Cubes

I used to have 1bar by 3500rpm under general driving conditions on the road, on the dyno or up a hill in a high gear it would make 1bar slightly under 3000rpm. EDIT: hehe used to.. Now the bastard small arsed turbo boosts too early and creates surge under ~1700rpm with 9psi. It can make 12psi by around 1600rpm in a high gear but nasty pop noises and bucking occurs. There's no replacement for displacement.

My RB30 block definitely has 2 head drains. Between cyl 1 & 2 and cyl 4 & 5. With regards to oil pressure. I've only got the stock guage. Cold starts oil pressure is over the 8. Idle is just over the first line or 2. Cruise is over 4 WOT 4000rpm+ see's approx 7. I don't understand, I need to see pics? I did quiz my engine builder about the problem GTR's tend to have with dumping oil in their head, he assured me mine wouldn't have the issue. I'm unsure if he fiddled with the oil drain.

What oil pumps are every one using? I'm using a rb25det one and haven't noticed it yet. I ran ~1500km's on running in oil & the rest of the 10,000km's with mineral oil. Then switched to synthetic and had it tuned, currently I don't have the slightest smear of oil in the inlet tract. I did have a slight smear that I cleaned every few hundred kays up until 1,500km's. I have missed the head and turbo train T. Mine hasn't got it. Simply bolted the head on. I will have to check pics to see what Andrew did with the oil drain.

N/A springs are softer and will float up over ~15-17psi.

Adj. cam gears.

All ball bearing highflows are up around 2k. Bush bearing are a shade over 1k. Now that GCG have started to play with the VG30 housing maybe they will bring back in their 500hp variant, previously with their 500hp highflow variant it would surge and carry on a little. The bigger vg30 exhaust housing will eliminate this hopefully. Might even nudge 290-300rwkw IF a big IF they can get the wastegate flowing enough to prevent boost creeping through the roof.

Where's these pics?

Cap uploads around 10-11Kb/s. Bittornado is a decent reliable torrent client, I find it performs better than the popular Azureus. Any more than ~10-11Kb/s and you will have trouble sending ack packets to your sender. In lamens, the sender sends a packet and waits to hear back from the receiver, once it hears back it sends another. You need to reserve some upload bandwidth for ack packets. Also.. Don't go doing these 'rwin/mtu etc optimizations' you find around the web. Often than not they only make matters worse. WinXP does a fairly good job on its own.

The Z32 and RB AFM's have very similiar airflow curves at low voltage/airflows. The resolution at low airflow is basically the same.

If you've fitted a new pump and now getting a flat spot it will be due to it running too rich. Drop the ign. timing back to where it was and pull some fuel out of that area. Be carefull though. Unfortunately you will never know exactly how much fuel to pull, looks like its dyno time again. Be carefull, those rb25det ring lands are fragile.

My Extreme organic 800kg clutch used to shudder if it was ridden heaps. Most of the time it was fine, peak hour traffic it would start to get hot then shudder. BUT... my gearbox had a slight input shaft seal leak, I suspect this was causing the shudder when it got hot.

Its to help direct the flow in the stock manifold. Remove it if you are planning on using a nice tubular manifold. In reality there is bugger all in it.

Fat32, if the setup is prone to dropping boost as you are running the turbo at the limit it will be benifitial to run a ebc that monitors the boost and adjusts the solanoid in real time. Simple ebc's where you dial in a knob or duty cycle percentage don't cut it. Depends if you really want that extra 15rwkw from pushing the turbo just that little bit more. If its not the case and they turbo can supply the amount or air required then I would say the bleeder you received was a dodgy item.

I must be a knuckle dragger. The 3ltr rips the 2.6/2.5 and 2.0 ltr a new asshole, lol well it will once it has a decent turbo on it.

I would say you are lucky.. Roy wasn't so.. Apparently glycol (in the heater hoses just behind the turbo) when sprayed in a fine mist is extremely flamable.

Simply drive easy for the last minute before you get to your destination. I've done 186,000km's on my stocker turbo now, 67,000km's on stock boost, the rest on 1bar.

I'll leave the thread for a little while, I'll hear from Christian anyway.

