Rant: my gripe with ARP.

[Farbin Kaiber]

I'm pretty sure you don't wear a 13.5 either. I wear a 17 and wore a 13 back in seventh grade, so I know there are not half sizes after 12.5, so...

[browntown]

Can you elaborate on this shoulder and how it locates the rocker shafts?

So this is mainly based off talking to folks on the phone who build m30's and not some josh brown knows all about these engines. I don't think this applies to m20's. The shoulder on the M30 oem head bolt protrudes into the rocker shaft bore. By shoulder, see my snazzy arrow here


Just to make sure I went into the garage. 1st pic is a m20, see how there is no intrustion from the head bolt into the rocker shaft hole. 2nd is a dirty m30, see how the two bores (head bolt and rocker shaft) intersect? That's where the shoulder presumably exerts some side load or at least locating point for the shaft. This is my understanding, not fact, and has little to do with conversation this thread was originally meant to discuss.

[MR 325]

So this is mainly based off talking to folks on the phone who build m30's and not some josh brown knows all about these engines. I don't think this applies to m20's. The shoulder on the oem head bolt protrudes into the rocker shaft bore. By shoulder, see my snazzy arrow here

Just to make sure I went into the garage. 1st pic is a m20, see how there is no intrustion from the head bolt into the rocker shaft hole. 2nd is a dirty m30, see how the two bores (head bolt and rocker shaft) intersect? That's where the shoulder presumably exerts some side load or at least locating point for the shaft. This is my understanding, not fact, and has little to do with conversation this thread was originally meant to discuss.

Wow, I never knew that about the M30 cylinder heads.

Now my question is this, what about this design makes you think you shouldn't run ARP?

(I know the thread wasn't about this but at least we're discussing something constructive!)

[slammin.e28]

Shoulder keeps the shaft from moving as the M30 has four shafts, not two like the M20. M20 looks like it is held together by the half moons on the front/back of the head. (IMO)

[Mr. Burns]

I'm pretty sure you don't wear a 13.5 either. I wear a 17 and wore a 13 back in seventh grade, so I know there are not half sizes after 12.5, so...

completely unrelated to the thread, however...

[browntown]

I think anyone that wears a big shoe knows that nike sizes are made for the chinese factory worker who makes them. A 13.5 nike is a 12 to everyone else.

[Farbin Kaiber]

Either that is a new development, or its just a Nike size chart. They run smaller anyway.


Edit: I can post a chart to defend my statements too.

[slammin.e28]

ARP would make awesome motherfuckin' shoes.

[Roysneon]

You would have to torque them to your feet in the correct pattern to keep them from deforming your footprint.

[kingston]

HELP! I am just about done rebuilding my shoes, but I can't find the torque specs for the pinky toes!

[Exodus_2pt0]

Paid $200 for 10 arp headbolts on my GLI, $225 sounds fair

[FLG]

Heh...arp head bolts for my dodge (440 cid) are only 90$ and studs are only 150ish...and thats a total of 34 bolts.

[MR 325]

Heh...arp head bolts for my dodge (440 cid) are only 90$ and studs are only 150ish...and thats a total of 34 bolts.

ARP's market majority is definitely American cars. ;)

[CrusherCurtis]

I'm pretty sure you don't wear a 13.5 either. I wear a 17 and wore a 13 back in seventh grade, so I know there are not half sizes after 12.5, so...

True I used to work at footlocker back in high school, but Jesus man you were at 17? Pics?

[smooth]

So this is mainly based off talking to folks on the phone who build m30's and not some josh brown knows all about these engines. I don't think this applies to m20's. The shoulder on the M30 oem head bolt protrudes into the rocker shaft bore. By shoulder, see my snazzy arrow here

Does the nut that fastens to the bolt have the shoulder?