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Gtr Block

Guest acxacx

By Guest acxacx,
in Engines & Forced Induction

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Mik Experienced

Mik

Posted
Posted
  DiRTgarage said:
A cryo'd std block will do fine...much cheaper too

Nismo don't seem to think so. Back in the day before 24U blocks, NISMO couldn't get 05U blocks to last at more than 450PS for endurance use.

Also, when 24U blocks were available, there was only about 10,000JPY between an 05U and a 24U.

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Swiper the Fox Grand Master

Swiper the Fox

Posted
Posted (edited)
  Mik said:
Nismo don't seem to think so. Back in the day before 24U blocks, NISMO couldn't get 05U blocks to last at more than 450PS for endurance use.

Also, when 24U blocks were available, there was only about 10,000JPY between an 05U and a 24U.

Did Nismo cryo and de-burr their blocks??

Mark Jacobsen, Theo Wollett, Croydon's and Myself seem to have had great service from 05U blocks.

Extensive abuse has proven my theory in "real world"....i think you should go back to your books boy!

Edited by DiRTgarage
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Mik Experienced

Mik

Posted
Posted
  DiRTgarage said:
Did Nismo cryo and de-burr their blocks??

Mark Jacobsen, Theo Wollett, Croydon's and Myself seem to have had great service from 05U blocks.

Real world testing has proven my theory in real world....i think you should go back to your books boy!

NISMO did 'prepare' their blocks, not too sure what that meant, but I'd imagine it would be heat tempering them rather than freezing them. I'm not convinced that cryo treating a block would stop it cracking.

As for deburing...not sure whether they did or not, but my block was deburred from factory. But in any case, Rb26 blocks usually crack between 3 and 4 on the water jacket...good luck deburring it in there.

Notice I said endurance use...not a 10-15 second squirt. A top fuel engine pulls 6000bhp, but lets see what happens if you try to run it for more than 20 seconds.

And NISMO did real world testing...and I bet they have built (and broken) more RB26's over the past 17 years than any other organisation on earth.

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Swiper the Fox Grand Master

Swiper the Fox

Posted
Posted (edited)

Who "endurance races" their Skyline anyway?? The track days you would be lucky to get 5 "hot" laps in...and the State champs guy's would be lucky to see a dozen. Like i said this is the real world we are discussing not something you have read.

Suppose we better wait and see what sort of monster acxacx is building before making judgement on what he really "needs"....I see Buster has a suitable block up for grabs for good $$...

Edited by DiRTgarage
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