Hey guys,

Just wanting some help with where to go with the title above. I have the twin 40's they came off a xr2 mk2 fiesta. I know I need the manifold but can anyone tell me what else needs done? Jetting, management etc? They have all the throttle linkages but will they have to be changed for zetec as they came from xr2? Also anywhere in Scotland (central as im in falkirk area) that would be the best place to go to let them deal with it? Thanks in advance guys

 

You need to sort the ignition side of things, as otherwise a total waste of time, ignition needs to be adjustable for best benefit.
I don't know anyone around your area though.
tabetha

 

how do you sort the adjustable ignition out? I havent been down this route so am completely in dark

 

The best way to sort it out is with a ignition only ecu.
In the old days, no doubt before you were born and I was still really old!!, cars had distributors, so you couyld adjust the weights/stops and springs inside these to modify the curve for the ignition.
Nowadays it is all done with the ecu, when it is mapped, you may be able to leave your ecu powering just the ignition side of things, but it will be very flat as the fuelling will have altered drastically the curve is not likely to give you the full goods power wise, 40's or any carb is a backward step, by all means got to seperate tb's, but fuelling on efi will always be better, if just wanting the noise individual throttle bodies(tb's) will give this just the same as carbs but will all the advantages of efi, but if your ecu is limited in it's adjustability from a mapping point of view then it isn't worth it, unless a new 3 d ecu was fitted, this is the only way to get 100% benefit from tb's and or ignition.
Ignition curves are often overlooked but are at least as important as the fuelling.
tabetha

 

yeah I was born in 87 haha I own an rs turbo that has the distributor right? im not after noise im after the full potential of the 40's, just wanting a little power boost without going the turbo route but thinking of going that way as this sounds like it going to be complicated? what kind of ecu should I be looking for to get the potential outa the 40's? id prefer this route as it a little different from my turbo and got the 40's for nout car already has a few mods aswell which I think the 40's will benefit the engine for, or will a just forget the 40's idea? had a mate witha 2 litre with r1 carbs and it shifted that why I have been looking down this route

 

Up to you which route you go and why, but ask yourself what power you want, will you want to keep modding/adding to the car/engine/power, if so forget 40's.
It's a no brainer for me it would be EFI anyday of the week, but I also like carbs, and had plenty tuned cars with carbs.
The adjustability of a decent ecu is breathtaking compared with a carb.
If you want just ignition only ecu just shop around, but some are nearly as expensive as full 3d(fuel and ignition).
You don't need to go the turbo route for more power, but if you think you might end up there anyway work towards that goal, a 3d ecu is a good start, could always use it just in ignition only mode in the meantime.
I prefer and use Emerald K3, junked my L6, best thing I ever did, but mine was mapped by emerald the same people who designed it built it and mapped it, so they do kn ow it well!!
That said there are many other ecu's that will also do a perefectly good job if mapped correctly.
There are some truly shocking people around so choose carefully, mine was set up on L6 by someone running 334bhp@24 psi, according to his rollers, and 280 odd torque, was fast but f**k did it drink.
Later on emeralds rollers the truth revealed 280bhp 270 torque at 24 psi and 11.1 AFR, nearly so rich as off the scale.
It now runs 300bhp 297 torque on 17.5 psi, and up to 40 mpg on a run, runs like a dream and with 180,000+ on the clock.
I took opposite lock and his mate for a drive yesterday, just ask them, think they were impressed for a car with that mileage!!
tabetha

 

i have 40s on my zetec

get a megajolt ecu, this is for ignition only, and can be bought second hand for £100,

you can download maps off the net and load them on until you get it mapped, unless it runs well on a map off the internet you might not need it mapped.

you can use the same throttle linkage, just get a zetec manifold and bolt them together

youll need to sort the jets out in the 40's though, but people on here can tell you what jets to use till you get them jetted right

could have them bolted to your zetec and running for under £200, its the mapping and jetting that costs money

 

tabetha- i fancy the carb route as ive never been down this road. as I said I have an rs turbo its 190 bhp good fun but didnt want to go the same way for my zetec. I know you can get a fair deal of power out a zetec turbo but I was just after a quick hot hatch a suppose. my mate had an xr2 zetec with r1 carbs and it gave my turbo a run for its money I was shocked, thats what made me think of the 40s. as blk above has said a megajolt? anyone else have any experience with these? ive seen it on ebay for under 200 which I think is not too bad? that includes edis module IF I need it? if not can get it cheaper I take my rs to AVA in glasgow never had any problems so may talk to them about my new idea and what they can do for me. Must say uve been a great help yet again mate always appreciated!!

blk-mk5- thanks for info mate! how does it run? what other mods have you got? wat size is your zetec? ive had a look at megajolt on ebay brand new costs 170 without edis and 180 with so dunno if I need the edis module? also what length is your manifold as I see you can get a variety of diff lengths to fit. this is for a fiesta so prob better with the shortest available. thanks for replyin

again guys im completely blind to this so how I go about the jetting? is it a rolling road adjustment or do you need to buy different jets and have them put in? Im enjoying this learning curve something new to everything else I no about the damn fords from replacing and fixin haha been round the rest now am back to the best and lovin it

 

it runs well, quite thirst but pulls well

i have a 2.0 zetec with fast road cams, 4 branch manifold and bigger system than standard, i have mine in a mk2 xr2 and the manifold is not the shortest and i had trouble with the trumpets, had to fit the smallest i could find, you need the really sort manifold really, keep them away from your bulkhead

youll need the edis module to save you makin up your own loom, just cut the pip and saw connectors going to your cps and take them to the megajolt instead

go onto the autosport website its all about megajolt, tells you how to wire it up (think thats the website, just google it)

 

hi again mate,

what kinda power you reckon? and would u say it worth the effort? and not a problem I will order myself up a kit with edis module, and thanks for the link mate should be alot of help on my adventure haha

 

i think mines makin about 160bhp at the wheels, 45's would probably be best but i had mine set up on a rolling road and re-jetted

the megajolt only needs, live earth pip saw and rev counter if you want it and itll run

quite easy when you get your head around it

 

no problem thanks again for the info uve gave me a gd idea of what im after & doing now CHEERS

 

hi has any body got a map for 1.8 sliver top with 2ltr cams, tuned head (big values and ported), running on twin 40's, 4 brancher, lighted flywheel ,removed pas and a/c. if any can tell here to get the map or send me a link to get one. thanks lads