The ultimate M20 cylinder head

[oakey]

What would be the ultimate cylinder head for an M20 to get as much power as possible?

Bigger Valves?
Gas flowing?
Valve springs?
Port sizes?
Camshaft?
Anything else?

You get the idea- i hope

I'm not all that knowledgeable on this so please educate me
The car will be running on MS with ITBs and the bottom and is a 2.7 built with custom pistons if thats any use

[Gunni]

An M50 head.

But for what reason do you want this ultimate head?

A super worked 2.7 could manage about 280bhp at 9krpm, is that of use to you?
note that it would cost insane money and have 0 low end torque and the on cam rpm point
will be like a NOS trigger.

Best way would be turbo to be honest or an engine swap

your looking at about 3-4k into the head alone.
And the engine would still only be a M20 12valve.

[Simon13]

a racing dynamics 24v head would be a good start but they only cast 7.

Dave decide what you actually want from the engine first!

[oakey]

I want as much top end power as possible, it wont be revving much higher than 7k. Not too fussed about low down torque- I want a change from the low down grunt and not much top end. Obviously I'm not after a full race engine

Ok perhaps 'ultimate' was the wrong word

Never heard about these 24v heads! How much will one of these set you back?

Gunni- can you fit an M50 head to an m20 then?

[fowler]

why top end ???
you want late mid to top end !!

[oakey]

^ yup thats right. I was just splitting it into 2- top end/low end. Obviously I dont want it to be completely gutless. Please dont assume that I know what Im talking about. lol

I'm just tring to find some info and learn a bit more.

What would you suggest fowler?

[agreen]

you could have a ferrari that does 190mph when ya gonna go that fast never as above mid range power is where its at feela imo its not how fast a car is to some extent it is how fast it gets to say 100 mph like i say thats imo

[oakey]

you could have a ferrari that does 190mph when ya gonna go that fast never as above mid range power is where its at feela imo its not how fast a car is to some extent it is how fast it gets to say 100 mph like i say thats imo

I mean top end/ low end as in top and low ends of the rev range

[fowler]

i only now a couple of bits oakey give me a call or PM your no and i will give you a ring takes to long to type.

[e30_Turbo]

^ yup thats right. I was just splitting it into 2- top end/low end. Obviously I dont want it to be completely gutless. Please dont assume that I know what Im talking about. lol

I'm just tring to find some info and learn a bit more.

What would you suggest fowler?

I'd suggest a Rotrex supercharger, specc'd for 400bhp, you'll be lovin it!

The new units are small, very efficient and require little messing about to get them on, there is some R&D being looked into about these for the M20, so maybe you could benefit from that project in a few weeks.

Check out Rotrex.com for the info and pics.

I'm sure having the power both top and bottom would suit your needs, no?

HTH, Mark.

[fowler]

you have been speaking to ant mark ! very good concept

[agreen]

omg that sound so cool 318is here we come i wish i could have the mony to fit one of those to my 318is wwwwwwwwwwhhhhhhhhhhhheeeeeeeeeeee

[fowler]

you should agreen

[march109]

^ yup thats right. I was just splitting it into 2- top end/low end. Obviously I dont want it to be completely gutless. Please dont assume that I know what Im talking about. lol

I'm just tring to find some info and learn a bit more.

What would you suggest fowler?

I'd suggest a Rotrex supercharger, specc'd for 400bhp, fitted by A-Tech, you'll be lovin it!

The new units are small, very efficient and require little messing about to get them on, there is some R&D being looked into about these for the M20, so maybe you could benefit from that project in a few weeks.

I'm sure having the power both top and bottom would suit your needs, no?

HTH, Mark.

Is this true???????? What more can you tell me about it?????????

How much?? Where?? When??

I want.

[oakey]

[quote="fozzymonster
I'd suggest a Rotrex supercharger, specc'd for 400bhp, fitted by A-Tech, you'll be lovin it!

