through 2.5" box and a 3" single tail-pipe. The volumes really not bad at all, the turbo does a lot of silencing for you, keep it under half throttle and about 3/4k and it's not intrusive at all in the cabin. No figures though as I'm still running a k03 and standard map, I did the exhaust preemptively for when I improve the rest of the spec, as I needed to make one anyway.

The system:

DSC_62542.jpg


Finished down-pipe (much less space than in an A3):

DSC_6268.jpg
 
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RobinJI said:
The manifold's A restriction, rather than THE restriction, removing further restriction later in the system will still help with the overall flow by reducing the pressure after the turbo/manifold, which minimises the restriction the turbo/manifold's causing. Multiple restrictions will be worse than a single one, even if the first one is the greatest. Plus the OP explained that the exhaust needed work anyway to make it seal, might as well improve it while he's at it.
Click to expand...

Absolutely spot on.
 
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