As per title

EFI head onto my engine, is it ok?

and how

 

Why - I remember being told by someone in the know that the MFI heads are better and less susceptible to corrosion in certain places.

 

Speak to jano he does plates that do this job.

Darren

 

Fiesta turbo head is the same as any other 2i or 3i EFI head - so yeah it will fit and be OK. Port shapes are different so you'll need adaptors or the EFI manifolds. It's still 55cc chamber and the same water, oil, and head bolt setup - there are heart shaped heads these wont run, also 1.4 heads may not run either....just CC it to be sure.

 

I dont agree with the MFi head being better....

It may be "less susceptible to corrosion"

tbh i have not noticed any differrence in the MFi and EFi heads to do with corrosion once they have been cleaned properly. In general the MFi would be older than the Efi and if it is the same age as the EFi head, most of the MFi stuff is not looked after and harder to maintain etc... So for this reason an EFi head IMO would have less corrosion and over all a better run head in terms of Fueling.....

10-15 year old MFi head that has been turbocharged running higher than std boost. Compared with a NA head running EFi for the same amount of time...... I know what i would rather have.

Change the valves in the XR2i, EFi escort head, etc.. with ERST exhaust valves and your well away.

As for Porting wise the EFi head is deffo better!!!

But! If you already have a ported, polished worked MFi head.. whats the point of changing it for a EFi one that either has to be worked agian at a small cost or you dont want to replace your head gasket bolts etc. for cost reason's or because you have a decent head gasket... + Loads of other reasons not to change heads!

You can fit a converter plate on the head between the manifold which can be done in minutes


Just IMO always open to sugestions tho

Regards
Jano

 

Thanks, but I said he was in the know

 

This may be a stupid stupid question, but what exactly corrodes in an Aluminium head?

Its my understanding that an oxide layer will form on the surface, but other than that I wasnt aware aluminium did corrode?

 

aluminium does corode but its not visable as it just dulls and becomes pourous after time

how are xr2i zorst valves different to erst valves ( not talking about the shitty sodium filled S1 valves)

never new they was different and if they are would the vavle guides then wear out quicker

 

Instead of taking what someone else says as gospel and then telling us about it, why not come to your own conclusion.......

Do you examine enough MFi & EFi heads to be able to tho?

 

I have done, yes.

Do you?

 

The head I'm talking about is a Fiesta Frenzy head done 400 miles - get it or leave it?

 

James, there is no problems with fitting an EFI head to an MFI engine.
The only problems are the inlet manifolds.

In my opinion the EFI head is better.
I agree with what Jano is saying, generally they are in better condition and are more tunable as they have more meat around the ports before you break into the water ways.

Buy the head, but get the overall thickness checked out, and its "flatness"

Matt.

P.S. also worth putting a cam in and checking it spins nice and smoothly as a warped head can missalign the cam bearings on these heads.

 

Why? What's wrong with your car?

 

The head is restrictive and the cam is VERY old and tired, time to move on

Anyone heard anything good or bad about Fiesta Frenzy