K03 to K04 upgrade - Options and thoughts

[ljc19630]

OK, this may be an issue I won't know about till I get the BYD engine?. Are these the runner flaps behind the intake manifold, that are cleaned when R-Tec do their walnut shell blasting? If they do need changing, will the car run, and sufficiently for me to get to R-Tech as they will map for ma and I'll also get an injector service and walnut shell blast clean, hence runner flaps will be removed and cleaned. OR do I just get the ECU & Loom from the ED30 engine as one comes with and the other without, but can be supplied? The transplant isn't a concern as my son's mate is a top-notch Audi tech, but i want to try and avoid any running issues post-transplant and getting it from West Sussex to Hinkley!!!

Cheers
Louie

[muff1991]

yes, those are the flaps in chats. tbh if i had to take a guess, i would say.. yours is a Letter runner flap motor, and the BYD will probs also be a letter so i don't think you'll have any issue. my cousin didn't, and he went from BWA to BYD. maybe diff for yours as his was an 06 and yours is an 05 or 55 i cant remember. i think it might be more of the AXX that had NO letter on. i could be wrong, but whatever the case, i don't think you'd be in too much trouble if you run the original motor with the original ECU on the new BYD. i'd have thought you'll be ok and get to R-tech fine. its the ECU config with the motor not the engine. so don't panic on this too much.

[ljc19630]

Thanks bro.
Mines a May 2008 car so hopefully be ok. I’ve gone for the more expensive engine as didn’t feel comfortable with the replies I was getting from the other bod with the cheaper unit. Just hit him with a nice low offer, so the haggling begins.
Know anyone selling an OEM S3 8P I/C??

Cheers
Louie


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[muff1991]

ahh, sorry bro.. not sure why i had 05/55 in my head lol nice one.. hit them low and hope for the best! I believe this intercooler is a good alternative and been mentioned on here before:
https://www.darksidedevelopments.co.uk/products/darkside-audi-s3-intercooler-with-alloy-end-tanks-for-mk5-mk6-platform.html
or, if your mate still works at Audi, ask him to get you one (the complete Ally one) on his discount which will work out around the same price.

My cousin went for the below intercooler and to be honest, it's really not bad at all and does the job perfectly:
https://www.ebay.co.uk/itm/NEW-LARGE-UPGRADED-ALLOY-FRONT-MOUNT-INTERCOOLER-KIT-FOR-AUDI-A3-VW-GOLF-PASSAT/322634310826?fits=Car+Make%3AAudi%7CCars+Type%3AS3+quattro&hash=item4b1e80e4aa:g:JKoAAOSw2n5ZhJtc

Oh, and i think this may be the same as the Darkside one without the name:
https://www.ebay.co.uk/itm/NEW-INTERCOOLER-AUDI-A3-S3-8P-2-0-TFSI-PETROL-2003-2011-1K0145803P/183294023282?hash=item2aad2cd672:g:-LYAAOSwSzpbM4NE

[ljc19630]

No worries bud
They are the 3 I have sat in my eBay basket!!! Angling towards the cheaper one to be honest as if ya cousin has used then it may suffice. Did he convert to BYD?
Still no reply from the engine seller so will sit right as in no rush


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[muff1991]

No worries bud
They are the 3 I have sat in my eBay basket!!! Angling towards the cheaper one to be honest as if ya cousin has used then it may suffice. Did he convert to BYD?
Still no reply from the engine seller so will sit right as in no rush


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yes mate, converted to a BYD after his BWA give way. and his £200 ebay cooler is sweet! maybe not to everyone's approval on here but he's more than happy with it.

[ljc19630]

Ok brill What power he running??


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[muff1991]

around 380 

[ljc19630]

Ooooh ok that’s it then
£199 I/C will be ordered, but will use a set of Creation Motorsport Hard popes as below I think??




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[ljc19630]

Chaps
Still haggling re the engine, but the guy is playing hardball
Anyway i shall keep at it as ideally want a complete engine

Quick Question - For those who have converted to BYD or are running BYD with R-Tech STG2+ is this the correct 200 Bar Fuel Pressure Sensor i need??

https://www.akstuning.co.uk/genuine-oem-parts/375-fuel-pressure-sensor-for-20-tsi-and-fsi.html

[pudding]

Bear in mind the CDL engine from the Golf 6 R, 8P Audi S3 and Scirocco R is another option if BYD specific engines are scarce.

You don't need an 8P S3 intercooler specifically, the 6R one will work as well.

If I were you, I would just do an OEM K04 swap and not worry about aftermarket parts until you've established a reliable conversion and power baseline.

A completely stock K04 can shove about 400lbft torque worth of pressure into the cylinders (something the BWA/AXX can't sustain for long) with around 350hp.  Rising to 370ish hp with a good intake and exhaust.  Ignore 400hp+ figures, it's pure fantasy land. 

You will find that is plenty on rural roads, well, actually is way more than the chassis can handle so you might want to look at the brakes and suspension as well.

If that doesn't float your boat, no amount of further tweaking will satisfy you.  You'll be needing a different car or TTRS engine swap 

[ljc19630]

Bear in mind the CDL engine from the Golf 6 R, 8P Audi S3 and Scirocco R is another option if BYD specific engines are scarce.

You don't need an 8P S3 intercooler specifically, the 6R one will work as well.

If I were you, I would just do an OEM K04 swap and not worry about aftermarket parts until you've established a reliable conversion and power baseline.

