My minor modding thread

Nothing as yet really... I have started to strip the head and the EGT bung has been made... I am sorting out the 60mm alloy bends to do the charge pipe work and I have now got all the bits I need to fit my stereo gear..

Just a case of finding time and getting the rest of the bits to get it all done really... Shouldn't be too long hopefully :)

<tuffty/>
 
Certainly hope so... just need to get off my fat **** in the evenings and get the stereo in and maybe take a week off work so I can use Bill's place to get the head built and fitted and all the pipework sorted for him to weld...

Need to order the valves and springs yet and get the head off for the machine work to be done... Once I have accumulated the bits it will just be a case of getting it done then really...

<tuffty/>
 
tufftybloke said:
Certainly hope so... just need to get off my fat **** in the evenings and get the stereo in and maybe take a week off work so I can use Bill's place to get the head built and fitted and all the pipework sorted for him to weld...

Need to order the valves and springs yet and get the head off for the machine work to be done... Once I have accumulated the bits it will just be a case of getting it done then really...

<tuffty/>
Click to expand...

More work? Are you aim for 400bhp or something?
 
Small update... not much actual work done as yet just accumulating bits at the moment...

Got all the bits now to have a go at going 60mm charge pipe all round including modding the FMIC to take a 60mm outlet replacing the current 51mm ones and fitting the super size DV...
20100501_CRW_4057.jpg


20100320_IMG00015-20100320-1510.jpg


I have bought some Supertech valves and valve springs now and have started stripping the head ready for a light skim and new valve guides...
20100501_CRW_4060.jpg

20100426_IMG00046-20100426-2007.jpg


I will be using the cams and followers from my current small port head as I know these to be ok.

Notice the difference between the large port head in the foreground and a ported small port in the background..
20100426_IMG00044-20100426-2007.jpg


...and a closer look at the inlet ports...
Ported small port
20100426_IMG00057-20100426-2011.jpg


Non ported large port
20100426_IMG00058-20100426-2011.jpg


One thing I did notice with this head is the threaded hole for the cam belt tensioner roller has a raised platform compared to all the other heads currently residing at Badger 5 so I will have to get this machined flush too...

My large port head
20100501_CRW_4059.jpg


A N Other head...
20100426_IMG00049-20100426-2008.jpg


In the process of sorting a rig out to compress valve springs without damaging the follower bore... the VAG kit seems a little belt and braces...

Still accumulating bits and need to get the existing valves out before I can do much else with the head...

I now have all the bits to fit the rest of my stereo gear now so may have a crack at that in the next week or so to keep things moving until I have everything ready to take the car off the road and get the head and 60mm charge pipework fitted...

<tuffty/>
 
Last edited:
Nice update tuffy, so does this mean ull be ditching the foglights or are u gonna try and make it work with 60mm piping?
 
Where are you going to hide the catch can mate?.. surely there's not any more spare room to hide any more mods lol
 
Lee Goodall said:
Where are you going to hide the catch can mate?.. surely there's not any more spare room to hide any more mods lol
Click to expand...

Its a poser and as yet I am unsure as to final positioning... I may even use a different catch tank yet depending but will see what happens when everything else is in place...

<tuffty/>
 
audi upgrades
60mm charge pipes...
Im sure i recomended this ages ago
Ah well, good luck with this job. Mine was a pig and i nearly threw in the towel. :)
 
S3 Paul said:
60mm charge pipes...
Im sure i recomended this ages ago
Ah well, good luck with this job. Mine was a pig and i nearly threw in the towel. :)
Click to expand...

My reasoning and comments about using 51mm still stand mate... 51mm is still the easiest way to get a decent FMIC onto an S3... period... for most people its more than enough and certainly so for the lowly K04... If it wasn't due to running a GT30 and going large port head it would still be... it still cools and flows enough to produce over 350bhp....

Going 60mm is just another step in my cars evolution... If I didn't have the access to the resource I do have with Bill's workshop and excellent fabrication skills I probably wouldn't bother....

<tuffty/>
 
Lets not go there again...
My reasoning for going 60mm from the off was to put in place something i maywel require in the not too distant future.
I agree 51mm will always be the best ( easiest route) way to go about a fmic.
BUT,
The larger set up "should" aid the flow of charged air to the engine, I do envy you that you have Bills workshop available as the people i use work on a range of cars so sometimes the aproach taken is slightly away from what the audi scene will follow , But we all get there in the end,
The plan for my car is/was to fit a gt3076r to the forged engine ive just fitted. BUT with the high costs involved with this it may or maynot happen, So each step i take towards it is a causious one.

