M20b23 crank In a stroker? Can I?

[nando]

This is the worst stroker thread i've seen in recent memory.

OP, you should listen to people who've built a few of these motors. What you are trying to build is not going to get you what you think it will. The B23 crank is a waste of time.

[2mAn]

m52 crank will yield much better results. peerless on e30tech did this b23 crank a few years back. the engine never really made anymore power than the B25 motor and same with torque from what i remember. there is any value in the effort IMO unless you have a displacement rule for a race class.

my friend currently owns the car that peerless built. made ~135whp without a tune then jumped to around 160whp and about 170ft/lbs with the Miller MAF conversion.

[digger]

my friend currently owns the car that peerless built. made ~135whp without a tune then jumped to around 160whp and about 170ft/lbs with the Miller MAF conversion.

and look what fresh B25 engines make i.e. 150-155 whp on AFM and motronic...so like i said its a small gain over a standard B25 when rebuilt the same level of detail. for not much more effort or cost you could have a B28

[nando]

my friend currently owns the car that peerless built. made ~135whp without a tune then jumped to around 160whp and about 170ft/lbs with the Miller MAF conversion.

exactly what digger is getting at. that's basically what you'd get from a similarily prepped B25. a B28 would have lots more potential for basically the same effort. and honestly a 3 liter doesn't cost all that much more..

[Pdxseth]

Well I do have everything for a 2.7 i maybe I'll just stick with my original plan...... :(


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[Wanganstyle]

[

my friend currently owns the car that peerless built. made ~135whp without a tune then jumped to around 160whp and about 170ft/lbs with the Miller MAF conversion.

M20b25

Fresh stock head stock cam; stock springs and rockers
Bottom end 200k miles +100 hours of racing
91 octane cali pump poopgas
Stock computer and airflow meter
Turner chip
Dyno'ed 154rwhp right after an enduro.

[2mAn]

Im not saying its better, Im simply telling you guys what his setup made. He was planning another build M20 build with a M52 crank ;)

[redlightpete]

All this math is too much for me. I've read the build thread on e30tech over and over again. I've learned a lot today.

It works
885 head
323 cam
M20b25 pistons
135mm rods
M20b23 crank
And a .098" mls head gasket will leave plenty of clearance


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A better plan would be:
885 head
M20b25 pistons
130 mm rods
M20b27 crank
stock head gasket
Deck the block to the desired compression ratio

You can probably get the block decked for about the same cost as the mls head gasket. You'd have a bigger motor and more flexibility with the compression ratio.

[digger]

A better plan would be:
885 head
M20b25 pistons
130 mm rods
M20b27 crank
stock head gasket
Deck the block to the desired compression ratio

You can probably get the block decked for about the same cost as the mls head gasket. You'd have a bigger motor and more flexibility with the compression ratio.

better to use b28 crank dont need to take 2mm off only 0.5mm and more cubes

[Pdxseth]

I'm just going to go with what what people have done it's easy to get a tune for a 2.7i
885 head (with port/valve work)
130mm rods
Seta pistons
Eta crank
And a 274 cam
(I also have headers, port matched intake, p&p'd tb and an m30 afm.


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