Skip to content
View in the app

A better way to browse. Learn more.

rollaclub.com

A full-screen app on your home screen with push notifications, badges and more.

To install this app on iOS and iPadOS
  1. Tap the Share icon in Safari
  2. Scroll the menu and tap Add to Home Screen.
  3. Tap Add in the top-right corner.
To install this app on Android
  1. Tap the 3-dot menu (⋮) in the top-right corner of the browser.
  2. Tap Add to Home screen or Install app.
  3. Confirm by tapping Install.

Ported Heads

Featured Replies

How many people have ported the k heads

With there rebuilds

Here is photos off my head ported

post-22613-0-25352900-1469017499_thumb.jpg

post-22613-0-15403000-1469017587_thumb.jpg

post-22613-0-40895300-1469017804_thumb.jpg

Nice work.

 

I am currently rebuilding mine for track use, using a ported 3k head. Has been ported to approx 33mm inlets

 

How much compression are you looking at running?

Edited by Had_ke30

  • Author

The inlet ports on my head are 35mm

This head is goin on a 5k with flat tops

It will have 10.2.1 comp

  • Author

Cost me $450 to get ported

Only got to get new valve guides fitted and seats cut and new valves and then faced so be about $1000 when finished

 

Have a read of Thomas thread ! I ported the head for him , to get the most out of your port job make sure you put bigger valves in and cam to suit as well as carburation / exhaust and the list goes on ???? . Thomas head has double valve springs at around 105 pound on the seat which once warmed up should be around 95/100 on the seat , compression ratio is just under 12-1

Valve size I can't remember. I bought the head already built and then sunk a heap of more money into it. Will chase emails and measure for you. I remember they were at least 1mm o/s

sorry late to this little chat..... I've done a little "K" engine port work..... very early on.

 

 

 

anyone test their work on a flowbench?? unfortunately my bench was not available when I did my K porting....

Edited by oldeskewltoy

The inlet ports on my head are 35mm

This head is goin on a 5k with flat tops

It will have 10.2.1 comp

 

Is the 35mm inlet diameter at the entrance or all the way through?

Please sign in to comment

You will be able to leave a comment after signing in

Sign In Now

Account

Navigation

Search

Search

Configure browser push notifications

Chrome (Android)
  1. Tap the lock icon next to the address bar.
  2. Tap Permissions → Notifications.
  3. Adjust your preference.
Chrome (Desktop)
  1. Click the padlock icon in the address bar.
  2. Select Site settings.
  3. Find Notifications and adjust your preference.