whats the safest boost to run on a zetec turbo with a decomp plate? (t3 or t34 turbo) on ofab!

cheers

 

i hear 8-10 psi max, but dont take my word for it m8

 

aye my mate ran 7 psi on his t3 fiesta 2.0 turbo for months and it was nippy, then run it at 11 psi on beiges and went alot better! wonder if a 2.0 zt would like 1 bar on a t34 standard bottom end lol

 

well the powerworks supercharger kit takes the standard 2l black top to around 240bhp so i would imagine thats a fairly safe limit. play around with more if you want but just be aware it may go pop but then if the engine is stadard then its cheap to replace.

 

yep well s3 zetecs are only Ł100-200 complete so cheap to sort, i wonder whats the most power and torque someones had out of the zetec standard bottom end

 

the crank an rods are good for circa 400bhp from what im told but this could ofcourse be bull shit

 

rods aren't good for 400 sustained. Max power on a stock engine (no decomp only cams) is over 500 but it wouldn't be nice to drive and it was done for a laugh

 

didn't think the rods were upto that sort of power but the crank is.

i think above that sort of power and above standard rpm limit you start getting oil pump failure which seems to be the only major problem on these engines and more so on silver tops from what i've read on here.

when i've got the cash i'm going to tubo my mk1 2l zetec focus so i may have a play with how much power it will make before going bang

 

any more info and links on that claimed 500??

sounds like a good laugh

 

250 would be fine, would be like my old c20let phase2 belmont, that i guessed was 270 but others thought it was 280+

 

300+ degree cams and massive turbo in a mondeo in malta or somewhere like that. Think it managed a couple of passes and then killed it self

 

mate was running ofab, beiges, cossie turbo @16psi, managed 2000 miles then melted piston 3 racing a cossie, be better off with aftermarket managment, should be able to run a reliable 250-280 then

 

that sounds a good laugh. haha

 

cossie turbo being t34 or t3 mate? im sure if it had fiat coupe injectors it might of lasted longer?

 

was a 4x4 t3 mate, thing is your running 1.6 managment in a 2.0, my mates old 1.9cvh frst ran mustang bosch dark blues, cant remember the code but they made no real diffenrence, will still only give what the 1.6 ecu is mapped for, there no lamda sensing or real way of adjusting the fule mixture properlly with frst managment

 

I had my ofab live mapped by ahmed bajoo at grove garage, so it can be mapped correctly ?

 

well there is that option too lol

 

thats what id do, ian howell/bayjoo map

 

The problem with using OFAB/OFAC is that it's designed for a 1.6 with a much lower VE than the Zetec. I know at least one car that has been fine on stock injectors/map, but it was never det/fuel checked. MSD and Ahmed are the only people who currently offer custom mapping for OFAB/OFAC AFAIK

 

Ł250 for the chips aint they? iv read 300bhp is possible on ofab?

 

we ran 14 psi in a old s2 on a t3 was very quick and was for 4 years then sold it and i hear its still going strong! oh and frst 196chip ofab it ran nice and smooth

 

How much do Ahmed and MSD charge for mapping the OFAC/OFAB etc?
Will injectors larger than beiges work with the standard 195chip on OFAC?

 

bttt would like to know ^^^ also

 

Lots, circa Ł500 IIRC! OFAC cannot be live mapped only OFAB.
No they wont as the 195 chip is programmed only for beiges... You run smaller it will be lean, you run larger it will be rich.

 

ahmeds Ł300

 

Thats very reasonable for a live map, I'm suprised!

 

I know of a Zetec turbo with low comp pistons running OFAB without a chip at all. Fuel pressure was adjusted and checked just using a set of det cans.

Runs 23 psi and is quick. And before people suggest it will blow up soon (as I did!) it's been running like that for 2 years and has done around 10,000 miles like that!

 

There is probably more to it than you know mate, the ECU would pull the timing right back and boost cut as soon as it went over stock boost without being chipped for starters.

 

Even with a stage 1 chip, mine boost cuts at anything over 12psi, so it must be chipped or mapped for the ofab to allow 23psi - the only option is a bleed valve bleeding off boost from the map sensor, which would spell big probs!

Its good to know the ofac/ofab can be live mapped!
Crumpet - is that a full live map?

 

nope custom chip suited to your spec

 

Aaah so it's not a live map for Ł300 then is it!
There is a big difference between a live map and a chip, the fueling will be rich, the timing will be retarded and as a result you will be down on power and not as economical or responsive as you could be.

 

Back to the original topic...

I'm sure he's on here, but there's a guy with a Mondeo MK1, fitted with a 2.0 black top engine on a decomp plate running circa. 270bhp.

 

but can all be setup on rollers pal!

are silver tops stronger than blacktops?

 

All you can do on the rollers is tweak the base fuel pressure (if needed) and boost, thats it.
I believe the black tops are what most people recommend, not got any direct experience myself though.

 

drivers engine mount is an issue though isnt it? going in an orion/mk2 fiesta

 

Just one bolt hole needs adjusting on the mount, much like fitting a silver top.

 

so black top and silver the same mounts? a bloke from devil dev said the silver top is alot easier to fit while the blacktop is a mission!

cheers!

 

Do a search in this forum about silver and black.was a big topic about it.

 

I would say from experiance turbocharging lots of standard engines (including silver top zetecs and variations based on that engine) that it is very much down to the tune as to how much boost you can run. Simply put you can destroy an engine on low boost if the tune is wrong. But pysically the strength of the pistons is the limiting factor, the ring land breaks on them with too much boost (ive had this) this occured with me at around 17 psi, on a 2 litre, but ive ran a 1.8 at almost as much boost with no problems.
To sum it up i would suggest 12 psi with a good tune will last indefinatly, but upto 15 psi can be ran with a good tune if you have a fair bit of mechanical sympathy and are not expecting to drive to the moon and back. Any more boost than this will last, but for how long depends on many factors, driving style, tune, intercooling and many more things. I would stronly suggest aftermarket managment with any turbo conversion of this nature.

 

Not the same, no. But if you're fitting a Zetec into a MK3/4 Escort, you have to modify one of the engine mount bolt hole locations anyway, so if you're fitting a black top instead, you'll just have to modify it slightly differently as far as I'm aware.

Then you need to sort out the auxillary belt run, as the water pump spins the other way, but there is a kit to do that, depending on whether you want PAS or not.