dg225

i have a fiesta zetec turbo which is running megasquirt v3, ive just checked the timming at idle and its 30 degrees advanced, does any one know what it should be set at, cheers.

RS 5tu

iTrader: (2)

what cams have you got?

xr2wishy

iTrader: (2)

sounds like the timing is way too advanced, i think my zvh on ms2v3.0 is around 18 degrees on idle.

dg225

engine spec (let pistons so i was told by seller) but i think there xe pistons, head skim 13 thou and block skim 7 thou (maybe over skimmed i dont know?) standard cams, adjustable pullys set at 0 degrees, uprated valve springs, stg3 t3 running aprox 10 psi focus rs headgasket and spark plugs..

jonny s2

iTrader: (12)

could the compression ratio be too high,just a thought

Antti O

Pinking at idle or what?
I have idle advance something like 18 now. Get your car someone who can map it.

Rick

that's too much

dg225

problem is theres no tunning people near where i am, its pinking under hard acceleration, timming is 30 degrees advanced at warm idle...

Karlos G

iTrader: (4)

Just my advice but to be safe take 10 degrees out of the whole table until you can get it setup somewhere, and/or turn the boost right down!

xr2wishy

iTrader: (2)

on warm up mine can hit 24-25 degrees, as i have a 6 degree advance when cold, which tapers off pretty quickly as it warms up.

Rick

where are you?

crazycage

not at his computer lol

dg225

im in the channel islands, thats why its diffult to find a tuner, does any one know if theres and megasquirt tuners down south? also does and one know what the cr will be with my spec engine, xe pistons(they were meant to be let ones but im now told there not) head skim 13 thou, block skim 7 thou with focus rs headgasket?

Rick

do you know how to load and save a map to your ECU?

JesseT

A 16V engine really does not require much advance.
Use the table generator to get in the ball park. 30 degrees is really way too much advance for idle.

dg225

ive just ordered a rs232 to usb cable ( i think thats the one lol) to connect ecu to laptop, so im gana try and set it up, the pervoius owner had maped the car to run 9.1 cr which was a standard Zetec with a 1 mm decomp plate, and one mondeo head gasket, and it ran fine till the bottom end went, so i then rebuilt the engine with the spec listed adove and now its pinking under hard acceleration..

does and one know what cr my engine is? head skim 13 thou, block 7 thou skim, focus rs headgasket and xe pistons, any help would be great, would it be more or less compression than pervious, which was 9.1 cr, standard zetec with 1mm decomp plate and mondeo headgasket, cheers...

xr2wishy

iTrader: (2)

i can only guess, but xe peistons usually make around 8.4:1 cr, maybe a little more given the block being decked and head skimmed a little.
if anything on the same map as before, you chould be getting less det, but of course the fuelling will be way off now, so running lean probably.
before doing anything else, get a wideband setup and get the mapping sorted.

RS 5tu

iTrader: (2)

Is it a blacktop or silvertop?

dg225

its a silver top engine, im going to get it set up on the laptop and see whats what, its strange how it was fine, and since rebuild its pinking/detonating at onlt 10 psi...? maybe the compression is higher now..?

dg225

just worked out the CR 9.44:1 it was mapped to 9.1:1 that is probley the cause. of the pinking.. does anyone know if these head gaskets are any good http://www.pumaspeed.co.uk/showdetails.php?id=470 im thinking of using the thicker head gasket to lower the comperssion...

DazC

iTrader: (1)

a thicker head gasket won't drop it much but it's worth a try. Did you use a burrette to measure cylinder and combustion chamber volumes and work the ratio out from that?