TOPIC:

well come on over and help work on this slowly progressing project and ill take ya for a boat ride,if that dont scare ya we'll drag the ol 1428 out of its hiding place to see if we can make it run again!

oopsies!picture wont fit!

Post edited by: wireman, at: 2006/08/24 20:57

Extrude Hone looks good and is something I've been wondering about for a while (why heads aren't ported abrasively I mean). We normally pay £500 ($900) for a ported head so $430 is relatively cheap.

The motor I am getting is an 83-84 , I have heard of cracking problems with double-plugged heads. Anyone have any experience of this?

And if you want scary fast, you need to see our other project....

You might want to have your assistant open that door before you launch...

i wonder if the cracking problem isnt more on the nitro/top fuel style heads.APE sells a billet head for that situation.

Lorcan wrote:

Extrude Hone looks good and is something I've been wondering about for a while (why heads aren't ported abrasively I mean). We normally pay £500 ($900) for a ported head so $430 is relatively cheap.

The motor I am getting is an 83-84 , I have heard of cracking problems with double-plugged heads. Anyone have any experience of this?

And if you want scary fast, you need to see our other project....

extrude honing process has been around many years my only question is how to remove material in areas you want without removing in other areas?i suppose it would be good for exhuast manifolds or something that needs uniform amount of material removed all around.

this is second hand info but on the drag bike forum they show pics of welded/bridged gpz heads to keep down cracking,they mostly are for the nitrous pro mods tho.

from what I could tell from the pics they welded a 1/2" bar of aluminum or mabe a plate from one cam gally to the other one in 4 places along the head attaching all the fins touching the bridge in the process.

wireman wrote:

i wonder if the cracking problem isnt more on the nitro/top fuel style heads.APE sells a billet head for that situation.