Jump to content
SAU Community

Recommended Posts

The booster does create alot of resistance when there is no vacume. I was surprised when i pulled it appart, how tight all the moving parts were.

I don't see much point in doing it to a road car.

I never had much luck doing the double flares myself ben, how did u go with them? I ended up just taking them down to tas brakes to get done.

Its coming along well though, looking forward to seeing it on the road!

they came up well, i found the key was to tighten the buggery out of the pipe holder, otherwise the pipe slips when you do the first part of the flare.

The booster does create alot of resistance when there is no vacume. I was surprised when i pulled it appart, how tight all the moving parts were.

I don't see much point in doing it to a road car.

what about a track car with numberplates though?? worth doing then??

got a parcel from roy yesterday.

gallery_5985_3354_2095132.jpg

abs unit has been tested and (now) doesn't leak, as it uses bubble flares instead on double flares.

have to brace the buggery out of the brake pedal now, as it's pretty flexy.

I think damo should give up his day job as an auto leccy and become a seamstress. I could see him on the sewing machine punching out overpriced designer dash's.

Good job guys!

id prefer to quit and go into full time race car building. but ill have a go at that to

I haven't really detected any difference between the GTST and GTR stock ABS. neither are super fast but thankfully they are quite lazy (ie quite a high threshold) so on the circuit you will almost never have it cut in at all. on uneven or broken surfaces though (which I'm sure you get plenty of in tarmac rally) they are shithouse. can't cope well at all with low grip tarmac and then you find the sampling rate/pulse speed etc become a problem. for tarmac rally I can see for sure a better unit is a good idea. I'm not sure how much is in the valve body or how much is in the programming and processor power of the ECU. I suspect most of the gain comes in smarter/faster ECUs.

Can I ask a stupid question at this stage?

I have upgraded my brakes to the Brembo size (F40, Brembo rears & larger master cylinder).

The ABS on the R32 was originally pretty ordinary. With the larger brakes it is even worse. Does the povvo pack ABS unit have enough capacity to release the large pistons on the Brembo callipers or do you need a different unit?

I suppose the question is: Is an R32 V-spec ABS unit different to the poverty pack GTR version?

A second dumb question relates to the Vspec ATTESSA unit rate. Can you sling in a later unit from a 33 ie up from 4Hz to 100Hz & does this affect the ABS???

Sorry for the thread hijack.

The pump unit in the 32 series is the same.

My GTR has Porsche 6 pot's on it, and i can still flat spot tyres with it.

I'd put a fair but of thought into a Tarmak Rally GTR, and if wanted to build the best 32, you'd fill it with R33 bits. The ATTESSA PRO ecu is day and night compared to the R32, heaps faster, ABS is heaps more responsive (but not too aggresive) , also feeds torque to the front wheels under brakes (found that from datalogging it) for stability, and a R33 transfer case to handle the higher baseline awd. IMO the biggest problem with the 32 is the old tech ECU's, it was bloody advanced in 1989, but tech came a long way by 1995, i think the pumps are fine, just the ECU that drives them.

A R33 ATTESSA ECU would be well worth doing, as you have better ABS, and AWD. I'm not sure how hard it is to disable to A-LSD in the ATTESSA PRO, cause that's the one you want. Only thing you'd want to consder is if the R32 tranfercase can handle running a little all the time.

On another note, where did you get the rotors for your F40's? Are they 2 peice, and 332mm?

