The m10....save it or swap it???

[Trise30rally]

I have a rally project car, a 316 lux (m10) the originall plan was to swap the engine for an m42 but after a bit of research i have discovered the m10 is a bit of a legend????

I have noticed it already has a webber carb on it.......

How expensive are they to tune?

What is a realistic horsepower gain from one??

I don't mind completely rebuilding the engine and i am quite up for learning how to polish the ports.........

[MJG]

They are expensive to tune, consider a cam and some headwork and you've already spent £500, then some ebay bike carbs a DIY inlet and exhaust manifold (assuming you can TIG weld aluminium and can fabricate) and you're on for £1k just to get like 140bhp.

It would be great to drive a highly tuned M10, but it's a lot of money when you consider an m42 costs like £500 all in.

[Trise30rally]

Well i have found a ported head with a 292 degree cam for sale for fairly cheap so im half way there!

Would you say the m10 is a more tunable engine than the m42? because as its a rally car the engine will get tuned alot more over the years......

Tell me more about bike carbs?? what are the preffered models to use? are they better than say, using webber DCOE's?? or are they just a cheaper option?

[Trise30rally]

Can no-one else give me any help or links to parts suppliers?

[e21Jason]

Hi

Most supliers are in the USA due to the 02 cult, Ireland enginering, VAC, Korman, Top end perorfance. In the uk Lister Owen can build you a 240hp m10

Jason


Also there was a guide in a back issue of total BMW

[1an]

Hi

Most supliers are in the USA due to the 02 cult, Ireland enginering, VAC, Korman, Top end perorfance. In the uk Lister Owen can build you a 240hp m10

Jason


Also there was a guide in a back issue of total BMW

that would be a serious weapon with that kinda power, is that forced induction though?

[pacerpete]

A Lester Owen M10 will cost you 10 bags ! A 215bhp M30 will cost you £100 i know which route i would be going !

[beefy]

i would go for m30 as i an now doing the same. I would also buy the de copy mounts from for 100 quid.

But if ou wanted a m42 i have one of then for sale 200 quid.

Pm me for more details

[toby]

M10 is a cool little engine.

Have a look at this thread

http://www.e30zone.net/modules.php?name ... ic&t=77729

[maxfield]

M10 is an awesome engine!

100hp per litre N/A is apparently achievable!

Take well to F/I too.

[Trise30rally]

Thanks for the link mate, still doesn't clarify what bike carbs to use though!

I was going to use webber dcoe 45's, do you think these will be better than bike carbs?

[toby]

I know - the fella concerned did mention which carbs he used in another thread but I can't place that at the moment.

Have a look at this thread regarding twin carb setups

http://www.e30zone.net/modules.php?name ... ic&t=18844

[Trise30rally]

Thanks for that mate, i had already seen it but its a really good read!

I think my first engine mods will be a 292 degree schrick cam, twin dcoe carbs, de fan the engine and fit under driven pullies, this should hopefully see me atleast 130 bhp which will be enough for my first years rallying!

What do you guys think?

Where can i get an intake manifold so i can fit the twin carbs?

[toby]

http://www.fritzsbits.co.uk/
I would imagine stock them. Or ask Si316

[Si316]

Thanks for that mate, i had already seen it but its a really good read!

I think my first engine mods will be a 292 degree schrick cam, twin dcoe carbs, de fan the engine and fit under driven pullies, this should hopefully see me atleast 130 bhp which will be enough for my first years rallying!

What do you guys think?

Where can i get an intake manifold so i can fit the twin carbs?

Sounds like a good setup and should see somewere around 100-115bhp on a 1.8 m10.

Keep your eye on german ebay for the inlet manifolds from a 2002ti as those had twin 40 solex carbs.

[zed_head]

I think 4 carbs from a Suzuki GSX-R1000 or 1100 should suffice.
They would be the equivalent of Weber 40's I think.

[essfourteen]

A 2 litre M10 will give a good 135bhp just from a cam and carbs.. headwork can be done at home with a dremmel and with a good ignition setup you can push 150bhp for sensible money.. paint the block and polish the head and it will look like a million dollars compared to the M42!

[Si316]

A 2 litre M10 will give a good 135bhp just from a cam and carbs.. headwork can be done at home with a dremmel and with a good ignition setup you can push 150bhp for sensible money.. paint the block and polish the head and it will look like a million dollars compared to the M42!

Thats exactly what ive done with mine, Just need to sort the ignition out and a 4 branch exhaust manifold.

[essfourteen]

I rest my case!

Nice one,

Nick

[drjim]

If only someone I knew would sell me a 2L M10 block

[e21Jason]

Jim

How about a 2.3l m10 block, s14 botom end modifed to use a m10 head.


Jason

[drjim]

Jason

We meet on all the best forums!

Once I have a certain trackday E21 safely in my workshop, an engine upgrade will be mandatory. Something like that would be very nice, but I fear very expensive! I seem to remember you spending a lot on parts.

Jim

[whipsey]

what sort of power would i be able to get from a 1.8 m10 with little work ?

[drjim]

I had my E21 engine dynoed. So far as I know standard head/valves, added a weber carb., then a fritz stainless manifold.

All detailed on the e21 forum...

http://www.bmwe21.net/forum/viewtopic.p ... highlight=

[pacerpete]

So the moral of the story is don't waste your money on a fritz manifold !

[drjim]

Essentially yes. Some port matching might help, but it doesn't make any significant difference without changing the head. My engine was pretty good to start with, dunno what difference it'd make on something that was in a worse position initially.

The manifold/downpipe are significantly lighter, so maybe that's why the car feels faster!

Jim