All Things Mk5 > Members Rides
My Black 3 Door Manual ED30 No2297
AJP:
I wouldn't get too hung up about the standard rear section of your exhaust. From learning lots about these TFSIs over the years it's pretty much solid consensus that the downpipe and cat is massively more of a bottleneck to flow than the rear section. Yes, in an ideal world you'd have a full system with shiny tailpipes or even the clever valved rear section of a BCS Powervalve, but in terms of raw tuning it's the downpipe that's crucial. If I had to guess, I'd say 90% of the restriction is the downpipe and cat. And I'd also take a punt and say that the rear section only becomes a genuine bottleneck in a big turbo situation, chasing big numbers.
Good shout from Shoduchi on the BBT anti-surge turbos! Dan Smith on here had one of their anti-surge k04s mapped by R-Tech - the graph is knocking about on here somewhere. Made great peak power as you'd expect, but the really impressive thing was the torque curve. It came in noticeably sooner than you'd see on a typical standard k04 - almost in k03 territory - then ramped up solidly without that telltale dip where a mapper is forced to tune around surge on a standard k04. I can imagine it was f***ing glorious to drive. Of course with a true hybrid built for peak power you would lose some of that ability to spool from lower revs.
So really it boils down to envisaging your end goal in terms of tuning. Do you need 400+ bhp & torque and all the associated costs with fuelling and wear? Or would a tweaked k04 allowing a balanced, reponsive power delivery be more your thing? It's good to remember that these hybrids like the TTE420/480 are indeed capable of big peak numbers, but there's a lot to be said for creating a build where there's headroom in the hardware and also where the power, brakes and suspension are sensibly balanced and cohesive.
csrigo:
--- Quote from: Shoduchi on December 15, 2018, 04:01:17 pm ---I got my TTE420 in second hand from a fellow Ed. 30 owner. I wouldn't have bought a new one just after buying the LSD, all the parts needed to get it fitted and labour costs. If you have the funds and want more grunt, go for it. It's a good upgrade to a K04 at 370 hp. If you don't want to spend that much on a turbo and you're happy with the current power your car has, consider sending your K04 to the Beach Buggy Turbos to get an anti-surge core: http://0afa09.7.ekm.shop/anti-surge-tfsi-core-188-p.asp
It can make power sooner and go up to 380 hp, like a stock K04. Not sure how much R-Tech would charge for a map tweak to take advantage of the anti-surge core. :smiley:
Before going for the TTE420, I was considering that option if my K04 needed to get repaired. :smiley:
--- End quote ---
Cheers for the response mate ive been hectic as we all probably have been this time of year. Thats good you got your unit 2nd hand that was handy in itself getting the perfect double whammy so to speak...Hybrid Turbo and LSD bet it drives immense :smiley:
My head is up my arse tbh been too busy lately and now the car has that miss at idle again....not even been driving the golf really thought i would keep it stored till it was painted but had some nice (dry/sunny) weather and now this has creeped back up....annoying :sick:. I think im going for the core replacement for now purely for cost as i dont have the lpfp sorted yet and im really not wanting the TTRS one if it messes up with the fuel guage etc and also im thinking firing in 4 new injectors whilst the mani is off and be done with it....so it all adds up....unsure if the new core has to be mapped to run or just remapped to be optimum....Rtech is 6 hours away from me :doh:
I have a WMI kit i got from a mate im considering installing whilst doing the injectors....now this is mainly to keep the valves clean after all my hard work cleaning them as i dont fancy a catch can kit...too many issues....thoughts?....and im not planning mapping it in to ring the neck out the timing just yet....notice any gains without doing this?
Too much as always....just when i thought i had the maintenace all square this happens...which means more money rectifying before you can get back to spending on the good stuff...standard.
csrigo:
--- Quote from: AJP on December 16, 2018, 04:33:40 pm ---I wouldn't get too hung up about the standard rear section of your exhaust. From learning lots about these TFSIs over the years it's pretty much solid consensus that the downpipe and cat is massively more of a bottleneck to flow than the rear section. Yes, in an ideal world you'd have a full system with shiny tailpipes or even the clever valved rear section of a BCS Powervalve, but in terms of raw tuning it's the downpipe that's crucial. If I had to guess, I'd say 90% of the restriction is the downpipe and cat. And I'd also take a punt and say that the rear section only becomes a genuine bottleneck in a big turbo situation, chasing big numbers.
Good shout from Shoduchi on the BBT anti-surge turbos! Dan Smith on here had one of their anti-surge k04s mapped by R-Tech - the graph is knocking about on here somewhere. Made great peak power as you'd expect, but the really impressive thing was the torque curve. It came in noticeably sooner than you'd see on a typical standard k04 - almost in k03 territory - then ramped up solidly without that telltale dip where a mapper is forced to tune around surge on a standard k04. I can imagine it was f***ing glorious to drive. Of course with a true hybrid built for peak power you would lose some of that ability to spool from lower revs.
So really it boils down to envisaging your end goal in terms of tuning. Do you need 400+ bhp & torque and all the associated costs with fuelling and wear? Or would a tweaked k04 allowing a balanced, reponsive power delivery be more your thing? It's good to remember that these hybrids like the TTE420/480 are indeed capable of big peak numbers, but there's a lot to be said for creating a build where there's headroom in the hardware and also where the power, brakes and suspension are sensibly balanced and cohesive.
--- End quote ---
Cheers for the reply mate some good points. Yeah i totally agree the DP and sports cat/decat is the most important which i ve sorted...cant remember if its 200 or 100 cell tbh...Nicky Gower who mapped the car said the standard back section is choking it however i did tell him i wasnt down there to chase numbers just wanted it running sweet but maybe he thought he had to give a reason for it not making more than it did or something....even tho i was more than happy with what it made lol who knows.
I think you make a great point about the core which is the way ive went. Dunno about the mapping scenario yet need to speak to Nicky but im busy sorting other niggly things just now before i go full hog hybrid etc. Which is going to require the lpfp and il need to upgrade from my RS4 fprv for a 165b one which is annoying(all that can wait)....im ocd with the car and need it running perfect before i upgrade etc....the core is different thats a must its the turbo whine thats made me stop driving the golf as much as well tbh lol so it needs doing asap.
Some nice weather tmoro so il do some testing with vcds and try and get a few recent pics of the car up since i dnt have any with its current coilover stance and geometry setup with the DB9 brakes fitted etc. Long overdue an updated mod list.
RBS:
Great job! :happy2:
Looks mint :wink:
csrigo:
Not posted in forever been working away so I'm back and got some dark thoughts....
I may put the golf up for sale :surprised:
A quick update on the golf tho..
Running amazing and sorted a few niggly issues before I left. I also fitted my quaife LSD which has changed the dynamics of the car to a certain degree....I wouldn't say transformed like some people do but its it's definitely quicker in some conditions.
Anyway I'm aiming to get some new pics up and sticking them up here with a full updated list of mods and servicing/maintenance I've done to see if there is any interest....not sure I'm selling it yet dont think I'm sold on parting ways until I make a decision on what new car I'm getting.
Some new pics hopefully later today if the crappy Scottish weather gives me a break
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