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Forum LockedMost effective engine mods on E30 M3?
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Jonners View Drop Down
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Points: 601 		Direct Link To This Post Posted: 04-March-2004 at 14:38
I thought the sodium filled exhaust valves were only fitted to Evo Sport, and they're bigger too

is that right??
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piratepete View Drop Down
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Points: 71 		Direct Link To This Post Posted: 04-March-2004 at 20:51

 Probably being a bit dense here but dont split second manufacture a maff wire kit for the e30m3 priced around £600.

Also i believe thaybot evo sports have standard valve sizes. Did not the GPa spec valves also stick with the standard size and if so is there any point in going bigger.

 ps I have taken off my new 284/276 cams after only 200 miles due to problems of clearence with the skimmed head. And if anybody wants them i can bring them to rockingham for £650.

 
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UweM3 View Drop Down
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Points: 5445 		Direct Link To This Post Posted: 04-March-2004 at 21:12
pete, how much is your clearance? Can't you machine the pistons to match. I know this is causing some more work,
but belive me it's well worth the effort.
E61 520d, slow and buzzy but my wallet likes the mpg.....
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Points: 707 		Direct Link To This Post Posted: 04-March-2004 at 21:42
Split second? Who?
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UweM3 View Drop Down
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Points: 5445 		Direct Link To This Post Posted: 04-March-2004 at 22:59
Andyboy, I have driven an M3 with the Splitsecond kit.
Even if the quality of the kit is second to none I wasn't very impressed with the performance. Just not enough bang for the bucks IMO. you still need a remap to get the full potential out of the MAF. I am sure if Andy O'Hara is reading this topic he can give some first hand expericence as he has owned a kit himself. He replaced it with a real Alpha-N (Motec)
here is the link
Split Second

Edited by UweM3
E61 520d, slow and buzzy but my wallet likes the mpg.....
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John W View Drop Down
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Points: 630 		Direct Link To This Post Posted: 05-March-2004 at 00:42
The Split second mass air flow (MAF) conversion was tried by Andy O'Hara. It is the same as the hot film conversion that AMD and others do for 911s. The problem is it cannot be mapped in real time, so I would ignore it.
Put simply, if you want rid of your air flow meter (AFM) go for an alpha-N solution like MoTec and don't bother with MAF solutions like Split Second.
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Jonners View Drop Down
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Points: 601 		Direct Link To This Post Posted: 05-March-2004 at 12:11
just going back to valve sizes and pirate pete's comment, i thought group a required standard valve sizes which is why bigger ones (which were sodium filled) were homologated on the sport??

anyone know for sure??
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Jonners View Drop Down
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Points: 601 		Direct Link To This Post Posted: 05-March-2004 at 12:25
http://www.e30m3performance.com/tech_articles/engine-tech/e34m5_valve/index.htm

This is what has got me thinking - Sport intake valves are bigger - stupid of me to think it would have been the exhaust, but i think it's the exhaust valves that are sodium 'cooled'

if you want bigger intakes valves, something's easily available, but against that the throttle bodies, bore and exhaust are already bigger on the Sport so in itself on a non Sport engine p'haps too much for too little

still interested to hear if anyone can confirm re bigger Sport valves and sodium??http://www.e30m3performance.com/tech_articles/engine-tech/e34m5_valve/index.htm

damn this hyperlink thing - can't work it
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M3Nally View Drop Down
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Points: 1302 		Direct Link To This Post Posted: 05-March-2004 at 14:16
I am sure i read an old marketing brochure when i had my first Evo2 that the valves were sodium filled for better cooling.

The inlet valves on Sport Evo are larger at 38.5 mm instead of the regular 38mm. I'll see if I can find out how big the Evo2 valves are, unless anyone knows.

Sport Evo cam duration is longer at 282 from 264

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UweM3 View Drop Down
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Points: 5445 		Direct Link To This Post Posted: 05-March-2004 at 15:13
Sport EVO:
Inlet Valves 38.5 mm (38 for the rest of the M3 world)
Exhaust Valves : Natruim filled
Inlet cam: 272 deg

Source: BMW Press Bulletin

Edited by UweM3
E61 520d, slow and buzzy but my wallet likes the mpg.....
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therealmccoy View Drop Down
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Points: 552 		Direct Link To This Post Posted: 05-March-2004 at 15:50
To solve the "flap" problem on the standard AFM, I had heard that an American spec E36 3.0 M3 has no flap, and is interchangeable with the standard. Only makes an estimated 10BHP, but cheeper than the full blown conversion.

Not sure if this is true or not, anyone heard anything else??

James
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adwo View Drop Down
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Points: 209 		Direct Link To This Post Posted: 05-March-2004 at 23:38

Originally posted by therealmccoy therealmccoy wrote:

To solve the "flap" problem on the standard AFM, I had heard that an American spec E36 3.0 M3 has no flap, and is interchangeable with the standard. Only makes an estimated 10BHP, but cheeper than the full blown conversion.

Not sure if this is true or not, anyone heard anything else??

James

 

It's not true, the E36 M3 engine has no AFM, but a MAF sensor...

(yes, I know: also the american version has a MAF sensor. Americans go to the EURO E36 M3 MAF on their american E36 M3 because of the bigger intake size, that brings about 10 HP).

Adwo
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therealmccoy View Drop Down
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Points: 552 		Direct Link To This Post Posted: 06-March-2004 at 10:56

 


It's not true, the E36 M3 engine has no AFM, but a MAF sensor...


(yes, I know: also the american version has a MAF sensor. Americans go to the EURO E36 M3 MAF on their american E36 M3 because of the bigger intake size, that brings about 10 HP).


Adwo

[/QUOTE]

Ah, so I was half right then (power)

Cheers,
James
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E30 M3, The REAL McCoy!

89 M3 Now Sold

99 323i *FOR SALE*

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