Here's the number of the bolts I use, AN7-14A. The 7 is for 7/16" diameter, -14 is the length, and the A means the shank is undrilled.

All standard aircraft bolts are made of 8740 CM as far as I know.

quote:

Originally posted by nomad:
Here's the number of the bolts I use, AN7-14A. The 7 is for 7/16" diameter, -14 is the length, and the A means the shank is undrilled.

All standard aircraft bolts are made of 8740 CM as far as I know.

A grade 7/16 diameter grade 5 bolt has a minimum tensile strength of 120,000 PSI.

AN7 Bolts have a minimum tensile strength of 125,000 PSI. Slightly better than grade 5 bolts.

A grade 7/16" diameter grade 8 bolt has a minimum tensile strength of 150,000 PSI.

An ARP 8740 converter bolt has a minimum tensile strength of 180,000 PSI.

quote:

I still see no need for any kind of lock washer to be used here. I always use red Loctite on the flex plate/crank bolts which works great too. No washers here are required from my experiences due to the size of the bolts.

Welp I can tell you we put as many laps on our stuff as anyone. 200 in a 3 week period on 2 cars. And we're pretty thorough. We had it happen on bolt throughs. Now we had it happen on our bolt togethers after just 25 runs with NO loctite but split lock washers. Take your chances but we pay thousands in entry's and race for TENS of thousands of dollars. The round we lost in Martin was for $100k. I'll use these washers from now on, no loctite, no nylocks, no metal lock nuts.

Honestly these were found to use on the bolt together converters where the bolt threads into the converter, BUT after the thought, feel they will be superior on a bolt through application also.

Carry On... SL

quote:

Originally posted by 1320racer:
you to0 are a jealous nobody that ain't done shyt nor got shyt worth talking about. save the hate for when you see me next season at Lebanon!

This is for all the so called hate on this forum or other forums. This applies to me, ED, 183N & a good many members on the forum(s).

Take the rhetoric/rederick Forum BS with a grain of salt, it's keyboard free entertainment. Most of what's spewed into the keyboard is never repeated in person if they ever do meet.

Ed, you have spewed plenty of hate on the Forums. Maybe you need to take your own advice "save the hate" for when you see someone at the track. BUT, you seem to have no hate in person from what I here. I've seen some state you are nice in person & I've never heard a bad word otherwise.

I don't hate anyone, we are all here I assume because we are passionate about bracket racing and in all honestly, I don't care what anyone does with their car, their $ and their time. I offer 1st hand experience and advice based on 3 decades of on track proven performance, take it or leave it, makes no difference to me.

That said, I've had numerous posters from here come up to me at the track over the years, introduce themselves, offer their hand, tell me they enjoy my replies, my first hand experience and my no BS approach. Not one has approached me yet, talking shyt to me face If and when that day comes, they will quickly find out that I'm much nice on the forums.

As to 183N, he walked by me back in June, said hello to which I responded and not to long after that comes back here talking shyt about me again.

This message has been edited. Last edited by: 1320racer,

Is Edward really discussing doing physical harm to racers, while tapping on a keyboard from the safe confines of the delusion in his mind, from hundreds of miles away?

Someone tell me I'm imagining this?

you're imagining this just as you imagined for the past 3 years you won that round and didn't kill the cone but no surprise as you are delusional.

Why are you discussing doing physical harm to racers from the comfortable confines of the delusion in your mind, from hundreds of miles away, Edward?

Did they cross the line, by disagreeing with your approach on converter bolts?

This message has been edited. Last edited by: Mike Rietow,

quote:

Originally posted by 1320racer:
That said, I've had numerous posters from here come up to me at the track over the years, introduce themselves, offer their hand, tell me they enjoy my replies, my first hand experience and my no BS approach. Not one has approached me yet, talking shyt to me face as one or two here have. If and when that day comes, they will quickly find out that I'm much nice on the forums.

As to 183N, he walked by me back in June, said hello to which I responded and not to long after that comes back here talking shyt about me again.

Ed,

I don't expect you to get it, but you do the same talking shyt about a good many forum members. Have you approached anyone you talked forum shyt to & start talking shyt in person, it doesn't sound like you do!

This is cheap entertainment, sometimes that's forgotten.

Bryan

No because they don't race!

now stopping wasting bandwidth and get back to converter bolts.

You don't, keyboard tough guy.

quote:

Originally posted by B KING:
You don't, keyboard tough guy.

BG7X77 words of wisdom were in vain, like so many others before him. Sad!

quote:

Originally posted by wonkie67:

quote:

Originally posted by nomad:
Here's the number of the bolts I use, AN7-14A. The 7 is for 7/16" diameter, -14 is the length, and the A means the shank is undrilled.

All standard aircraft bolts are made of 8740 CM as far as I know.

A grade 7/16 diameter grade 5 bolt has a minimum tensile strength of 120,000 PSI.

AN7 Bolts have a minimum tensile strength of 125,000 PSI. Slightly better than grade 5 bolts.

A grade 7/16" diameter grade 8 bolt has a minimum tensile strength of 150,000 PSI.

An ARP 8740 converter bolt has a minimum tensile strength of 180,000 PSI.

Do me a favor. Post the link to that info so I can read it.

quote:

Originally posted by nomad:

quote:

Originally posted by wonkie67:

quote:

Originally posted by nomad:
Here's the number of the bolts I use, AN7-14A. The 7 is for 7/16" diameter, -14 is the length, and the A means the shank is undrilled.

All standard aircraft bolts are made of 8740 CM as far as I know.

A grade 7/16 diameter grade 5 bolt has a minimum tensile strength of 120,000 PSI.

AN7 Bolts have a minimum tensile strength of 125,000 PSI. Slightly better than grade 5 bolts.

A grade 7/16" diameter grade 8 bolt has a minimum tensile strength of 150,000 PSI.

An ARP 8740 converter bolt has a minimum tensile strength of 180,000 PSI.

Do me a favor. Post the link to that info so I can read it.

Pretty easy to confirm those numbers with some quick Googling. Took two searches since I haven’t seen AN bolts on the same chart as SAE.

One thing I did see is that AN bolts are less brittle than SAE, so while tensile strength may be lower than Grade 8, the Grade 8 may break first where the AN bolt would bend.

Easy to find all the specs on McMaster-Carr also.

quote:

Originally posted by DragRaceResults:

quote:

I still see no need for any kind of lock washer to be used here. I always use red Loctite on the flex plate/crank bolts which works great too. No washers here are required from my experiences due to the size of the bolts.

Welp I can tell you we put as many laps on our stuff as anyone. 200 in a 3 week period on 2 cars. And we're pretty thorough. We had it happen on bolt throughs. Now we had it happen on our bolt togethers after just 25 runs with NO loctite but split lock washers. Take your chances but we pay thousands in entry's and race for TENS of thousands of dollars. The round we lost in Martin was for $100k. I'll use these washers from now on, no loctite, no nylocks, no metal lock nuts.

Honestly these were found to use on the bolt together converters where the bolt threads into the converter, BUT after the thought, feel they will be superior on a bolt through application also.

Carry On... SL

Scott

If your converter bolts are coming loose you obviously have an issue. As I stated before, the contact area of the bolt head and or nut alone is too small for your typical power levels that are common today so the load needs to be spread out. If you use a bolt together converter that's aluminum, that is even worse. A good quality bolt and hardened nut (typical ny-lock nuts are very soft) with hardened washers properly torqued works. Adding a lock washer of any type is a band aid solution. Do you use lock washers on rod bolts, main or head studs? If a bolt is loosening up, there is a reason.