New tension bolts on the market???
 

So I was on ebay looking for a set of series 5 tension bolts and I came upon these. Does anyone know anything about these or this seller? They aren't the studs and nuts that are currently available, but rather wider tension bolts alltogether...

http://cgi.ebay.com/ebaymotors/13B-M...em#description

The seller is Pettit Racing in Florida. Very reputable. Give them a call.

Anthony

I wonder...

I've never had a problem with stock tension bolts "failing"...
I don't question if their 10mm bolts are stronger, but are they necessary?

I also question the part about torquing the engine more.
You really should not be going that much higher than stock specs.
29 lb-ft?
I torque them to 30 lb-ft myself.
I've seen when you start to torque them to 35+ lb-ft, the rotating assembly starts to seize...

When engine fails, it's usually due to the block "twisting".
The engine do not usually fail trying to blow itself apart.


-Ted

How's that?

Omfg

Sometimes it's better to stay quiet than remove all doubt.

So what is implied in the ebay add (but not stated) is the S5 and before motors used 7 and 8mm tension bolts and s6 and up used 10MM.

Is this the case?

Gradually increase torque in 5 lb-ft increments over 30.
At 35 lb-ft, you can feel a little bit more drag.
At 40 lb-ft, it took signficant more force to rotate everything by hand.

Or are you talking about something else?


-Ted

In on page 1.


I've always wanted to say that.

The plot thickens!

If you torque them to 50 ft lbs, the rotors and housings will completely collapse themselves into oblivion and all you'll have left is 3 irons. ;)

You just couldn't resist! :lol:

The sun shines on a dog's ass every once and a while doesn't it?

I guess you can't always post a useful reply all the time, eh...


-Ted

Ok the fun begins. :)

'Useful' like 'beauty' is in the eyes of the beholder. :lol:

I would like to know also.:)

Well, I finally got a reply and he mentioned that they are "basically" s6 tension bolts because they are apparently the widest, which made me wonder if the series 6 were wider or better than the ribbed series 5. I can't currently remember if the s5 and s6 looked the same or not.

All 89-95 stock rods were the same, the wider ribbed versions. The 88 and prior were all skinny and non ribbed.

I dont see that you could go more than a couple of mm oversize versus the stock 89+ style, as the holes in the rotorhousings and irons do not line up perfectly all the way through the block and there is not too much slack in them. That is, unless you wanted to mock up the housings and ream them out to roughly matching sizes.