3.1 m20 stroker HELP

[Griffffo]

HI all I have just decided even though I would love an m52 engine swap I have found there's way to much stuffing around involved with variable timing, auto radiator and the fact that it will cost me $6500 just to get the motor reconditioned.
so I am going to do a m20 stroker so im asking all out there WHAT IS THE BEST STROKER? I have had roomers that a 3.1stroker isn't as good as a 2.8 so is this true? ihave no problems sourcing a 2.7 stroker but I want something that could hold its own against a s50/s52.
also IS THERE A BIGGER STROKER THAN A 3.1 FOR THE M20?
IF YOU HAVE DONE A 3.1 STROKER PLEASE COMMENT!!

[reggid]

Define best ?

The first thing you need to realise is the bigger bottom end isn't about power it's about torque.

The way to make power is in the cylinder head and cam, exhaust and induction tuning.

If you aren't prepared to spend money on making power then you're better off with a budget 2.8L as the bang for your buck is better

[Griffffo]

Define best ?

The first thing you need to realise is the bigger bottom end isn't about power it's about torque.

The way to make power is in the cylinder head and cam, exhaust and induction tuning.

If you aren't prepared to spend money on making power then you're better off with a budget 2.8L as the bang for your buck is better

no problems with spending money I have found a bloke that wil build me a 3.1 stroker for 10k
is the 85mm bore increase that comes with the stroker enough?
when did yours what did you do to the 885 head extractors and intake to handle it?

[Rav335uk]

http://www.e30zone.net/modules.php?name ... c&t=267268

[Griffffo]

http://www.e30zone.net/modules.php?name ... c&t=267268

thanks the boys were talking about a "hemi chamber design" on the alpina could someone please tell me and show me what that looks like?
I am Chrysler mad so I know about hemis but I have never seen it on the m20!

[reggid]

dont do the hemi, chrysler dont do the hemi (i mean a proper hemi chamber) anymore for a reason

[Griffffo]

dont do the hemi, chrysler dont do the hemi (i mean a proper hemi chamber) anymore for a reason

being from Australia I would think youd know what a hemi is capable of!
Chrysler do do hemis still there the gen III twin spark plug 5.7l but you can get a 6.1 &6.4ltr which is lighter than the original 426 and 440 my mate has one in his 70 challenger.
whats wrong with porting the 885 head out to the max? a hemi chamber will be a lot more bigger in volume than a standard port? what sort of valves do you need to uses since its only 12v head?
is it possible to put a twin cam head on a m20b25

[reggid]

dont do the hemi, chrysler dont do the hemi (i mean a proper hemi chamber) anymore for a reason

being from Australia I would think youd know what a hemi is capable of!
Chrysler do do hemis still there the gen III twin spark plug 5.7l but you can get a 6.1 &6.4ltr which is lighter than the original 426 and 440 my mate has one in his 70 challenger.
whats wrong with porting the 885 head out to the max? a hemi chamber will be a lot more bigger in volume than a standard port? what sort of valves do you need to uses since its only 12v head?
is it possible to put a twin cam head on a m20b25

the modern ones arent a true hemi though if you look at the actual combustion chambers and the old ones have nothing in terms of what the pushrod guys have available as aftermarket heads or even a stock LS chamber

they work well for top fuel dragsters but everyone else worked out that they aren't efficient combustion chambers for a 2V per cylinder NA engine.

you want bigger valves that flow efficiently but not a big combustion chamber and a hemi is big combustion chamber with lots of surface area for heat loss and little squish to generate mixture motion. the required piston dome to get high compression starts to impede the flame front so they need more advance than a good chamber which generates negative work .

back to the m20, you want 44/36 valves on a m20 big stroker.

making a hemi has nothing to with the ports and "porting to the max"

[Griffffo]

dont do the hemi, chrysler dont do the hemi (i mean a proper hemi chamber) anymore for a reason

being from Australia I would think youd know what a hemi is capable of!
Chrysler do do hemis still there the gen III twin spark plug 5.7l but you can get a 6.1 &6.4ltr which is lighter than the original 426 and 440 my mate has one in his 70 challenger.
whats wrong with porting the 885 head out to the max? a hemi chamber will be a lot more bigger in volume than a standard port? what sort of valves do you need to uses since its only 12v head?
is it possible to put a twin cam head on a m20b25

the modern ones arent a true hemi though if you look at the actual combustion chambers and the old ones have nothing in terms of what the pushrod guys have available as aftermarket heads or even a stock LS chamber

they work well for top fuel dragsters but everyone else worked out that they aren't efficient combustion chambers for a 2V per cylinder NA engine.

you want bigger valves that flow efficiently but not a big combustion chamber and a hemi is big combustion chamber with lots of surface area for heat loss and little squish to generate mixture motion. the required piston dome to get high compression starts to impede the flame front so they need more advance than a good chamber which generates negative work .

back to the m20, you want 44/36 valves on a m20 big stroker.

making a hemi has nothing to with the ports and "porting to the max"

thanks what are those valves out of?
who did your stroker?
what is the length of con rods from a e36 320i?