Edited by sav man

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now



  • Similar Content

  • Latest Posts

    • So, I started this repair and got as far as "fixing" the holes with some fibreglass. God all those years working on boats came back quickly. I decided I'd reach out to some rust guys just to see what they would say about it. I came across a guy about 40 mins away and went to see him. He said the windscreen needs to come out, that there might be some more bits around the windscreen and he'd quote them at the time. But his quote was $300 to remove and replace windscreen and $3k for the damage he can see. He said he could respray the roof for $1200 and the bonnet for another $800 (somebody has previously rattle canned it, its horrendous). This is $5300 + any small additional bits. It's a lot, I get that and the name of one of my fave youtube channels 'Not Economically Viable' comes to mind.  I'm not being financially rational, but I've taken him up on the quote. He's opening a new shop in November with more room, so we're waiting for that. I'll leave the currently missing headliner out until then. I'm looking forward to it being fixed and having the paint looking nice again (lots of clear coat issues on the roof too). / flame suit on.
    • Oh and some up-and-comings; New rear drivers wheel bearing. I'll do that this weekend while the diff is out. The car is already up and the d/c axles and missing exhaust will help with space. This is the last bearing for me to do and I've been dragging my feet on it. I also have some new EBC blue stuff pads for the car and some new brake fluid. I haven't ever flushed the fluid in this car and looking forward to it. I have 600 degree fluid to put in. Not exactly "race fluid" but better than the typical stuff I have been using.
    • A proper clutch/plate type mechanical diff with quite a lot of pre-load and high locking % is better for drifting. Much more consistent in its behaviour. A helical can be annoyingly vague and inconsistent in how it responds under the sorts of abuse found in drifting.
    • Some updates here. I pulled the entire interior out, minus some trim to respray the seats with Colourlock dye. It turned out really nice though I accidentally let the dog in the car after and she scratched up the front seat.  This is what it looked like before, the colour was just washing out everywhere but thankfully the leather was in good nic. Then after the respray   And after the bloody dog jumped in The headliner is out waiting to be retrimmed, but it will stay out now until Nov - see why below. I replaced the stereo/headunit with a period-styled Android headunit. I have no after pics, but I'll get some. This is because of the missing pixels. I tried to fix this twice with replacement ribbon cables but couldn't. Also the bluetooth interface I'd bought for this was crap. Then there's the rusty roof. Pics and info in this other thread. I have decided to get this repaired professionally, but I'll update that thread. This is why the headliner will stay out for now. I'll be getting the roof and bonnet resprayed at the same time the rust is fixed. I also had an interesting issue with my drivers door lock.  For a small period I was having issues getting any 12v power to the car - I mean *any*. It would have no dash lights, nothing. It happened while I was at the shops and I couldn't get in the car. So, we had 2 problems. The most pressing here is that I was locked out. I have only a single physical key hole on the car, the drivers door and no amount of turning would unlock the car. Surely it doesn't need power for this? The second issue is why am I losing all power periodically, The battery isn't dead, its almost like the battery isn't even there. Two issues that were surprisingly easy to fix. You fellow BMW over-engineering lovers will appreciate this. The lock in the door has 5 states; mechanical lock, electric lock, neutral, electric unlock, mechanical unlock achieved at -90 degrees, -45 degrees, 0 degrees, 45 degrees and 90 degrees. Although, the unlock is towards the front of the car, so opposite for LHD countries. Sticking the key in and turning 45 left or right is what is used 99% of the time. It activates the central locking etc. 90 degrees is for dead battery access and, obvs, only un/locks the one door. But because the mechanical lock is never used and is 27 years old, it seizes up. I was totally unable to turn the key far enough to get to the mechanical unlock (At the time of locking myself out, I didn't even know this was a thing). I eventually did it with some vicegrips and teflon spray.  I made a quick vid for other E39 peeps.   The battery issue is totally new to me also - It wasn't making sufficient contact between the post and the terminal. The terminal was bolted on tight, but the car wouldn't have power. After checking the battery with my multimeter I accidentally contacted the terminal and the battery post and the car got power. The battery was only a few years old and in good condition. I cleaned the post and the terminal with a wire brush, bolted it back on tight and never had the issue again. I'm still surprised that despite having solid contact it didn't work. Also, the car was getting Warragamba sized pools of water in the back when it rained. My initial concern was another rust problem. But when I went out on Weds while it was raining and while I had no headliner in I could see a steady stream of water coming through the roof mounted aerial. As this aerial is for the (now removed) car phone I pulled it out and whacked a blanking grommet in the hole. It seems fine now. I'm thinking I might get the hole permanently filled when the rust is fixed. Moving forward and things in progress; The tailgate needs some attention. I have taken all the trim off to clean it all and address some small rust spots. I have partially done all of this but I'll finish it up hopefully this weekend. As all the trim are now entirely devoid of trim clips I have bought a heap of strong velcro and I'm hoping it does a good enough job as any of this trim in good condition is super expensive and usually in Europe as we dont have many of the wagons here. Suspension and brakes!!! This is exciting. In the front; New control arms New sway bar links New lower Eibach springs (the only modification I'm planning on this car) M Sport shocks (these came with the car and will replace the longer shocks in the car) New top mounts Used 540i calipers (stock brakes suck!) New 540i disks and pads (22x296 mm for 528 and 30x334 mm for 540i) New front wheel bearings (thank all that is holy for bolt on bearings!) Annnnd in the back; New control arms New sway bar links Adjustable air suspension arms (fool the car into what the current height is so the self levelling suspension can match the new front ride height) New ball joints I'll also be doing a brake fluid flush while I'm in there. I'm planning on switching the car over to the 16's that came with it so I can clean up and respray the M Sport 17's. They've lost a lot of colour over the years and have some gutter rash. None of this will start until the E90 is back.
    • You mean you will regret it for drifting duties? I don't quite follow.
×
×
  • Create New...