Im sorry for my poor spelling
Good luck with your project and i look forward to seeing what 400+ is like in an S3
 
Wasn't going anywhere bud :)

Thanks for the support though, always appreciated... Yep I agree... larger bore will help with the flow... Bill has been badgering me (no pun intended) for ages about it... he likes his flow ;P same with the large port... wasn't gonna cave but I need to change the valves so may as well do it to a head that will suit the airflow the GT30 can provide...

I know what you mean about cost... I have no idea how much I have spent so far... its not a great deal comparatively tbh as I have done most of the work myself but it all adds up and while I have caved in a little with things like the 60mm and large port head I have tried to stick with my original plan to only upgrade bits that needed it and retain an OEM look to the work I have done... hopefully I have pulled that off...

400bhp is the goal, how close I get to it I don't know but with the latest round of planned mods I guess it will be as close as I can get to achieving it with the turbo/manifold combo I have and any possible restriction the inlet mani is providing...

If you do look to go for a larger turbo (and I hope you do, its worth it :icon_thumright:) I hope what I have done here gives you a little help in deciding how you go about it... GT3076r will certianly benefit form a large port head and you will have to do the valve train to as the rev limit will need to be upped to make any use of the power that turbo will be capable of...

Good luck with yours d00de :s3addict:
<tuffty/>
 
Ive already put the wheels in motion regarding the head. ( a fully built spec'd up large port item ) Im still unsure where the story will end.
It realy is a squeeze with the bigger boost pipe work though, Be good to see how you tackle it,
 
My biggest concern is the the strength of the join at the end tank tbh... the extra 'leverage' the 60mm bend I am looking to use is a worry but I think I will look to strengthen it by supporting fillets etc to make sure vibrations etc won't crack the joins... I have got some 60mm silicon bellows too to try and introduce so 'give' into the pipe work.

I will update the FMIC sticky if this is successful and feed back to Alex at AH Fabs to see if this is a viable option to the 51mm FMIC I originally designed...

<tuffty/>
 
If i remember rightly... the problem was getting around the fog light mounting brakets
I trimmed mine back as far as i would like . i added a silicone joiner on the drivers side... about where the middle of the side mount cooler would be... to make it easier to fit/ remove and allow for a bit of flex.
 
Does the AEB/AGU head need any work to fit it to the amk/bam bottom end on the s3 or is it a direct replacement apart from the different size in ports? Does the VVT system still work? Are all of the internals still the same size on the heads? Cheers Andy
 
Andy123 said:
Does the AEB/AGU head need any work to fit it to the amk/bam bottom end on the s3 or is it a direct replacement apart from the different size in ports? Does the VVT system still work? Are all of the internals still the same size on the heads? Cheers Andy
Click to expand...

.....and breathe.... :)

AEB is A4/Passat, AGU is A3.... the AEB I have is an earlier one by the looks but essentially all 1.8t heads are reusable across the VAG range... As I pointed out in an earlier post, there is a bit of work needed to get my AEB sorted as it would appear the earlier head had a different design for the cam belt tensioner roller mount. The A4 cam pulley is not the same as the transverse engine but I will be using the cam gear from my AMK head anyway.

The VVT mech is a simple bolt on replacement for the non VVT cam chain tensioner.

Valves/springs/followers are the same across the 1.8t range... I now have my Supertech valves, springs and titanium retainers (pics to follow) and I will be using the followers from my AMK head.

AGU is more of a 'bolt on' replacement for transverse engines than AEB/ADR but all parts are transferable...

<tuffty/>
 
tufftybloke said:
.....and breathe.... :)

AEB is A4/Passat, AGU is A3.... the AEB I have is an earlier one by the looks but essentially all 1.8t heads are reusable across the VAG range... As I pointed out in an earlier post, there is a bit of work needed to get my AEB sorted as it would appear the earlier head had a different design for the cam belt tensioner roller mount. The A4 cam pulley is not the same as the transverse engine but I will be using the cam gear from my AMK head anyway.

The VVT mech is a simple bolt on replacement for the non VVT cam chain tensioner.

Valves/springs/followers are the same across the 1.8t range... I now have my Supertech valves, springs and titanium retainers (pics to follow) and I will be using the followers from my AMK head.

AGU is more of a 'bolt on' replacement for transverse engines than AEB/ADR but all parts are transferable...