The new units are small, very efficient and require little messing about to get them on, there is some R&D being looked into about these for the M20, so maybe you could benefit from that project in a few weeks.

I'm sure having the power both top and bottom would suit your needs, no?

HTH, Mark.[/quote]

Sounds nice
That would suit my needs, oh yes

[fowler]

oakey ring me ASAP my number is in my sig i will ring you back if you want

[oakey]

Will call you in 5 mins fowler.

[fowler]

ok dude
nay probs

[1an]

^ yup thats right. I was just splitting it into 2- top end/low end. Obviously I dont want it to be completely gutless. Please dont assume that I know what Im talking about. lol

I'm just tring to find some info and learn a bit more.

What would you suggest fowler?

I'd suggest a Rotrex supercharger, specc'd for 400bhp, fitted by A-Tech, you'll be lovin it!

The new units are small, very efficient and require little messing about to get them on, there is some R&D being looked into about these for the M20, so maybe you could benefit from that project in a few weeks.

I'm sure having the power both top and bottom would suit your needs, no?

HTH, Mark.

i was chatting to Ant about these aswell, only a couple fo bolts, attach a belt and jobs a gooden, i beleive you can add an intercooler/charge cooler for even more bhp

[Ant]

^ not quite that easy but, yeah something like that M8

re the head Q, gotta agree with Gunni, M50 all the way, good enough for BMW and all that...

I may have a passion for the soul of the M20, but the M50 is a close second, I have 3 of them now

[1an]

^ not quite that easy but, yeah something like that M8

re the head Q, gotta agree with Gunni, M50 all the way, good enough for BMW and all that...

I may have a passion for the soul of the M20, but the M50 is a close second, I have 3 of them now

well the way you put it Ant it seemed just like that,

[Eddie25]

http://www.gmcmotorsport.co.uk/

Just found these guys. UK distributors for Rotax Superchargers. Damaging to the wallet. No bolt on kit for the M20. But with some of the things I have seen im quite sure theres members here that could work something out.

[Eddie25]

Sorry Rotrex Superchargers

[DanThe]

M50's FTW

I now have 5 in various forms

[Andyboy]

What would be the ultimate cylinder head for an M20 to get as much power as possible?

It's got four valves per cylinder and it's bolted to every M50 ever made......

[oakey]

What would be the ultimate cylinder head for an M20 to get as much power as possible?

It's got four valves per cylinder and it's bolted to every M50 ever made......

Can you attatch an m50 head to an m20 or am I missing something here?

[DaveD]

if you do a search on this forum you will find that the thought of the rotrex kit is not new...I have a complete fitting diagram for the kit and one is being sold from Germany..

http://www.g-powertech.com/komp.htm

as for 400bhp..none of the kits have been geared for that amount of boost usually a 75bhp gain

[oakey]

3900 euros for the m20 kit eh!? Not at all bad! tempting, tempting.

[DaveD]

3900 euros for the m20 kit eh!? Not at all bad! tempting, tempting.

+ delivery plus VAT

[casper8r]

VAT? What VAT? It's from Europe!

[DaveD]

everything gets charged vat either at the danish rate or the uk rate..depends who imports it

[Andyboy]

What would be the ultimate cylinder head for an M20 to get as much power as possible?

It's got four valves per cylinder and it's bolted to every M50 ever made......

Can you attatch an m50 head to an m20 or am I missing something here?

No. But as the M50 has the same capacity as the M20 and 30% more valve area, it's a no brainer really. If you want the ultimate, you need 24 valves. For big dollars it doesn't make any sense to stick with old 12v stuff.

[antony]

a lil off topic.

Is there any difference between the head on a 320i and a 323i?

There both 731 cast, I know the 323i has a different cam (260/260?), But is there any difference in the valve ports/sizes?

[Andyboy]

Same head.

[StuBeeDoo]

I know the 323i has a different cam (260/260?)

Is it??? I thought 320i/323i L-jet engines were 253/253 and it was only the Motronic engines that had 260/260......
Andyboy?????