BMEP

Improve...... Here is a little more info...... http://www.bimmersport.co.nz/forums/index....c=23958&hl= DrphTa, I'm in Sydney.

Just an update for those interested in this topic, I’ve had been pushing 13psi boost threw the stock S50B30 on pump fuel for approx 3,500kms and the head gasket finally let go. However I believe that the head gasket could have contained the Cyl pressure for a longer period of time (how long I don’t know) had the previous owner of the car regularly changed the coolant every two years as it was evident when i disassembled the engine that there was corrosion/rust of the head gaskets inner steel frame that would have aided in supporting the fire ring as can been seen in the pic…… The pistons ring lands looked fine with evidence of blow by past the top and second rings. When I removed the rings it was obvious that the rings had lost tension hence the blow by. I’d say that the rings had lost tension due to the steel/materials used in the OEM rings not being up to the task of handling the added cylinder temps in turbocharged form and loosing tension over time. My disclaimer…Before anyone decided to rush out and push 13psi boost threw a stock S50B30 keep in mind that I have been Pro tuning for over 15 years. There is no doubt engine longevity is heavily influenced by the tune so don’t go trying to blame me if you hurt the engine. I’m mentioning this as I have seen people hurt engines at 5 psi boost due to poor tuning.

FrantiC, Yes i'm happy with that power......for now. When I purchased the car in N/A stock form, I asked the previous owner about the clutch and he did mention it was stock and sure enough when I removed it, it was stock. I have fitted a “South Bend†clutch kit from the States. It consist of an upgraded pressure plate, clutch plate and bearing. I had the OEM dual mass flywheel refaced and have reused it. I did contemplate going to an alloy flywheel set up however the few people I have spoken to that have alloy flywheels in their E36 M3's were displeased with the low speed drive-ability and rattling noise at idle from the gearbox. I am well aware that the alloy flywheel will aid in reducing the rotating mass however I am more than happy with the smooth and quiet idle the dual mass flywheel offers as well as the low speed drive-ability. The South Bend clutch has a nice “Bitey†feel to it and is very drive-able with a decent amount of elevated clutch peddle pressure over the stock clutch.

Hi All, Thought id pass on an update for the guys that have an interest in my boosted S50B30 project...... A few weeks ago I decided to fit larger fuel injectors in anticipation of the rebuild and therefore had to retune the fuel side of things and while I was at it I decided to run the engine up to 10psi boost (from the 8psi I was running). I initially intentionally set all the 10psi ignition load cells at a conservative (retarded) ignition advance to allow me to get a feel of how the engine responds to ignition advance at 10psi boost as well as listen for knock at the same time as I sneak up on the tune. On the first power run at 10psi the engine made 402rwhp (up from the 397 @ 8psi). The small gain was expected due to the lack of ign advance. I then added 2 deg of timing at all the 10psi load cells and the car made 426rwhp however it sounded like the engine rpm was flaring during the run indicating clutch slip. I then added another 2 deg of ign advance at all 10psi load cells and the engine made it to 4,500rpm before killing the clutch. I had a look at the data logs from the 426rwhp run and it confirmed that the engine rpm was not correlating to the road speed input (taken from the diff) when I did an insert overlay of the rpm vs road speed in the Autronic data log so the dyno sheet posted is not really what the engine truly made but at least its an indication. I have since fitted an upgraded clutch and have been told I need to do at last 1,000 kms of normal city driving to bed the clutch in properly. Once this has been done I will hit the dyno again to complete the tune properly. Depending on the air temp on the day (by then the weather will be hotter) I would guess that there is an honest 435-440rwhp at 10psi in non-shoot out mode. I will also give the car a run in shoot out mode as well and as a guess I would say that it should see 420-425rwhp in shoot out mode at 10psi boot. Unfortunately I have a lot on my plate at the moment and it may take me a few months before I have clocked up 1,000 kms of city driving. Once I have completed my 1,000 kms and have completed the tune I will keep you guys posted of the results......

Chris, As Ollie mentioned, my Saff had an Autronic SM4 ecu as well as a 500R CDI. The car ran a best of 11.36 @ 125mph on street slick type tyres on pump fuel and a T28 turbo. If you read threw the Passion Ford link Ollie posted there is much more info. Hi Ollie, Great to hear from you When did you sell your Saff? I sold mine in March of 2008 after owning it for 12 years!!!!!! I had an offer i could not refuse hence selling it and staring all over again with the M3.

