Jay,

iTrader: (4)

why does number 3 piston melt on a cossie people have that the old pinto on carbs did it to so why is it can you stop it without dampining performance or it the cossies achelies heel so can someone explain why it happens

cheers jay

Anonymous

Its just a water distribution problem as far as i know, doenst happen if you have a decent quality water pump from what ive seen.

Sure one of the tuners can give more details though?

Mike Rainbird

iTrader: (3)

On Cossies it is mainly due to the design of the inlet manifold supplying more air to the middle two cylinders than the outer two with no.3 getting the most. This means it is always the first to go lean and melt in normal circumstances. There are ways round it, the expensive way is to use an ECU with individual cylinder trim capabilities. The cheap way is have the injectors flow tested and put the best one of the four onto No.3 cylinder.

Jim Green

MMMike...... Did exactly that.... Injectors flow tested, and strongest flowing one is on number 3 cylinder. Thought I was so clever when i did that.....

Anonymous

Ah, fair enough mike, makes sense given the standard inlet design, i guess the issue wiht the water pumps cause a general rise in temp and its because of the leaness that its then 3 tht dies?

Weird thing is though, ive seen a N/A cossie die on the same cylinder, which obviously has nothing to do with the manifold, but maybe that was just co-inceidence

Jay,

iTrader: (4)

yeh chip this was my concern that n/a does it to although sayin that im goin the way mike said sequentail injection in hope of stopping it but i wanted to know why coz its just a strange thing

jay

Mike Rainbird

iTrader: (3)

I did say "in the main" . For high revving engines it is recommended that the water ways are modified, as the water pump runs at a 1.3:1 ratio on a Cosworth and at high rpm the water flow can bypass some of the waterways preferring to take the most direct route (again the middle two cylinders suffer).

I "believe" the mods enlarge the water ways to slow the water down and this cures the issue completely (my car has had this done).

Jay,

iTrader: (4)

so mike sory to appear thick but on normal power or up to 400bhp would the fuel uprade be ok then anymore power the waterways mod helps reliability

jay

Mike Rainbird

iTrader: (3)

If you're having the block machined for long studs, then you might as well pay the extra for the water-way mods .

Belt and braces job...