Nozilla, If your advertising services we would like to see at least a donation badge under your avtar.

I've been told by quite a few people not to run it in with boost. Chris Milton Engineering (Well known for their involvement in GroupA) and also my engine Builder Andrew. I wired open my wastegate and drove everywhere with a flat foot changing up around 3000-3500rpm with the occasional 4000rpm. Gear Deceleration is very bad for a motor that is being run in, simply drop it in neutral. I used Penrite Running-In oil, I changed the oil multiple times within the first 1500km's then I went to a Motul Mineral 10w30 oil. I used that until the motor had done 10,000km's then went synthetic. My reason for using mineral for 10,000km's is the motor wasn't ran in on a dyno. I made sure the rings had bed in properly. They have appeared to, even with the largest recommended bore to piston clearance Wiseco recommend, it uses ZERO oil over a 5000km' oil change, its now done 16,000km's. There is zero blow by in to the intake piping. Everything is as clean as a whistle.

I seriously don't think its going to fit. If it does under hard acceleration its going to pop up the back end of your bonnet. The RB30 sits 40mm higher than the rb25. 40mm is quite a bit.

Sounds fairly spot on SK, I was very close to 5v on the std RB20DET afm (which actually was a R33 S1 AFM) before the tune so obviously a few more rev's I may have seen it hitting 5v or slightly over. I made sure before the tune I wired in the Z32 AFM, it has hit a highest of 4.1v on Load point 18/19. Where did you grab the R33's Airflow airflow value at 5.1v? Going by the table below (taken from FC_Pro Apexi Software) R32/R33 at 5.1v has an airflow value of 4423. It doesn't make sense. Especially when you look the Z32 apparently has a higher airflow per voltage than the VH41?!?! Discopotato, The airflow reference map from a VG30 would be very interestering to see. It appears the FC-Logit doesn't do one for the VG30 nor does the Apexi FC Pro Software. Both softwares do one for the 2JZGTE, might see if I can grab it from the FC Pro Software.

Just to note, I noticed for example. A load is placed upon the motor that is inbetween two airflow values. The PFC will do a linear (I assume) calc and determine the value to use for that load. So providing airflow and ignition timing required is linear between the two load points the pfc will do a pretty damn good job working out the optimal value. It will only do this where ignition timing or fuel has different values between load point cells. Hope that makes sense.

I've stumbled upon an interestering airflow vs horsepower relation. After using the rb25det reference map, the airflow required to make ~200rwkw now uses load point 15-16, previously with the rb20det reference map it was maxing out at load point 20 to make the same power. Calcs.. It appears that the rb25det reference map has been scaled enough to support ~325rwkw of power on the same dyno and peak RPM as I and Bl4ck32 use. I find it interesting that I am making ~176rwkw and using load points 18-19, both Bl4ck32's and my power figure is supported by the calc. :lock: Obviously an rb20det, rb25det or rb26dett may make use of the air supplied a little better or worse, the power figure as a result 'should' vary with different motors and RPM! Now to find some one that knows the power they make at approx 5000rpm with a PowerFC and see if the calc can 'predict' the load point they will use. If it appears to be fairly accurate, we will be able to weed out those bodged dyno power figures. I haven't really thought about rpm at this stage, I have no idea how it scales its airflow/loadpoints as rpm increases, or if it does at all. My map trace is horizontal, from 2000rpm it drops to load point 18-19 then sits there all the way to peak power. As an engine increases RPM its supposed to increases its airflow requirement. :confused:

Well thats a different story then. Bolt the vg30 exhaust housing on the rb25 turbo for sure. It will shift the rpm band upwards where you actually use it. lol 2000-3000rpm acceleration sucks after awhile. I plan to bolt the vg30 exhaust a/r on the stock rb20 turbo and give it a cheap tune to see how exhaust a/r affects top end power and the speed of the car. At the moment I have to change up at 5000rpm or a shade over, thats 3 gear changes to 100km/h and also .5 of a second slower to 100km/h. It really needs to rev more to take advantage of gear speed.

You ran a VG30 Steve? I had a VG30 BB on a RB20DET, ~4100rpm for 12psi vs the rb20det turbo making ~12psi at 3000rpm.