GTSBoy

The 25% loss on roller dynos is not drivetrain. It's tyre-roller interface. That argument is long dead. If we do not want to have to confront that issue, then hub dyno is the only answer. As to the BSAC number.....look at the map. 80 lb/min is off the side of it. So even a lower number is in the region of low efficiency.

600 rwhp is typically about 800 at the engine, is typically about 80 lb/min of airflow is right up against the RH edge of the turbo map that that relatively low boost number you report.

It seems to me, from a casual inspection of the compressor map, that at ~80 lb/min and 1.65 PR, you are right up against, if not to the right of the choke line.

Teach me not to send replies in the middle of the night.... In the above message, I meant to say "Well, ticking hydraulic lifters...."

No. The AL400 and 410 will simply be because one is front and one is rear. They're not the same part because one has the stud. The specification will be otherwise identical.

Well, ticking lifters is usually just a (lot of work) clean, soak in oil, reassemble, or at worst, replacement, exercise. But solid lifters can only grab in he bucket bores if something has been damaged. Scuffed, squeezed, broken fragments of something else stuck somewhere, etc etc.

Can be a sticky bucket - which in a solid lifter head is close to the worst thing you want to have happen. Well worth popping it open and having a look.

You know the meaning of the offset changes with the width, right? So a 7" wheel with +30 offset has different rim edge positions than an 8" with +30 does. An 8" wheel will have both the inner and outer edges 13mm further away from the hub mounting faces than the 7" will.

If this is to advise an engineer of the load rating of the wheel so he can sign off on it for some bullshit technical regulation, then tell him to pull his head in. As Duncan ^ says, this is not a number that you will find available for almost any wheel. Therefore it is almost impossible to satisfy any requirement to provide that number. A pragmatic approach might be to say that they came off a V35, and so their load rating is going to be more than sufficient for the heaviest variant of that model that rolled on that wheel.

Actually, it will. In stock form. The turbo might choose to throw a wheel though. Seen it happen to an R34 at stock boost at Mallala

What's your HICAS situation? You can't use R33 pumps on R32s if you still need to pump fluid around the rear steer circuit. If you have deactivated it, then going to a single stage pump means you can just pis off all the rear steer stuff. Sadly, I don't know if the R33 pumps fall onto the RB20 or if you need to futz with the mountings and/or pulley. I am reasonably sure though, that the question has been asked and discussed on here before, so have a search.

Thank you. I'm here all week. Tip your waitresses.

Yuck! Why would you make an R34 look like an R33? 😛

Are we going to take bets on some sort of blanking caps left on/in the new injectors?

Whilst there may need to be effort put into wiring up the Jatcrapco to the Haltech, surely we're at the point now where this is achievable, no? https://support.haltech.com/portal/en/kb/articles/transmission-control

Yes. The is about modifying engines that already have VCT and hence an internal supply. Your block doesn't, requires external feed added.

Yuh. They're ^^ correct. That is clearly mechanical friction happening. You do not want to push that pedal while the engine is running EVER AGAIN..... at least until it is all out on the workshop floor and you find out what is rooted.

Consult is the name of the Nissan serial databus interface, and is extended by us all to describe any device that can talk on the bus to the ECU.

No. The RB330 block is arguably weaker than either, because it is taller. None of the RB blocks are particularly good, but the 30s have a longer section up near the deck with very little reinforcement. There is little to no difference between a 25 and 26 block. There is absolutely nothing special about the 26 as a block or engine. It was just a mass produced engine. People go RB30 for one reason and one reason only. Capacity. (Which leads to torque, which leads to power, which leads to everything being better).

Is that not the worst AWD system ever used in a car since the one used in the Calibra?

My immediate reaction to these inquiries is always "It's just not viable". But.... I suppose now that values of 34 GTRs are stratospheric, the money (and the effort) spent to "GTR" convert a lesser 34 is going to be nowhere near the value of a GTR. But, I do have to ask.....what's the point? The RB25Neo is just as capable, if not better than the 26 to make power from. Even if you put all the widebody panels on the car, it still won't be a real GTR. So.... why not just build up a GT-four?

Oh no. That R34 wing is dreadful. Looks like it belongs on a Honda. The whole back of the kit is bad actually. Only the front is OK. I belong to the "R33s are boats that look like a Maxima aggressively rear ended a Magna" camp. The profile of the car is poor. The length between the back edge of the door and the rear wheel arch is just too long on a 33. The front is bland in a Magnaesque way and the rear is just f**ked up. The R32 maintains the correct proportions from the cars that created the look (ie, the early Mustangs, and to an extent the earliest Skylines) that sort of survived in the 70s Skylines but definitely was solidly in the design language of the 80s Skylines. The R32s only blemish is really the front end of the bonnet. But that can be changed. The R34 brought back the correct profile and proportions. It was actually confrontingly square when it first came out, but that soon passed. The only blemish is the slightly incorrect taillights, but they are much better than the very wrong lights on the 33 (and the lower end and Aussie built 31s). Equal sized stoveplate rear lights are a requirement for a proper Skyline. You have to slap a lot of tupperware onto a 33 to mask all the problems.

Imagine all that love and attention paid to a car that actually looks good. Like a 32 or a 34?

Assuming HP at the wheels, then you might struggle to make it. I don't have any direct experience on this sort of setup, but just looking at the compressor map, and thinking of a single one of these on a 1.5L engine needing a lot of boost to make 475-500 engine HP, then there's a bit of a conflict between the likely 2+ bar of boost required to make that sort of power and the need for the compressor to be flowing 45-50 lbs/min of air. You'll be right over on the RHS of the map, over near the choke region, pulling middling efficiency and running close to max shaft speed. But, if I had to guess, I'd say it would be a ripper and do pretty much what you're asking for.

Shall we presume that this is at the wheels in Australia on something like a Dyno Dynamics? Or at the hubs? Or at the fly?