Hey out there has anyone used postons girdled oil pan where the main caps are preloaded like the rear end covers.I heard that you can use it with main bolts or main studs and what I dont understand is how would preloading the stud(engine with main studs) help in any way.I understand how it would help with main bolts just not studs.Any body got any info on this and any feedback on using it.Thanks
You have to use main studs with the girdled oil pan. There are ten special bolts that pass down through the oil pan and preload the main studs to prevent "main cap walk". Alot of people will tell you that the girdled oil pan does not work and there are others who will tell you that this pan does work. I use this pan and I like it! :TU: It all depends on what kind of motor you are building. Anybody else out there using this pan please post your reply. Hope this helps, Tony Rossini 81 Olds Cutlass / 455 Buick Powered 11.72 @ 112 mph 1.58 60' :3gears:
Keeping this close to the top for more responses..... BTW Bryan, how was work today?:Brow: How much does it pay to put freeze plugs in a 3.8 anyways?:eek2: When I left you looked like this guy--->:rant: More people chime in here if you can, curious about this pan.....
Hey Tony whats up. I was told at the GSCA nats week before last from a guy at the poston booth that said you could use either main studs or mainbolts,I just didnt see the advatage for the stud use when you are only applying force on the stud not the nut on the stud versus a bolt application where you are applying pressure on the head of the bolt pushing down on the main cap itself.Kind of confusing uhh. For Wayne,s question what every it is its to much per John R.
Brian, the idea behind the girdled is to provide additional downforce on the main studs, or bolts. The problem is not that the main caps tend to break, it's that the main webs crack and try to push out of the block. This helps to provide additional load to help hold them in, it also helps reduce cap walk. The pan also adds lots of strngth to the pan rails of the block. One other side benefit is that the alum has one more feature, it helps to dampen out hrmonics in the bottom end, these harmonics may be the thing that is cracking the blocks, iron or steel will not dampen out the harmonics, aluminum will. An intereting note is I have heard of numerous blocks that have broken the main webs with the TA girdle on them, now the block stayed together, but during a teardown, the mains were discovered to be broken, so the girdle did keep things together. Now I have not heard of any reports of this with the girdled oil pan, not saying it has not happened or won't happen, I just have not heard of it. Maybe there is something to the harmonics theory after all. I have run a 535 with a girdled oil pan for quite a few years with no issues. Jim Burek P.A..E ENTERPRISES
I recently purchased the girdled oil pan for my hi-po street motor. Hope its ok to use in a street application, opinions. Will let everyone know how it works out. Allen
