Waterjackets machining

[Jeffer]

I've searched the forum for some more info on this, but there is very little to be found. The cilinderhead thats currenty in the sq rep is an overhauled 3b head. Works well, but is about to be modified. The priority is getting the car on the road, after that building an exotic head and slapping that on, with the BIG turbo. bigger Valves, different cams, inconel valves, porting the works....... But i also want to machine the water jackets to enhance the cooling. Are the people that have done this open to share their experiences? Here's a picture of what i'm getting at.

http://mulk.planet.ee/galerii/Plokikaane%20veekanalid/index.php?showimage=Plokikaane%20veekanalid%20ja%20asjad%20002.jpg&screenwidth=1920

[SteveH]

Jeffer, speak to Aelred

[JP]

Any decent machine shop with a cnc mill can do it. Give them a headgasket so they can dial in the radii go for a 3.5-4mm ball nose cutter and off you go, get them to flick across the deck afterwards and it's instantly deburred for you.

All you are doing is connecting the waterways to allow deck cooling to aid against detonation. Like below (3mm groove shown)

[Jeffer]

Did you manage to do some comparison before and after?

[repo]

Water jackets usually allow 3-6 degrees more ignition advance on load. Best effect for four degrees more advance, I've seen so far was 250hp at 8500 rpm range, so yes, it has effect, but worth of nothing, if not mapped accordingly.

Also, +600hp daily divers tend to have pressure leak to water system in the long run, on high load that is. After water jacketing, they resist those problems MUCH better.

I've been using those for almost 10 years now. I have also consulted Andres (Mulk), with his setup.

E: If You need the jackets to be done, contact Steve Esslemoth from Goodwill Garage, Solihull, near Birmingham. A CNC shop will charge an arm and a leg if You go there without patterns. Steve has special tools for that.