CamB

Speaking of which, my road-going M3 would be many times faster than the 2002 on the track (haven't tried) ... and I suspect would still be faster following the 2002s turbo conversion. IMHO, race car = stripped and/or roll cage, ie useless for anything else and intended for racing. Occasionally you see car's which meet this definition (eg Evo) which are road cars. They're not a race car per se, but they have race car performance.

LOL, will be "challenging" to get them to fit, even with appropriate tyres.

I suspect the long exhaust runners are chosen to suit the long duration high lift cam. He's made the engine to rev.

I did an anti-skid training course which I'm sure is no longer available. Was fun - not that helpful, but fun. This is so true. I bet if "boy racers" (I also dislike the term) did the following, there would be no police issues: - drive around without disturbing the public (ie, cars not too loud, not too late) - no alcohol in the streets and associated problems - no burnouts, no racing It also wouldn't be what those young-uns term "fun". So basically the problem is the police want to restrict the fun simply because it disturbs the peace. Unfortunately, that's a fact, rather than opinion.

+2 on the guy in the the truck (it's Pete, who races a kermit green 2002)

X5V8 - In the thread I linked to... where you already asked the same question!!

This? http://www.bimmersport.co.nz/forums/index....hl=alpina+coupe

Turners eh. At least it might actually sell this time.

"Preventing work since [ ]"?

Yep, should fit fine. If its a fuel injected (CIS) E21 engine it'll require some additional work though (getting high pressure petrol to the front). There is, by the way, a 0% chance of finding the alloy trim around the middle of the car (that's why there are holes) in good condition and at a reasonable price. My race car has stick on plastic trim with chrome "plating". Haha.

True. It looks like its been repainted. If someone buys it, I have a complete and low km tii engine (102hp at the wheels on the dyno) and basically everything except the clutch pedal, master cylinder and lines to convert it to a manual (4spd). Will be pricey. tii bits are $$$.

Have you tried assembling it? The 2.93 might be thicker if the matching pinion is a different size (smaller)? Am mentally struggling to see how smaller gives a taller ratio tho, so maybe I'm wrong.

I think the problem is the other way - a 2002 block can't go into an E30. I've got an E30 engine in the 2002 at the moment.

Good luck getting anyone into the back, even with coupe seats. Door aperture would be too small I reckon.

I'm not sure it is - I looked into this in the past and the turbine map is the pressure ratio across the turbine (nothing to do with the boost the compressor side is making - its the pressure in the exhaust manifold, ie turbine inlet pressure / backpressure) and needs to be modified for temperature too (temp of exhaust much hotter than temp of air going into the engine, which is your 35lb). TBH, I don't entirely get how to apply it. OK, I do - its just maths, but you can't know turbine inlet pressure without measuring it on an individual engine. http://www.owendevelopments.co.uk/turbos/garrett-turbos.asp How does it work when you look at the turbine graph - beats me! BTW, I think 62% is like the efficiency islands on the compressor map, not how you used it. Anyway, the more simplistic way I understand it is that the key is backpressure in the exhaust - once it gets too high the backpressure pollutes in intake charge and you get hotter and less oxygeny (a technical term, surely) air. Apparently 2 valve engines are more susceptible to backpressure, in particular as they need to run more lift / duration to get the same flow as a 4 valve head. Even more apparently, a rule of thumb is that you know that you're getting backpressure problems when the backpressure is more than about 1.5x the boost. Back on what you said, while a big wastegate might get around (literally) the restriction of the too small turbine, but it might be unable to run a decent level of boost without excessive backpressure, and/or hold boost at higher revs without higher backpressure. The wastegate won't help the fact that the turbine is too small - it opens with boost pressure, not backpressure, so I think the backpressure problem would remain. I reckon it would be stink to drive too - a massive spike of torque at ~2500rpm would be tough to drive smoothly. So I reckon GT3071R, maybe with the spangly divided housing you can get (basically it ends up a ball bearing GT32). T3 is where its at. T25 too small - potentially even for my 2 litre, although the 0.86 might be a decent compromise. It does, of course, depend on how much boost you plan to run as well. Happy to be proved wrong on any of this by the way - most of it is also just research and/or thinking about it. I'm aware that SR20's quite happily run GT2871R and GT2876R making good power and seemingly unrestricted by the smaller a/r. They are a 2 litre tho.

Yeah but that's all a pain in the arse for a turbo. If I was spending up, I'd just go for a fabricated plenum with equal length runners and a plenum size designed around my engine / camshaft / turbo choice. As the standard M10 one has shown not to be a hindrance to about > 400hp, I'm not inclined to bother for my application.

I find it difficult to see how they'd be worth the bother and cost on a car with a turbo (surely lag masks any increase in throttle response), but having said that the RB26DETT (Skyline) and SR20DET (only the GTIR one) had them.

Good plan - get the thumbs up from me.

You guys are all obviously way to young. That is one of the oldest pictures in the internet and the beginnings of a massive photoshop thread of lumber being put in strange places on vwvortex from probably nearly 10 years ago. (edit) It's actually so old I can't find archives of the original pictures / thread etc! It was in 2001.

mops has 1 bar at ~3,000rpm in third gear with an Hx35 on his 2.7 M20. It depends on a lot of factors not the least of which is the gear selection and how much load the engine is under. Incary - how did you work it out from the turbine maps? I want to try do so with my own engine. I have a GT2560R (going on a 2 litre M10 with an NA cam) so can see the turbine map but have no idea how to interpret it (I understand the compressor maps). I've seen a dyno of a Gt2860 on an M20 2.7 which peaks low - like < 5500rpm. I think it did get good boost by 2500rpm though. However, I think I recall it being a T3 0.63 one, which is at least as big as a T28 0.86 a/r. I think a 2.5 M20 needs at least a GT28 0.86 or a T3 0.63 - the T28 0.64 will be too small. It'd be like driving my wife's Skoda - a massive rush of power and torque, followed by a long declining tail of power. Hard to drive, to be honest - I'd rather more progressive boost buildup.

Have you figured out calcs to work out when a turbine is maxed out, coz I am super-keen to work this out for my own engine if you've got them.

Cams probably wont help as it appears the exhaust housing is an 0.63 which might be choking it off up top (but helping with spooling). An M50 already has naturally aspirated cams which are going to hold on to higher RPM than any typical "turbo" cam, which often have high lift, medium duration but close (or is it wide - can never remember) lobe separation. I'd just wind it back to 12psi and enjoy. I suspect 250rwkw is enough

All this year I've been driving along, maintaining a good following distance, not speeding, letting people merge when they wanted to regardless of whether they were being a d*ck about it and I haven't had a single road rage incident or been stopped by the police. It's really strange. It was the same last year and the one before that and basically as long as I can remember.

Double check you have the cam timing right. Then triple check it.

I think so - the seller upgraded to an M3 Evo