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Broken Rb25

WHITER33GTS-T

By WHITER33GTS-T,
in Engines & Forced Induction

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WHITER33GTS-T Veteran

WHITER33GTS-T

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I recently did a compression test on my 25 and number 6 was low.

I have pulled the engine down and it has Tomei cams and Tomei forged pistons. The rest of the engine internally was totally stock.

The engine made 399rwkw on 17psi and had redline at 8200 using twin T3/T4 turbos, Greddy plenum, 1000cc injectors, splitfire coils, and Haltech E11v2 blah blah blah.

Everything else is like brand new except for number 6 piston. Even the bore is fine.

I will have to measure up the piston but is there anywhere I can buy just 1 Tomei piston just to fix it up. I am currently getting a 3lt bottom end built so just want to fix the 25 to throw in something later down the track.

Cheers

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Duncan Grand Master

Duncan

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I just did this same rebuild, but with standard pistons, we just replaced the borken one and are putting it back together now. no idea where you will get one tomei one though that will be tricky (and slow)

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drmafia Community Regular

drmafia

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wow blown tommi piston, what turbo are u running ? im interested to know what blew it ? as i might be gowing down ur path very soon. but with my standard internals that is... so i can get busy on some forgies :D

Edited by drmafia
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WHITER33GTS-T Veteran

WHITER33GTS-T

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detonantion was the problem. It has burnt the side of the piston and pinched the ring. When it was compression tested all other cylinders were around 130 number 6 was 60 but went upto 100 with a squirt of oil down the plug hole.

I am having a RB30 bottom end built up so this will be fixed up and sold. Thats if I can find another piston. If not will be scraped.

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WHITER33GTS-T Veteran

WHITER33GTS-T

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wow blown tommi piston, what turbo are u running ? im interested to know what blew it ? as i might be gowing down ur path very soon. but with my standard internals that is... so i can get busy on some forgies :D

Am running twin T3/T4 turbos and 17psi.

My engine was totally stock except for Tomei cams and pistons. Made 300rwkw with a TD06-20G for over 3 years reving to 8200. I went with the twins as i wanted more power. I didnt know what was done to the engine when I bought the car so just kept on adding parts and the power kept on going up.

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