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Building Turbo engine

For a powerful engine you want Wills rings. If yore going to that much trouble though, Id want a closed deck block too. The Wills ring machining shouldnt be too expensive, but I wouldnt know where to start with the deck closing.
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Agreed, if talking 400 plus hp

I'd start at JMG if interested
George
944t
 
You have issues with Cometic if head/block surface are not totally clean. On the other hand why bother to use MLS style gasket when oem gasket is good enough to all the power you can take from 951 engine. main key is the A/F ratio. Even MLS style gasket will fail if A/F ratio is not correct.
 
ORIGINAL: os951

You have issues with Cometic if head/block surface are not totally clean. On the other hand why bother to use MLS style gasket when oem gasket is good enough to all the power you can take from 951 engine. main key is the A/F ratio. Even MLS style gasket will fail if A/F ratio is not correct.
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I agree, standard gasket design lasted 27 years on my car and the widefire is an incremental improvement to that design. Can't be far wrong....
 
The standard one should be ok or widefire for a mere 300bhp.

I did read an article on rennlist a long time ago - was on the guru racing website that says the widefire is weaker. The widefire has a U shaped section to the metal part which makes it easier to deform, the standard gasket has an overlap and an oval cross section.

I haven't tried distorting one of each to check though!

Tony

 
For a mere 300bhp I'd stick with a standard fresh headgasket, a bigger Turbo and exhaust than your current one and a proper map for 1.2 bar of boost. As long as the boost is not high and the fuelling/timing is good it will last for years.

A headgasket is cheap and you want that to fail first like a safety valve, rather than melting pistons or warping heads £££££
 
This engine will be running knock protection, EGT sensing and wideband AFR. All of which will be fed into the DME for protection and compensation functions. When I mapped the NA engine that was in it before it was quick enough should be wild with a turbo motor! Interesting to see how it hangs with the jap motors...
 
Here some pics of it doing the business with the current 2.5 8V NA engine. Just a shame I didn't get to supercharge it!

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