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Rods Rods Rods!

JustinP

By JustinP,
in Engines & Forced Induction

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JustinP Mentor

JustinP

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I have a quick question I hope someone can help me with. I know that the R34 RB25DET NEO uses the exact same rods as the RB26DETT, but I just need to confirm that RB25DET rods to suit a non NEO R33 would also fit in an R34 RB25DET NEO. I am almost certain that they are the same size and are interchangeable between all of them, but I just need to make absolutely sure!

Reason being is that I am looking at purchasing this:

http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&item=270472689565&ssPageName=ADME:X:RTQ:MOTORS:1123

I understand that the pistons are completely different on the 25 NEO, but the guy can order the custom pistons to suit from CP. However I just want to make sure that the Eagle rods will no cause me any issues considering they are for a normal R33 RB25DET.

Also, any opinions on Eagle rods?

Thank you!!!! :action-smiley-069:

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JustinP Mentor

JustinP

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300rwkw, for now at least. Going with the forged internals is perhaps overkill for the moment, but I would rather do it properly now just in case I want more in the future. And the motor will be out anyway, so why not!

And I may have a buyer for my old rods, so I thought I may as well get the Eagle forges ones too. Each rod is about 150 grams lighter than the stock ones, surely that has to improve things somewhat.

Whats is your power goal mate?

And dam thats a good price.

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R31Nismoid Grand Master

R31Nismoid

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For 350-400rwkw you'd just use GTR rods. Given 100's of built motors using them without a problem, for $200 - cant go wrong really.

If you wanna pay $1200 then by all means do it - but 400rwkw is a well proven "no issue" factor. Infact many have run 450rwkw through GTR rods without a problem for years. Key is using good rod bolts of course and less than 8500rpm it would seem.

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JustinP Mentor

JustinP

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I already have GTR rods as far as I understand! The engine is an R34 RB25DET Neo - I have been told that the Neo uses GTR rods? Am I incorrect in this thinking?

The main reason I am looking at getting the Eagle rods with the CP pistons is that the extra cost is minimal. And I was going to get some ARP rod bolts in any case for the rebuild. These are included in the price, so I think I am getting the Eagle rods for almost nothing.

In addition to that I have a friend with an R33 GTR. He is currently rebuilding it, and needs new standard rods. I could sell him my rods for a few bucks as I understand the Neo rod is the same as a GTR RB26DETT rod.

My initial question though is, are RB25DET rods interchangeable with RB25DET Neo rods, keeping in mind the pistons are different and are not interchangeable.

Anyway thanks for all the help so far :cheers:

For 350-400rwkw you'd just use GTR rods. Given 100's of built motors using them without a problem, for $200 - cant go wrong really.

If you wanna pay $1200 then by all means do it - but 400rwkw is a well proven "no issue" factor. Infact many have run 450rwkw through GTR rods without a problem for years. Key is using good rod bolts of course and less than 8500rpm it would seem.

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r33cruiser Grand Master

r33cruiser

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300rwkw, for now at least. Going with the forged internals is perhaps overkill for the moment, but I would rather do it properly now just in case I want more in the future. And the motor will be out anyway, so why not!

And I may have a buyer for my old rods, so I thought I may as well get the Eagle forges ones too. Each rod is about 150 grams lighter than the stock ones, surely that has to improve things somewhat.

BAAAAD IDEA

Thats like saying I will buy a 50 footer incase it floods again :rolleyes:

Wait UNTIL your motor goes pop THEN forge it if you have fully researched the costs and make an INFORMED decision to forge it :domokun:

Why waste your moneys..

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JustinP Mentor

JustinP

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The motor did go pop!! Well the head gasket went pop at least.

The bores / pistons look OK visually, but as the motor is out of the car I think i will rebuild it anyway. It's got 100,000k's on it and I want it to last a while, particularly with the increase in power. The additional cost for the forged bits is minimal in the scheme of things, and as I said I am effectively getting the rods for free.

BAAAAD IDEA

Thats like saying I will buy a 50 footer incase it floods again :rolleyes:

Wait UNTIL your motor goes pop THEN forge it if you have fully researched the costs and make an INFORMED decision to forge it :domokun:

Why waste your moneys..

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JustinP Mentor

JustinP

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Thank you to everyone for all the info :cheers:

Sounds like yes R33 rods can be used in an R34 (which has different pistons) :)

So I should be all good. In any case I have noticed the seller also has an RB26 kit for the same price, I will just get that to be sure, with the custom Neo pistons instead.

Read his question, read my answer

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