[Griffffo]

dont do the hemi, chrysler dont do the hemi (i mean a proper hemi chamber) anymore for a reason

being from Australia I would think youd know what a hemi is capable of!
Chrysler do do hemis still there the gen III twin spark plug 5.7l but you can get a 6.1 &6.4ltr which is lighter than the original 426 and 440 my mate has one in his 70 challenger.
whats wrong with porting the 885 head out to the max? a hemi chamber will be a lot more bigger in volume than a standard port? what sort of valves do you need to uses since its only 12v head?
is it possible to put a twin cam head on a m20b25

the modern ones arent a true hemi though if you look at the actual combustion chambers and the old ones have nothing in terms of what the pushrod guys have available as aftermarket heads or even a stock LS chamber

they work well for top fuel dragsters but everyone else worked out that they aren't efficient combustion chambers for a 2V per cylinder NA engine.

you want bigger valves that flow efficiently but not a big combustion chamber and a hemi is big combustion chamber with lots of surface area for heat loss and little squish to generate mixture motion. the required piston dome to get high compression starts to impede the flame front so they need more advance than a good chamber which generates negative work .

back to the m20, you want 44/36 valves on a m20 big stroker.

making a hemi has nothing to with the ports and "porting to the max"

thanks what are those valves out of?
who did your stroker?
what is the length of con rods from a e36 320i?

[DanThe]

I have found there's way to much stuffing around involved with variable timing, auto radiator and the fact that it will cost me $6500 just to get the motor reconditioned.

no problems with spending money I have found a bloke that wil build me a 3.1 stroker for 10k

This makes no sense,

[reggid]

i got someone to do machine work and assembled most of it myself

44mm valves will probably be customs. you can get 43mm supertec but i dont know any 44mm off the shelf

find a good cylinder head guy they will know a good place to get them but will probably need to massage them to get them to work

[maggspower]

I have found there's way to much stuffing around involved with variable timing, auto radiator and the fact that it will cost me $6500 just to get the motor reconditioned.

no problems with spending money I have found a bloke that wil build me a 3.1 stroker for 10k

This makes no sense,

[_Dan_]

This is the best/highest bhp road engine 3.1 Stroker to date, 291bhp, dialed back to a respectable 280bhp.

http://www.e30zone.net/modules.php?name ... ain+hartge

There he is look, sneaking a post in while i took ages to find Iains Thread.

[Griffffo]

thanks man I will check that out right away.
what I practicaly mean is that the e30 didn't come out with a m52 so I would rather work a m20 whilst staying true to the cars history.
oi reggid where in aus are you? im in Victoria I will get mine done thru MRE

[_Dan_]

thanks man I will check that out right away.
what I practicaly mean is that the e30 didn't come out with a m52 so I would rather work a m20 whilst staying true to the cars history.
oi reggid where in aus are you? im in Victoria I will get mine done thru MRE

This seems to be the case now, keeping the m20 is the better opition.

[reggid]

I'm in Sydney. 10k could be alot or not much depending what's in the scope

[Griffffo]

what do you mean in the scope?

[reggid]

When he builds it for 10k what will he do? And what do you need to give him? Will he supply parts and do all labour and install ?

[Griffffo]

I will supply him with a poorly worked 885 head, a poorly extrude honed intake manifold and BBTB and a 2.5 he will supply the rest and do all the work

[reggid]

poorly worked head and extrude hone intake dont bode well IMO thats where much of the power potential is.

[Griffffo]

hes gonna do massive head work so it doesn't matter. should I go extrude honed intake and BBTB or ITBs?
if so how am I going to run ITBs with an automatic?

[reggid]

one thing for sure is a decently cammed m20 and stock auto probably wont compliment each other... why would you want an auto? if youre looking for power you want something based on the RHD induction kit that comes with ITBs.

[_Dan_]

He doesnt want an auto.. he drove a 318 and now likes manual

[maggspower]

hes gonna do massive head work so it doesn't matter. should I go extrude honed intake and BBTB or ITBs?
if so how am I going to run ITBs with an automatic?

Nope, we're back to auto Dan!

Massive head work FTMFW

[Griffffo]

one thing for sure is a decently cammed m20 and stock auto probably wont compliment each other... why would you want an auto? if youre looking for power you want something based on the RHD induction kit that comes with ITBs.

I loved the manual but I would like to go a tricked up auto with a nice 3-3500 grand stall to take up the cam by the way whats the best cam to go with?
and what is the kit you said comes with the ITBs?

[_Dan_]

I think custard picture is needed, with you and this e30.

[Griffffo]

I think custard picture is needed, with you and this e30.

whats a custard picture?

[maggspower]

I think custard picture is needed, with you and this e30.

whats a custard picture?

Custard test:

Someone comes on to the internet claims to own a gold plated Bugatti Veyron, that has Cheryl Cole's arse print on the bonnet. The internet may not believe this story unless it was photographed with a tin of birds custard in shot

[Griffffo]

I think custard picture is needed, with you and this e30.

whats a custard picture?

Custard test:

Someone comes on to the internet claims to own a gold plated Bugatti Veyron, that has Cheryl Cole's arse print on the bonnet. The internet may not believe this story unless it was photographed with a tin of birds custard in shot

haha im guesing the "tin of birds custard" refers to the person you is to be believed to be talking shit?

[maggspower]

No, its like taking a hostage and photographing them with a newspaper of the day

[_Dan_]

[maggspower]

[Griffffo]

still confused and the pics of the custard made me even more confused then the description "its like taking a hostage and photographing them with a newspaper of the day" makes it even more confusing PLESE GIVE A PROPER EXPLENATION

[Griffffo]

Custard-Test

-noun 1) A request for photographic evidence to support a possibly outrageous claim made by a poster. The subject is required to take a photograph as proof, which must contain a tin/packet of custard (preferably Bird's).
googled it is this what it means?