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R32 Rb35de Head On A Det Block

swappedturboegg
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swappedturboegg Rookie

swappedturboegg

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I have a Rb25det and the timing belt broke on it and the valves are all bent. I can get a R32 rb25DE head for real cheap localy.

will i loose any power with the DE head? i will need to plug the block because it does not have VCT?

I have heard that its alot more like the rb20* smaller valves lighter valve springs?* so i cant use my 25DET cams?

not really sure what is true or not thanks for any help.

Edited by swappedturboegg
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TurboX Mentor

TurboX

Posted
Posted
I have a Rb25det and the timing belt broke on it and the valves are all bent. I can get a R32 rb25DE head for real cheap localy. <snip>I have heard that its alot more like the rb20* smaller valves lighter valve springs?* so i cant use my 25DET cams?

If the RB25DE head is anything like the RB20DE it will have much smaller chambers so your comp ratio will be very high. - Probably too high!?

I would double check this before anything as obviously it would detonate badly if not massivly retuned to compensate.

RB Racing is currently building a RB20DE with a turbo fitted but have a Autronic to control the potential for detonation because of the high comp.

Cubes Grand Master

Cubes

Posted
Posted
I have a Rb25det and the timing belt broke on it and the valves are all bent. I can get a R32 rb25DE head for real cheap localy.

will i loose any power with the DE head? i will need to plug the block because it does not have VCT?

I have heard that its alot more like the rb20* smaller valves lighter valve springs?* so i cant use my 25DET cams?

not really sure what is true or not thanks for any help.

Who ever said the R32 RB25DE head has smaller valves etc has no idea, they are making an uneducated GUESS.

I believe I saw some one on NICOClub in the RB section making these claims.

The R32 RB25DE head I have has the same sized valves as the R33 RB25DET head, exactly the same.

My combustion chamber cc'd up at 62.2cc's which is also basically the same as the R33 RB25DET head.

The valve springs are lighter as it is a non turbo head. I have GTR springs going in to mine.

The ports are a different design to the R33 Rb25DET/RB26 and they are only slightly smaller but still considerably larger than the Rb20DET ports.

The R32 heads have no issues cracking 400rwhp running stock cams, plenum and inlet manifold.

The Dan Grand Master

The Dan

Posted
Posted
Who ever said the R32 RB25DE head has smaller valves etc has no idea, they are making an uneducated GUESS.

I believe I saw some one on NICOClub in the RB section making these claims.

The R32 RB25DE head I have has the same sized valves as the R33 RB25DET head, exactly the same.

My combustion chamber cc'd up at 62.2cc's which is also basically the same as the R33 RB25DET head.

The valve springs are lighter as it is a non turbo head. I have GTR springs going in to mine.

The ports are a different design to the R33 Rb25DET/RB26 and they are only slightly smaller but still considerably larger than the Rb20DET ports.

The R32 heads have no issues cracking 400rwhp running stock cams, plenum and inlet manifold.

Just wondering if you have any proof of an RB20DET head flowing 480-500hp on stock cams and plenum. Cams max out at around 400hp which will only see you to about 320rwhp.

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