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E34 M5 Discussion 1988-1995 Sedan and Touring

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Old 1st December 2012, 12:36   #1
h0pen
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My E34 M5 stroker 4.1L 361whp

Have build a stroker engine in my m5 with Electromotive TecGT enginemanagment.
It got 361Whp/414Wnm

Pics in this post: bimmers.no • Se emne - E34 M5 S38b41 361whp/414wnm

I come back with more info later




Sorry for bad english
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Old 1st December 2012, 17:48   #2
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Hi and welcome to the forum , H0pen .

What a fabulous build ........ I've never seen more than a 3.9 stroker before .

What compression ratio are the pistons and are you using a 96 mm stroke with a 95mm bore ?

Who built your crank ?

What ignition system / ECU are you using ?

What are your experiences of the car with this engine fitted ?

D
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Old 2nd December 2012, 01:18   #3
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My guess is that You are using PPM Australia 4.2 crank ?
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Old 2nd December 2012, 08:28   #4
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Quote:
Originally Posted by BlueBiturbo View Post
My guess is that You are using PPM Australia 4.2 crank ?
I don't believe many owners have completed a build using PPM's kit yet .

This crank doesn't look like one of their's !
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Old 2nd December 2012, 15:05   #5
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Quote:
Originally Posted by davidoli View Post
I don't believe many owners have completed a build using PPM's kit yet .

This crank doesn't look like one of their's !
Is a 4.1 or 4.2 litre stroker is going too far ?

A standard 3.6 has a piston speed of 20.16 metres per second at 7,200rpm, 86mm stroke

3.8 litre is 21.6 at 7,200 (is the rpm limit on the 38B38 the same or lower than the B36 ?), 90mm stroke

This particular 4.1L is 23 m/s at 7,200rpm, 96mm stroke.

4.2 litre 23.5 metres per second at 7,200 , 98mm stroke ???

If you took a 4.2L to 8,000 that would be 26.1 metres per second (assuming a race engine build with a higher rpm limit), formula 1 engines are doing about 27m/s. A race 4.2L would have a life of only a few thousand km at those piston speeds ?

A good discussion here

Engine & fuel engineering - maximum piston speed?



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Old 2nd December 2012, 15:39   #6
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Quote:
Originally Posted by h0pen View Post
Have build a stroker engine in my m5 with Electromotive TecGT enginemanagment.
It got 361Whp/414Wnm

Pics in this post: bimmers.no • Se emne - E34 M5 S38b41 361whp/414wnm

I come back with more info later




Sorry for bad english
Nice engine hOpen
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Old 2nd December 2012, 18:27   #7
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Is 4.2 Litre straight 6 going too far ?

Time will tell .............
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Old 2nd December 2012, 19:20   #8
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Porsche GTS RS 4.0 is 22.11 m/s about the same as the S38B38 , it gets away with 8,250 with a short 80.4mm stroke
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Old 2nd December 2012, 20:11   #9
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Quote:
Originally Posted by davidoli View Post
Hi and welcome to the forum , H0pen .

What a fabulous build ........ I've never seen more than a 3.9 stroker before .

What compression ratio are the pistons and are you using a 96 mm stroke with a 95mm bore ?

Who built your crank ?

What ignition system / ECU are you using ?

What are your experiences of the car with this engine fitted ?

D
Thats right.
Crank is coustom made in sweden.
Ignition/ecu is Electromotive TecGT Total Engine Control TEC GT - Electromotive Engine Controls
Comp is 11,5:1

Havet got oportunity to try the car yet because of the winter.
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Old 5th December 2012, 16:17   #10
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Quote:
Originally Posted by davidoli View Post
Is 4.2 Litre straight 6 going too far ?

Time will tell .............

Jaguar did alright with it for a while.
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