e30 m20 engine modification

[geo_a]

hello i have an m20b27 engine and want to modify it to get to its highest performance any one can help ?

[Speedtouch]

See the Zone Wiki guide for starters:

http://www.e30zone.net/e30zonewiki/inde ... ding_a_2.7

[geo_a]

I want more details about how to get its max power and which cams are the best i don't care about the hydrocarbons test i want max power with hieghest hp of the m20 more details please
And its okay with me to modify anything like head or pistons or anything .... already have flat pistons and 200 head and 2.7 crank ...... 2.5 manifold ... more help please

[Speedtouch]

200 head? Isn't that the very restrictive eta version? Surely, you want either a 731 (320i) or 885 (325i) head for starters, if you want to make decent power...

Schrick high-lift cams are generally considered among the best for the M20.

Simon13 fitted one to his Alpina C2 2.7, and ended up with a very good power output, albeit not before some drama:

http://www.e30zone.net/modules.php?name ... start=2475

So, mind how you go fitting aftermarket cams, seems to be the object lesson...

[blazed]

Have you seen this in the Wiki?
http://www.e30zone.net/e30zonewiki/inde ... ding_a_2.7

[geo_a]

I will modify the 200 head and make it as ( 731 and 885 ) i will make it all bigger from inside and and i will use the flat head piston the one that came on the eta motor 11.0:1
Im confused which schrick cam to use the 292 or biger 304 .... or what ?

[Speedtouch]

Why bother with the 200 head? It has less camshaft bearings, since it was designed for low rev torque, and you'll just be making yourself a load more work and expense, when you could just fit a 731/885 head for instant better results!

As for cam, it all depends on what level of driveabilty you want; if you intend to use the car for street use, you don't want it to run too lumpy and 'all or nothing', or it will be a pain to live with, and also wear out your clutch, gearbox, brakes, etc. quicker; low-down torque is what really counts for most day-to-day driving.

[geo_a]

any ideas about m20b32 ??
i was reading an article someone made m20b32 and tested it on the dyno it gives 732hp is that possible ?

[geo_a]

i want to use the 200 head cz i already have one and i can modify it for free at my friend and i want to keep the 2.7eta tag on the head so if somebody saw the engine thinks that its an eta and not modified

[Speedtouch]

Fair play to you and good luck with getting decent power out of it!

I suppose that an M20B32 with 700 bhp+ is possible, if it's built properly and tuned to within an inch of it's life; after all, they extracted 1,500 bhp from the good old M10 for F1 use, with just half the cubic capacity.

[geo_a]

Any ideas about how to get 700hp+
What do i need ( parts )
And details about assembling so i give them to my garage to build it i want to get 700hp+ i have money i want details
But all i want is to keep the m20 engine
If anyone can help plz thank you

[arrisbmw]

700 bhp . ? don,t think engine could take that. the f1 engine only last 1 race then they fully rebuild it.
unreliable if thats what you want and will the dif and shafts take that amount of power ? and what about the brakes.

[Cloggy Saint]

Seems a bit pointless trying to coax 700 bhp out of an M20. If you want that kind of power I suggest looking for a different lump.

[aimlessrock]

if you have to use an M20 boost may be your best option.

[geo_a]

in your opinion what is the max hp of the m20 without turbo ?

[Speedtouch]

You're generally doing well to get above the 200 bhp mark.

[geo_a]

then for you its the best to use
2.7 eta block
2.7 eta crank
2.7 eta rods
2.7 eta flat head 84mm piston 11.0:1
200 head modified
with 2.5 manifold
and schrick 292 cams
good combo ?
or i can do more ?

[geo_a]

and what do you think about using bigger pistons like the 86mm ?

[reggid]

then for you its the best to use
2.7 eta block
2.7 eta crank
2.7 eta rods
2.7 eta flat head 84mm piston 11.0:1
200 head modified
with 2.5 manifold
and schrick 292 cams
good combo ?
or i can do more ?

none of the parts above are what you should be looking at for maximum hp.

be more specific of how much power you want and what you want to do with the engine

[TriggerFish]

What the Schrick cam even work with the 200 head? I'd assume they'd develop them for the non-ETA heads? Different number of journals and all that...

[geo_a]

then for you its the best to use
2.7 eta block
2.7 eta crank
2.7 eta rods
2.7 eta flat head 84mm piston 11.0:1
200 head modified
with 2.5 manifold
and schrick 292 cams
good combo ?
or i can do more ?

none of the parts above are what you should be looking at for maximum hp.

be more specific of how much power you want and what you want to do with the engine

I want to get as highest hp i can any suggestions of what parts i need ???

[geo_a]

What the Schrick cam even work with the 200 head? I'd assume they'd develop them for the non-ETA heads? Different number of journals and all that...

Abot the 200 head it will be looking as eta from outside but from the inside it will be all modified larger

[Speedtouch]

Yes, but how will you go about increasing the number of camshaft bearings?

To quote the E30 Zone Wiki:

"In the Eta engine, this head was modified, using only four cam bearings rather than seven."

[geo_a]

Yes, but how will you go about increasing the number of camshaft bearings?

To quote the E30 Zone Wiki:

"In the Eta engine, this head was modified, using only four cam bearings rather than seven."

Mmm i don't know i asked a freind he saw it and told me that the cams fits on both ways i will recheck it and let you know

[geo_a]

I took a pic of the head i guess its 7 bearings i ask about it they told me there is 2 kinds of 200 head a big one and small one
One only take eta cams
And one takes the i cams and schrick cam ....
On both ways i took a picture not so clear but i guess if you see it you can know it

[Speedtouch]

Difficult to see from that pic whether it has seven bearings or four...

[geo_a]

so you have a pic of 4 and 7 just to see the deference between them so i can know where to look

[geo_a]

https://photos.app.goo.gl/RQi263TvQwqzbsAr7
Is that called a bearing ?

If yes there is 7 of it in there

https://photos.app.goo.gl/fHYsMuKSeE66AcDc6

[Speedtouch]

Possibly, but note, according the Zone Wiki:

"The M20B27 "eta" cam uses 4 out of the 7 cam bearings, the 3 unused bearing housings don't have the oil feed drilled into the head from the rocker shaft. the eta cam is extremely mild and has a lot less lift."

Best way to find out for sure, particularly if you intend to uprate it, is to remove the cam...

Perhaps you can then drill the extra oil feeds, if need be...