aidandj

iTrader: (5)

<p>Which is why my motor build isn't happening right now. I want to do it right.</p>

18psi

iTrader: (76)

Don't get npr pistons
Don't do it

deezums

iTrader: (3)

Forged pistons won't stand to det much better than OEM, especially if you are pushing harder. They suck for a daily driver, as they have to fit looser and will knock on starts and stuff.

If you aren't at OEM piston melting levels, you don't need forged pistons IMO. Piston melting level is way past drivetrain explodey levels, so why bother?

hi_im_sean

iTrader: (3)

Was just searching google for something, and noticed someone said the 4w came in the mazda speeds?

The guy handed me a bracket with a solenoid and a black box with "boost control" or something to that effect written on it, all eom, not aftermarket stuff. I told him it couldnt belong to this motor as only 04-05 got boost, he said it came with it so...

Do I have a mazdaspeed motor?

hi_im_sean

iTrader: (3)

https://www.miataturbo.net/engine-pe...-engine-62887/

post #5.

*runs to garage to go check*

no the VC isnt red

18psi

iTrader: (76)

You do not.
All NB's have a "boost" solenoid. It doesn't actually control boost, obviously. I think you're talking about the baro/evap/purge sensor/solenoid setup.

18psi

iTrader: (76)

this is not correct.
they CAN take det much more than OEM, and still stay intact. a "det cushion" of sorts for when you run that extra degree of timing or do something mildly stupid when tuning, or run it really hard at the track
the myth is that they are pretty much det-proof, which is false.
Also it all depends on how you build. There's built engines with forged pistons running 60-90k no problem, and there's ones that are so loose they eat the bores within 10k.

There's a lot to this. Sean (IMHO) is just starting to mess with it and I think he's finally realizing there might be more to it than building an engine "in an afternoon"

Not trying to be mean, but that's the truth.

hi_im_sean

iTrader: (3)

ok, that makes sense i guess, they just reused a part they had 10 million of.

not seeing wisecos for 99+ either, or do i have the dumbs? Im getting a little ahead here, but what are the mt.net sanctioned piston choices?

18psi

iTrader: (76)

all 1.8 94-05 pistons will fit
with pump gas and track time, you should be looking at 8.6cr
there's a ton of choices, and there's a ton of opinions
supertech seems to be popular, but again, there's a ton of choices

deezums

iTrader: (3)

Don't supertechs crack unless you hand modify them?

I never plan to use forged pistons, so I don't read into them much. Seems way more trouble than it's worth to me.

https://www.miataturbo.net/engine-pe...pistons-38232/

hi_im_sean

iTrader: (3)

agree

just trying to live up to my thread tittle and be a tight ***


It was just a goal ive done 4 cylinder rebuilds in an afternoon, but those were for customers who werent going to pay for super ---- cleaning and painting, and didnt have to run 10 different places because of lack of preparedness and unforeseen events. But yea, this one is going to definitely get more attention, and Im going to take my time because I can now.

hi_im_sean

iTrader: (3)

I cant say ive ever had forged pistons in any of my cars, but all the bikes have them. Once warm, theyre fine, and remember my car is a street legal track toy, not a daily.

aidandj

iTrader: (5)

<p>8.6cr is for sissys. Why the **** does supertech not make a 10:1. Sad face.</p><p>OEM pistons will die with a little bit of det. Forged will withstand tuning mistakes.</p>

hi_im_sean

iTrader: (3)

Then call me a bitch.

The minor lack of off boost HP so does not out weigh the risk of having 0 HP.

aidandj

iTrader: (5)

<p>Tune it right and it will be fine. Days of 8.6 are numbered, piggybacks are gone and we have good tuning **** now.</p>

hi_im_sean

iTrader: (3)

Do you know what kind of gas CA/AZ/NM gets? (and/or navada?)

Lets just say cobb makes a special tune just for us.

18psi

iTrader: (76)

on pump gas? yeah ok

aidandj

iTrader: (5)

<p></p><p>Maybe not california ****. But i've been reading about compression ratios a lot lately and just what I've been seeing as the trend.</p>

hi_im_sean

iTrader: (3)

maybe an oem who has countless r&d $$$, etc. not this dumbass with a craftsman socket set and a lathe.

aidandj

iTrader: (5)

<p>Do you guys have e85?</p><p>10:1 won't be at its best on pump, but should be livable.</p><p>Are you building this motor soon?</p>