First time I've seen a picture of your car posted as a piece of art rather than a cadaver for the purposes of education. Having said that your engine bay is pretty sexy
Good progress, just thinking, with the inlet working loose, do you think it is because of the inlet bracket that no longer fits after fitting a phenolic? I say this because i extended mine so it still fits and checked my bolts 10 mins ago (out of curiosity) and they are still locked down...slight vibrations??
I just forgot to re-check this time around as I haven't used new gaskets the last couple of times the inlets been off as they came off clean so I used a little high temp silicon and refitted..
The loosening is purely the gaskets settling in this case..
Actually managed to flash in a file tonight that I have being doing some more work on... done quite a few tweaks here and there and obviously needed to cap off the boost a bit as I knew it would go mental with the stronger springs in the Tial...
Capped off N75 to 70% as a start (was set to 90% previously) and initial runs produced a rather scary off scale boost reading over 2bar so clearly needed to be a bit lower lol...
Capped off at 50% and although still getting a spike to just under 2bar it settles down to around 1.5bar ish... although to be fair I was more concerned about what was happening on the road at the time :whistle2:
Only did a quick log just to see where everything was...
Timing is a bit wiggy atm... getting pull as a result of the boost spike and slow recovery which I know I can fix but tbh I am pretty happy with where its currently at as a start point to finer tuning... LTFT's are currently sat at -3.1% which I can live with for now and to be on the safe side I have disconnected the N75 again until I can get a chance to log some more stuff and makes tweaks to bring the boost under control...
Other nice thing is the drivability... I have tweaked some stuff and off boost performance is much better than before... felt a tad flat before but feels nice now... more timing can be added below 3k to improve this more but will leave that for the dyno now I think...
Happy with the results... map is loads better than I remember previous ones were which goes to show how much the hardware changes had affected my original one... learning stuff all the time with this mapping lark which is quite exciting too...
Pending any emergency tweaks this will do now until the inlet manifold is on... I want to do the final (I say final but it won't be of course LOL) stage of tuning with the final hardware configuration all done so there are no nasty surprises..
Nearly there after all this time... be nice to finally draw a line under this 'stage' of her evolution :D
Is your MAF maxing out ?
Got a S4 one you can have
If you do fit a RS4 one could you let me know what % you input into the liquid gauge to calibrate the bigger maf
S4 one ironically should be just enough tbh as they max at 420hp... can't see me getting much over that on my setup and with how I want to run the engine anyway so I'm game..
As for the Liquid stuff... tbh this is more to cater for the 'popular' TT modshack mofo MAF tube mod... (Modshack | Stage 2 MOFO (BAMM))... from what I understand you use a combo of this larger tube and a 4bar to 'fudge' the ecu into not adapting out the extra fuel from the 4bar whilst allowing better breathing from the larger MAF... you can adjust the Liquid to calibrate air flow for liquid but obviously it will still be out in VCDS...
Mine read well over 200 gs at idle
I'll get it sorted in the end
The standard BAM S3 maf will actually read higher than an S4 one.
The wideband sensor gives it a wider range, meaning the BAM MAF will read to ~345g/s whereas the S4 ones will only read to 330ish.
I suspect your 292.58 is just VCDS reaching its silly internal limit, do some logs with ME7Logger and compare!
Its the tube with the S3 sensor
PM me your address and i will get it out asap for you as i have no need for it
The thing is when we fitted the RS4 to mine we didn't swap the sensors over so we just used the RS4 sensor
I take it the sensors are the same
I have read though that RS4 scaling on a 4 pot can be a big wiggy... need to read up a bit more about it of course but tbh I suspect teh S4 tube will do my current power level... just need to find an early S4 map pack... A-box and B-box I believe have bosch MAFs so I am sure I have something kicking about
Is it ok if i just send the tube as i have my sensor in it
NefMoto - Index) and a few other resources to help me
Why would you mess around fitting an S3 sensor into an RS4 (or S4) tube anyway?
Just use a complete RS4 (orS4) MAF and use the MAF calibration lifted straight from the original cars file.
Messing around with different sensors in different tubes is never going to be as accurate as a proper Audi factory calibration.
RS4 maf sensor is not compatible for starters
Looking good tuffty I wish I had the cash to make mine crazy fast
Whys it not compatible, given that Andrew says hes using it...
There is a discussion on NefMoto concerning RS4 scaling on a 20v..
Load capping out
I need to absorb this a bit and see where it goes... sadly its never just a case of copy and paste with these things as subtle differences between the hardware mean that you will have to adjust something somewhere...
The RS4 MAF sensor is different to the S3 (049) one so would need adjusting regardless... tbh its irrelevant as its just a case of fine tuning on the dyno really...
All part of the fun and games :)
I'm using the RS4 sensor so what sort of problem will i have then
I still have the S3 sensor
I thought you were going MAF less? have you fitted the wideband ECU yet? you will most likely need the later 049 S3 sensor if on wide band unless you scale accordingly I guess...
Mapping wise its all down to finding the right start point and work from there... you can run larger MAFs without scaling as you can compensate in other maps for fuelling and such... its just the gs readings will be out when logging...
Will see how it goes... I will be rescaling mine in the S4 MAF kindly supplied by your good self and see what issues occur but generally I know stuff has been successfully tuned without scaling as long as everything is kept relative... dyno helps :D
Decided agents it as with the maf would get better drivability for everyday driving.
Wideband ECU is fitted and was a very simple conversion as i followed the guides on the net and all the rest was left to Paul. He mapped out the EGT bit as my APY didn't have it so i think Paul scaled the RS4 to suit as he did ask for the Bosch part number to get the right scale for the map
With the wideband Paul thought it was better to map and much better for my power levels i'm aiming for.
Happy to help sort that if you let me know how you wanna play it... PM me details etc as and when..
I'n not sure but i think S3Dave is wanting to do this conversion also so if he does i know he will ask for my help and we could do a guide?
Paul: I'm not sure the above nefmoto link is related specifically to using the RS4 MLHFM. It seems to me (from a quick skim) that once load/power starts getting very large, an internal limit in the ECU is reached.
This would happen with any correctly scaled MAF, be it an RS4 one, V8 one, or S3-sensor-in-some-bigger-housing. The bodge-fix being to underscale the MAF so the ECU doesnt see such high load figures.
I'm still intrigued as to why Bill thinks the RS4 MAF as a complete unit isnt compatible, when theres a lot of evidence out there showing that they work just fine...
S4 MAF tube turned up today... big thanks to Andrew for this :D
Not a problem as said i had no need for it and your needs are greater than mine.
I know that my maf tube is good for about 800 bhp? ( correct me if i'm wrong bill ).
RS4 MAF maxes at 499gs allegedly but on VCDS it maxes at 367gs IIRC
Mass air flow - S4wiki
Haha, there's a few projects that have never made the strip or track. One "DaveS3" springs to mind :ninja: