skulled busa heads

[lee8sec]

There must of been a call for them. Leigh
http://forums.dragbike.com/forum_posts.asp?TID=13325

[GRUNTMAX]

Ya wouldn't want to Turbo Charge that with all the room between the cylinder bores to "O" ring the head ???

[lee8sec]

"O" ringing shouldn't be a problem, bore center line is still the same, wont mater if its turbo or not. Alot of fuel bike motors run skulled heads. Leigh

[Legend]

There must of been a call for them. Leigh
http://forums.dragbike.com/forum_posts.asp?TID=13325

Hi Lee they run these heads on the turbo funny bikes and nitrous promods, to stop burning them up when they start pushing them.

Leonard.

[lee8sec]

Its good that enough guys are using them to allow for the tooling to do the skulls. Leigh

PS, you didnt run quicksilver today?

There must of been a call for them. Leigh
http://forums.dragbike.com/forum_posts.asp?TID=13325

Hi Lee they run these heads on the turbo funny bikes and nitrous promods, to stop burning them up when they start pushing them.

Leonard.

[Madmax]

Can I ask what a skulled head is please?

[lee8sec]

http://www.brianjohnson.co.uk/head_info.html
Have a read, it explains it. Leigh

[Camel]

Awesome. Makes me want to fire up the ol' Macson lathe and give it a go!

[Maj]

Wish i had a set for the landspeed 750, sick of replacing heads this season..methanol is very unforgiving when it finds a hot spot in the chamber

[Madmax]

http://www.brianjohnson.co.uk/head_info.html
Have a read, it explains it. Leigh

Thanks for the info.

[lee8sec]

No worries. I thought it would be better to read it from the guy's who have done them. Leigh

Can I ask what a skulled head is please?

http://www.brianjohnson.co.uk/head_info.html
Have a read, it explains it. Leigh

Thanks for the info.

[GRUNTMAX]

Thanks lee8sec.
Good info.
Cheers

[Legend]

Can I ask what a skulled head is please?

I have one here if you want to take a closer look!

Leonard.

[Madmax]

Can I ask what a skulled head is please?

I have one here if you want to take a closer look!

Leonard.

So do you skull a head that has port damage or as a pure performance mod?

I'd love to see one Lenard.

It looks like you spend an awesome amount of money on the head to achieve better flow?



Max

[Legend]

Can I ask what a skulled head is please?

I have one here if you want to take a closer look!

Leonard.

So do you skull a head that has port damage or as a pure performance mod?

I'd love to see one Lenard.

It looks like you spend an awesome amount of money on the head to achieve better flow?



Max

Most of the time they skull the heads when your chasing big hp 600+, as one small screw up, a lean out etc will melt the aluminum but the ampco material will handle it, thats why its used for valve guides etc.
Not a performance mod more a safety mod.

For example I wouldn't bother with it on my 600+hp turbo methonal busa as heads are readly avalible and all thats done to it is a port job.

On the other hand when you have a one off head on a 1200hp blown nitro motor then it could save you in the long run or be used to repair that head.

Head work can be quite expensive if you start chasing the last 1hp out of the combination (which they do in pro stock) but for a street or sportsman racer spending hours ($$$) on the flow bench to get another 2hp may not be worth it.

Next time your in Sydney, I give you a look at the head, some of the guys here have seen it, and will agree its a work of art!

Leonard.