2.9lt powa (Exhaust vid inside)

[SA E30]

Just looking at it... dunno why the date is out of whack... but was looking at my mates one, and it has the same date... guess it's not setup.

[SA E30]

Here is my dyno sheet... but not the one where I made 161... can't find that one.

[SA E30]

I found my friends dyno sheet... from a stock bottom end 325iS Evo 2 ... but can't find mine.

2.7lt bottom end, with 288 cam, and skimmed head, and higher fuel pressure.

[nando]

s50 and s52 US version use bearing sizes the same as M20 M50 etc etc but the true s50b30 and s50b32 (euro m3) are different.

yeah, the S50us rods have the same dimensions as the M20 and M50.

I want to dyno my car soon..

[SA E30]

Damn can't remember the name of my mates dyno... but a lot of ppl use them here in SA.

It's a Load dyno... but the power was made in Innertia mode... torque was 250 odd NM, I can't remember.

I must try and dig up my dyno sheet... it's around somewhere.

[digger]

Haha, cool man :)

Aren't the big ends on the S50 cranks bigger than a normal BMW crank ? Unless the US motor is different... I know that the Small end bushes are smaller, cause the gudeon pin on the Motorsport pistons is smaller than a normal BMW crank.

Currently got a 3.92 open diff in the car... but got a 3.64 LSD lying at home... will go on when I do the short shifter, and the new springs and shocks.

Dunno, why our cars seem 2 make more power than u guys... it's weird.

Another thing... a guy I know is busy building a 2.8lt stroker, with ITB's and everything u can think of... he wants 300hp on the wheels... N/A so it will be seen if it can be done.

Then he is chopping the roof off and putting a CF one onto the car... he wants 2 get it to about 900kg... Granted it's a track car, but still insane.

Then when money isn't an option... great things can be done... His everyday car is a M3 CSL.

Digger, stock it made 89wkw

s50 and s52 US version use bearing sizes the same as M20 M50 etc etc but the true s50b30 and s50b32 (euro m3) are different.

I was going to say that the different dynos account for the different dyno figures for SA compared to the rest of the world but 89rwkw stock (assuming it started as a 325i) is actually a slightly lowish number. In Oz we predominantly use Dyno dynamics which are known to produce lower power numbers and much lower torque numbers (particulary for high hp cars)than dyna pack, dynojet and mustang etc etc. A typical e30 325i will make around 100rwkw (135rwhp) +/- and a alpina 2.7 or a good backyard 2.7 stroker or e36 325i would probably make around 120-125kw (165rwhp) while an e36 m3 will make from 165rwkw (220rwhp) upto 180rwkw (240rwhp) as ballpark figures.

A good measure of hp is also trapspeed. With 161 rwkw you should be trapping in the low 100's

[SA E30]

Haha, cool man :)

Aren't the big ends on the S50 cranks bigger than a normal BMW crank ? Unless the US motor is different... I know that the Small end bushes are smaller, cause the gudeon pin on the Motorsport pistons is smaller than a normal BMW crank.

Currently got a 3.92 open diff in the car... but got a 3.64 LSD lying at home... will go on when I do the short shifter, and the new springs and shocks.

Dunno, why our cars seem 2 make more power than u guys... it's weird.

Another thing... a guy I know is busy building a 2.8lt stroker, with ITB's and everything u can think of... he wants 300hp on the wheels... N/A so it will be seen if it can be done.

Then he is chopping the roof off and putting a CF one onto the car... he wants 2 get it to about 900kg... Granted it's a track car, but still insane.

Then when money isn't an option... great things can be done... His everyday car is a M3 CSL.

Digger, stock it made 89wkw

[nando]

the rods are 135mm, same as the M20B25

that's pretty quick.. what rear differential are you using? my car isn't tuned yet either, still using stock motronic with a bavauto chip designed for a stock motor, and a completely stock induction system from the airbox to the intake manifold. it's still a blast though, it's a bit wierd feeling the rear wheels break loose a little bit in a straight line on dry pavement in an AWD car. :D

[SA E30]

Well, the car isn't tuned at all... so yeah, when done It should... it's running really rich ATM, guess it's better than lean.

[digger]

What length r those rods ?

Just for interest sake, was at the racing last night... ran a Audi A4 2.0lt Turbo over about a Mile (roughly 1.6km) put about 1 car length on him... was impressed. This is still untuned.

Also raced my friends 2.8lt , but spanked him...

I would of thought that you would spank the audi...........161rwkw (210 crank kw) is what a Euro 3.0L M3's make on the dynos over here.

[SA E30]

What length r those rods ?

Just for interest sake, was at the racing last night... ran a Audi A4 2.0lt Turbo over about a Mile (roughly 1.6km) put about 1 car length on him... was impressed. This is still untuned.

Also raced my friends 2.8lt , but spanked him...

[nando]

On the wheels...

I'm gonna use forged pistons... Not sure what make yet, most probably some Custom Arias ones. Also wanna bump the CR to around 11.5:1 ... think thats about as high as I want 2 go on a street motor.

What rods did u use ?

S50US. in total with the forged pistons it's about 3lbs less rotational mass than the stock M20B25. :)

I would love to have 200whp, but nobody in the states seems to get there, jordan was closest with 197!

oh yeah for an easy conversion, google works for pretty much everything (and you can even do it from your cell phone):

http://www.google.com/search?hl=en&q=161kilowatts+to+hp&btnG=Google+Search

[Ray Smoodiver]

I want one!

(getting bored of 2.7 powa)

[Garageaholic]

FYI, that's about 215hp to the wheels.. Not too shabby

[Gus]

http://www.onlineconversion.com/ for the dude above me

i like your SA n/a m20's, quite inspiring