Quote:
Originally Posted by Pretty240
I'm not sure what EFI means but I definatly don't mean LPG! I wanted to know the pattern of the inlets on the head as I'd thought of going with throttle bodies. As to the exhaust the manifold is a straight box with the no thought of gas flow and I'm assuming that a freer flowing manifold would also improve the MPG.
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EFI = Electronic Fuel Injection.
Throttle bodies won't really help you be more efficient, they're more of a pretty serious power upgrade, i.e. after porting/polishing the head, long duration/high lift cams, big exhaust, big air filter, lots of other expensive fiddling... And they're bloody expensive, you're looking in the region of £100 per body and you'll need 6, plus linkages (£50) and a custom manifold (£300 x 2), then injectors (£50 each), it soon adds up in a really bad way...
As to the exhaust a free flow manifold is really about helping flow at high gas speeds, i.e. high RPM, which still won't help your MPG much and again it'll need to be custom (£300) and you'll need two...
Are you thinking of doing the management conversion yourself or getting it done for you by a specialist?
Either way I highly recommend you go here
http://www.msefi.com/index.php and read
everything
The first thing to do to improve your consumption would be to give the engine/drivetrain and damn good service - change all the filters (air oil fuel), change the oil, new spark plugs, new ignition leads, new distributor cap and rotor arm, new coil, clean all the breather pipes, check all the induction pipe work. Then have the fuel system pressure tested and reset if necessary.
You might be surprised how good the standard setup can be when in good condition.
Isaac
P.s. Whereabouts in the country are you? I'd be more than happy to come and help you if you're not too far away.