Z22SE help needed after Cat Cams - Electric water pump install with other mods

#1
davies craig ewp115 water pump
Cat cams (ultra fast) 259° 10.75mm (4603113 sport)
Balance shaft chain removed
Z22YH pistons & rods 12 compression pistons
Port & polish head head
Dblias intake & exhaust
Cobra exhaust
Lightened & balanced flywheel
Sport clutch​
also has LPG installed and gearbox has been reconditioned (F23)​
full rebuild rings and the lot​

having a hard time with mapping on the standard ECU with this one, it needs a remap right away but after a dyno (120bhp) its doing 50bhp less then what it was doing before (170bhp), is this normal? Is there anyone that can help me with this, also i need a good setup for the coolant pipes for the electric water pump as it seems to be having problems with the heater core and lpg unit getting airlocked, it always seems to get bubbles back in. I've got standard coolant pipes on with booster pump on the heater matrix/lpg and water pump fitted right after the radiator.

cheers guys
 

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#4
My car has just jumped timing on the chain, and if there isn't much damage I'm going to rebuild it. Is there any advise you can give me vocky on the rebuild which we make it more reliable and help with the mods I got? The heads got to come off and get a new chain, any extra head work I could do to make it better aswell?

Cheers
 
#6
are the cams vernier'd with saab sprockets or standard z22se sprockets ?

I have a pair of adjustable cam sprockets available if needed.
Also can I have them adjustable sprockets please, think I may need them. From the mods you've seen how much brake you think it'll do?
 
#7
I
Hey just curious whats involved in fitting the electric water pump? Hard to do?? Is it easier to do than balance shaft delete?
We just taken the bottom chain out and left everything where it was apart from guides and bolts then smashed the plastic propeller out of the original pump then smooth it down as much as I could. Fitted the pump at the bottom of the radiator, was easy really apart from leaks here and there till we sorted them out. But I'm going to have to install new radiator pipes as it pumps into the expansion tank aswell as the thermostat. If it gets a rebuild I'll take photos
 

patricks

Regular Member
#8
I


We just taken the bottom chain out and left everything where it was apart from guides and bolts then smashed the plastic propeller out of the original pump then smooth it down as much as I could. Fitted the pump at the bottom of the radiator, was easy really apart from leaks here and there till we sorted them out. But I'm going to have to install new radiator pipes as it pumps into the expansion tank aswell as the thermostat. If it gets a rebuild I'll take photos
Thanks yeah pics would be great.
 
#9
I have some used valves if any are bent, but check the valve guides are not cracked. Without pulling the head it's not really possible to tell if they are bent. Normally just the inlets go, if you are lucky only one pair will need changing, depends on the rpm of failure.
Change the chains and see if it runs okay, if not you need to pull the head off.
 
#10
no compression in any of the cylinders, low ticking noise (valves hitting) and back fire in the air filter. Jumped timing at around 70mph/3000rpm on motorway, so looks like head off job hoping for little damage. May as well do full cylinder head again like last time, any other mods i could do to the head if I'm taking it in for work? And how much for the sprockets vocky ?
 
#11
you might as well open up the exhaust ports whilst the head is apart, just use a dremel or similar. Use the exhaust gasket to show you how much to remove.

At that rpm it's probably best to replace the lot, I can do you the full set of 16 valves for £20 inc postage
 
#12
Should be taking the head off this week to check for the full damage, hoping these z22yh pistons don't have to much height for the high lift cams. How much for valves and the sprockets? vocky can I ask aswell how much power can these z22yh pistons and conrods take? They look alot stronger then the z22se ones vocky
 
#20
Most likely caused by the roller rockers having zero clearance to the valve spring retainers

modify the roller rockers like this;

roller rockers.jpg


make the bottom flat, so remove the curves shown by the red arrow on the left, the right version has been modified

The other option is to use the cast B207 roller rockers
 
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