bigport/tvis intake bolt measurements

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bigport/tvis intake bolt measurements

Postby Stealer Of Souls » Wed Feb 14, 2007 1:23 pm

Hi there...

I need to get some suitable bolts to put my TVIS plate back on the car. Can someone give me the measurements.
Diameter
Thread depth/pitch (????)
and length.

cheers
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Postby Barks » Wed Feb 14, 2007 6:09 pm

Bugger.... if you posted this yesterday I could have measure mine.....

I bolted the manifold on at about 11am this morning......

FWIW, if you measure the thickness of the manifold and TVIS plate together and then add on about 25-30mm that should see you right, from memory the thread on the studs only goes 12-15mm

If you're making up your own use an M8x110 grade 5 bolt, cut the the thread on the end back to about 12mm, cut it to length and tap an M8x1.25 thread on the same distance, perhaps even up to 15mm to be safe.

Remember, the thread is M8 x 1.25
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Postby no_8wire » Wed Feb 14, 2007 6:32 pm

or just ask for 60mm M8 bolt at any engineering shop...
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Postby ee904age » Wed Feb 14, 2007 6:46 pm

no_8wire wrote:or just ask for 60mm M8 bolt at any engineering shop...


Agreed.

FWIW Grade 5 doesnt exist in metric bolts. You have a choice of 4.6, 8.8, or 10.9. These numbers in no way relate to imperial grades of 5, 8 and 9.
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Postby Barks » Wed Feb 14, 2007 9:12 pm

That kind throws a spanner in my advice, as 4.8 is too stretchy to use as a manifold stud, and 8.8 is is f$#king had to cut a thread into.....
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Postby Stealer Of Souls » Wed Feb 14, 2007 9:42 pm

no_8wire wrote:or just ask for 60mm M8 bolt at any engineering shop...
That's what I wanted to know!
Cheers.
Just in case I have the option..
M8x1.25
M8x1.5
etc etc
I don't know if that is really a valid question, since I have no idea if you even get different thread pitches on a bolt that size... I'm assuming if you can I want M8x1.25 60mm length.
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Postby ee904age » Thu Feb 15, 2007 7:52 am

1.25 is the standard course thread for M8 so you cant really go wrong.
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Postby Stealer Of Souls » Thu Feb 15, 2007 2:37 pm

Sorted then! Cheers!
:D
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