RB30-ZED

It looks like Simon is using the Ford 65mm throttle body and like the Holden Commodore which comes in 60 and 65mm clockwise and anti-clockwise, is a dime a dozen, thankfully. Its mainly up to the idle control and throttle position switch you wish to run. Holden use a idle stepper motor and Ford use a duty cycle system. Steven

There are small European cars now with steering racks with a built in electric power steering pumps, nice and compact,just a steering shaft and a couple of wires to the rack. Steven

Have a look in my home page link, in the old zed folder is a L28 manifold. I welded a Holden Commodore flange on and ran a 60mm V6 throttle body, very cheap and easy. Steven

You do have to make up new mounts, cut and shut a sump, move the top spout in the radiator, make up throttle linkage, exhaust, gear box mount, engine management ect ect, but isnt that the fun of doing the job. if this type of work is not for you , you would be better off going and buying some thing you like than half doing the job. Steven

Yes it is necessary, as ive seen insert removed that didn't have a liquid to transfer the heat and they had burnt the paint off them, which is certainly not good for the hydraulic oil. I don't use oil as it can look like a leak. Use coolant which will do a better job and will not cause corrosion. Steven

Hi Bob, I did have this system running my last motor which was a L28 running a roots blower. I ran the Kalmaker 2 bar programme which is now part of the new system they sell. the advebriations they use are all in the hand books and make a lot of sense once you get use to them. some of the features of the 2 and 3 bar programme are water injection control by a 3D map, 3D boost control so you can run more or less boost at different rpms, and inlet temp correction for ignition maps. It also has the ability to run two sets of fuel and ignition maps that can be switched between or biased between each other while driving. I cant see the Kalmaker having any problem with your transient boost problem, as its rpm VS. manifold pressure, if boost is changing so will the fuel map. If you email Alan at Kalmaker he would be happy answer any questions for you. Steven

I think you guys may find this site interesting, if not for the fact that this is a very good system, but also because you can use a old corvette ecu as a donor. http://www.kalmaker.com.au/page7.html It uses a Delco ECU and all its sensors and loom. Any thing a factory Delco ECU can do can be changed to suit, ive used it for a couple of year and its been fantastic. Steven

Here is every thing you need to know. http://trinity.frontierisp.net.au/~rowan/twincam.htm Steven

Hi Mathew, my engine is a N/A and yes the compression ratio will drop to around 8.3:1. But the RB25 pistons have the same diameter and has a bigger dome top, the only difference is in the pin height which is less than 1mm higher in the RB25. I used the RB25 pistons and decked the block 0.8mm, this gave me 10.5:1. See it here! http://www.240z.org/photopost/showgallery.php?cat=500&user=1957&thumb=1 Also http:/au.photos.yahoo.com/arkij60 Steven

Just highlight the ratio in the box and delete, then type in what ever you like. Steven

Yes

Yes i have the three litre block and RB25 head with the over the top manifold, under the bonnet of my 240, you can see some pics of it at, http://zdriver.com/rides/detailride.php?cat=1&relIdx=14&vehId=1118&Vote=Yes or my home page. Steven

Me too! or is that three ? http://zdriver.com/rides/detailride.php?cat=1&relIdx=14&vehId=1118&Vote=Yes Good luck , have fun Steven

There is some info here . http://zdriver.com/rides/detailride.php?cat=1&relIdx=14&vehId=1118&Vote=Yes But in a nut shell its a Australian 240 73, stripped back to bare metal and sprayed in Diablo Red. The suspension is kings springs 300lbs front 325lbs rear, koni top adj short inserts, VT commodore 296mm front brakes, XR Falcon 300mm rear discs skyline callipers with twin master cylinders, balance bar, no booster. R180 viscous LSD. Engine RB30DE variable valve timing, 10.5:1 comp Delco /Kalmaker engine management. and last but not least my 16x7 Panasports have just arrived fitted with 215/55x16. Steven

Hi Richard Well id say they you sound very happy with the settings you have now. The only case for running more caster is that it will give you more negative camber on the out side wheel in turns, which could let you reduce the static negative camber of 3 degrees to perhaps improve grip for braking. Steven

Hi there Miles, what ever you do , don't gut the original valve as this will join the front and rear brake circuits giving you just the one. The original valve can be replaced with one that only joins in to the rear circuit and the front lines can then be joined together. The reason for the front line running through the valve is so if the front circuit fails, the proportioning valve will stop operating giving you full use of the rear brakes. Steven

Sounds great, but tell me is 20-15 better than 20-20 dont know how it works. Id love to get mine done but im a chicken when it comes to having some one play with my eyes, wouldnt mind if i could keep them closed durring the op. Steven

Hi Simon, yes a bigger plenum can give you more power, but only if it wasn't correct to start with. We all seem to think the factory get it wrong , but the truth is the RB25DET plenum is not to bad at all, it may look like the RB20 but there are some differences. The RB26 style manifold would make it an easier job and help keep some heat from the inlet plumbing. The Standard manifold will fit under the bonnet, ive got about 15mm clearance at the closest point. There are photos of the manifold in my home page link . Good luck with the project. Steven

Yes mate, the little house symbol above the text Steven

Have a look at my home page, i just added two RB25DET circuit diagrames in the engine folder. Also have a look at www.skylinesdownunder.com there forum has alot of infomation, some very good but some, well you know. Steven

The only RB engines sold in Australia were the RB30E, RB30ET and the RB26DETT ( Nissan Aust. did sell the R32GTR here). But we do have lots of RB motors here.The RB20 as far as I know was never a V.V.T. engine, but the RB25DE and DET in the later model R33 skyline were the first RB with the system. All RB twin cams have six coils but the RB**E and ET had a optical Dizzy (Distributor). I've been told the RB20 ECU can be rewritten but not the RB25. Steven

These spacers do not change bump steer as they do not change the relationship between the control arms and steering arms, they only move it back in to a more agreeable range, so they can help. But the bigger benefit of them is that they shift the steering scrub axis a bit closer to the centre of the tyres contact patch, which is something all our earlier 240Z's can sure use. this helps stop that tracking over ruts and helps them to stop in a straighter line. Steven

A used RB30 short motor ( no cylinder head, as a lot of the single OHC heads cracked )can be bought for less than $500US here in Australia. I got my RB25VVT head for $225US, why not build your own? Steven

Just a side note on what Arch my260 was saying about his Dads car and the SU's being restrictive. I was running a L28 with a fairly large cam in hillclimbs that were timed to a 0.01 of a second, and when i changed to EFI with a 65mm throttle body my times didnt improve at all, the enginge was more flexable and ran nicely from cold to hot with the EFI.But i think the old su is a very under rated carby, and i wouldnt be in a rush to get rid of them. Steven

I had a supercharged L28 in my old 240. It was a toyota SC14 and was a very nice compact unit. The bottom end and mid range were fantastic, but with no intercooler in was lacking in top end power. You can see pic's of the unit in my home page. Steven