dr_mat

Ok. Still don't know what might cause it...

So you have a 2.8 throttle, and a 2.8 inlet manifold, and 2.8 cams, and a 2.8 ECU on your 2.9 .. ?

The tricky bit is getting the new bearing into the old pulley without breaking it ...

Hmm. How's the wishbone bushes looking?!

Low brake fluid?

You said yourself you'd never really noticed it ... you could just keep your wallet in your pocket ..! No, sorry, I know that once you've found a problem it's got to be fixed. Don't know what came over me there for a second .. sorry .. ;)

Most likely cause has *got* to be warped disks .. despite the recent replacement. What type were they replaced with?

Recommended procedure is to refill the system via the top rad hose, iirc.

Those are high water temps in general, should be 90 or less when you're moving along. The noise is certainly the right area to be the water pump I guess.. Can you remove the belt tension and see if you can turn the water pump by hand?

They did all that fannying around and they never put it on the track? What *were* they thinking??

According to that thread, you can get the hardware for about £250 maybe, but then you have to budget on 2-3 days skilled labour to fit it .. Benefits? Better running, some more power, better fuel economy, better engine diagnostics..

Yes, you're all right. The 1.8 8v engine can be made to produce 110-115 bhp without too much struggle from what I understand, but that's not going to work well with a G60 bolted to it (too much compression, as stated above), so the G60 engine requires the charger. From stories on here, it seems about 80 bhp is about right for an uncharged G60. So there you go.

Well in my case the vague steering on the motorway (amongst other places) was finally fixed by fixing the play in the steering column..

The old Vauxhall 2.0 turbo was 200+ bhp, iirc..

Well maybe..? But air flow volume at 50% throttle is less than at 100% throttle, so it might well rev freely(ish) past a certain point, but it won't be able to flow enough air to sustain the power. What oil are you using? Does the engine and oil temp run up to normal?

Oh yeah, remember talking about that now. Weird...

It's impossible to answer that question! Technically you weren't insured as you hadn't notified the insurance company of a significant change to the car! But they may decide that you didn't do this maliciously, or there may be a clause in your policy that gives you a certain amount of time to notify of changes such as this... So: should you tell them? Well.. depends on how good you are at lying .. But then you'd be pushing my insurance premium up too, so personally I would recommend you don't lie.. ;)

And you're sure it's not just the rolling road? I mean, when you say "performance drops off" how is the torque curve? What's your torque figure at 5500 rpm, say?

Swap the filter anyway ... You may also have sucked some air up into the fuel lines, so you may just have to wait for that to blow out the system before it sorts itself out.

How does it run above 4800rpm then? Rough? Smooth? Not at all? Noisy? Pinking? What did the A/F gauge say up there? Any engine temp weirdness? Valve timing is still primary concern ... How long has it been doing this? What happened when it started ..? Have you tried a standard ECU and map?

I like it. Well. Apart from the blue tint .. Sadly they don't make 'em with 5x100 PCD do they...

5. cheap petrol ...! People are less inclined to drive around in 1000bhp skylines when it costs them £200/week in fuel..

Is it not possible to mount the standard OBD1 VR6 sensors to the 24v engine and just get it remapped? Genuine question, I don't know the answer... Might be easier than having to change the whole loom and clocks etc etc..

A flat spot ...?! when you're not pressing the throttle?? I'd concentrate on the clutch. It will have had to be removed to get to the timing chains, so as someone else said, that's probably where the issues are. Did you put the crank sensor wheel back in tightly? It's possible (I believe) to get those in the wrong place or make them loose so that the ECU has trouble and shuts the engine down for a revolution or two ..

Never doubted the dynamic reasons for shifting that lump of weight into the boot.. But the practicalities of it obviously hadn't been thought out by the person who originally asked! :)