Are hd studs needed for a 416 bb kit?

[mad4106]

Im about to put a 416 big bore kit and want to know if hd studs are really necessary i was thinking 11:1 or go down to 10:1 if it is necessary to where i dont need them what yall think?

[Stickman400]

With that compression you should be fine without them as long as you get your jetting right. The only reason they are needed is because the heat can pull the stock ones out. So if you keep the heat away they aren't needed. You could consider adding a Spal fan or an over-sized oil tank to keep the temps down also.

[mad4106]

thanks! another question im buying a new cylinder off of ebay that is already bored to fit a 87mm piston which is the 416. Is it just a bolt on or will it require honing?

[Thumpin440ex]

Still might need a hone, I would DEF do the HD studs for piece of mind.


John

[chronicsmoke]

FWIW my 426 with a 10:1 piston pulled the studs after 2-3 years of having it installed, had a oil spot right under the rocker cover..

Do you need them, no.. but as already established.. it'll save you from replacing your head gasket a few times, lol.

[tri5ron]

Think of it this way...

The only time you really need a helmet,...
...is when you crash.

Do a lot of people ride without helmets ?
Yep !
Would I be one of those people ?
Nope !

Why is that ?

Because a helmet is cheap insurance, that will most likely save me from greater expenses further down the line.

[ansimation]

+1

[slightlybent47]

I used the stock studs on mine 4 years ago and it still doing just fine. And I’m running 12:5 to 1.

[cheater13]

Originally posted by slightlybent47
I used the stock studs on mine 4 years ago and it still doing just fine. And I’m running 12:5 to 1.
Same here. I have 12.5:1 compression with some other stuff done to the motor and i'm running on stock studs.

[Pipeless416]

it seems like it's a hit or miss situation. i'd love to see some tests on the aluminum they use that can check for consistency. mine pulled a while ago with 11:1 compression. when i ended up getting a new cylinder head and a new 416 kit i just ordered the studs for fairly cheap insurance. blowing a head gasket will definitely ruin any trip. i happened to be 16 hours from home at little sahara dunes in oklahoma. :(

^another vote for HD studs!

[mad4106]

Thanks guys one of my friends told me to go to a machine shop and tell them to put steel inserts on the bolts i havent heard of such a thing. I looked on ebay they have hd studs going for 60 bucks. Is this something i could install myself or will i have to go to a shop?

[Stickman400]

You would deff. have to take it to a machine shop unless you have the proper machining equipment and skills. You can also send it to GT Thunder and they will install them for an extra $50.

[tri5ron]

Originally posted by Stickman400
You would deff. have to take it to a machine shop unless you have the proper machining equipment and skills. You can also send it to GT Thunder and they will install them for an extra $50. ^^Agreed^^,
and to expand on that a little bit,...

The "steel inserts" are actually Helicoils that are first drilled and then tapped into the head, by means of CUTTING the threads into the cylinder. Then, once the Helicoils are installed, the stock size studs can be installed into the Helicoils.
It works most of the time, but is not the best way.

The BEST way, is to send the cylinder to GTTHUNDER, and have them install the HD Studs.

This is because the GTT threads are ROLL FORMED into the cylinder, instead of Cutting them into the cylinder.

Roll formed threads, are much stronger than Cut threads.

Also a thing to consider is, if you are not familiar with Helicoils or other inserts,... then you would be better off having and paying a machine shop to do the work,... right ?
well,..
If you are going to pay a machine shop to do the work, of installing inserts,...
why not be spending your cash on doing it the best way, and having it done correctly.

Doing it right the FIRST time,
is ALWAYS cheaper,
than having to do it, (and paying for it), twice.

[Pipeless416]

Originally posted by tri5ron

Doing it right the FIRST time,
is ALWAYS cheaper,
than having to do it, (and paying for it), twice.

I will attest to that :p . To be fair though, my tap just broke on the last hole haha :blah:

[tri5ron]

Originally posted by Pipeless416
I will attest to that :p . To be fair though, my tap just broke on the last hole haha :blah:
http://i111.photobucket.com/albums/n148/tri5ron/Emoticons%20and%20funny%20pics/smiley16.gif http://i111.photobucket.com/albums/n148/tri5ron/Emoticons%20and%20funny%20pics/irony.gif http://i111.photobucket.com/albums/n148/tri5ron/Emoticons%20and%20funny%20pics/smiley2.gif :D :D :D

[slightlybent47]

Nothing wrong with having them done, peace of mind goes a long way.
I don’t do motors because I don’t have all the tools, I would rather pay someone that has done hundreds of builds because they would most likely do a better job then myself.
The guy that built mine said the key is in how you torque the head bolts. He said to do it in small increments and be sure to stagger the pattern as you go. He said to torque to 5 lb then 10 lb then 15 lb and so on till you get within 5 lb of the spec, then go one lb at a time till you reach spec.
Mine has held up, so he may be rite!