Thanks for the comments guys, I'm Happy you guys like the car/mods...... My target HP goal is approx 500-520rwhp once the engine is built. I have no doubt i can easily far exceed this goal with the hardware i am using however even now with a little less than 400rwhp and using soft compound 255/40/17 Falken Azenis on the rear BMW 8.5 x 17 Motorsport Wheels i have no traction in 1st or 2nd gear. I can only imagine what it would be like with an extra 100rwhp! The car has been fitted with AP Racing 330mm 4 Pot brakes up front and i have already fitted a complete 3.2lt M3 rear end to the car. The 3.2lt rear ends have a much larger/stronger diff. The rear of the car has also had additional strengthening via plates welded in during the fitment of the 3.2 lt rear end. Yes there is a Ploycarbonate "Sight Glass" fitted to the end of the intake manifold. I originally used that design on my previous ride (a Sierra Cosworth) to be able to veiw the "smoke testing" in the plenum we were doing on the dyno at the time. I simply used the same concept on the M3 as well as it always gets alot of attention at shows etc. Everything has been planned in advance for the rebuild/elevated boost/power. The engine also runs an Autronic 500R CDI that fires 6 High Energy Split Fire Coils. I have used these coils before on plenty of high boost (30psi) GTR (RB26 Engines) with great results. Split Fire Coils...... AP Brakes...... My Previous Ride......

Done!

Thanks for the comments Guy’s. Bellicose, I’m located in Sydney. On 8psi boost it makes 397rhwp on a Dyno Dynamics Dyno. I also gave the car a run in shootout mode (some people say that shootout mode is the NON FUDGE power) and in shootout it made 385rwhp at 8psi. Boost Junky, Here are a few pics of the install from underneath. We initially simply continued from where the OEM pipes end as pictured below. We initially did this due to time constraints as the car had to pass an IM240 Emission test for the Engineers report that the car did pass. In the next few weeks we will be making a new Exhaust manifold to reduce the pipe length to the turbo. I will be also fitting 6 individual pyro’s that will allow me to trim each individual Cyl via the Autronic .Thus far I have purchased some Carrillo rods, JE pistons, Racetech Valve springs, Inconel Exh and Stainless Int valves, APR head and mains studs and am just working out what head gasket I will end up using before I finally remove/rebuild/replace the engine. 3.5†dump pipe…… That then continues into a twin 2.5†system with twin High Flow Cats…… Under car pic of the pipe work from the OEM pipes into the turbo…… Dyno Run Non-Shoot out mode…… Dyno Run Shoot out mode……

Hi Guys, I thought id post up my E36 M3 Turbo. It's a totally standard engine running an Autronic SM4 with complete Vanos control, GT35 Turbo, Tial External w/gate, 3.5" dump pipe splitting into a twin 2.5" system, Custom made Intake manifold, twin in tank Walbro pumps, Sard fuel pressure reg, and PWR intercooler. The car was purchased in March of 2008 with the sole intention of turbo charging it. I'm well aware of the benefits of mounting the turbo on the Exh side and really wanted to achieve this, however being right hand drive the option of mounting the turbo at the lower rear of the engine on the Exh side was not an option due to the steering shaft being in the way (Grrrrrrrr!). Top mounting the turbo was also out of the question, as the dump pipe would also need to pass by the steering shaft and not to mention the possible removal of the air conditioning being required. As the car is used as a GENUNINE street car I wanted to retain the air con and reluctantly decided to mount the turbo on the intake side. The turbo as well as the 3.5" dump pipe has been covered in a heat blanket to help retain as much heat as possible and at the same time to prevent elevated intake air temps. The Autronic was fitted while it was N/A so I could play around with the Vanos settings to get a better feel for the engine and to see what settings would net what results. I was surprised to note that when the turbo was fitted that the intake air temps where similar if not slightly lower than when it was N/A. No doubt this would be attributed to the intercooler once engine speed (therefore air speed) was increased. The car has covered approx 6,000kms since being turbocharged. I run 8psi boost for the moment and the plan is to rebuild the motor in the future with forged internals (Rods, Pistons, Studs etc) to be able to run up to 25-30psi boost! Twin in-tank fuel pumps…… Tial External Waste Gate…… Engine Bay……

I'm in Australia. Happy to post pics as i have posted on other forums. Is it preferable to post pics here or perhaps start a new thread in the "Show Room" ?

Thanks for the feed back/info guys. My M3 has covered approx 6,000kms since being boosted to 8psi with no problem what so ever. I was hoping to find a definitive answer to how much boost these engines (S50B30) can contain with a decent tune (No Det. correct A/F) before i decided to possibly elevate the boost to 10psi on the stock engine.

Thanks for the reply. To answer your questions, The engine is stock so the comp is 10.8 to 1. Being the engine is stock the head gasket is also stock. As for boost level...well that is my question. What is the highest boost anyone has run on a totally stock engine and what HP did they yeild at that given boost? HP goal......, well at this stage there is not a goal, it will be dictated by the stock engines limits. And finally it runs stock head bolts as mentioned it is a stock engine.

Hi Guys, Does anyone know what the maximum safe boost/power limit is if you were to turbocharge a E36 M3 S50B30 engine? My question is in reference to an approx 65,000-70,000Kms engine that has been well maintained. It goes without saying that i am referring to a detonation free/correct target A/F tune. Thanks.