for a ls/vtec aiming for 450whp

 

Get the hybrid wisecp's, i hear they are the best ones ever. Make a good 50 whp more.

 

both are good. aslong as you arent going over 600whp, shelf wiseco's would be the way i'd go

 

 

I'm partial to CP's personally. But the wind seems to be swaying towards the Wiseco. Either will be fine for you.

 

Both are good pistons, but I like wiseco better.

 

What if u going over 600whp?

 

i will like to know

 

then you would use option 2 in the thread title......

 

I made 550'ish with Wiseco gas ports 10:1 off the shelf pistons 81mm bore...Running cp's this time around aiming for 800 hp

 

I run Wiseco's too but I am tearing my motor down to run CP's before I turn up the boost, are you running the regular wrist pins?

2 very notable tuners have had the shelf Wiseco's fail in the 600hp region......

 

Use the shelf CPs up to 700hp, after 700 use the upgraded wrist pins.

 

so to save time if your set up is capable just upgrade the wrist pins from the get go and use CP pistons....that's what i would do. i like CP's

 

CPs with upgraded wp here.

 

Je

 

The shelf wiseco's have a very thin wrist pin...ive seen them bend @ the 700+whp level. They are fine with the upgraded pins.

 

i think that is so silly. just offer the better ones.

 

A close friend of mine has an LS/VTEC with JE's. Not sure if it's the floating wrist pins but it sounds like a VW desiel when idleing. On a cold start up sounds like it's dry and coming apart.
Anyone know what I'm talking about?

 

i had JE on my LS vtec never sounded like that.

 

Hmmmm, too much piston to wall clearance maybe?

 

Piston Slap

 

Wisecos are very good for the money, come with rings, and are good for your HP goals. I say go for the wisecos.

 

we personally use arias here but we have made 800+ hp on wiscos and cps with upgraded wrist pins with no problems and just under that with out ungraded wrist pins all 3 are brands will work for what you want its more preference

 

all forged pistons will sound loud when cold. that is normal unless the piston to wall clearance is really tight (which is no good for FI)

 

Not exactly. If you want to apply that overbuilding stratagy to everything, he'd have custom strutted pistons, i-beams, custom darton o-ringed sleeves, a full girdle, etc. His plans are 450whp, not 1000whp.

OTS Wisecos are cheaper than CP's, and have a long history of having very nice skirt taper. CP's cost a bit more, but you can see the design is a little better underneith. Custom Wisecos are just as good, just a little more expensive than OTS options. They also never had that issue with a certain melting of the intake-side ringlands that a CERTAIN BRAND piston did, before they "upgraded" the design.


For 450whp, you can't go wrong with either. FWIW my D16's wisecos were set to .0035" (.0038" after the coating smooths out), and its just as quiet as it was before.