Author Topic: any body have have info on the S42 race engines (Read 4104 times)

steve321 · « **on:** March 04, 2007, 05:13:14 AM »

i have hunted all round the internet and never been able to find any thing, just wondered if anybody new some good site with reference to them, also i'd like to see some pics.

steve
________
South American Recipes

cecotto · « **Reply #1 on:** March 04, 2007, 05:46:12 AM »

Here you have some details:
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S 42 details:
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Some interesting data on the S42 (Version: 08/1995):
* Stroke = 85mm
* Bore = 86.5mm
* Compression ratio = 12.4:1
* Total displacement = 1.997ccm
* Rod length = 145mm
* Inlet cam = 312 degrees (spread: 94) (E�=40, Es=48 (@ 2mm lift) )
* Exhaust cam = 304 degrees (spread: 98) (A�=45, As=28 (@ 2mm lift) )
* Inlet Valve diameter = 35mm
* Exhaust valve diameter = 32mm
* Inlet port metrics: W=52mm, H=29.7, Radius=14.85mm
* Slide throttle diameter = 46mm
* Header = 4-2
* ECU = ECU4A.1
* Power DIN 70020 = 285PS / 207kw @ 8300rpm
* Torque DIN 70020 = 245Nm @ 7000rpm
* Max rpm = 8500rpm (FIA regulation "SuperTouring")
* Gasoline quality = Super Plus (Oktan min. ROZ 98)

Regulation says that fuel must be commercial petrol which comes from a service
station pump, without any additive other than that of a lubricant on current sale.
The fuel must be approved by the ASN and must have the following characteristics:
102 RON and 90 MON maximum, 95 RON and 85 MON minimum for unleaded.
100 RON and 92 MON maximum, 97 RON and 86 MON minimum for leaded fuel.
---------------------------------------------------------------------------------

The engine changed a lot in it's life cycle, where it eventually ended up on a aloy nicasil engine block, this is a indicator of how competitive the series was. However the first versions was on a cast iron block.

Also the entire cooling system was "re-wired" to a cross-flow design, where it had a distribution pipe below the intake ports which sends coolant directly to the individual cylinders. The path on a standard engine is different, it goes through the block first and then to the head.

The oil system is is a drysump setup.

These parts are the same, from memory (S42 (Version: 08/1995)):
* Oil squirters
* Crank sprocket
* Cam sprockets
* Chain
* All the guide- and tension rails
* The cam bearingledges caps (which tells me that you could fit the cams on the stock head) in other words the cam bearing diameter is the same.
* Cylinder head bolts
* Main bearing bots

I have some more info on it but it's in paper form, but nothing really interesting only tightening torques, partnumbers and some diagrams, and technical data..

silverblades181 · « **Reply #2 on:** March 04, 2007, 09:56:48 AM »

Wow, where did you get all that data?

cecotto · « **Reply #3 on:** March 04, 2007, 12:09:22 PM »

The info comes from BMW papers which i got my hands on a couple of years ago. But as i said above. I posted the most interesting data above, the rest is just a bunch of partnumbers, diagrams, tightening torques, and technical specifications. Interesting bed-side reading but really nothing a hobby builder on a budget can use for anything important (my opinion).

It's worth looking closer at the inlet port data, try compareing this to a standard port.. And you will see that the port entrance is pretty much the same size, of cource the deeper port on the S42 is machined for flowing more air. But i think this shows that the M42 has good potential to be a fun engine.

steve321 · « **Reply #4 on:** March 04, 2007, 01:55:42 PM »

i'd like some pics of the head (inlet mainly) in fact it could be the inlet on any race/highly tuned engine, i want to compair it to the head work i am doing, so i have somthing to go by.

stev
________
Fishnet

cecotto · « **Reply #5 on:** March 04, 2007, 02:43:01 PM »

I cant help you with pics as i dont have them. I wish i did though

Try visiting http://www.s14power.com there you will be able to see images of various gr. A and DTM ports.

swiss318is · « **Reply #6 on:** January 25, 2008, 05:55:09 AM »

hy.. i have a s42 engine near my house and i will make some pictures as soon as i go visit them.

kowalski · « **Reply #7 on:** January 25, 2008, 01:41:46 PM »

Quote from: swiss318is;41667

hy.. i have a s42 engine near my house and i will make some pictures as soon as i go visit them.

why don't you already have pics:confused:

beegeezy · « **Reply #8 on:** January 25, 2008, 03:03:05 PM »

Quote from: kowalski;41692

why don't you already have pics:confused:

Hahaha, and yea?!?!?!

swiss318is · « **Reply #9 on:** January 27, 2008, 07:18:48 AM »

i didnt find the time to visit him..!but i hope i can go there this week!!....the last time i was there i didnt have a camera..!!but know i bought a sony digicam.the last time i was only sitting in the car...!!

be patient my friends!!

you will see, i am not telling shit!!!

the s42 engine is mounted in an 320i e36 '94 STW car (what i know it was the last evolution step with all the sick bmw-motorsport parts on it)

swiss318is · « **Reply #10 on:** February 13, 2008, 11:14:57 AM »

Quote from: beegeezy;41698

Hahaha, and yea?!?!?!

and??? you two funny people!? have you already been in the s42 race engine thread??