Main cap support with the bedplate photo

Joesixpack

Joesixpack

Pull'n it.
Joined
Apr 4, 2008
Messages
4,118
Simply just flip it over, I had some hardend washers that fit under nice with a slight gap that gives a some pre-load......cost almost nothing.


P1030450.jpg
[/IMG]
 
would you mind posting a more broader pic? its kinda hard to make out what you did.
Thanks
Joe
 
I'll get a better photo tomorow, at that stage of the game. Won't be long now.
 
Try and help keep the crank from blowing out the bottom, best solution no....stronger than stock.....yes.
 
Do you happen to know the HP level the caps walk or the pan rails separate?
 
Don't have anything on that, other than a couple of posts I read on one of these forums thought they seen some evidence of cap walk at around 800 - 900.

Then I read back a while Scheids were only using main studs, so that says a lot.

On my trashed block its pretty shiny under the caps, not how I remembered it when I put it together....all the bolts were good and tight, except for the 4 bolts surounding the throw that cheese grated the piston out the side. They were stretched a bit.

Frankly I don't know if I've even heard of a failure of the bottom end yet......Browns broke a crank, or bent it, don't know all the details but thats next I suppose.

I'd like to see counter weights directly on #2 and #5 instead of transfer through.
 
Joesixpack said:
Don't have anything on that, other than a couple of posts I read on one of these forums thought they seen some evidence of cap walk at around 800 - 900.

Then I read back a while Scheids were only using main studs, so that says a lot.

On my trashed block its pretty shiny under the caps, not how I remembered it when I put it together....all the bolts were good and tight, except for the 4 bolts surounding the throw that cheese grated the piston out the side. They were stretched a bit.

Frankly I don't know if I've even heard of a failure of the bottom end yet......Browns broke a crank, or bent it, don't know all the details but thats next I suppose.

I'd like to see counter weights directly on #2 and #5 instead of transfer through.
Click to expand...


I don't like the metal to metal contact, of the bolt and the plate. It might work just fine, but if it moves just a little, maybe even just a little vibration transferred to the bolt head your gonna be putting metal shavings in the pan.
 
zstroken said:
I don't like the metal to metal contact, of the bolt and the plate. It might work just fine, but if it moves just a little, maybe even just a little vibration transferred to the bolt head your gonna be putting metal shavings in the pan.
Click to expand...

Ditto.
 
think about that for a second...there is tons of metal to metal contact in the engine at rpms or speeds way higher than a slight vibration caused from a bolt head on smooth metal...
 
getblown5.9 said:
think about that for a second...there is tons of metal to metal contact in the engine at rpms or speeds way higher than a slight vibration caused from a bolt head on smooth metal...
Click to expand...


Yes and most of those are hardened surfaces, that are made for the wear, and those surfaces are also having oil shoved in them. While this will probably have an oil bath on it, I am having a hard time visualizing the oil penetrating to the center of the bolt head.

I don't think that plate has a hardened wear surface.
 
zstroken said:
I don't like the metal to metal contact, of the bolt and the plate. It might work just fine, but if it moves just a little, maybe even just a little vibration transferred to the bolt head your gonna be putting metal shavings in the pan.
Click to expand...

Yeah I thought about that too, but there already is lots of steel to steel in the engine, rockers, lifters, cam. And these are active parts, I don't see this as very active and its oil bathed as well.
Maybe a bit of steel polish during operation I imagine, metal shavings I doubt it.
 
Joesixpack said:
Yeah I thought about that too, but there already is lots of steel to steel in the engine, rockers, lifters, cam. And these are active parts, I don't see this as very active and its oil bathed as well.
Maybe a bit of steel polish during operation I imagine, metal shavings I doubt it.
Click to expand...


Yea I shouldn't have said metal shavings, and if your just running the thing as a competition engine you probably won't get hours on it before it is torn down again. The only bad thing is as soon as it starts to move around and you get a little clearance in there, you have pretty much lost the advantage.

It is a good idea, maybe just needs a little more refinement. I have a friend that I am trying to get to make me a bottom plate that I either weld spacers too, or just make the spacers integral and run it as a girdle that ties into the caps.
 
I like the idea, but I dont like the idea. The plate is not hard at all I could see vibration causing friction between the bolt head and the plate and causing a gap. I know with my girdle even the oil pick-up tube left slight swirl marks in the plate I would be scared...
Brandon
 
You must log in or register to reply here.
Back
Top