RB30DET 240Z Circuit Car

[Scando]

Yep, I think I first raced there in 1991.  About 10 years ago it had an extension to add two more straights and hairpins.  They've done a lot recently with the clubrooms,etc.

[ScottyB]

I work for Purple Pig - we sell your old man hose and fittings.

He mentioned some man hours on his end, lol.

[Hunter]

hey Scotty I may need some custom length -10AN oil cooler hoses, to mount a oil termostat inline with my oil cooler and oil filter relocation kit. Do you make them? or do you just sell the products?

 

i have delt with purple pig somerset in the pasy with mine ventilation products.

 

I work on a mine site where I can make my own hydrolic hoses, would these be suitable? The fitters at work are not sure.

[Scando]

Here's some links to in-car footage from a couple of my runs at the kart track:

 

Run 4

 

Run 5

 

[Hunter]

good quality filming, car sounds awesome

[Scando]

Hi all, bit sad that it's been well over a year since I've had anything interesting to post in this thread.

I've built a house, got married, and now it's finally time to start playing with the Z again 

 

The L28ET is sold, I hope it provides John with as much fun as it has me.

 

The plan is to build an RB26/30 running on E85.  Aiming for about 300-350rwkw for a start with a 7,000 rpm rev limit, high compression and low boost.  This should keep it relaible and give good drivability.  I also want some thing strong enough so that all I need to do is turn the boost up and get a tune if I can afford a drivetrain strong enough to take more power in the future.

 

I've already bought an RB26 that's a bit tired to use the head and inlet setup off.  I'll sell off the rest of the parts I don't need.

I've also bought an R34 RB25 gearbox.

 

This will be a very long term project, I'd say 1 year minimum.  I also plan to replace sections of the chassis rails and extend the roll cage to tie in the front strut towers while the engine is out.

 

So here's the plan:

 

 

-Series 2 RB30 block crack tested, acid dipped, drilled & tapped for RB26 head studs, bored to 86.5mm, annular groves to feed RB26 main bearings, enlarged oil return galaries.

-RB30 crank crack tested, linished, grub screwed & balanced

-Crank collar

-King or ACL RB26 main Bearings

-Standard RB26 harmonic balancer (or an ATI/Ross one if I see one cheap)

-Standard RB26 oil pump – new (or Nitto/Tomei/Jun if I see something cheap)

-Spool Rods

-CP 9:1 or Arias 9.2:1 RB30DET pistons

-Standard RB26 water pump

-Dayco 94407 timing belt with the one high, one low, tensioner setup.

-RB26 head crack tested, hardness tested, acid dipped, surfaced (take enough off to get compression ratio up to around 9.3-9.5:1)

-Standard cams, cam gears, valves, springs, etc with the seats re-done and spring pressure checked.

-Standard RB26 throttle bodies and inlet plenum

-RB26 ARP Head stud kit

-Block the rear oil gallery to the head and use a 1.5mm restrictor in the front gallery

-Extra oil drain in the back of the head and the side of the head plumbed directly to the sump

-Full Genuine Nissan RB26 gasket kit

-R34 splitfire coils so I don’t need separate igniters

-NGK BCPR7EIX-11 plugs

-Holley Blue lift pump (already have)

-Cumulator tank

-Bosch regulator

-Twin 044 pumps or a single 1000hp aeromotive pump

-1200cc injectors or bigger (will probably go Bosch/ID 2000cc)

-Ebay twin feed fuel rail if I go twin 044’s (if not then standard RB26 rail)

-GT3540R with .82 exhaust housing (already have) – may consider 1.06 housing if the .82 come on too hard.

-Whatever T3 flanged externally gated manifold I can find that will work in my engine bay.

-Tial 44mm wastegate or bigger?  Depends on the manifold design I end up with

-4 inch dump into 3 inch straight through pipe. (already have)

-Haltech Sport 2000 ECU (already have)

-Large good quality intercooler (already have)

-Oil cooler (already have)

-Turbosmart Vee Port BOV

-Pod Filter (already have)

-Twin plate clutch (most likely a 2nd hand OS Giken or Nismo, whatever comes up cheap)

-R34 RB25 gearbox

-Modified R33/R34 tailshaft

-Patrol sump to fit the 240Z.  Increased capacity, baffled, etc

-Modified Patrol oil pickup

-Intercooler piping, turbo feeds & returns, etc

 

That should keep me busy and broke for a while!

