ANDYTQ
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2.0T FSI Forged Engine Build Has Started, Big Turbo Build.
- Thread starter Craig Cull
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ANDYTQ
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I'd get milder cams tbh assuming you mean properly wild . That turbo won't make use of the wilder cams as it'll be out of puff
I've bought the cams now so won't be changing them. I'm going for oversized valves as well so when the time comes that the turbo can't supply the desired boost, it will be going straight to Owen developments for a HTA3582R M spec conversion into the 30 housing (which was the original plan, but this came up at a steel)
But for the time being the exact same set up did 530bhp without the second set of injectors and had plenty left in the turbo. This car is something I'll have until I die so whenever we come up against a brick wall, we will just hop straight over it with a new plan
This exact set up was on this TT. We've worked very closely with this company in Greece to make sure the set up we run is future proof.
530 on the hta is feasible. Not the 3071 without pushing it past 2bar. It's way off the efficiency island.
This turbo is out of the TT that I just showed you. It has proven 530bhp @ 1.5 bar. It's doable otherwise I wouldn't have bought it.
Typo. However the gtx needs pushing far harder than I'd like to produce power. I'd expect mid 400s from it. Good luck. What tune you going for?
I pulled nearly 400 out of a k04 hybrid last year.
I'm confident rick @ unicorn motor developments can get what we're looking for. I'll keep ya posted anyway as we progress, whatever it takes to achieve over 500bhp will be done. That's one thing I can guarantee
I'm confident rick @ unicorn motor developments can get what we're looking for. I'll keep ya posted anyway as we progress, whatever it takes to achieve over 500bhp will be done. That's one thing I can guarantee
I've slept on your comments (which are all noted and taken from your personal experience) and I have decided to send the turbo to OD to be converted to a HTA3582R M spec. That way i think we can hit the higher numbers at a lower boost and also take advantage of the higher rpm. And also keep it in the same place. (hopefully) the build may move back a month but I guess you have to speculate to accumulate. I'll keep you posted
Well OD ****** on my bonfire today. Can't do anything with the GTX as the GTX wheel is very similar to the HTA wheel. Only thing they could do it put a bigger wheel in the GTX (35) but It wouldn't be half as responsive which is no good. Only option is to buy a HTA3582r M spec turbo built into a 28 housing at nice price of £1985 inc vat.
This year 2014-2015 it isn't going to be an option.
On the plus side, the GTX is going to be good for 500+ but it will be close to it's limits past 500.
So for this season coming I will be sticking with what I have. After speaking to rick today, it sounds like fueling and flow isn't going to be an issue.
So next year (2016) is where we will trial the second set of injectors with a HTA3582r m spec.
Progress I guess
This year 2014-2015 it isn't going to be an option.
On the plus side, the GTX is going to be good for 500+ but it will be close to it's limits past 500.
So for this season coming I will be sticking with what I have. After speaking to rick today, it sounds like fueling and flow isn't going to be an issue.
So next year (2016) is where we will trial the second set of injectors with a HTA3582r m spec.
Progress I guess
great thread craig , very impressed with your tuning skill etc, you certainly know your stuff.
one question though, how far can you take the tfsi engine before it hits the performance wall, surely you're getting close to the limit of what the engine design can handle even in a very well tuned state.
great stuff though craig, your a4 project reminds me of my ducati race bike tuning projects trying to extract more power from a DOHC v-twin can be a challenge , shed loads of money outwards and shed loads of performance in return, i lookforward to following this further.
rob
one question though, how far can you take the tfsi engine before it hits the performance wall, surely you're getting close to the limit of what the engine design can handle even in a very well tuned state.
great stuff though craig, your a4 project reminds me of my ducati race bike tuning projects trying to extract more power from a DOHC v-twin can be a challenge , shed loads of money outwards and shed loads of performance in return, i lookforward to following this further.
rob
Fair enough. .. I just didn't want you expecting 550 and being disappointed not achieving it. It'd still be a quick car at 450 odd over the poxy 064 hybrid . At 400 bhp we are wringing the neck out of them. Build and enjoy her
Cheers rob, we're certainly getting there
On the k03 based TFSI I would be reluctant to push it passed 370 lbft of torque, as it's the low down torque which is a rod bender.
The k04 produces more low down torque which can prove fatal to the k03 based engines. All though some tuners are really getting some good figures out of a standard TFSI, the figures are much higher than I would fancy testing long term.
The k04 based TFSI is apparently good for 500 lbft on standard rods, once again much higher than I would be willing to test.
I had a hard time sleeping at 370lbft which is why I stripped it out.
Where as the 1.8t couldn't safely break 300lbft without the possibility of throwing a rod.
The TFSI is a very tuneable engine really. Anything your k03 can handle, the engine will laugh at. Very safe with a stage 2+ k03 for example.
