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26 Or 30?

rbs30

By rbs30,
in Engines & Forced Induction

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rbs30 Collaborator

rbs30

Posted
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Hey guys..Just want to see what everyones opinions are.I have a 240z with a rb25/30 gt35r 1.06 exh,external gate,microtech,greddy plenum,injectors etc etc.Its stock internals but rebuilt with race series bearings,linished rods etc.Its making just a tad over 500rwhp...

The car is about to twist its self in half.That much power is unusable in a rwd not to mention dangerous in a car weighing 1020kg.I could put slicks etc on but i dont really race it its just a cool street car so i dont want to.

I have been trying to sell my 32 gtr for a while now and the market is dead.For the prices ive been offered id rather just keep it and put the 240z gear in it.

Question is,do i put the 30 bottom end in (with the 26 head) and all the other gear (turbo,injectors,microtech etc) OR just freshen up the 26 and put the turbo etc on it.I love the torque of the 30 but i love the revs of the 26.Never driven/been in a 26 with decent size turbo/s etc (mine has n1's and they suck!).

does the 4wd block adapter have any problems?how strong is the 30 block in 4wd form.obviously it will have more stress on it than in 2wd.

Opinions?

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https://www.sau.com.au/forums/topic/145550-26-or-30/
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Sydneykid Grand Master

Sydneykid

Posted
Posted
Hey guys..Just want to see what everyones opinions are.I have a 240z with a rb25/30 gt35r 1.06 exh,external gate,microtech,greddy plenum,injectors etc etc.Its stock internals but rebuilt with race series bearings,linished rods etc.Its making just a tad over 500rwhp...

The car is about to twist its self in half.That much power is unusable in a rwd not to mention dangerous in a car weighing 1020kg.I could put slicks etc on but i dont really race it its just a cool street car so i dont want to.

I have been trying to sell my 32 gtr for a while now and the market is dead.For the prices ive been offered id rather just keep it and put the 240z gear in it.

Question is,do i put the 30 bottom end in (with the 26 head) and all the other gear (turbo,injectors,microtech etc) OR just freshen up the 26 and put the turbo etc on it.I love the torque of the 30 but i love the revs of the 26.Never driven/been in a 26 with decent size turbo/s etc (mine has n1's and they suck!).

does the 4wd block adapter have any problems?how strong is the 30 block in 4wd form.obviously it will have more stress on it than in 2wd.

Opinions?

Strengthen up the 240Z, they are notoriously flexible. Particularly the C pillars. Put some decent suspension in it and it will be fine. After all its only 100kgs lighter than my R32GTST which has 600+ rwhp.

:( cheers :woot:

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https://www.sau.com.au/forums/topic/145550-26-or-30/#findComment-2720731
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drf76 Collaborator

drf76

Posted
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rb30 blocks have known to break under the stress the front diff acting on it, the 26 block has extra webbing to support the torque of the front diff but then again there are gtrs out there with the rb30 block that go well with around 100hp more at the same boost than the rb26, ur defintely not wrong about loving the way the 26 revs, many people do lol

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Scooby Veteran

Scooby

Posted
Posted
rb30 blocks have known to break under the stress the front diff acting on it, the 26 block has extra webbing to support the torque of the front diff but then again there are gtrs out there with the rb30 block that go well with around 100hp more at the same boost than the rb26, ur defintely not wrong about loving the way the 26 revs, many people do lol

hi, can you please tell me what rb30 blocks you know of that have broken when used in 4 wd?

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https://www.sau.com.au/forums/topic/145550-26-or-30/#findComment-2721913
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T04GTR Grand Master

T04GTR

Posted
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i rekon you should bolt the turbs on. thats what ive done. t04z 1.2 bar on a origonal r32 gtr engine. its putting out 315 awkw.

ive got a fullly built motor ready o drop in but itsnot showing any signs of dying so its just sitting on the stand lol

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https://www.sau.com.au/forums/topic/145550-26-or-30/#findComment-2722992
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