fiestaturbo.com

[doubley_m]

Hi, i need to make a decision. Im going to fit an RST engine into my 1.6 fiesta Si and have already bought an ERST engine complete with everything apart from a loom and gearbox. For the last few days I have been looking around for fiesta RST parts because i thought it best to convert the engine to the fiesta EFI system but after much searching was told i would need the whole fiesta RS engine because there is a CPS sensor on the block that only exists on the FRST engines so i am trying to work out what to do. I know if i keep the ERST engine that the loom will need to be wired in to the interior fiesta loom and i need an FRST intercooler and rad but what are the actual advantages of using an FRST engine? are there serious performance limitations to the ERST engine? are they harder to tune? I suppose I could fit the ERST engine and then when i get some more money swap it over for a FRST one. So are there any real tuning limitations to the ERST engine? Cheers for any advice guys. Matt.

[xr2itrojan]

i think it might be a bit cheaper to have a erst engine tuned but the benefit of a frst engine is the "chatter" you get from not using a dump valve. think i read somewhere that some late escort engines had the hole for the cps sensor. if i was you i would just sell the engine and buy a frst item. keep the t3 though.

[doubley_m]

Thing is i don't really want to have to try and sell this engine then find an FRST one, if the only advantage is some wastegate chatter then i can live with the ERST engine, at least for a little while, until i have the money to buy an FRST lump. Does this sound wise?

[Captain Tightpants]

ERST lump is easier and cheaper to tune.

Fact is though, MFi, in this case KE-JETRONIC. Is nutsack, it needs to be set up realistically every three to six months. Or run the risk of damaging your engine.

EFi has so many benefits. It's a fully mappable system, controlling fuel and ignition. There is loads of information about EEC-IV on this site, do a search for more info.

All the EFi heads are the same, including the cam AFAIK. A few ERST's did come with a CPS hole, but they were at the end of the production line, and it's unlikely you have one.

It's possible to splice the KE loom from an ERST, but let me tell you, its a pain in the ass. For the work thats involved, you had just as well use EFi stuff.

A FRST intercooler and Rad would be your best course of action.

Steve

[xr2itrojan]

yeh what he said

[doubley_m]

Thats pretty lame but i have my eyes set on using the ERST engine at least for the time being until i can get things sorted and drop in a FRST lump. so I am just wondering if anyone else out there has wired the ERST loom into the fiesta interior one because this seems to be the only hurdle i would need to face. I assume I could get the required wiring diagrams from the fiesta and escort haynes manuals? i already have the fiesta one aswell. I am not really bothered about the frequency of set ups required because I am not planning on keeping that engine for an excessive amount of time. Thanks for the help!

[xr2itrojan]

ages ago when i had my 2i (64k beast) i was offered an erst engine cheap and was considering doing this conversion apart from the loom i reckon it wudnt be too hard but i never found out what to do about fueling as in which pump and fuel lines to use. if you have access to a fiesta and escort haynes manual they have all the electrical diagrams in.

[AndyBlackFRST]

The FRST also has an oil cooler mounted on the rear of the block between the block and oil filter...

[wally1979]

You can use erst block but u have to drill the hole for the cps and holder some blocks have a mark on the casting for it the head is diffrent aswell