[bdekoning]

how many of you guys have or recommend getting the head/block machined before putting a 2mm headgasket on? and are ARP studs a must or what?

 

[SSSUPRA]

Not really any need to machine. The block "should" be straight and from what I was told by toyota techs you just need to block the head with sandpaper. They told me that there is very little extra material on the head so getting it milled isn't an option.

Also, get the studs. You already have it apart might as well do it right the first time.

 

[suprafly79]

I agree with sssupra, I recommend getting the arp head studs
and do things right the first time around. Being cheap and cutting corners will eventually come back to haunt you.

 

[SupraGOM]

make sure to use the right torque specs when installing the studs also...

 

[bdekoning]

so even though its a metal headgasket the 2jz head is perfect enough without milling?

any blown head gaskets on NA-Ts recorded yet?

i guess what im really wondering is if DaveH's car is a fluke or if it really is normal for turbo'ed 2jz-ges to be able to run gobs of boost + nitrous (past the 600 rwhp mark) with the only internal mods being studs and a thick HG..

thanks

 

[lexcoupe]

i got my valves done, i got a 4 angle exhaust valve job, and a 3 angle turbo intake valve job done. It was fairly cheap and my head is like brand new. I just figured that while it was off i might as well do it. I also have the ARP head studs going into it.

To answer your Q yes 2jzge can hold gobs of boost with the stock internals and a thick headgasket and studs. Dave's car is not a fluke.

Kevin

 

[SSSUPRA]

Daves car is NOT a fluke, the head is not always perfect but you don't have much to play with, if it has never been severly overheated, chances are it should be straight. Pay attention to the directions on the studs, (because of the expansion rate of aluminum, torque #'s are less than standard).

As far as it handling power, I have complete faith in mine.

 

[bdekoning]

my concern was the thicker HG having adverse effects on the combustion chamber/quench area and leading to detonation

 

[SSSUPRA]

No, A thicker HG lowers the CR which decreases the chances of detonation when boosted.

 

[motorheaddown]

No, A thicker HG lowers the CR which decreases the chances of detonation when boosted.

SSS... close but no cigar. Sure the lower C/R reduces the chance of detonation, but *proper* piston squish helps, too. Unfortunately, raising the squish above 0.060" (Toyco spec) all but elminates the effect of proper squish. Adding a thicker hg basically blows away the squish effect.

-scott

 

[DaveH]

Just FYI guys, I've re-used my MHG 3 times now, and never surfaced the head or block. Sealed flawlessly everytime.

 

[bdekoning]

what brand/size, and what kind of fasteners?

thanks
Bill

 

[suprafly79]

Just FYI guys, I've re-used my MHG 3 times now, and never surfaced the head or block. Sealed flawlessly everytime.

WOW!! thats great news dave,

 

[motorheaddown]

Just FYI guys, I've re-used my MHG 3 times now, and never surfaced the head or block. Sealed flawlessly everytime.

Dave, not only do you have a quick car, but you're a cheap bastard, too!

 

[DaveH]

LOL!! Yeah, I spent $450 on that damn Toyomoto head gasket, so I'm getting my money;s worth out of it. Bill, I'm also using ARP head studs.

 

[bdekoning]

dave: i believe ive found the perfect motor for the mk3 transplant of mine we were talking about.. ill pm you with how much im paying so you can tell me what you think

 

[kbprice]

I'm with Dave on this one. I just removed my head and reused the Toyomoto head gasket after cleaning it thoroughly. Put the car on the dyno today after reinstalling everything at 18 psi and 471 rwhp no problems.