THORNSPAWN

That's the best pic I have unfortunately. It was years ago. the manifold sections don't sit inline but it wouldn't be too hard to join the runners.

LOL been there done that! Had the center 2 runners from 3 manifolds cut up and blocked off. It had a broom handle for the linkage and no tuning so it ran like shit but when it got up in the revs it went suprisingly well. Exhaust was twin 2 1/4in out under the drivers door.

Just amp the fronts and run the rears from the head unit.

Voice coils are measured in ohms impedance which is the inductive resistance of a coil and changes with frequency. The lower the impedance you run the hotter the amp will run, you will also have higher distortion, the only benefit is more output from the amp if it can handle it. Capacitors are largely wank factor and are generally used to assist an otherwise inadequate electrical system, if your voltage is dropping too much you need a bigger alternator and ideally a second battery in the boot with a short wire straight to the amp.

Locking STOCK cams is stupid. I doubt anyone running highly modified engines with locked cams actually still have stock cams in them.

Better off with EFI though it would work. there is nowhere to install a dizzy in a BA block so you would need a computer to run it anyway. Locking cams is also a stupid idea. You have all the features of a BA motor why remove them all and go backwards?

BA BF injectors most definitely spray in a split V pattern they aim 1 jet at the back of each valve.

I'm sure you all know by now that the injectors in BA BF turbos and even F6 are exactly the same as standard injectors and I hope people don't pay more for "turbo" injectors. They also spray in a V pattern so are next to useless in a round port as they will just spray at the port walls.

I know very few audiophiles who use MDF, All my fullrange horns are 15mm marine ply with 19mm baffle and only use 4in FR drivers, ply has much better stiffness than MDF as well as being airtight and doesn't leach formaldehyde vapour. Ply will resonate less than MDF which is more uniform density making it more susceptible to resonance. The last reference monitors I built had 38mm ply wall thickness with 50mm baffle plus extensive bracing including clamping the magnet to the brace. Enclosure rigidity is VERY important. 12mm MDF or ply would be suitable for some small bookshelf speakers with 4-5in woofers but not a sub. Many people prefer MDF because it's cheap and easy to work with but it's inferior.

12mm MDF is way too thin. I don't use MDF at all. I'm building some 10in subs for a customer at the moment they're 25mm thick marine ply with internal bracing. With MDF the actual board is not air tight at all, it's not just the joins. Some simple dowell struts from one side to the other and top to bottom will make a big difference. I'm not knocking your build by the way.

I'd be adding a heap of internal bracing to that box it's very thin walled and will flex like crazy, also being MDF you'll need to completely seal it inside, MDF is about as air tight as a fly screen door. Good work though it will look good once carpeted.

0 280 155 903 is AU V8

AU injectors are all good it's the BA onwards that have a "V" spray pattern

The I6 is larger capacity per cylinder than the V8. I don't know why people always assume V8 injectors flow more. That being said they're pretty close and should be fine.

Good. You'll rarely use more than 10W without your ears bleeding so don't worry about only having 50W