RB28 question

[Skym]

Sick. Any links or videos? That would be the only way I'd go V8 (awd kept)

Found it.

Here's the build thread with 4wd Cima V8 into R32 GTR (mockup) and then into R32 GTS-4 -

http://www.gtr.co.uk/forum/103940-r32-gt-r-difference.html

It shows the custom engine mounts, etc. The rollcage is Gibson R32 GTR Group-A spec. Can see it goes from rollcage through firewall and connects to front strut towers.

[sb119]

it's funny how you ask this question



Labour cost is $6100 as it's on second page which is not shown here.

Now I think about it I rather get a healthy stock rb26 with turbo upgrade and stuff...but then I still love my car....hahahaa

Not trying to be a **** but why would you spend that much building a 2.8l and then use an oem clutch and oil pump?

[leung23c]

As I said in other post, I wasn't the one paying that rebuild. That was the previous owner who did the rebuilt then put 80km on the car untuned then sold the car to me for $15000. Still I think I should have got another car -_- ...

[cortexx]

cometic engine gaskets with a tomei stroker kit ? why no tomei gasket kit ?

[NismoS-tune]

cometic engine gaskets with a tomei stroker kit ? why no tomei gasket kit ?

Cosmetics have been Known to seal well and more than once. My tomei hg after 1 use was nearly finished.
My mechanic's buddy has reused a cometic hg 9 times now and the thing is over 1000hp (v8 of course), still seals.

Then again, people thing skylines are aliens compared to the cars... I was often told eagle rods were garbage. It they've got many cars our there pushing all the way up to 1500HP on them!
Cometic are fine.

[cortexx]

You never ever re-use a head gasket , the nitrile coating is only good for one use . That is engine building 101 - reusing any head gasket is a no-no.

Only time you can reuse it is if the head was removed and the engine notstarted and heatcycled . No wonder your tomei one failed.

[NismoS-tune]

I dunno what to tell you. He owns his own shop and builds dragster and funny cars. Quite successful. Maybe he did that to his car to shop people that they're not 1 time use.

Im guessing we can't reuse head studs on different blocks too?

[Blackcossie]

Pretty common practice to re use MLS headgaskets on many different engines, even RB's. rule of thumb is no visable damage and no coating peeled off. Done it, seen it done. Of course new is preffered but not required.

You never ever re-use a head gasket , the nitrile coating is only good for one use . That is engine building 101 - reusing any head gasket is a no-no.

Only time you can reuse it is if the head was removed and the engine notstarted and heatcycled . No wonder your tomei one failed.

[Skym]

Cosmetics have been Known to seal well and more than once.

If skim block, head they seal fine and can handle up to around 1.7bar with HKS 2530's or similar size turbo's, RB26 on dyno, but the seal is very thin (thinner than stock headgasket) when print tested which worries me.

If for RB26, I would fit Cosworth headgasket or Tomei, HKS, etc (thicker seal).

I dunno what to tell you. He owns his own shop and builds dragster and funny cars. Quite successful. Maybe he did that to his car to shop people that they're not 1 time use.

Im guessing we can't reuse head studs on different blocks too?

Nitro, Methonal engines use a custom headgasket that's made of copper with O rings to suit (can be reused) and is way stronger than stock or metal headgasket.

ACL custom make copper headgaskets -

http://www.aclperformance.com.au/prod_g_copper.htm

Head studs stretch, so can't be reused.

[Blackcossie]

The factory head bolts are torque to yeild ( any thing that uses a final torque in degrees) and should not be reused but I've used a set 3 times before. ARP headstuds can be used many, many times over unless you over torque them. I've used the same arp head studs atleast 10 times.

[NismoS-tune]

Reason I was asking about the headstuds is because I used ARP headstuds (supposedly L19 but who knows, based on who sold em) for 1200kms and since they're like new, I'd like to sell them rather than garbage them with the rest of my minty lump due to a cracked block....

Speaking of which, it looks like the headstuds cracked the block at the oil/coolant jackets. I have heard that the torque spec on the ARP studs are 45lbs more which may have been the cause. Anyone have info? I only had the engine for 1200kms and 300hp.

[Blackcossie]

Hard to say what the final torque value is on factory RB head bolts as the final setting is in degrees but of you use ARP lube with the studs the final torque is only 80 ftlbs. If you use 30 oil it's 120 ftlbs.

Was your engine rebuilt more then once? There's a lot of factors that could cause the deck to crack. A common error is over tightening the stud into the block before the head is installed. On my cosworth engine the deck cracks in the same spot because the deck is thin in that area and Arp studs seem to cause it as well.

[NismoS-tune]

I don't know if it was already cracked or not, the shop that built it used a spare used "N1" block which wasn't an N1 block lol

I'm guessing they overtorqued...

[Black BNR32]

Arps have a length measurement to determine reuse.

I removed the coating on a tomei gasket and sprayed it with permatex copper spray, then reused it.