booscivic

Like it says one of my pistons is missing some pieces off the valve reliefs are they still usable?

ninesecrx

Ouch, looks like some Wiseco pistons having issues with the valve reliefs huh? I guess any pistons with detonation has issues in "thin" spots of the piston when the tune if off a bit.

Kinda hard to see, but if there is no crack in the walls and the ring lands have not lifted, you probably can polish down the affected areas and try to re-run them.

booscivic

yeah boost spike like 35psi sure felt fast lmaof

ninesecrx

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by booscivic &raquo;</TD></TR><TR><TD CLASS="quote">yeah boost spike like 35psi sure felt fast lmaof </TD></TR></TABLE>

Haha, it is always fun until the motor gets hurt

pro-motion

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by booscivic &raquo;</TD></TR><TR><TD CLASS="quote">yeah boost spike like 35psi sure felt fast lmaof </TD></TR></TABLE>

Wow, so I guess Wiseco pistons crack at 35psi of boost???

RedEj8

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by pro-motion &raquo;</TD></TR><TR><TD CLASS="quote">

Wow, so I guess Wiseco pistons crack at 35psi of boost???</TD></TR></TABLE>
Any piston can at 35psi on pump gas..Its called detonation

m R g S r

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by RedEj8 &raquo;</TD></TR><TR><TD CLASS="quote">
Any piston can at 35psi on pump gas..Its called detonation</TD></TR></TABLE>

well without the proper tuning, yes.....

OP. . sucks to hear that man! think i sold you an intercooler a while back?

well as long as the cylinder walls didn't get scratched, it's not that bad!!

miller

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by booscivic &raquo;</TD></TR><TR><TD CLASS="quote">Like it says one of my pistons is missing some pieces off the valve reliefs are they still usable?
</TD></TR></TABLE>

i would have to say, replace the pistons.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ninesecrx &raquo;</TD></TR><TR><TD CLASS="quote">Ouch, looks like some Wiseco pistons having issues with the valve reliefs huh? I guess any pistons with detonation has issues in "thin" spots of the piston when the tune if off a bit.

Kinda hard to see, but if there is no crack in the walls and the ring lands have not lifted, you probably can polish down the affected areas and try to re-run them.</TD></TR></TABLE>

lol, if it was a cp it would have split in half.

JDogg

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by miller &raquo;</TD></TR><TR><TD CLASS="quote">

i would have to say, replace the pistons.

lol, if it was a cp it would have split in half.</TD></TR></TABLE>

its a d series... grind it smooth and let em roll

but yeah, what he said!!

Pay2play killa

i've seen them cut like that for bigger valves

PremierS372

I would not reuse them.

Boilermaker1

Well, according to the shop I bought mine from, Wiseco is being lazy and isnt finish deburring the pistons. When I got mine, some of those reliefs were more broken through than others, which is why the shop had to explain this to me... So that thin area where the valve relief meets the wall is supposed to be removed before you install em.
According to what I've been told, buzz the junk off and go at it again.

ninesecrx

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by miller &raquo;</TD></TR><TR><TD CLASS="quote">

i would have to say, replace the pistons.

lol, if it was a cp it would have split in half.</TD></TR></TABLE>

Maybe with you tuning?

BTW, in the top picture is the coating totally flaking off?

miller

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ninesecrx &raquo;</TD></TR><TR><TD CLASS="quote">

Maybe with you tuning?

BTW, in the top picture is the coating totally flaking off?</TD></TR></TABLE>


lmao, ohhh its that a soft spot that i touched?

I dont think im the only person who has ever had this problem with cp pistons. I have had this problem once with a set of 81mm piston and a car i was tuning and i have also fixxed a couple engine that have come into my shop with the same issue. Replaced the pistons with Wiseco's and never had them return. thank you have a nice day

Cyber ITR

is pistons on the top pic 81mm bore ?

tek_civic

you will most likely need to dremel the edges smooth(which means losing more material) THEN deburr and polish. remember detonation LOVES sharp edges and irregularities. But if your able to get them smooth and shaped nicely again i would use em! they appear to be not that bad.

eg:R

look like what happen to my cp piston. piston will be no good. you can just replace the piston that was chip and your good to go.

ham

some people need to learn how to use the boost cut option!

why risk it? just get new pistons.

turbodohcsi

I say grind them down, check for roundess and cracks, take them and get them balanced to each other and you got yourself a new piston with a lighter rotating assembly.

EASY101

use em for ashtrays!

ninesecrx

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by miller &raquo;</TD></TR><TR><TD CLASS="quote">


lmao, ohhh its that a soft spot that i touched?

I dont think im the only person who has ever had this problem with cp pistons. I have had this problem once with a set of 81mm piston and a car i was tuning and i have also fixxed a couple engine that have come into my shop with the same issue. Replaced the pistons with Wiseco's and never had them return. thank you have a nice day
</TD></TR></TABLE>


No soft spot, just speaking some truth. Maybe you got your tune right finally after spending the money to buy a new set of pistons? Thanks, and you have a nice day as well

JDogg

yay, cp arguing again

how about we say this... cp's work very well but have ZERO margin for error. wiseco's can take some abuse before they break

miller

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ninesecrx &raquo;</TD></TR><TR><TD CLASS="quote">No soft spot, just speaking some truth. Maybe you got your tune right finally after spending the money to buy a new set of pistons? Thanks, and you have a nice day as well </TD></TR></TABLE>

Nah my tune wasnt the problem, i know that for a fact. Like i said i am not the only person who has seen this issue.

Can you explain the engines that have come into my shop that i have fixxed for other people? Yet they are still going strong with wiseco's and these guys are home bread tuners who dont know **** other then setting the air fuel right.

Look im not anti cp or anything, i made my first comment as a joke but since you are so mature at handling things i will tell my findings with their product. I have also had some good success with some of their products in other applications. I think it was a mistake and maybe they have fixxed it by now but it is what it and they made a mistake. It happens. I have had other issues with some scion engines i have done where the piston was actually smaller then the stock ones when i recieved them, but it happens. We are humans and we make mistakes, it happens.


ohh yes i will have a nice day, it is beautiful out and im about lite up the bbq for some lunch.

rmcdaniels

It looks like somebody cut those spots out with a cutting wheel.

inspyral

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ninesecrx &raquo;</TD></TR><TR><TD CLASS="quote">Maybe with you tuning?

BTW, in the top picture is the coating totally flaking off?</TD></TR></TABLE>
The black visible portion of the coating is meant to wear off. The part of the coating that matters(the part that's bonded to the metal) isn't visible.