Usually there's one for ignition signal, one for dash lights, one for power and one for ground. Red is usually power, black is usually ground and you can probably figure out the other one by grounding black and trying the other two with +ve and see when the light comes on. If unsure use a 9V battery since it wont do any damage if you hook it up wrong (they can't supply much current). Hope this helps.

I understand the point about cumulative losses in the turbine/ compressor etc. It is true though that a super charger ahs a 0% effecient turbine in that it doesn't have one. And yeah I agree there's no point to series turbocharging unless you're shooting for 45-60psi boost. I still think it would be a cool project if anyone was brave enough to try it. 60psi boost would make one mean machine! Be verging on a turbo compound engine like was used in aviation and locamotion before gas turbines were enabled through better materials.

By breaking blocks do you mean the bore, block its self shearing it in torsion or something else? I'm interested to know more about the mechanical limits. I would think that lowering compression ratio would lower the peak pressure in the cylinder but this equally increases exhaust temperature so perhaps the exhaust valve will melt unless there's water injection (shown to reduce peak and exhaust temperatures).

The thing that gives me an idea it might work in a 4cyl is that the crank and everything else has to be strong enough for peak pressure and peak inertial forces (I think the inertial forces are generally larger once the revs get up) and that the power strokes don't really overlap. Maybe this is a project that needs to be done to find out? I'd gladly donate some time and labour to it. Or maybe I'm crazy, fun thinking about it in any case.

ddgonzal is on the money for what I mean.

Not totally sure but I think that was a sequential setup. I read about turbo compounding in book on turbocharging, I think it's been applied on larger diesel engines from memory. It would be a cool project.

Here's a wacky question. Has anyone attempted to compound turbo charge an A series engine? i.e. where you use two turbo chargers in series to achieve much higher boost pressures. If each turbo uses a pressure ratio or 2 then you et something like 45psi boost but the wide map of each turbo at a PR of 2. I read about this ages ago and wondered if anyone's tried it.

The downside is these systems tend to be a bit laggy having to spin up one turbo and then the next but some serious power could be extracted assuming the internals hold up. The upside is large boost and the opportunity to intercool twice and increase compression efficiency.

Not sure if it's practical or not but it would be pretty cool to see a 400HP A series!

It will be fun to see your responses!

I have very similar CBR600RR throttle bodies I'm planning to put on my A15. There are two pairs joined in the middle. I plan to seperate them and alighn the centre of each pair with the centre of each pair of ports on the head for symetrical runners. At 80mm centres you'd need to add about 18mm to the space between the pairs, mine are 74mm centres. A work in progress, slow progress.

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Is this what's left now?

Alloy battery tray
All the interior, gauges, seats
Standard tail shaft
Standard susp
standard breaks all round

Fitting quad throttle bodies, I just didn't bother drawing the throttle bodies.

Thanks

I've added some pictures of what I'm planning to build and figured out what materials will be about spot on.

There are these parts available on ebay that would fit the bill as far as constructing the manifold fairly easily.

8x of these for the S bends
http://cgi.ebay.com.au/ws/eBayISAPI.d ... &ssPageName=STRK:MEWAX:IT

4 of these cut to 165 degrees and cut and shut to make the trumpets.
http://cgi.ebay.com.au/Set-2-X-1-3-4- ... ories&hash=item2a0959cf84

Be about 100 then I still need to make two flanges and some other pieces of 32NB sch40 pipe and some 2 inch pipe for the throttle bodies. Any better ideas? Would it be cheaper to go to an exhaust place with some drawings? Any suggestions?

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