Landrew

iTrader: (2)

I stand corrected. That's reasonable custom piston cost if you are say doing a custom stroker or bore.

I'm ARP / Damper / Oil Pump etc invested as well. I'd like to "set it and forget it" for a long time once she is built.

soviet

iTrader: (10)

For everyone claiming these are quiet, quieter, less noise - or anything implying these aren't loud as **** - can you please produce a video of cold start?

Because mine sounds like a tractor ready to plow.

Leafy

iTrader: (1)

Isnt that just normal for a BP?

concealer404

iTrader: (3)

That's because that's what motors making real power sound like.


I will say that my JEs in the 95 were dead ******* quiet. Spook-ily so.

patsmx5

iTrader: (16)

I'll do it in the next few days. You're going to hear a lot of blower wine, nothing I can do about that, but you won't hear piston slap.

ctdrftna

iTrader: (1)

Every piston manufacture has options over there stock line of pistons. FM includes some of these options. Wiesco makes a piston based off of a stock piston and computer modeling. FM takes that and refines it through real world testing and calls it there own. Your getting a custom weisco piston rebranded as FM.

That being said, my off the shelf ones held 460whp just fine

Hot_Wheels

iTrader: (12)

I went back and forth with the same dilemma. I just couldn't justify the extra cost. I also noticed when I was looking Wiesco off the shelf pistons didn't have reliefs in the skirts for oil squirters. I don't believe super tech had notches either. I was also told by one machine shop that I should delete the squirters. I came to the conclusion i wanted to keep mine. After talking with a few people with built motors I decided on JE. I haven't found anything bad about Je's and the skirts are notched for squirters.

Alternative

Does any happen to know the dome size (cc) on the turbo FM Wisecos and intended C/R? If it's listed I missed it.

The radial clearance for oversize valves seems to be taken into account on the FM Pistons where it is VERY tight on the OTS Wisecos using +1mm valves on a BP6D head.

Savington

iTrader: (31)

All OTS Supertech Miata pistons are notched for squirters.

patsmx5

iTrader: (16)

Here you go. Blower wine and exhaust are loud, but I have never heard piston slap. Granted it's not winter right now so can't say for sure but in summer it's silent.

TalkingPie

Unrelated question:

Why does your oil pressure gauge show pressure before engine start?

patsmx5

iTrader: (16)

Because I have oil pressure before engine start.

Because 2qt accusump.

TalkingPie

I didn't realize that was a thing, although I'd thought it would be a good idea to have an electric oil pump to build pressure before engine start. This looks like a simpler way to accomplish the same thing. Very cool.

patsmx5

iTrader: (16)

Yeah it's nice. Simple and effective. It's mainly there to supply the engine with oil in case the oil pump sucks air for any reason. Pre-oiling is also a feature which is nice.