A completely stock K04 can shove about 400lbft torque worth of pressure into the cylinders (something the BWA/AXX can't sustain for long) with around 350hp.  Rising to 370ish hp with a good intake and exhaust.  Ignore 400hp+ figures, it's pure fantasy land. 

You will find that is plenty on rural roads, well, actually is way more than the chassis can handle so you might want to look at the brakes and suspension as well.

If that doesn't float your boat, no amount of further tweaking will satisfy you.  You'll be needing a different car or TTRS engine swap 

Hi pudding/
I didn't know the CDL engine from the Golf 6 R, 8P Audi S3, and Scirocco R will fit? Is this just a case of searching for a CDL engine?

[pudding]

Bear in mind the CDL engine from the Golf 6 R, 8P Audi S3 and Scirocco R is another option if BYD specific engines are scarce.

You don't need an 8P S3 intercooler specifically, the 6R one will work as well.

If I were you, I would just do an OEM K04 swap and not worry about aftermarket parts until you've established a reliable conversion and power baseline.

A completely stock K04 can shove about 400lbft torque worth of pressure into the cylinders (something the BWA/AXX can't sustain for long) with around 350hp.  Rising to 370ish hp with a good intake and exhaust.  Ignore 400hp+ figures, it's pure fantasy land. 

You will find that is plenty on rural roads, well, actually is way more than the chassis can handle so you might want to look at the brakes and suspension as well.

If that doesn't float your boat, no amount of further tweaking will satisfy you.  You'll be needing a different car or TTRS engine swap 

Hi pudding/
I didn't know the CDL engine from the Golf 6 R, 8P Audi S3, and Scirocco R will fit? Is this just a case of searching for a CDL engine?

Yup, it's the strongest EA113 engine VW made.  It's a CDL in the S3 and 6R (iirc) but may be a different code in the Scirocco, but it's the same unit.   Maybe try a search for Audi 8P S3, Golf 6R & Scirocco R engine (pre 2012.  The CDL is a bit of a legend in EA113 tuning circles, so be wary of chancers asking stupid money for ropey engines.  A brand new CDL from VW/TPS is £4K, so don't pay anything silly for a used one.

Your GTI ECU and loom will work with a BYD or CDL, but the software will need changing over to the K04 specific settings 

Sorry to hear about your AMG theft.  So annoying and invasive. My mate had his A45 AMG nicked, bloody thieving sods.  It's good to hear you hold the humble old GTI in such high regard though 

[pudding]

Basically, AXX, BWA, CDL, BYD etc......are all the same basic unit.  The only physical difference is the compression ratio, cam profiles, piston and bearing type and injector and turbo sizing.  Everything else is pretty much the same.

The EA888 from the MK7 will drop straight into a MK5 as well......but with a few electrical headaches to contend with. 

[ljc19630]

Bear in mind the CDL engine from the Golf 6 R, 8P Audi S3 and Scirocco R is another option if BYD specific engines are scarce.

You don't need an 8P S3 intercooler specifically, the 6R one will work as well.

If I were you, I would just do an OEM K04 swap and not worry about aftermarket parts until you've established a reliable conversion and power baseline.

A completely stock K04 can shove about 400lbft torque worth of pressure into the cylinders (something the BWA/AXX can't sustain for long) with around 350hp.  Rising to 370ish hp with a good intake and exhaust.  Ignore 400hp+ figures, it's pure fantasy land. 

You will find that is plenty on rural roads, well, actually is way more than the chassis can handle so you might want to look at the brakes and suspension as well.

If that doesn't float your boat, no amount of further tweaking will satisfy you.  You'll be needing a different car or TTRS engine swap 

Hi pudding/
I didn't know the CDL engine from the Golf 6 R, 8P Audi S3, and Scirocco R will fit? Is this just a case of searching for a CDL engine?

Yup, it's the strongest EA113 engine VW made.  It's a CDL in the S3 and 6R (iirc) but may be a different code in the Scirocco, but it's the same unit.   Maybe try a search for Audi 8P S3, Golf 6R & Scirocco R engine (pre 2012.  The CDL is a bit of a legend in EA113 tuning circles, so be wary of chancers asking stupid money for ropey engines.  A brand new CDL from VW/TPS is £4K, so don't pay anything silly for a used one.

Your GTI ECU and loom will work with a BYD or CDL, but the software will need changing over to the K04 specific settings 

Sorry to hear about your AMG theft.  So annoying and invasive. My mate had his A45 AMG nicked, bloody thieving sods.  It's good to hear you hold the humble old GTI in such high regard though 

On mate, you're a star! :congrats:I honestly just thought the BYD lump would fit. That gives me LOADS more options and opportunity to find a low mileage engine. 
So i guess if i get an engine complete with ECU/Loom its a straight swap? My preferred option to be honest, as then can get it to R-tech for mapping etc. Yeah the AMG being stolen was a real upset, but fortunately, I've got GAP cover. The insurance company have been great and I had an initial offer today, but declined this as the GAP company will now take over the negotiations as they have a 9k shortfall to cover as I'll get the full invoice price i paid, which is i guess a consolation to all this. I love the GTi. I think driving an 800hp monster is great, but if i am honest, my GTi is compared to the best hatchback & car for driveability and fun i have owned FocusRS Mk1 - That car i compare all my cars too, and to date, the GTi is on par. Admittedly at 132k its needing suspension/bushes etc replaced and once mapped up new brakes, but at present 
with Revo STG2 its a joy to drive, and the engine is strong and runs like new. I shall have that up for sale soon too 

Thanks again mate. I shall use you as my upgrade guru from now on