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Author Topic: Help with a bolt. Please  (Read 6446 times)

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Offline Mikey J

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Help with a bolt. Please
« Reply #30 on: July 25, 2009, 23:56:27 PM »
They're a cracking idea Dave.  God knows how you got them so cheap, my arp's cost an absolute fortune!

Offline Dave

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Help with a bolt. Please
« Reply #31 on: July 26, 2009, 00:41:59 AM »
Yeah the company is doing a big order of 14.9 stuff for someone, so I got lucky  

I sent them 2 bolts to copy, they put one on their bolt spec checker thingy & confirmed it tested as a 10.9.



The ARP studs Mike.

Get 2X MSF64 kits that are about £67 + vat each.

They require a 15mm spacer & can be used with the brace.

Weighed up the pro's / cons & to have these bolts made makes far more sense I think.
Also they are a slightly stronger material but yeah studs create less stress on the threads agreed
« Last Edit: July 26, 2009, 00:45:46 AM by Dave »
Dave

Super 12v

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Help with a bolt. Please
« Reply #32 on: July 26, 2009, 05:08:11 AM »
Dave, yeah the Minker heads you posted are of a very similar spec to mine, minus the sodium filled valves. So I know what they cost to replace and it's not amusing! Yeah never like the CNC machine marks left on the normal TT heads, I did assume the Minker had a standard combustion chamber and you guessed my thoughts with regards to the possible weakness around the sparkplug due to the machining, but I'm not qualified to say really, and I'm not nieve enough to think that less metal means it's weaker either, even if there is a part of be that says big is best! lol

Offline sierra3dr

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Help with a bolt. Please
« Reply #33 on: July 26, 2009, 08:02:18 AM »
Quote from: Dave
8 special bolts is £80 + postage.
Quote from: Dave
I plan to order Monday so be quick.
grrrr...timing is wrong for me,I've disciplined myself not to spend,as someone is waiting payment for blow thru carbs  

Offline Dave

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Help with a bolt. Please
« Reply #34 on: July 26, 2009, 08:56:50 AM »

Yeah Rob it can not exactly help can it.

Have you noticed the later heads are thicker around the spark plugs?

Also if you chop the older head up you can see that the sparkplug area is actually fairly meaty but does not have the surport above to stop it twisting up.

I am no expert either just trying to understand how the brace works myself.

It appears to do just as it's name is & brace the top of the bolts reducing movement which prevents the ends of the head curling up under load & heat.
Because of the leverage of the bar bolted down level with the rocker cover it really reduces any head movement.
This is when they would crack & warp.

Dave

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Help with a bolt. Please
« Reply #35 on: July 27, 2009, 05:38:15 AM »
Hi Dave,

I've not had the opertunity to look at CAT head too much, I know the plug is directed towards the exhaust port I think any re-inforced applied by ford was probably unintentional. Certianly would look at them if I was starting over.

I think you right to think the braces reduces flex in the head. One thought I have had is the possibility to have a widened shank or even a hardened collar which can locate in the head bolt hole at the top of the head, or even perhaps a top hat style washer (with a slight taper) that fit into the heads, as essentially this should reduce flex also, how effective it would be against the brace method is I'm not sure, although alot cheaper but more time spent looking at clearances and various castings for variation.

Rob

Offline Dave

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Help with a bolt. Please
« Reply #36 on: September 05, 2009, 23:21:32 PM »

I now have my custom made bolts  

The company has done a cracking job, really can't fault the work & the communcation from them, top draw!

In the end I also had some STD socket head versions made as it was cheaper then buying them & shipping them from the states as it was the only place I could find them on the shelf.

So now I have:

A set of 14.9 grade head bolts for the Minker to enable a head brace to be fitted to prevent cracking & lift.

Also some 14.9 bolts to further strengthen my 24V bottom end girdle.  

 


Soon I will add the manufacture here somewhere.
You will be able to call them up & ask for these bolts from my drawings they keep in their files.


Dave

Offline Mikey J

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Help with a bolt. Please
« Reply #37 on: September 05, 2009, 23:26:56 PM »
Very nice Dave, defo top drawer items!

 

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