Board logo

has anyone ported there own head DIY
jpindy3 - 19/5/09 at 11:06 AM

I got a really good book on it,and was thinking of giving it a go.
anyone done this???

omega0684 - 19/5/09 at 11:09 AM

dude check out my pinto rebuild thread in the 'engine and transmission' section, look at part 4: Porting

here

Alex

JAG - 19/5/09 at 11:12 AM

Yep I had a go.

I can't say that it definitely made a difference but it hasn't spoilt anything and I learnt a lot about my engine and head whilst I was in there

I have some photo's in my Archive of the head before, during and after. Some shots showing the valve shrouding on the MX-5 engine, some showing the bare head, shots down the ports and the final head chamber volume measuring set-up I used.

I picked-up 3 Tungsten carbide burrs on Ebay for about a fiver and used these in my electric drill. They certainly chewed through the aluminium of the ports - you have to be very carefull

ETA: the pictures are in the 'General Stuff' folder.

[Edited on 19/5/09 by JAG]

Dangle_kt - 19/5/09 at 11:13 AM

yup, but it was a motorcycle engine.

Its pretty easy as long as you have the right tool for the job, and repeat over and over as you work, "I can take more off, but I can't stick it back on"

Just make sure you understand where the valve guides etc are, so as not to compromise the reliabilty of the engine.

Triton - 19/5/09 at 11:14 AM

Good few years ago yeah, ported a Mini head using Vizards wicked book of making the A series go a wee a bit quicker..

MikeRJ - 19/5/09 at 11:23 AM

Me and my brother did some porting on an A Series head with a 100Watt Minicraft drill (well before Dremels etc. became available and popular). Used the David Vizard bible as per Triton, and the engine went very well.

BenB - 19/5/09 at 11:36 AM

quote:
Originally posted by jpindy3
I got a really good book on it,and was thinking of giving it a go.
anyone done this???


I thought about it but I couldn't get the dremel past the ear wax.

tegwin - 19/5/09 at 11:37 AM

There is an article somewhere.... someone used water and a sheet of glass to volume balance the combustion chambers in the head..... Amazingly simple!......

Using a titration tube to measure the volume of each chamber and removing material to balance them!

mad4x4 - 19/5/09 at 11:41 AM

Is that not called Trepanation
Linky

[Edited on 19/505/09 by mad4x4]

JAG - 19/5/09 at 12:38 PM

quote:

someone used water and a sheet of glass to volume balance the combustion chambers in the head


Yes, that's what I did. Water with a little anti-freeze to colour it.

[img][/img]

flak monkey - 19/5/09 at 01:32 PM

Yep, the best book is How to powertune Ford pinto SOHC engines by Des Hamill. Very clear and good advice