2.7. Head work, 'fast road' cam and twin carbs? Worth it?

[djaychela]

ORIGINAL: captainsmelly

With the camshaft, I'd like to see how the profiles stack up. Sounds like there's no overlap at all? Would make sense with batch injection. So maybe a megasquirt fuelling setup, retaining standard afm and intake (maybe clean up the insides) custom cam ground for overlap would be cheaper and better solution?

As said above, no need for the AFM with a Megasquirt (and indeed all the aftermarket ECUs I've looked at) - they will use a MAP sensor (and/or throttle position, depending on the mapping strategy you use) to sense the load on the engine, so you'll have an increase in inlet flow already.

ORIGINAL: captainsmelly
The manifold looks very well set up to my (untrained) eye. How well does the rest of the exhaust system flow? It's rather quiet and I really don't want to go down the 4" backbox route again (I was young ok) but maybe replace the center box with plain tubing would help?

A lot of exhaust noise will depend on the cam profile - when I changed engine/cam on my rally car the exhaust got about 4dB louder just from that.

ORIGINAL: captainsmelly

To clarify then, carbs are a no no. Throttle bodies are cheaper than I thought though, I'm seeing full kits for 1600 - 2000 quid, including ecu, injectors, fuel rail and sensors. The largest I can find in catalogues are 45mm but I'm sure they can swap to larger sizes with ease, jenvey build them up to 50mm.

Yes, carbs are a no-no. A mapped setup gives you complete control and is cheaper (quicker) to set up on a rolling road.

Bear in mind with throttle bodies you don't have chokes in them to create decreased air pressure (to suck the fuel out) - they are the same ID all the way through, so you won't need as large a TB as you would a carb.