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12.9 grade studs to crankshaft.

J

Jussi Alanko

Member
Joined
Jun 5, 2020
Location
Finland
Are these Kl-racing studs to crankshaft caps needed to 500hp in b21 engine.

Does these make any difference at engines bottom end, so, is engine stouter with these.

01535.jpg


Those cost about 100?, so they are not expensive.

I'm considering to use these, because i need to disassemble engine, because i'm changing head bolts to head studs (also from kl-racing, 100?).

I will also change piston rings and make ring gaps little smaller, i will grind gaps to 0.60 at first ring and 0.65 to second ring. Now ring gaps are 0.7 and 0.75mm.

I will also put a new 0.9mm thick MLS head gasket to it, my pistons are now 0.10mm shy at the deck surface, so with 0.9mm head gasket my squish/quench is right at the optimal 1mm.

But does these crankshaft main cap studs make any difference when comes to longevity.

https://shop.klracing.se/sv/artiklar/volvo-8-16v-ramalger-129.html
 
Anything that?s better than stock is money well spent, especially when it comes to holding everything together when you?ve upped the power.

Harlard said:
You may encounter oil pump clearances. Go for it.
Click to expand...

I?ve been looking at a set of these as well, in what way does it affect the oil pump?
 
The_Geoffrey said:
Anything that?s better than stock is money well spent, especially when it comes to holding everything together when you?ve upped the power.



I?ve been looking at a set of these as well, in what way does it affect the oil pump?
Click to expand...

Hits it, Oil Pump needs to be clearanced IIRC.
 
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