Yeah I understand what your saying mate. 500bhp is just a target really, it's not compulsory (although it would be nice)
The 1/4 mile time is more important to us tbh. John hurditch in his golf r is doing 11.08 1/4 mile. I want to be up there with him for gti international next season. That would be a massive accomplishment and really would put us up there with some of the most well know names in the game. That's when we can promote our company. That's the main aim. It's basically our development car
Hurdys car is DSG though. You will need 600+ hp to do those times in a manual car. However I am watching your build with great interest ;-)
I'm not sure tbh, with flat shift and short shift linkage, I can get a pretty quick change. Plus there's no fun in sitting there with your foot down drinking a brew whilst tapping a button lol. Where's the skill in that? Might as well stick a movie on at the same time for good measure.
I don't want to beat john, just want to be up there with the names. We did just over 13 seconds 1/4 mile on the k04, which is the fastest recorded 1/4 mile for a b7 on a k04 between here and the states. There's only one above us on a big turbo and it's only .2 of a seconds faster and it's APR.
Intend to pull that to pieces.
Hoping to be all sorted for March to go get some practice runs in up at York if anyone fancys a trip?
Odd given the rods are potentially weaker than 1.8t rods. Must be the stroke /rod ratio playing a partCheers rob, we're certainly getting there
On the k03 based TFSI I would be reluctant to push it passed 370 lbft of torque, as it's the low down torque which is a rod bender.
The k04 produces more low down torque which can prove fatal to the k03 based engines. All though some tuners are really getting some good figures out of a standard TFSI, the figures are much higher than I would fancy testing long term.
The k04 based TFSI is apparently good for 500 lbft on standard rods, once again much higher than I would be willing to test.
I had a hard time sleeping at 370lbft which is why I stripped it out.
Where as the 1.8t couldn't safely break 300lbft without the possibility of throwing a rod.
The TFSI is a very tuneable engine really. Anything your k03 can handle, the engine will laugh at. Very safe with a stage 2+ k03 for example.
My mate owns a tuning company who specialise in the 1.8t. They won't map anything over 300-320lbft without fitting a descent set of rods. Just going off what they say really. I don't understand how they can be weaker if they can take more and have been proven to.
The tfsi rods are slightly thinner and sintered. Bizarre. 1.8t is correct when they wrte new but these are older and will have fatigued a lot more now. Std cars are now bending rods and others manage 400 or more. 8 think the tfsi weak spots will start to show now they are getting abused and aging. Time will tell.
b7boostin
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Hey man, We recently ran a 12.8 in the 1/4 mile in my car. I will be posting the information and video of the run here soon on Audizine! I am excited to see your car running with the new setup and to see what it can do!
http://audirevolution.net/forum/index.php?topic=2997.0
http://audirevolution.net/forum/index.php?topic=2997.0
That's awesome mate! Cracking time! Feel free to send me any videos etc! We're a little behind due to failed tfsi's coming in and loads of bodywork so close to Xmas (not that we're complaining) so fingers crossed we will start it in the coming weeks. I will keep you posted on any progress!
Your time goes to show what can be achieved with the right set up and the right driver behind the wheel! I may be coming to you for an LSD as well. Think it's a must!
b7boostin
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Thanks bud!
Workflow is definitely not something to complain about! Like people always say, you got to work hard to play hard.
The LSD will help a LOT if you are having issues with traction. Surprising, I still haven't installed it in my car yet! We have been too busy getting her running and starting the tuning process.
JudderMan
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So what have you done then? A Subaru TD05? With S3 injectors? What's the power output at the moment? I'm interested in this build as it's different, might be a good option for some of my customers.
I didn't mean it was laggy from set off, I just meant mid range. You had to be ready to drop it down a gear to get into boost if you were caught off guard 
b7boostin
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Yup! Basically a T25 TD05H-20G like used on subies and DSMs. We ran on a base tune, as we only had the car running for a few days prior running it at the track to see where we were at. Based on what it did at the track it is performing like a B7 RS4 and we will still probably be able to squeeze more out of it on stock internals since we did this on 20psi.
JHM TD05H-20G Turbo Kit
JHM HPFP Upgrade
S3 Inectors
Nice! I'm assuming your not running standard intercoolers at that?
All supporting mods already on allongside this build?
I'll look forward to seeing what figures it makes. Will you be limiting the torque on the stock internals as well?
b7boostin
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Yeah I have our full exhaust setup, clutch etc..
This is the intercooler I use: https://jhmotorsports.com/shop/cata...t-mount-or-fmic-jhm-for-b7-a4-20t-p-2026.html
Not sure if I ever take it to the Dyno since we only care about real world data, but you can do the math based on traps speeds and vehicle weights!
Yeah I'll do that, it's always good to speak to people with experience.
Yeah your right really, the figures speak for themselves, but it's always nice to know what other figures contribute to it. Especially if it's less than expected but delivered efficiently.
Really keen to get my build under way now! I've set some time aside between Xmas and NYE to finish the exterior, then January when the block and heads back, it's time to put it back together! Seems like an eternity!
b7boostin
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Yeah it really is!!
I completely understand that pain, every time my car is down for R&D it drives me nuts!
