I think I am going to use a HKS head gasket for this engine, the shop asked me how much boost I was going to use and recommended a metal one ( I was already going to do a metal one ) Now Does HKS need a 30 RA or less? Lower the smoother of course, what should I do it at for certainty. Also I am going to use arp Head Studs what should those be torqued down to? I need that spec really bad, keep getting different answers. If you have any more suggestions let me know. The engine is going to get done now, they may use my 4000 mile old rods there shot peened so I figure if there good there using them.
Engine is Out Spec: making sure HKS
- Thread starter AllStreet
- Start date
HKS MHG's require a 30 RA or lower spec.
Thickness is determined by how much material is removed from the block and head decks. Simply add both figures in mm to 1.37mm (stock HG thickness compressed) and that is the thickness required to maintain stock compression.
It's really simple for ARP hardware...seriously. Just use the spec sheet that comes with it...I would use moly for lube and use that spec. Anything else ANYONE tells you is BS. We've had this conversation
Thickness is determined by how much material is removed from the block and head decks. Simply add both figures in mm to 1.37mm (stock HG thickness compressed) and that is the thickness required to maintain stock compression.
It's really simple for ARP hardware...seriously. Just use the spec sheet that comes with it...I would use moly for lube and use that spec. Anything else ANYONE tells you is BS. We've had this conversation
Most are the same bro, I would suggest just getting it to 30 or less and using the HKS. Than use the 2.0 mm MHG (just make sure thats the distance) if its more thickness than that that is needed HKS does sell thicker ones but i am not sure as to their sizes.
cometic/titan only need like a 50RA is what i was told...
HKS likes them to be super smooth, 30RA
But either 50 or 30RA shouldnt be hard for a REAL machine shop to get...
HKS likes them to be super smooth, 30RA
But either 50 or 30RA shouldnt be hard for a REAL machine shop to get...
There are other differences between the HKS and Cometic gaskets.
Among other things, I've blown up a Cometic. The HKS has been bulletproof - I shattered 2 pistons, burnt another, and the HKS was still fine.
Among other things, I've blown up a Cometic. The HKS has been bulletproof - I shattered 2 pistons, burnt another, and the HKS was still fine.
Well the surface was machined and a stock h/g is on the motor when i get it I want to take it off and replace it with a MHG and Arp head bolts or studs but I want to make sure I can do it I am calling the company tomorrow to ask what surface RA they use to deck there blocks, I hope I can do the MHG, I put a Mhg on once didn't know you have to remove the rivets and also I started to bolts down the head gasket and the threads from the head bolt got caught and made the hg go up and damage it.
thanks fro the input guys!
thanks fro the input guys!