<tuffty/>
Click to expand...

i wish i had enough money to give my car to you or/ and badger to rape!! would be a monster!
 
  • Like
Reactions: ashley cox and fanta
Got a chance to take pics of the new valves... not very exciting I know but this wouldn't be a proper build thread if I didn't show them off :)

20100508_CRW_4065.jpg


Supertech springs with titanium retainers and collets for the single groove valves...
20100508_CRW_4068.jpg


Inconel exhaust valve (left) and black nitrided intake valve (right)
20100508_CRW_4069.jpg


I have most of all I need now to get the next phase of mods done but I will probably wait a while before I actually get around to do it all as I want to be able to dyno the difference each of the tweaks makes and for that I will wait until Bill has got his dyno installed.

Plan is to get the EGT boss welded into the DP and fit the EGT probe properly... I will then baseline the cars power in its current configuration. Once that is done then I will do the 60mm charge pipe/FMIC upgrade and dyno that to see if the potential increase in flow develops any more power then see if I can turn up boost to get any more out... I will then fit the large port head and dyno that...

This should hopefully show what difference (if any) each of these additional mods can make so that anyone wanting to go big turbo can make their own mind up as to how far you wish to take your car..

<tuffty/>
 
Last edited:
Coming along nicely Paul. Looking forward to seeing it at an event soon. Might have to get you to talk me through it over a pint!
 
Had some time to myself this afternoon as I wasn't at the workshop. I have been having a few issues with boost control ever since my latest map had the boost upped from 1.4bar to 1.7bar.... Boost has been dropping off randomly or wavering between 1.4 and 1.6bar rather than holding as it should... I initially put this down to the actuator and was going to try a bit more preload as this helped the last time I had a similar issue...

I have tried an MBC (manual boost controller) before but without much success... I couldn't be bothered to play with it previously but thought I would give it another go...


Using a Forge UNOS MBC I bypassed the N75 completely (leaving it electrically connected and blocked the pipe going to the TIP) and gave it a try.
20100515_CRW_4076.jpg


It was one that Bill had used on the Polo build while mapping so should be set about right... however, when I tried it I was still getting varying boost so I fitted the stiffer spring that comes with the UNOS, wound it back to its softest setting and tried again... steady 1.4bar this time... wound it up 20 clicks... over 2bar!! eeep!!... wound it back 5 clicks and it settled nicely at 1.8 (ish) bar....

Car was pulling nicely and it held boost pretty much up to the redline...sweet!!!

Think I will fit that in properly now as its just lazing about the engine bay at this moment (I have cable tied it in now)
20100515_CRW_4077.jpg


Max airflow I got from that run was 282g/s... this is lower than I have been getting in the past as my MAF is a little tired... I have previously been only getting in and around the 270 mark where I have logged over 290 before... I have previously tried a MAF Bill had on the shelf and my airflow was back up at 292g/s so a new MAF and pre-cat lambda are on the shopping list for the end of the month.

The 282g/s was encouraging though as the MBC appears to be working nicely and maintaining boost keeping the airflow up. This was when I decided to have a go at de-meshing the MAF...

De-meshing the MAF has been discussed before and that ASN pioneer of modding Welly has done his... I am little sceptical but thought 'what the actual hell!!!'

Here we have an S3 MAF... grille thingy at the front (airbox side)
20100515_CRW_4071.jpg


..and TIP side...
20100515_CRW_4070.jpg


TIP side grille was an easy job to remove..
20100515_CRW_4072.jpg


20100515_CRW_4073.jpg


The airbox side less so... this is where the 'mesh' is. The plastic grille is retained in the MAF housing so I ended up having to push from the inside of the MAF while unclipping the retainers to allow the grille and mesh to pop out... I damaged the mesh doing this, good job its not going back in :)
20100515_CRW_4074.jpg


And there you have it, one de-meshed MAF...
20100515_CRW_4075.jpg


Fitted it back on the car and did a couple more runs.... got an airflow of 291g/s!!! same setting on the MBC, just a de-meshed MAF...

Not a bad increase for a hours messing about... 270 to 290 g/s :icon_thumright:

There is some discussion on another thread about the validity of this increase and the MAF ability to now accurately measure the airflow now that it can no longer be stabilised by the mesh screen... I am on the fence with this, I am not convinced it would over read the air but under read if anything at all. I will be logging block 001 amongst others to keep an eye on real time ECU correction to fuelling and keeping an eye on long term fuel trims to see if fuel is being removed or added in any great quantities that would back up a misreading MAF.

