Hey everyone,

In the near future, I plan to have high compression pistons installed into my car to take full of the Jun 3 cams i already have in there. I have basically narrowed the choices down to CTR pistons or IB spec Wiseco pistons (11.8cr). In choosing between the two, the reliability and durability of my motor is my greatest concern.

I have read that forged pistons are typically stronger and withstand heat better, while CTR pistons lasts longer (although I have heard of melting issues with the CTR pistons). I have seen SGT recommend these pistons before, and his opinion is worth a lot in my mind.

My car is my daily driver and I plan to auto-x it. Eventually, it will be my track only car. Which pistons would you choose given my circumstances and why? Thanks

 

Reliablity = CTR

Power = Wiseco

Cost effectiveness = CTR.

 

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

Power = Wiseco

Cost effectiveness = CTR.</TD></TR></TABLE>

That about sums it up. Forged pistons do have some advantages over CTR pistons thought. They are stronger, and most are lighter. However, you'll experience piston slap, and they cost more than CTR's.

 

piston slap isnt a big deal, just need to have the motor warm up and itll go away. the ctr pistons are the heaviest honda pistons you can buy, thats a disadvantage to them as well.

 

forged pistons also tend to burn a little more oil then cast do.
i would go forged: lighter... why ruin the whole point of having the lighter ITR components in that block. You also get the option of choosing what compresion you want. CTR's are nice but aftermarket is the way to go.
just use oem Honda rings and you'll be good.
Breaking them in is the worst wait ever!!!!!!!!

 

thanks for the input guys!

does anyone know approximately how much power difference there is resulting from the different weight of the pistons?

 

breaking in is a worst wait, but some would argue over that matter as far as some think seals break in better if you just slam that mother after a few miles... i am not sure, but i don't want to start a debate as many other thread discuss this

 

IMO forged it better,. not all brands give you slap like that , it all depends on if the piston calls for larger piston to wall clearances due to expanding becuase of the silicone content .i can tell you now JE's slap like a bitch . i dont think Weisco's are bad or Cp's, they usually ask for tighter piston to wall clearances

 

CTRs are gonna put you over 11.8CR

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by gumtape_deathmatch &raquo;</TD></TR><TR><TD CLASS="quote">CTRs are gonna put you over 11.8CR</TD></TR></TABLE>
PERFECT!

 

the biggest difference between the weight is throttle response and how fast the tach will climb

CTR - heavier - slower
FORGED - lighter - faster

 

i am not too worried about the piston slap of forged pistons; i am just worried about their longevity (i want the motor to last at least 60,000 more miles)

but the weight of CTR pistons is really a cause for concern as well.

thanks for everyone's opinion...hmm, what to do

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Type-Rare#1248 &raquo;</TD></TR><TR><TD CLASS="quote">i am not too worried about the piston slap of forged pistons; i am just worried about their longevity (i want the motor to last at least 60,000 more miles)

but the weight of CTR pistons is really a cause for concern as well.

thanks for everyone's opinion...hmm, what to do </TD></TR></TABLE>

Longevity of the piston isn't the problem - it's the longevity of the cylinder walls that you should be concerned about. I would go with a non-forged piston for engine longevity. That slap that you're not worried about is wearing on the cylinder walls and decreasing the longevity that you are worried about.

 

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

Longevity of the piston isn't the problem - it's the longevity of the cylinder walls that you should be concerned about. I would go with a non-forged piston for engine longevity. That slap that you're not worried about is wearing on the cylinder walls and decreasing the longevity that you are worried about. </TD></TR></TABLE>

THANKS for letting me know! That is new knowledge to me

 

anymore input guys?

 

*ahem*

wiseco forged pistons and wrist pins 12.1:1
knife-edge crank
full head pnp (head + tb)
valve job
balanced bottom end

do it do it




in other news i think you should buy new lower control arms so you can sell me your old ones :D :D :D

 

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

Longevity of the piston isn't the problem - it's the longevity of the cylinder walls that you should be concerned about. I would go with a non-forged piston for engine longevity. That slap that you're not worried about is wearing on the cylinder walls and decreasing the longevity that you are worried about. </TD></TR></TABLE>

but.. with ctr piston compression will be an extra .4? if you'r to spend few thousands on rebuild, get something out of it.. or just keep it stock. unless they have high compression cast pistons.

 

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

in other news i think you should buy new lower control arms so you can sell me your old ones :D :D :D</TD></TR></TABLE>

sure...how bout 1000 USD for each of my lower control arms

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Type-Rare#1248 &raquo;</TD></TR><TR><TD CLASS="quote">i am not too worried about the piston slap of forged pistons; i am just worried about their longevity (i want the motor to last at least 60,000 more miles)

but the weight of CTR pistons is really a cause for concern as well.

thanks for everyone's opinion...hmm, what to do </TD></TR></TABLE>

not worried about piston slap?? but your wondering about piston durability? is it just me or does your statement just make no sense? do you even have a clue what you are asking?

 

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

not worried about piston slap?? but your wondering about piston durability? is it just me or does your statement just make no sense? do you even have a clue what you are asking? </TD></TR></TABLE>

chill dude...JeffS just explained it above and I stand corrected. Please keep your comments constructive to what I am asking.

 

damn thats a good price, SOLD!!!

when can i pick up? or you deliver?

 

up for anyone who wants to help a honda-tech brotha out, and offer him some good advice

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by unKnown &raquo;</TD></TR><TR><TD CLASS="quote">damn thats a good price, SOLD!!!

when can i pick up? or you deliver?</TD></TR></TABLE>

i'll deliver

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Type-Rare#1248 &raquo;</TD></TR><TR><TD CLASS="quote">i am not too worried about the piston slap of forged pistons; i am just worried about their longevity (i want the motor to last at least 60,000 more miles)

but the weight of CTR pistons is really a cause for concern as well.

thanks for everyone's opinion...hmm, what to do </TD></TR></TABLE>

Either way you go you really cant lose.
I usually suggest CTR because:

you get lots of compression(close to 13:1)
fits and runs like stock with no unusual noises
cost is less

the extra weight doesnt matter that much, sure youll see a little less power
than you would if u had lighter pistons but there wont be any negative effects

 

Ross Pistons are Great as well

PM me if you need some i can get them custom made to your liking

 

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

Either way you go you really cant lose.
I usually suggest CTR because:

you get lots of compression(close to 13:1)
fits and runs like stock with no unusual noises
cost is less

the extra weight doesnt matter that much, sure youll see a little less power
than you would if u had lighter pistons but there wont be any negative effects

</TD></TR></TABLE>

Excuse me for asking this but I have searched and never got a definitive answer as to what CR I would get installing 81,25mm CTR pistons in an otherwise stock B18C, is it really close to 13:1?