Faulty rad cap? - Hoping not a head gasket

Mcv4 said:

I think there’s a higher pressure cap on there for a reason tbh. The engine runs hot so it makes sense to raise the boiling point of the cooling system. All my s1000’s had a 1.2 bar cap. I had to swap my track s1000 to a 1.8 bar from a K series bmw which is exactly what bmw does on the HP4 Race. Rest of the cooling system is the same as a normal K46 road bike s1000rr. Helped a lot with temp and associated spitting coolant out the overflow.
The heads are cast aluminum right? Normally a lot of high heat cycles in a cast alloy head will soften the head. At least in all the sport compact circuit and drag vehicles I’m involved with for work.

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Mcv4 said:

Cool! Shoot me a pic though.
I’ve been the sales manager for Nitto Performance Engineering since the start of the business about 16-17 years ago. Same at Turbosmart for many years prior to that. We do a lot of Nissan RB parts but also work closely with Gas Racing over here with their 2J packages. Do all their custom piston and alloy rod drag stuff. New crankshafts coming for them too. Not as big / fast as 2J’s in the states but still running high 5 second passes with our gear. Many of the well known RB / SR / 4G / Barra cars internationally running our parts.

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Mcv4 said:

That's a good looking Supra! Big tire on it. What sort of HP are you making with it?

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craig bush said:

Thanks bro.

Running that new Precision next gen 6875. Made 1120/795.

You’ve got quite a resume of scc experience. Respect

Anything in your garage with the Duc?

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