King bearings, XP or SI
09-10-2017, 02:29 AM
#1
12 Second Club
Thread Starter
iTrader: (7)
Join Date: Feb 2008
Location: Hayward, CA
Posts: 192
Likes: 0
Received 0 Likes
on
0 Posts
King bearings, XP or SI I was looking at ordering some rod/main King bearings and was looking into the XP series and SI. Is XP mostly for forged cranks? I have a stock crank in my LQ4 that will have around 420-440 rwhp (Heads, cam). Will I be better off with the SI series? This will be a weekend cruiser. Thanks
09-10-2017, 11:10 AM
#2
FormerVendor
iTrader: (1)
Join Date: Nov 2008
Location: Santa Ana, CA. USA
Posts: 2,157
Likes: 0
Received 17 Likes
on
17 Posts
King Bearing Tech Hi 98, good tech question, I use both, the SI for the mains AND the XP for the rods in your case.
You will find BETTER .002" clearance with the AL main bearings + long life.
You will find BETTER .003" clearance with the Tri-metal rod bearings + long life.
I sell both
Lance
You will find BETTER .002" clearance with the AL main bearings + long life.
You will find BETTER .003" clearance with the Tri-metal rod bearings + long life.
I sell both
Lance
09-10-2017, 11:18 AM
#3
I'm interested in how they hold up. I've only ever used clevite and the same with the shop I work at. Only reason I've went with clevite is that I've seen them go for 24 at Le Mans, and not really show much wear.
09-10-2017, 08:34 PM
#5
I personally run king bearings exclusively. I only run hp or xp, typically xp. We run 50+ pounds of boost on our BBC pullin tractors, had issues with flaking with clevites, went to king and the problem went away.
Basically the SI is a oem equivalent replacement as I understand it, the hp/xp are better.
Basically the SI is a oem equivalent replacement as I understand it, the hp/xp are better.