3.2L m20 Stroker 11.5:1 CR

[Skafrog]

fair enough.
Well, in that case, post a dyno sheet :)

[bmwdude]

badging is rounded up.

3149cc = 3.1l
3150cc = 3.2l

his "3.2l" is barely a 3.1l

Hate to bust your balls Jordan, but that 9 in 3149 would round the 4 up to a 5, which means that the 1 would round to a 2. It would have to be a 3144 or smaller to round to a 3.1.

Nope, thats not how it works. You only use one number to round; in this case, the 4.

I hope there are no math teachers. or any one else educated for that matter reading this! You do not use only one number to round off.

[KDZROK]

In displacement you do. Look at factory motor CC's vs. actually badging.

[EverWiser]

Okay, children, listen up...You use the digit immediately preceding the place you wish to round to. In this case, you're rounding to the tenths position so you look at the number directly to the right of that space...3.150 becomes 3.15 and it rounds to 3.2. 3.149 becomes 3.14 and it rounds to 3.1. End of lesson. 8)

[Brew]

badging is rounded up.

3149cc = 3.1l
3150cc = 3.2l

his "3.2l" is barely a 3.1l

Hate to bust your balls Jordan, but that 9 in 3149 would round the 4 up to a 5, which means that the 1 would round to a 2. It would have to be a 3144 or smaller to round to a 3.1.

Nope, thats not how it works. You only use one number to round; in this case, the 4.

I hope there are no math teachers. or any one else educated for that matter reading this! You do not use only one number to round off.

http://www.math.com/school/subject1/lessons/S1U1L3EX.html

http://www.math.com/school/subject1/lessons/S1U1L3GL.html

Go to school kids.

[Jarvis]

badging is rounded up.

3149cc = 3.1l
3150cc = 3.2l

his "3.2l" is barely a 3.1l

Hate to bust your balls Jordan, but that 9 in 3149 would round the 4 up to a 5, which means that the 1 would round to a 2. It would have to be a 3144 or smaller to round to a 3.1.

For example, the S54 motor is 3246cc. Everyone's calls it a 3.2L. According to you, it should be considered a 3.3L.
Jordan is still right - XX49cc or lower, round down.
XX50cc or higher, round up.

[turboe30]

By the way, 86mm bore is not too radical, the cylinder width is not really the problem, but the gasket thickness at that cyl width is the main concern. If you run a copper head gasket with an o-ringed block, you could get away with 86mm or maybe more (unlikely) reliably.

This is the first response that is very much accurate to the issues with the 3.2L. The problem is that there is no gasket that supports it.

You CAN run the +1mm gasket with the 86mm bore, but as I found when talking to Ireland Engineering, you will likely burn a gasket as they have seen it happen on the track.

If you ask metric mechanic, they will say 86mm... no problem. Personally I wouldn't do it without a copper gasket.

But that being said... people hear oring and copper then drop the idea. Who cares.. just go with it.

[andrem5]

ya it runs like a bat out of hell.., just had to retard the timing a bit to get rid of the SLIGHT pinging. Those of you at the San Diego Autocross saw it in action. Despite the insults, I'd be happy to let anyone know how I did it and what you could expect as far as results go. Happy stroking.

So is this Todd of Bakersfield? I think I recognize your username from the business card you gave me. I have been away from Qualcomm since January so I have not seen your "new" car. It looks like you built the motor you said you would and that I was skeptical of.

I don't think I will be at the Q Saturday May 21, but be sure to bring your car to the SD AutoX in July so I can see how much you have caught up with me since January! We'd like to see your Dad's Focus too.

Bronzit '88 then *crash* now Lachsilber '89 (stock M20s)

[Calvin Tan]

I thought this was supposed to be like a place where one could appreciate someone else's projects or ideas.., however outragous they may seem.
I Don't know what part of this is so offensive. About the detonation issue, metric mechanic does some trick head work and on this special case piston work they have patented(its called surface turbulance) It allows you to rum much higher compression without or recuding detonation and aslo allows it to run on much less fuel. For instance, I didn't even have to change my injectors, just 9 psi more fuel pressure. It is also infact a legitamate 3.2, no fudging numbers there. The horsepower may not be quite what I claim, but I'd me lying to myself if I said it felt like it was any less. The 284 cam helps also with a few more ponies. Metric Mechanic backs me up on this one as well.

This is how the Metric Mechanic cylinder looks like

[Jordan]

Little late on the reply Calvin, but yeah anyways... those grooves will fill up with carbon quickly.

[King Luis]

ya...grooves in motors is not a good thing...it should be smooth...and stock injectors have been dyno proven to be over they're limit over stock and sometimes at stock horsepower....i've seen 1 picture on this thread of the car (if it even is the car) and my car looks to be in better condition.....also, did you just get all these parts, bolt them up and drive off???what kinda of tuning did you do? and please post a dyno, if it is true, you should dyno it and have some sort of record of this.....i could easily say that i got a supercharged s62 with 600hp at the wheels in my e30...but that would be BS.

[Calvin Tan]

3.2L m20 Stroker 11.5:1 CR

Little late on the reply Calvin, but yeah anyways... those grooves will fill up with carbon quickly.

Ya, sorry little late. Just read the thread, found out this thread is so interesting... 8)

Anyway here is the pistons for 3.2L euro M3

[Calvin Tan]

Re: 3.2L m20 Stroker 11.5:1 CR

I have this pistons because I'm doing a 3.2L engine upgrade for my customer's M50
Sorry for out of thread lil bit. Hope the pics of the pistons will clear things up lil bit... 8)

[SA E30]

Personally I don't think u could run those pistons in an M20 due to them being 86.2mm ... the 3.0lt is 86mm (thats what I'm running and I have no issues) 86.2mm is cutting it so close, it will run but I don't think the motor would last

[Calvin Tan]

3.2L m20 Stroker 11.5:1 CR

Personally I don't think u could run those pistons in an M20 due to them being 86.2mm ... the 3.0lt is 86mm (thats what I'm running and I have no issues) 86.2mm is cutting it so close, it will run but I don't think the motor would last

I agree with you. I'm running 86mm in my M20 too...