Best cast pistons

[mecevans]

Unless i can find some forged pistons for cheap im going to go with cast. I have been reading and clevite pistons where supposed to be really good, but i have been having trouble finding them. 400hp is the highest i expect out of this motor for a couple years. Im also dead set on running somewhere around 9-1 compression. Does anyone have anyone have recommendations?

 

[newlife]

Toyota 13103-42070

 

[CyFi6]

I would go with probe forged personally, as i did. They are very reasonably priced and its a little extra assurance. Seen a lot of cracked pistons threads (usually its the users fault, but if they used forged its likely that it wouldn't have gone so fast)

 

[dubsupra209]

npr pistons thats what i have very happy with mine have 10k on them.

 

[mecevans]

I ended up buying the npr set. I was told that i should use the loose end of the ring gap spec for higher boost.

 

[hvyman]

Just make your tune good and cast are fine.

 

[wiseco7mgt]

Pistons are very cheap to buy imo, Probe are the cheaper of the forged and Driftmotion sells them for under $400. Why bother getting anything cheaper?

 

[dubsupra209]

Pistons are very cheap to buy imo, Probe are the cheaper of the forged and Driftmotion sells them for under $400. Why bother getting anything cheaper?

nprs are just fine for a mild stock rebuild not looking for over or close to 500hp....I'm closing in on 300hp once i tune with my neo and i drive my car everyday and put 10k already on my nprs and have no problems...I do agree probe are very fairly priced.

 

[Grimsta]

I'd be surprised if NRPs could handle 300hp, they're inferior to the OEM pistons

 

[dubsupra209]

I'd be surprised if NRPs could handle 300hp, they're inferior to the OEM pistons

im about to find out cause im going to tune my car with my neo soon...but i seen couple threads on here and in 1 of them the guy pushed his all the way to like 400 somthing hp...

 

[mecevans]

My set of NPR's look identical to oem.

 

[Grimsta]

They are a little bit different. We alreay put the set back in the car. I forget why it was we reached that conclusion. I think it may have had to do with the the small oil hole passages in the piston compared to the stock

 

[mecevans]

http://www.youtube.com/watch?v=G0aoOYmF0LM

 

[Grimsta]

You just filmed and uploaded that didnt you, lol

 

[mecevans]

Ya lol

 

[wardog]

I have used both sets of NPR pistons, the polished ones and the ones with the teflon coating. From my personal experience the polished ones have worked better for me. I have had 2 sets of the Teflon coated NPR brake the ring lands quickly. I know use the polished ones and im pushing 430rwhp and 430rwtq with no problem so far after a year of abuse. Please do not tell your machinist to leave the boring and honing on the loose side. I think that only applies to forged pistons, keep your piston to wall clearances on the tight side of OEM specs. I have taken apart some motors and the cross hatchings are worn out on the cylinder walls. Good luck on your build MECEVANS

 

[mecevans]

No it was bore/honed tight. I was told to gap the ring on the loose side so i dont break the ring lands as easily.

 

[wardog]

Just stay in between the specs to be on the safe side.

 

[JStoked]

How good are cp pistons?

 

[slow_yota]

I'd be surprised if NRPs could handle 300hp, they're inferior to the OEM pistons

For one they are NPR and thats what DM sells as its OEM toyota piston...So.... ???