Personal opinion: Wiseco/K1 combo is overpriced and overrated. All they (or any other company for that matter) had to do was make a simple forged piston, but they made a $1000 piston/rod combo that you can't use one without the other. :violent1:
I wanted the long (seven-inch) rods, and the package price isn't significantly different that the price I assume is part and parcel of the "rebuild package" if you order the narrower rings, which are included on the Wiseco pistons. I wasn't able to figure out the pricing on the rebuild package deal, so, I may well be wrong on that. But, the long rod has less side-loading of the piston, and I thought that to be a worthwhile benefit.
Alternative: https://www.flatlanderracing.com/index.html (Rebuild kits section in sidebar>High performance rebuild kit>Chrysler) $970 for pretty much EVERYTHING except for a cam, and the pistons are custom forged ones with thin metric rings being a $130 option.
Couple of other things; why are 220,000psi studs so much more special than 200k ones? Cuz ARP has the 200k ones in stock, and most likely it'd be more economical than having a custom set made.
The off-the-shelf ARP studs for the head hold-down at the time I bought these, were not 200,000psi, they were 180,000psi. That must have changed between then and now. The 220,000psi set we got was part of a "group buy" at a reduced price, because we bought several sets (ten? I don't recall.) They also had a set available that were 260.000psi, but were considerably more money, so we went with the 220,000psi set. But, that is still ten percent more clamping force, (than the 200,000 currently-available "off-the-shelf", 200,000psi ARP studs,) and that is a significant amount, I think.
And... a 9.1 compression would be pretty close to the last thing I'd want if I were building a boosted slant, and apparently others feel the same because if I remember correctly, Tom runs a CUSTOM piston with his K1 rods that puts him somewhere around low 8s, maybe even high 7s. Pretty sure I read that over on the turbo forums.
Another runs a .100 copper gasket to lower compression. Are you sure Ryan really runs a 9:1?
No. but I will attempt to find out; it's a good question.
For the street, I agree RE: the 9:1 compression, but this engine in my car will never be asked to run on 93 octane, nor on the street; I will likely have a 50/50 mixture of pump gas (Premium) and the unleaded race-version I think they call "C-112." I have a properly-sized air-to-air intercooler and run a Snowperformance "Boost Cooler" coming on at 8psi of boost, for more charge cooling, so, I am hoping for no detonation problems. The block is O-ringed with copper wire. A locked plate delivers spark from an MSD Blaster Coil and a 6-AL II digital module. I utilize spark with 18 degrees total, with no curve, and no vacuum advance.