[garvice]

Awesome, well done. I am building my own sump, so I have a patrol deisel sump and azr200 sump if you're yet to source one.

[sco_aus]

Holy crap man, that's gonna be a monster!  Hope it's done when Jac and I come down next time?.

[peter mc]

nice it will be a fun jigger mate .. the E85 likes comp i run 10.5 on one turbo motor with 20psi in a 2jz with a .92 rear t4 housing and its very nice at the track makes lots of power .. because it runs cooler in the exhaust housing you are better staying smaller in the housing for better responce ,,350kw make one fast zed

[Scando]

Awesome, well done. I am building my own sump, so I have a patrol deisel sump and azr200 sump if you're yet to source one.

 

Thanks Brad, I got a Patrol sump from John who bought my old engine.  200ZR sump would have been a better starting point but since I'm going to hack it anyway it doesn't matter too much.

[Scando]

Holy crap man, that's gonna be a monster!  Hope it's done when Jac and I come down next time?.

 

When's your next trip down?  Like I said, this will be a 1 year project minimum if everything goes well.  Would be good to take you around Baskerville in it next time 

 

I got hold of some 200ZR mounts at a good price.  Haven't tried them yet to see where they will position the engine but I'll let you know how it goes.  If it sits where yours does I'll be very happy 

[Scando]

nice it will be a fun jigger mate .. the E85 likes comp i run 10.5 on one turbo motor with 20psi in a 2jz with a .92 rear t4 housing and its very nice at the track makes lots of power .. because it runs cooler in the exhaust housing you are better staying smaller in the housing for better responce ,,350kw make one fast zed

 

Thanks for the tip on the comp Pete, I wanted to go high comp for the E85 but don't have any experience with it so I wasn't sure how far to go.  I think Arias make a 9.6:1 piston designed for RB30DET's so I might go for them.  I'll wait and see what the head cc's up at and go from there.

 

I bet the 2JZ makes lots of power with 10.5 comp and 20psi!  I'm hoping I can get the power I'm chasing on about 15psi with the high comp.  You're right 350rwkw should be nice    I think any more than that would be hard to use properly in a car as light as a Z on semi slicks.

 

Thanks for the tip on the exhaust housing, the cool exhaust temps is one of the main reasons I want to run it on E85.  I can always stage the boost with the Haltech if it comes on too hard I guess.  I've already got the .82 housing so I'll definitely try that first.

 

Any tips on injectors for E85?  The Bosch Indy Blues seem cheap but I've heard they're not the best?  I've heard good things about the injector Dynamics 2000cc ones, but they're just a modified Bosch 2000cc right?  Are they any better than the standard Bosch 2000cc?

[peter mc]

cp do a piston for 30 26 with 9.5 and it works great standard rb26 cc is 64  and 15 psi will make the power no problems as for the injector the inj dynamics 1000 will make the power you wont with 40 psi Base pressher you will need a large return line and a good reg with two 044 pumps ... the timing numbers are grate with 25 deg at 15 psi boost no problem ,there are some tricks to the combustion chamber i can send some pics to help if you wont

[Scando]

I didn't know CP did a piston to give 9.5 comp.  I had CP's in the L28 and I'm keen to use them again.  I'll have to look into it.

 

Will the 1000cc injectors have much left in them at 350rwkw on E85 or will they be fairly close to 100%?  Do you reckon I should go the twin 044's or the aeromotive pump?  The only thing that worries me with a twin pump system is the potential to lean the engine out if one pump fails.

 

25deg at 15psi sounds nice, was that with the 10.5:1 2JZ?

 

That'd be great if you could send me pics of the combustion chamber tricks.  What does it achieve?

I reckon at this stage I'll just leave the head as is then maybe send you over a head to do if I want more in the future.  I'd still be interested to see the pics if you could send them to me though.

