135i Big Turbo Build

Girevik77

Active member
Update:

Leon let me know yesterday that all the little bits are sorted now. The bumper is fitting better, 2-step relay and cdv are in as well.
Also we are going to load up the latest big turbo firmware this week.

FR&R are hosting a dyno day this Saturday, I'm putting my car on the rollers with some good fuel hoping to take a crack at 600WHP.
 

Girevik77

Active member
I popped my racing cherry this weekend at Drag Wars held at Tarlton. The car is still plagued with clutch issues so I kept the boost at 20psi, which with the mix that was in the tank was good for about ~530 Whp.

On my arrival emotions ranged from fear, excitement and nervousness. Shortly after the drivers briefing I lined up for my first ever run. I had no idea how to do a burnout in a rwd car so I just lined up. I staged built up the rpm, green light and.... bogged. Traction control was still on :withStu::crazylaugh:

My second run didn't go any better, after lighting up the tires through first and second I short shifted into third and fell out of boost. When the turbo did eventually spool it lit the tires up again and put me sideways doing about 130km/h. Somehow I got it back in a straight line :tiptoe:.

After that I almost called it quits. But after the car cooled down I decided to line up again. From there on things went better. I decided a burnout, however small, is definitely necessary. Eventually it turned out that it would not be my clutch that would prevent me from putting up any kind of competitive time but traction. The clutch held up for the whole event. I ran about 8 times and I launched from 5k rpm every time, and no slipping from the clutch. But as I said traction was my biggest issue, launches were ok but wheel spin through second and most of third was killing me.

By no means am I blaming the car, I am well aware that my driving skill, or lack thereof leaves much to be desired. But hey you gotta start somewhere.

My best time for the day ended up a 13.04s exit speed did not register on that run but on other runs they were all around the high 180's to low 190's. 60ft times were all around around 2.3-2.6s.

I'm now focusing on replacing the clutch and then i want to do some suspension and drive train mods to see if I can start putting the power down more effectively.

I also want to try a few 1km runs at ODI.
 

Kish2604

Administrator
Staff member
Well done for a track novice experience... Do yourself a favour and get a set of 17inch hoosiers and that will be the end of your traction issues...
 

gavsadler

///Member
Kudos to you for partaking in your first race down the strip in a 500whp+ car

Things will improve I am sure. Looking forward to the updates
 

Girevik77

Active member
I've been neglecting the thread for a while. Mostly because everything was well. I'm completely addicted to driving this car. The power is intoxicating. Lower boost map (15Psi) is a lot of fun and the screamer pipe sounds so good. From there upward things get serious, on the 20psi map things actually get menacing. The car feels so fast, and whether I'm running semi's or not the back end becomes a handful even in 3rd. I don't think road tyres will ever be an option for me again.

Alas the joy is over for a while. Clutch issues have now become severe. The clutch is slipping in every gear other than 1st. When the clutch problems started I could normally drive a bit till the clutch warms up and it would bite again. Not anymore I do believe it's completely shot now. So she's with Leon at FR&R again.

After a chat with Formula Friction, ADF and a few other gents running big power X35's. I've decided to go with the clutch from a 330d. Clutch and pressure plate are ready at the shop. We'll have a look at the condition of the flywheel once she's open and then I'll decide to go SMF or stick with the stock DMF.

Anyone know where I can source some polyurethane bushes? I need to start working the suspension and drive train if I want a hope of putting the power down more effectively. Especially now that the clutch is no longer going to be the weak link.
 

moranor@axis

///Member
Official Advertiser
give me a shout on suspension and bushings the anti squat can be adjusted this should help a little as well as some adjustable dampers

pop me a PM
 

Girevik77

Active member
moranor@axis said:
give me a shout on suspension and bushings the anti squat can be adjusted this should help a little as well as some adjustable dampers

pop me a PM

Will do!! Thanks bud!
 

Girevik77

Active member
The 330d Clutch is in. The stock DMF was still in good condition so we decided to leave that for now.
I have to admit I was a bit skeptic about the 330d clutch on the N54 at first, but after driving the car the thoughts have all but gone. It feels very smooth and drives just like the old OEM clutch. I did about 300 km on the clutch this weekend, I'm keeping the car on low boost (Map 1 - Wastegate spring pressure, also safety map) for now and will increase boost systematically to run in the clutch.

Also we loaded the new BT firmware onto the JB. Maps are now

Map 0: Disables JB
Map 1: Wastegate spring, also safety map (~ 12 Psi with current spring)
Map 2: 17 Psi
Map 3: 20 Psi
Map 4: 23 Psi
Map 5: 26 Psi
Map 6: User definable
Map 7: 28 Psi
Map 8: Meth progression from 17 to 30Psi :skit:

It's probably just in my head but the car does feel ever so slightly more responsive with the new firmware, only time will tell if this is the case.

Once the clutch is properly run/bedded in we can put her on the Dyno and really start cranking up the power. The first time we targeted 600 WHP is when my clutch issues started. Now hopefully we can reach the goal :rollsmile:
 

Girevik77

Active member
Rowen@CleanCarTechnologies said:
Is the fueling fine?

So far I'm still messing around with eth and NF mixes. I need to invest in some proper high octane fuel.
I've got the Stage 2 walbro LPFP installed and so far it looks like my HPFP is holding up with eth mixes as high as 50%.
 

Girevik77

Active member
I want to make some good videos to post. Just need to get my hands on a mates go-pro for a weekend.
Once I start boosting on the new clutch I will post some vids of the acceleration in 3rd and 4th.

The next mods to go on the car will be poly bush set, Koni dampers, drag bags, fresh set of Yoki Neovas for daily driving and a set of Hoosiers for the track. Not too long after all that an LSD :rollsmile:

Thank you for all the interest guys, I hope you have enjoyed the thread so far. I will try and keep it exciting and give updates as often as I can.
:ty:
 

Shabz

///Member
I think I may have spotted you last night passing the rocco mammas close to Monte. If it was you, your car sounds demonic dude!
 

Girevik77

Active member
///Shabz said:
I think I may have spotted you last night passing the rocco mammas close to Monte. If it was you, your car sounds demonic dude!

Howsit bud, It wasn't me. I haven't been in JHB this week.

Maybe one of my mates got into my garage and took her for a joy ride. :roflol:


I went on the Fanatics breakfast run on Sunday and thoroughly enjoyed it. It was only my second Fanatics event so I met a lot of new faces that I could match up to forum names.

On the drive I had my JB4 app running and I experienced odd misfires when maintaining speed at partial throttle. Once I lift off or accelerate the misfire would stop immediately. After logging some of the events and looking through the codes with KRS24, he advised I replace my O2 sensors as it seems they are on the way out.

I was running the car on 17Psi with 95 and meth. With Avg Ign sitting around 2.
 

Girevik77

Active member
Let me start by wishing all the Fanatics a very happy and prosperous 2016.

Very little happened on the car over the holiday season. Since my last post I sourced two brand new O2 sensors and the misfire issues were gone.

Mechanically the car is still running very well, no issues, problems or concerns to report. The new clutch is holding up well so we are planning to start the accent to 600 WHP yet again.

Short term plans are a set of NGK 5992 plugs. And I've been in contact with Moranor for a set of Koni dampers front and rear, Poly bush kit and some drag bags.

Also I'm looking for a new front bumper we butchered the original a bit to make everything fit. It doesn't look terrible but I'm not happy with the front end. I have considered 1M style front bumper but I would really like something slightly more subtle. The sleeper look really appeals to me.

Here's a link to the style bumper I would really like to get my hands on

http://www.bmwfanatics.co.za/showthread.php?tid=71656
 
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