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RB26DETT questions and food for thought


Guest Grenade300

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Guest Grenade300

Just some food for thought: I have a lot of love for the skylines and their power, however I would like to know how difficult it is to get simple things such as an O2 sensor or other parts that will eventually wear out. I am looking at this swap and I love the idea. However, knowledge is power, especially in this case. I would also like to know if there is a distributer of performance parts in the U.S. I also heard that the tranny off the 300ZXTT is the same as the one used on the skyline GT-S, is this true? I have been using the search function and found a lot of answers to most of my questions except these.

 

One last question, how does a sequential turbo system work. The way I understand it there are 2 turbos attached to the single exhaust manifold in parallel, one large and one small. The small one spools up quick to give you good response while the second one spools up and then provides the rest of the boost. Am I correct or is there more to it than that.

 

Thanx for any info, if you have some links please post them.

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First off I have had my RB26 motor for 6 weeks and have yet to get a part for it here in the US. I need simple re build parts (bearings, gasket set, oil pump, water pump etc.) and have yet to get any of them. Thier are several people/ shops that claim they have the stuff, or can get it, but most of them are full of it...

 

I'm waiting on all these parts right now from a guy in New Zeland (GTR Shop), since he's the only one I've been in contact with that can actually say he ordered the stuff for me...

You will have a heck of a time finding anything for these motors here... and thats just for starters. You will need a RB25det trans, the Z32 trans is not a direct swap. Then their is the oil pan, among other things..

 

The turbo manifold is two seperate three bank pieces, that are exactly the same. I could not notice any difference in the manifolds or the turbos on my motor. I belive they both are the same spec, and operate at the same time equally...

I have ditched the whole factory intake system, and the whole exhuast side of the motor in favor of a single custom plenum and twin GTr turbos on a stainless header that a member here is making up for me (SpeedshopThagard.com) and his name is James Thagard (240z Turbo).

 

Their are a couple guys on this board that have completed the RB26 swap into their Z's, so maybe one of them will add something to this for you.

This is just my opinion on your questions...

good luck

 

joel

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Guest Grenade300

Just as I figured, I had already read about the oil pan mods, engine mounts and the GT-S tranny. However, I had seen little on parts here in the U.S. That would be a major thing holding me back from this swap.

 

Thanks for the info.

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Question, about running the RB26 on 91 OCTANE.. will there be a huge difference in performance? and if so, what can i do about it, such as OCTANE boostt of some sort..?

 

any takers.....................

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Question' date=' about running the RB26 on 91 OCTANE.. will there be a huge difference in performance? and if so, what can i do about it, such as OCTANE boostt of some sort..?

 

any takers.....................[/quote']

 

More octane doesn't mean more power. It's just the fuels ability to not detonate. Higher octane will allow more boost though given the same timing and compression.

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The RB26DETT uses non-sequential turbos, but your description of how a sequential system operates is correct.

 

As for parts, the GT-R was offered for sale new in the UK, Australia & New Zealand (and a few other places, like Singapore). The R32-onwards JDM Skylines are also very common in Australia & New Zealand as a 'low volume import'. Nissan Australia has a policy of providing parts for all of their cars that are available in the country (they seem to support the importing a heck of a lot more than Toyota for example). I regularly purchase new parts for my JDM DR30 Skyline, my sister buys bits for her JDM Pulsar GTiR & I have several friends with GT-R's or other R32/33 cars. Parts were certainly hard to get in the early/mid '90's before there was an appreciable number of vehicles in the country, but it's a non-issue now.

 

So to cut a long story short - buy your bits from any Aussie/NZ Nissan performance shop or even direct from a dealership who's happy to ship overseas.

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Guest RB260Z

Grenade,

 

I was wondering about your question about the U.S. 300ZXTT trans fitting on the RB26, because recently I just saw a 300ZXTT here in S. California w/ an RB26 motor.

 

I was trying to ask the owner of the shop if he was using a 300ZXTT trans or a RB25 trans, but I did not get a direct answer, I'll go back to that shop and try to confirm this.

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