2.8 mfi to efi worth doing?

[rich_mkii_rs2000]

am thinking about convering my mfi 2.8 tt capri to efi (ford efi not megasquirt)

would it provide any power and economy benefits as currently my mfi system pours petrol through all the time in order to meet the fuel needs when it comes on boost and can only supply enough fuel up to 5500rpm.

[popuptoaster]

My Xr4i was about 10% down on power but 20% up on torque with the Mfi replaced with Efi, it was also slightly better on fuel than all my previous ones, that may have been down to the increased torque allowing me to stay in higher gears longer though.

If your going to bother mucking about with all the bits needed these days though i'd just chuck a 2.9 in instead, its a better engine and mucho easier to find all the Efi bits than for the 2.8, which only came on the late 2.8 grannies

[therealpinto]

With turbocharging you really should go programmable EFI if you want to make the swap. That will open up a whole new world for you, trust me.

I have been involved in running turbo 2.8's with both MFI, Ford EFI and then Megasquirt. The difference is huge.

Gustaf

[Zetec_Escorts]

EFI it and add a megasquirt using wasted spark. Will work a treat and get the most out of your engine.

[rich_mkii_rs2000]

i expect that will be my eventual route.

what money am i looking at for megasquirt though

The engine is producing 212bhp and 270ftlbs torque so am not too bothered about getting any more power/torque but it just drinks fuel at an incredible rate. I know i sholdnt have bothered having the engine built for it if i was expecting to get an economical car but its heading to the point where every time i take it out i think of the cost.

[Zetec_Escorts]

Depends on the version of megasquirt. But, approx £200.

[therealpinto]

The thing with Megasquirt and programmable ignition is that you really can make an ignition map that suits the engine both off and on boost. The lower cr most turbo engines have means they often benefit from a lot more advance off boost than a n/a engine.

At least that's my experience. The 2.8 twin turbo we used to run, with US 8.2:1 cr pistons, was really flat off boost with the standard EEC-IV ignition curve. Once on MS, we ran up to 45 degrees of advance in some points off boost. This made the engine a lot more responsive and it also cut fuel consumption.

So I think that if it's more economy and drivability you want, I'd say that's an even stronger reason to go MS.

You could do it in steps though, if you fit the EEC-IV and hardware first, it's easy to swap to MS at a later stage.

Regards

Gustaf

[rich_mkii_rs2000]

cheers for the replies guys much appreciated