Wax,s 260z 2+2 long term build

[waxhead]

Thanks

Do you know if the deep part of the sump will actually clear the cross member on a z car

other than the to deep

 

Im had considered using an rb30 just because the block is constructed with the oil feed down another web to help you construct the pickup

the rb26 is going to be a bit more of a pain

[Zedman240®]

Yes, but by how much not sure. There's a 260Z 2+2 at a workshop near me that I frequent with a RB25DET with that sump fitted. At the lowest part, the sump is about 2-3 inches from the ground. It really needs to be modified. I should take some more pics for you while its still there..

[waxhead]

If you could that would be awesome

modifying the sump would be a piece of cake , im suprised that more people don't do this

maybe they are like me and don't know about it

[.]

If you could that would be awesome

modifying the sump would be a piece of cake , im suprised that more people don't do this

maybe they are like me and don't know about it

 

Really? I guess it depends on the knowledge and experience of the person doing the modification. There are so many considerations:

 

Correct volume

Ground clearance

Cross member clearance

Pickup positioning

Correct sealing against the block

Warping

 

Get any one of these wrong and it could be a disaster. But then again I am always keen to dive in and give something a go so let us know how it turns out.

 

[waxhead]

Well got the head back from the hot tank today

Came out great

Also picked up my fd mazda seats which I will be fitting soon, i will make new mounts for them at work so I can sit them just how I like, then paint them in so they look factory and will go through compliance easy

[garvice]

I am sure you won't need the help, but just incase.

http://forums.hybridz.org/showthread.php?t=148599

 

I don't use the first 5/6 tilt sections, will probably end up welding up the tilt mechanism for those first few tilts so that it can go straight back to the right position.

[Aaron Neubauer]

Looking good!

 

Dunno about that cascade lollie water though....

[waxhead]

Luckly I opened another account on hybridz 

 

I was looking at what you did and was thinking how good they look in there

Im expecting to end up very close to your setup

 

I did a port job on a friends ski  he came over with the lolly water

LOL I love it

[waxhead]

Enter the rd28 sump.

I picked this up with the pickup for 150 so i thought that was cheap.

Strangely the rd sump uses a gasket with weird bolts to hold it on see pics.

I am happy to use a big rubber sump gasket in case of any warp when I modify it.

I will let the pictures say the rest

[waxhead]

Ok i just picked up an rb25det gearbox from ebay so pretty much got most of the mechanicals ready for this thing now.

Brakes are sorted.

Engine is sorted.

Diff is sorted.

Gearbox now sorted.

I have a panel beater coming over next week to fix the little bits of rust in the body then look at starting to bolt her together.

Ok well maybe not bolt but you get the idea.

My plan is to drive it to the 2011 z-car nats

 

[waxhead]

Well here is the modified sump

all done Pickup is next i guess i shoudl have done that first but i was all excited to get the sump finished

I used a lump of 30mm ply to hold it flat and just screwed it down

 

It holds 4.8 litres before it comes over the windage tray

With the oil cooler that will be alot more and should be good

Now i just have to do the modification for the rb26 oil pickup

 

[waxhead]

Oh and thanks to Zedman for putting me on to the patrol sump

[RB30X]

Do those flange holes seriously line up??

[waxhead]

Yes they do ,the rb26 has two drillings.

One for the alloy sump and one for a normal sump,the ones you can see are for the alloy sump.

 

The rd28 uses a rubber gasket on the sump as well

[NZeder]

The rd28 uses a rubber gasket on the sump as well

that is interesting - all the RB sumps I have seen/removed (3 of them, RB26 when I had one of these, my hybrid RB25/26 from Japan (was front sump) and a spare RB25 block I had) only had Nissan Red or Grey sealer on them no sump gasket at all.

 

I guess as the RD28 is higher CR the internal crank case pressure must have justified using a gasket.

 

Good score on the RD28 sump too by they way as it looks like the 200ZR rear sump is NLA from Nissan so that looks to be a good solution

[waxhead]

Thanks for the heads up

Yeah i was suprised to find a rubber gasket , but also happy I figured that if when I was welding it up there was any flex at all the rubber would look after it.

 

They use bigger bolts on the sump that waste down to the 6mm thread.

Its a different system im not sure if its better or not or just different.

[waxhead]

After speaking to a few people on the web as well as on the phone that have done the rb26 conversion they all seem to be having issues with sump modifcation.

not the depth issue but more the pickup as the rb26 block isnt drilled or cast as far down in the oil gallery.

So the logical and easiest option is to use the rb30 block and make an rb30dett.

The blocks are about $200 for more capacity as well easier to convert.

What was i thinking.

So its rb26dett block up for sale and 26 head on the rb30.

Gee i hope it has enough power 

Lucky I have already secured the rb25det gearbox.

[garvice]

I was wondering why you were going the RB26 route. It always seems like a strange one to me, people seem to think it is the be all and end all RB motor.

Glad to see you came to your senses and are increasing to the RB30.

[waxhead]

Well I was going to go for an rb30dett but then I got offered the rb26 with all manifolds cheap so i went with that

I liked the idea of having the same size engine, But now its rb30dett all the way.

Im not sure how the body is going to handle the pain but i guess thats up to me and the boost gauge

[NZeder]

Well I was going to go for an rb30dett but then I got offered the rb26 with all manifolds cheap so i went with that

I liked the idea of having the same size engine, But now its rb30dett all the way.

Im not sure how the body is going to handle the pain but i guess thats up to me and the boost gauge

I can relate - I had a RB26 and always planned the NA path so wanted to keep in the original 260z cc size. Then I got an RB30 and sold the 26 bottom end. By then I picked up already build RB25/26 engine from Japan for the right price so I moved the RB30 and 26 head on. But if I find my hybrid is not cutting it I can easily get another 30 bottom end

 

So for me I am still within my 260z original cc + with a L24 stroke and L28 bore making just under 2600cc with no turbo on the side for something different to the norm.

[waxhead]

Sounds like a good system you are using

I was thinking about na but then I thought ftw I want to make this thing scream

Yeah what was I thinking about the rb26

Good thing oginal owner wants it back and they have oil coolers and intercoolers etc for me so money saved there

I rung rips in new zealand today and he was saying they have a 550 hp rb30dett they built in 2003 still running around on the original engine with stock pistons

So an easy 450 sounds good to me in the 260z, Im just hoping its enough

[Brabham]

Hi,

  Do the RB25 and 26 heads bolt straight to the 30 block? If not what mods are required to make them fit? RB30/26 is the way to go!

[RB30X]

the rb30 heads bolts/studs are 10mm vs 8mm so the rb26 head has to be drilled out.......apparently.

[waxhead]

The answer is yes

The head bolts on

you have to relocate a tensioner and use a longer belt due to the block height but other then that your good to go

If you use the variable cam timing head you have to do some block modifcation but its not hard

But it means your zcar will do this if you want it to

Which of course would be a very handy thing to be able to do

 

 

[waxhead]

the rb30 heads bolts/studs are 10mm vs 8mm so the rb26 head has to be drilled out.......apparently.

Its the rb26 that uses the bigger studs and it thought I would have to change the rb30 block to fit the bigger studs but I spoke to rips about it he told me that his datsun race car uses the smaller studs on an rb26 head.

If he can do this then im ok with running the smaller studs lol