Tomisto

Hello

I need to replace my cyl head gasket.
My car is mildly tuned with Lindsey racing chips and upgraded WG. + boost enhancer.
Runs on apprx 1.0 bar boost.

Do I need to upgrade the Cyl head gasket or will the original Porsche gasket do the job?

I am not planning to increase HP. Please advise.

Tor Michael

931guru

With your current setup, you blew your stock headgasket.

What makes you believe that you will not do the same with a new headgasket (and your current setup)?

fejjj

With your current setup you should be fine with a stock gasket.

If the one that blew was original then it was almost 30 years old.

I would recommend adding the Lindsey Racing steam vent kit.

V2Rocket

Original gasket is fine and proven for a lot more than what you are throwing at it
Yours failed likely due to age.
Good time to get the head rebuilt with new valve guides and seals and a freshly-cut surface.

Tomisto

I guess it failed due to age.
Kind of doubt that it has been changed since new. I had the car for 7 years now and the previous owner did not do anything with it...

Good news the stock gasket can hold more than my setup. Will just buy one from OPC then.

Thanks guys😊

Tomisto

Ohh, will do a rebuild as well on the head while I am at it.
Does anyone know where to buy reasonably priced new lifters? OPC price was rediculous....😱

V2Rocket

The price for new lifters is ridiculous no matter the source
However, there is NO NEED WHATSOEVER to replace the lifters if you are re-using the same camshaft and the original lifters do not show actual damage. They are NOT "wear parts".

951Dreams

I'm on the fence on gaskets. If I was doing anything to the heads at all, I'd likely go wide fire and the steam vent kit. Hell, I did the steam vent kit on my NA, and Mike Lindsey had to talk me out of doing wide fire on it as well! I'm kinda a fan of overkill. I'm finding I'm doubly so on the 951. I'd rather spend more now and do it once than have to do anything again any time soon.

But that being said, from what I've seen, pinging and over-boost aside, it's​ the gasket area on the far side of #4 that is the most common failure point. Talking to Mike Lindsey it seems there is a void in the head up there that gets a air pocket in these and bleeding can't get it out. So they drill a hole there, and let the coolant flow back to the expansion tank. He said they did lots of test, and can see the hot spot in non-vented heads. And the vented heads don't have it. The theory is that the different temps in the head from that air pocket leads the the gasket failure around #4. Laws of thermodynamics, metal expanding at different rates and all that. It also effects the NA, but due to the extra heat it is more prone to cause issues on the turbo.

For the 60 bucks, it was worth it to me to do all I can to make the HG last as long as possible on the NA. So I'm the crazy guy who steam vented my NA head. If nothing else, it makes me feel better! LOL

I'll never do a 951 head without it. Can't hurt anything, and if it helps... Well all the better!

My .02 cents.

V2Rocket

Steam vent is a good idea while you're in there.
The WF gasket was sort of a "bandaid fix" but some found that it was no more "secure" than the standard one.

951Dreams

Why I'm kinda on the fence. Some people say snake oil, and some swear by it. I don't know what to think...