undrcrown cooling jets
Turbo Mini Forums

to save me having to donate brain power to this subject , can you boys who have them fitted show me a picture where they go,exactly, i suspect off centre of the bore to steer clear of the con rod ,

cheers carl

WWW.FORCE-RACING.CO.UK PLEASE CLICK HERE

sounds interesting.
does it cost alot to buy these jets?
is it worth it?

cheers
josh

My build thread..

http://www.turbominis.co.uk/forums/index.php?p=vt&tid=542985

http://www.turbominis.co.uk/forums/index.php?p=vt&tid=5512

one ofthe questions on that link is are you worried about taking oil away from somwere were it is needed?
are you? proply not as you are still using them. right?

cheers
josh

My build thread..

http://www.turbominis.co.uk/forums/index.php?p=vt&tid=542985

If you crimp the ends and make them something like 0.8mm or 0.6mm like mine are, you'll see very little drop in oil pressure. It needs to be a "spray", it's not a jet hose ....

Phil.

WWW.TURBO-MINI.COM

so dave , i assume the holes are drilled freehand ,just aiming at the main gallery.
carl

WWW.FORCE-RACING.CO.UK PLEASE CLICK HERE

Yep - the first 8mm drill hole is done on a drill press / mill (preferably a mill so you can spot-face the area aswell) down about 10mm I recall?
And then you grab a 2/3mm drill and go through at a 15-degree angle or so into the main gallery.

Very easy for a man of your skills :)

so the one you show on jims block are the ones to order.?

WWW.FORCE-RACING.CO.UK PLEASE CLICK HERE

I'll send you a pm in a few mins matey...
Just going for a brew first :)

I'm thinking of doing this after all the problems we've had this year. Just a few questions.

- Why don't you drill 8mm straight into the gallery?

- is the jet sealed into the block other than it being a tight fit?

cheers

Fastest 998 mini in the world? 13.05 1/4 mile 106mph

I used a small amount of sealent on my jets to seal them.

an 8mm hole isn't drilled into the gallery as the gallery is not directly below the jet, hence the smaller hole is at a 15 degree ish angle

Team Racing

go them .
nearly £8.00 each from my local rip offf main dealer.
carl

WWW.FORCE-RACING.CO.UK PLEASE CLICK HERE

so with this mod do you notice any differnces in oil tempertures/pressure?
or is it somthing to do to keep your mind at rest?

My build thread..

http://www.turbominis.co.uk/forums/index.php?p=vt&tid=542985

If you're going to plagiarise, then make sure you plagiarise the best...

You'll find undercrown cooling jets in every decent turbocharged engine of recent times - and every single modern-generation turbo diesel.
It even features on numerous high-performance nat-asp engines like BMW, aswell as more mundane offerings from Ford with the zetec.

You'll still find peeps who say they're not needed, waste of time/money, etc... And they may well have a point.

I do know OEM's dont add cost to anything for no reason. So the reason for an oem fitting them are probably slightly better educated reasons than joe public saying they're unneccesary IMO.

But - you won't find them on MiniWilliams mini, John Flanigans or Tim Hanaby's - ie some of the most powerfull A-series' minis around. So sure - they seem to cope without them.

The descision is completely up to yourself.

Edited by turbodave16v on 14th Sep, 2006.

http://mini.lyons-it.co.uk/davecoxon/Ford_Zetec_Jet.jpg

Did you get these ones with the 'round' body or the squared body ones then Carl?

WWW.FORCE-RACING.CO.UK PLEASE CLICK HERE

Don't centre-punch it - it's way too thin under the top surface. Just position it then spot it with the Mig.

The 'nozzle' is VERY brittle as you've noticed. Heating is the only way you can move them effectivly.