Hoping to get the new MAF, lambda and finally my EGT probe sorted next weekend if I and of course Bill can find the time.

Car is driving great at the moment, feels stronger than it has done in a long while... I is a happy chappy :happy:

<tuffty/>
 
Last edited:
Looks good Tuffty,
I do love to see you adding more to your thread and S3.I thought you were going to go for a Rs4 MAF?
 
paulypaul said:
I thought you were going to go for a Rs4 MAF?
Click to expand...

I still may do... depends how things go with the large port head etc... when Bill has got his dyno up and running then I will try an RS4 MAF housing to see if there are any gains from it...

<tuffty/>
 
Thats strange, my MAF only had the mesh on the airbox side, was never anything on the TIP side.
 
tufftybloke said:
I still may do... depends how things go with the large port head etc... when Bill has got his dyno up and running then I will try an RS4 MAF housing to see if there are any gains from it...

How is the head getting on,you built it back up yet? have you thought about giving the ports a going over while the valves are out.do you know when is bill getting his rollers?
Click to expand...
 
Head build is waiting on a valve spring compressor at the moment... Bill has a proper VAG one but it has a habit of marking the bores for the followers when used so he is looking into a way around that... when he has that sorted then I will be stripping the old valves out and getting the machining done ready for a clean up and rebuild with new guides and the supertech valves etc...

Not going to 'port' the head but may give it a tickle... will see when its stripped..

Bill has got his dyno but its not set up yet... be another month or so before its sorted tbh as he is very busy atm...

<tuffty/>
 
Small update...

Been using the car this week for work to see how the MBC is working and new MAF... new MAF isn't flowing any more than the previous one since the MBC was fitted... logging on the way to Bill's Monday night I saw 290g/s... on the way home with the new MAF I saw 291g/s which doesn't mean a thing in the grand scheme of things..

Car feels more responsive now even driving around town off boost but on the open road its like a different car... I can only put it down to the wavering boost that was making the car feel lethargic and giving me varying airflow readings as it night and day different now...

As a result I have decided to mount the MBC properly....
20100518_CRW_4082.jpg


...I will be changing the blue pipe for a black one :)
20100518_CRW_4084.jpg


..and of course in keeping with my BT install, stealth/OEM...
20100518_CRW_4085.jpg


Roll on tomorrow when I can drive her again :racer:

<tuffty/>
 
Productive weekend...

Managed to get a chance to finish stripping the large port head ready for a skim and new valve guides...

The OEM tool a bit of a 'tool' to use, Bill has an idea for a rig that will hold the head still and make it easier to use but I couldn't be bothered to wait :)
20100530_IMG00064-20100530-1155.jpg


...inlets are tight, have to be careful not to catch either the follower bore or the cam bearing...
20100530_IMG00065-20100530-1155.jpg


20 ****** valves later!!!
20100530_IMG00068-20100530-1458.jpg


Pulled out the stem seals next, the rubber on these were hard as nails...
20100530_IMG00070-20100530-1458.jpg


All done and ready for cleaning... I will get the machine shop to clean the chambers..
20100530_IMG00072-20100530-1459.jpg


Into the parts washer and looking nice and clean now...
20100530_IMG00075-20100530-1655.jpg


Thats it for now, will give the machine shop a bell this week to see when they can sort the work out for me...

As an aside, Bill has a couple of Mk2 Golfs in at the moment, I have been doing some work on one that has a 1.8t fitted to it and is getting a GT30 and Bill has been playing with the other fitting the very thing that effectively started Badger 5..

20100530_IMG00078-20100530-1755.jpg


...and the money shot...
20100530_IMG00077-20100530-1755.jpg


<tuffty/>
 
Last edited:
You must log in or register to reply here.

Similar threads

deeman88
a3 turbo vs vr6 golf
Replies
5
Views
1K
Customboy
Customboy
S3addict
Audi S3 8l VR6 turbo build!
Replies
80
Views
24K
Ivan Fuentes Hagar
Ivan Fuentes Hagar
Danny Cawsey
Arashi gt35 turbo
Replies
1
Views
1K
superkarl
superkarl
Sevv
My Rather Slow S3 minor modding thread!
Replies
94
Views
10K
Sevv
Sevv
D
Vr6 & G60 kit
Replies
0
Views
702
Deleted member 65282
D
Top
Back