Does anyone have a Torque Plate for a 4age?

[4agtepwr]

Just wondering if anyone has one that I can hire off them to save me making one
Cheers
Willie

[Jebus]

WTF is a torque plate?

[bluemaumau]

WTF is a torque plate?

what he said

[4agtepwr]

It bolts to the head surface of the block and when talked up pretty much puts the block under the same tension as when the head is bolted on.
So this means that when you bore and hone a block with the plate on you can ensure that the bores will stay perfectly round when the head is bolted back on, when you take the plate off the bores can go slightly out of round.
I dont really think you need to do it, if its a fairly stock engine but im just trying to build the best engine i can afford to.

[Dragger_Dan]

Hmmm, never heard of this device before.

But wait..... google has found it

http://www.yother.com/perf.htm


Still don't actually know its purpose tho.

[RedMist]

A head will stretch and contort a block.
You want all your bores to be straight and round when the head is installed.
You can't bore through a head.

As such a torque plate is installed to stress the block to simulate the installed head. Then you bore with the torque plate in place.

Its a minor effect, however very important when attempting to get everything from an engine.

[NA Drifter]

is that possible to bore the engine upside down?... using a "spare head" bolted onto it? so you will get the same effect??

[Dragger_Dan]

is that possible to bore the engine upside down?... using a "spare head" bolted onto it? so you will get the same effect??

Hmmmm, that's a damn interesting question.

[wde_bdy]

I don't think head on would work, would end up leaving a lip at the top of the bore.

Callum

[4agtepwr]

Well it would be possible to bore the block not ideal though and you wouldn't be able to hone it using that sort of setup as the stones need to come out the bottom and top of the bore a little. Looks like I may have to make one.

[4agtepwr]

Nobody?

[ezy10s]

Dont look like it dude- If you gona get one made ill go halves w3ith you though as ill be wanting to use one in the near future

[KinLoud]

Dumb question...
1.
Could you get a 4age block, cut a 5cm to 10cm slice off the top, drill out out the head bolt holes and use that as your torque plate?
Or
2.
Get a head, remove all moving parts and inserts, bore out the combustion chamber area to a bit bigger than the bore required and use the head as your torque plate?

Problems with 1. - the bore would be exactly the same as the bore you want to bore out... is this a problem?
Problems with 2. - once you bored 4 big holes would it be rigid enough?

Ken
Hamilton
021 408 863

[wde_bdy]

Solution 1, simply over bore the torque plate you've made. Question is, would it be less work than making a torque plate out of a chunk of steel? Not much less I would think, and probably less effective.

Calum

[4agtepwr]

Its not all that much work its just one more thing I have to make, Just have to find a piece of steel 50 odd mm thick and other ppl will be able to borrow it after im finnished with it

[4agtepwr]

Well im getting my piece of 50mm plate profile cut at the mo so ill post some pics up when ive finished making it and when the blocks sitting on the boring bar.