Standard Gasket Limits

[luke gtr]

Hello all.

I used the search function, and still couldn't fund the answers to my question.

If a topic exsists, please point me in Tue right direction.

Now to my question...

What are the boost limits in STANDARD rb26 inlet manifold gaskets?

Looking at going to higher boost soon, but don't know if I should upgrade to steel gaskets.

My engines apart at the moment, so would be Tue ideal time to do it, but don't really want to spend the money if not necessary.

Looking at going to approximately 30psi.

So, what have you run without dramas?

Did everyone just change their gaskets?

Any help would be greatly appreciated.

Thanks in advance, Luke.

[kitto]

30 psi would definitely be on the upper limit of the gaskets for sure. I would dare say at that level you'll blow a gasket.

People running around 20+ PSI seem to have no issues. But im sure someone can state what level they had a gasket fail at.

Just buy a Tomei metal gasket kit, includes plenum to throttles, throttles to head, exhaust manifold gaskets and a head gasket. For $380 US or $495 from hioctane (Tomei head gasket alone from them is $400 odd)

You can get them with different thickness/bore size head gaskets too.

http://www.hioctanedirect.com/index.php?main_page=product_info&cPath=67_75&products_id=756

With metal gaskets, you need really clean and nicely machined flat surfaces to get a correct seal.

[Moodles2]

Go Nitto gaskets, alot cheaper than jap ones and just as good. I think I paid about $170 for my metal inlet manifold, ITBs and exhaust manifold gasket kit from CRD ages ago

[zebra]

Have the head and manifold machined for o-rings?

But I haven't heard of standard gaskets failing

[luke gtr]

thanks for the info guys.

i might give to standard gaskets a go.

then, if/when they go bang, we'll have the answer for anyone else asking.

after all, it'll just be some labour im missing out on...

[blue_vl_t]

Have had 26-27psi with stock intake gaskets, no problems