 

Thanks 

[peter mc]

  the camber mods help stop detonation and allow more timing and more power form the same boost, 25 deg in the Rb3026 is achievable with E85 with chamber mods you can have more as for the pumps 1 044 will be OK for low boost eg15psi so two will be nice and the injectors will be at 75 -80 % at 370kw at the wheels you can run the bigger dynamics they are so nice to use nice spray pattern easy to control not like old big injectors

[Scando]

That sounds great if I can get away with a set of 1000cc injectors, it'll save me a fair bit of cash which I can spend elsewhere.  Unless a set of 2000's pop up cheap.

 

I'm definitely interested to find out more about the chamber mods.  I'll send you a PM.

 

[Scando]

Dummy fitted an old RB30 block last night using the 200ZR mounts.  It looks like the mounts are going to work with a bit of modification, thanks Sco_Aus for the tip 

 

As you can see from the pic below they will sit the engine in about the same spot in the engine bay as the L series was.

 

The 240Z mounting points on the cross member are slightly further apart than in a 200ZR so it needs a spacer plate between the mounts and the block to line up nicely.  The plan is to weld on a 5mm spacer plate to the face of each mount and drill some new holes to sit the engine about 5mm further back, 15mm down on the passenger side, and 25mm down on the drivers side (it's currently on more of an angle than it would sit in a Skyline).  This should sit the engine spot on where we want it.  I'll post up some pics of the mounts when we're done modifying.

[sco_aus]

Good to see its coming together, though a little more work is needed.  It seems to sit different with the RB30 block to the RB25 block, but I don't think you have too much work to do to fit it.

[Scando]

I'm not sure it's the difference between the RB30 and RB25 blocks as I'm pretty sure the mounting points are the same.  You're right though, your engine is definitely a lot further back than the standard mounts will sit mine.  We've decided to sit th engine another 35-40mm back now.  Getting some plates made up to weld onto the 200ZR mounts and drill some new holes to re-position it.

[sco_aus]

Good stuff.

[Scando]

Progress has been slow the last couple of months.  Now we're into cricket season it doesn't leave me with much time to work on the Z.

 

We've decided to make some mounts rather than modify the 200ZR mounts.  To get the engine where we want it, it ended up too far from the position the 200ZR mounts put it in and they were going to be quite heavy by the time we welded extra plates onto them.

 

We now have some templates made up for one of my fabricator mates to make the mounts from.  The extra height of the RB30 block makes it a bit more challenging than it would be to fit a normal RB26 or RB25.  The sump will have about 10mm clearance to the cross-member.  I've bought a high mount manifold so the turbo will only have about 30mm clearnace to the bonnet.  I hope this is enough when it pulls up on the passenger side mount under load.  I'll have to get a turbo bag to stop it blistering the paint I reckon.  The cam covers just sit in nicely under the bonnet latching point with about 10mm clearance.  If this hits under load I can always chop it off as the bonnet release is removed anyway.  The engine is sitting around 30-40mm from the firewall which should just allow enough room to run hoses around the back.  There's plenty of clearance from the timing belt cover to the bonnet thanks to the factory bulge in the bonnet.

 

I'll post up some pics once the mounts are made and it's sitting in there properly.

 

I've been keeping an eye on ebay and the skylines australia forum and grabbing parts as the come up cheap.  So far I've acquired a Nismo twin plate clutch, Jun oil pump and collar, ATI 1000HP balancer, twin feed rail with Tomei regulator, exhaust manifold, along with the 25 box and complete RB26 mentioned earlier.

 

Slowly getting there 

[sco_aus]

Good work man.  Shame the 200ZR mounts didnt work out, maybe the RB30 block mounts slightly more forward than the 25. 

[Scando]

Pretty sure the mounting points are in the same spot on a 25 & a 30 because people don't change the mounts when they put a 25/30 in an R33.

 

It's possilbe that the mounts I got sold as 200ZR mount are something different.  They were really cheap!  Anyway, I'm still glad I got them becuase they gave us a great starting point to work with and try different positions.

[Scando]

Progress has still been slow but cricket season ends next week so I'm looking forward to having more time to spend on the Z again.  Got a mate to make up the mounts and did another trial fit with them today.  Looks like the engine is sitting just where we wanted it.  Now for the gearbox mount and tailshaft and then I think we'll start on the roll cage modifications.

[sco_aus]

They look like they were built for these cars.  That is a DECENT feckin turbo too...  Awesome!