Having aquired a (soon to be un-mullered) 3.0L v6, I'm having a stab at building some tapered tb's for it. Sounds ambitious? Well it would be, except for a couple of key things.
the heads are basically the same as the 1.6 16v, except for having 3 cylinders per head.
the cylinder cc is the same as the XE (bore is 86mm, stroke is 85mm)
The main problems are that there's **** all space, as you've got to try and fit 6 tb's in the space 3.5 tb's normally fit in, and that the bonnet is going to have to be extended up so that the induction system will be long enough.
The basic paramaters are:
45mm throttles (sourced from heavily chopped varijet2 carbs)
throttle plate will be approximately 200mm from the inlet valves
overall length will be 35-40cm in length
each cylinder will have 2 injectors, one in the trumpet, one in just past the throttle plate. It'll use either all XE cream injectors or bottom ones V6 upper ones XE Cream)
I'm prototyping it using plastic (white chopping boards) as it's easy to cut and very cheap. Final system will be a mixture of aluminum and fibreglass.
It'll be controlled by an emerald ecu, as it's much cheaper than the alternatives, and can do everything that's needed.
The exhaust manifolds will need to be fabricated, as the std headers are dire (the 3 exhaust ports each side are connected together with a cast iron box). Which will be fun. again, the XE and 1.6 manifold design are available, and coupled with a few informative books on exhaust design, I'll have a field day with it!
The rev limit of the v6 can be approx 7750, as the stroke is similar to the XE, and ARP rod bolts will fit.
If the 1.6 16v can make 164bhp on TB's with std cams, i should be able to get 280-300 bhp if i can get the TB design correct and the manifolds effective.
I've looked into getting some cams made for it, and i'll need to get them cut from billet as blanks aren't available, so it'll end up costing about a grand for a set of 4 cams.... still, if the 1.6 can make 190 from the 284/278 cams, then the v6 could make 320 - 330 Bhp ish with 240ish ft/lb.
Understand that these figures are very ball park, and were obtained by dividing bhp by cc, then multiplying by the new cc then taking some off, to try and take into account the valve areas (The 1.6 has much more valve area which will help it at higher rpm).
Photo's to follow..........