Tuesday, August 18, 2009

Get more Hemi power from Wiseco! Check them out!

Wiseco is the first in the industry to offer stroker pistons for the new 5.7 and 6.1 Hemi. These pistons have dedicated forgings, ArmorGlide™ skirt coatings, and nitrided rings. Our special skirt design and shape is perfect for street use or drag racing.

Wiseco’s new ArmorGlide™ brings you the ultimate in skirt coating toughness, lubrication, and bond technology working together to minimize friction, maximize horsepower, and provide improved wear resistance. It is a permanent skirt coating and allows the piston to be fitted tighter within the bore than non-coated pistons, bringing you better ring seal and reduced noise from piston rock. Check out our full line of 5.7 and 6.1 Hemi pistons to find what works best for you. Give us a call or contact us online at www.wiseco.com.

K465XS 3.917” bore -8cc dome volume 1.080” compression ht. 9:1 compression
K465X2 3.937” bore -8cc dome volume 1.080” compression ht. 9:1 compression

K468XS 3.917” bore +12cc dome volume 1.080” compression ht. 11:1 compression
K468X2 3.937” bore +12cc dome volume 1.080” compression ht. 11:1 compression

K466XS 3.917” bore +4cc dome volume 1.205” compression ht. 9:1 compression
K466X2 3.937” bore +4cc dome volume 1.205” compression ht. 9:1 compression

K467XS 3.917” bore +21cc dome volume 1.205” compression ht. 11:1 compression
K467X2 3.937” bore +21c dome volume 1.205” compression ht. 11:1 compression


  1. Well, its a great news but its not eactly peaches and apples. The trouble is the piston will not fit the conn rod, unless you use a bushing which on a High performance application a little scetchy. The wrist pin dia is not the same as factory. The rod you need to use is also different then factory and you will need to use a chevy rod bearing. machine the crank down 0.0025". The biggest issue however is that the pistons are oversized. so you need to bore them and take the factory coating off and have it redone again.
    so if you think this is a simple upgrade, no, a complete engine rebuild is in order and using many not HEMI spec parts. I call this a butchering job. It might works at the end but what you gain will be nothing compare to the total cost. a supercharger will give you more power and less money. in this situation I also feel that it will be less risky then this complete rebuild. Wiseco should have done their homework not just get a set of piston that largely the same size.
    when you do a new piston for a well known engine - do it in standard size and use the factory wrist pin dia.
    I'm largely dissapointed in Wiseco's approach to this engine/mod.

    I had a customer who wanted it and I just talked him out of it.

  2. I don't know about that. Any guy needing a forged piston is going to step up to an aftermarket rod. K1 and a few others have those. I've looked at a few other brands of pistons available for the stroker engines and they lack the ring land thickness yours comes with because of your choice of pins. I would agree though that a standard piston and pin would be a decent seller. A Pro Tru version would match the features of the other pistons available and would save a few bucks for the guy that feels he can still get by with a standard rod.

  3. Anonymous #1 is the one that should do HIS homework. Not only have I had a lot of these K1 rods go through my shop, I know a lot of other engine builders who have also. First off, K1 part number DH6243ANLB8-A is an H-beam billet replacement rod for the OEM rod. This rod uses a Chrysler 340 / 360 rod bearing which is Clevite part number CB-481H rather than the special bearing that is made for the factory powdered metal “crack” rod. This is NOT a Chevy bearing and the crankshaft does not have to be machined. While it does come sized for a .927” Chevy wrist pin which normally makes for a less expensive piston, if you want to use the factory size pin, simply honing approximately .013” out of the bushing, a factory size wrist pin can be used. This person also made several other comments that are way off base. First off, to say that using a bushing in a high performance engine is “scetchy” (I think he meant sketchy). Since most all high performance engines use bushed connecting rods, this tells me this person knows very little about high performance engines. Next, they talk about having to machine the bores to fit the pistons. This is all normal high performance engine building 101. Boring the block .030” is primarily done to correct the manufacturing errors that are allowed in an OEM engine but not in a race application. Keep in mind that what comes out of the factory is basically made to go to the grocery store plus a little hot rodding. If you want some serious performance, there are things that need to be changed. The next thing on the list is a complaint about boring the block will remove some sort of coating. These blocks have cast iron bores and are not coated with anything. I suppose if you read enough comic books, you may end up with some of these misunderstandings but if he would check with a real engine shop, he may come away with a much better grip on what a real high performance engine is.

  4. Is it not true that this type of piston is brittle? Well that they are very tuff right up until there not?

  5. Great template! Thanx for sharing it with us
    I like it! Simple and pretty More templates easy to download

  6. hey there Hemi Hot rods, these are 2618 alloy..the tougher stuff used for boost and nitrous. You're thinking of 4032...which is more brittle and used by other piston companies in their cheaper lines.