All Things Mk5 > Performance Modifications
Quite induction
Dave J:
How have you got round the intake pipe hitting/putting pressure on the coolant union?
I love how my VWR intake sounds, but it has broken the union once and I'd like to know if anyone has good suggestions how to solve the issue other than junking the setup...!
Would this sort it; http://www.gruvenparts.com/vw-audi-bpy-billet-radiator-hose-4y/
pudding:
--- Quote from: Dan_FR on December 31, 2017, 07:31:11 am ---What software are you running when conducting the tests? Revo software or flashed back to standard?
Be interesting if these tests were conducted on 100% stock software
--- End quote ---
Sorry, I should have added the tests were all done with Revo 2+ software on the same B9, T5, F7 setting.
--- Quote from: Dave J on January 01, 2018, 05:37:51 pm ---How have you got round the intake pipe hitting/putting pressure on the coolant union?
I love how my VWR intake sounds, but it has broken the union once and I'd like to know if anyone has good suggestions how to solve the issue other than junking the setup...!
Would this sort it; http://www.gruvenparts.com/vw-audi-bpy-billet-radiator-hose-4y/
--- End quote ---
For the purpose of the test I just threw it in loosely without the front air scoop, which means you can run the canister above the coolant pipe. If I was to fit the VWR kit permanently, I would put a dent in the canister for clearance. Or you could tilt the canister up above the elbow and use an OEM plastic flex bellows to join it to the other pipe. The bellows on the stock airbox fits the VWR piping if you trim off the oblong end of it.....or any 76mm ID OEM bellow from any VAG car will do the job. Just don't use rubber as it may collapse under boost, restricting air flow.
The Gruven parts elbow whilst stronger, doesn't address the issue. The canister would just wear through the pipe instead of breaking the outlet off. The only fix is to provide adequate clearance for engine rock. Something VWR should have done in the first place but VWR are like so many other small UK companies - virtually bugger all R&D and a very strong "that'll do" approach to things, rather like the utter embarrassment that was British Leyland.
Dan_FR:
I must say I'm really quite surprised at your findings @Pudding I never thought the Revo would be so far off when using their software.
Let us know once you have reduced the intake ID to 63MM and whether it helps. I imagine, if your car responds as mine did, that once you correct the MAF readings the car will drive all the better for it
pudding:
I was surprised too given how Revo proclaim to have the MAF scaling spot on. New MAF, old MAF, makes no difference. No vac leaks etc.
It didn't drive that badly with high trims to be fair, but putting the stock air-box back on has improved the idle quality and part throttle response no end.
pudding:
I appreciate this is likely old news, but in the interests of sharing.....there's a lot of interesting info in this (6 year old!) thread - http://www.vwgolf.net.au/showthread.php?11812-Forge-Wintake-amp-MAF-sensor-read-issue
According to that thread, the Volant intake shows 3% trims and was the one the tuners in that thread recommended back in 2012. The info and testing relates to the MK6 R, so very relevant to ED30 owners.
Other useful little nuggets I picked out of that thread:
The top end AFRs can be 0.5 leaner than requested if the trims are not correct, which is dangerous at 2+ levels of tune.
Most of the tables in the ECU rely on accurate MAF readings, therefore it is recognized that software tuners don't (or shouldn't at least) modify the MAF table, otherwise the engine would be locked down to a particular intake for life and skew other calibrations.
The regular K03 engine doesn't seem to suffer with wild fluctuations as much as the KO4 engines. Must be a flow dynamics difference between the two compressor wheels.
This little beauty :smiley: http://www.42draftdesigns.com/fsi-oem-style-maf-housing/ Hats off to them for that one. Very neat.
Adding a laminar grid has shown improvements.
And some other bits n bobs.
In other news, Revo 2+ continuing to drive very nicely indeed with the stock intake. Kept up with a new shape 335d no problem on the way into work this morning, so that's a good sign things are healthy as they are bloody quick in the midrange.
Cold starting and hot and cold idles are also considerably better compared to the Revo intake. As is part throttle smoothness.
Thinking of just throwing both intakes onto ebay to be honest. Feeling a bit indecisive. I don't think the modest top end gains are worth the high price of the intake, the noise, or the idle/part throttle rubbishness in all honesty.
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