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PostPosted: Mon Aug 20, 2018 10:46 pm 
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848cc
848cc

Joined: Sat Mar 01, 2014 2:29 pm
Posts: 179
Location: Maryborough, Qld
I've partially striped my 1100 for my mini and found that the head has had a little bit of work done to it. Does anyone know if grinding down the peaks between the valves will increase the flow of the head in any significant way? I've measured the valves and they are still standard size for a 202 head.

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PostPosted: Tue Aug 21, 2018 7:41 am 
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998cc
998cc

Joined: Mon Mar 10, 2014 11:38 am
Posts: 1054
Location: Tassie
It would de-shroud the valve a little. I suggest having a read through GR's small bore articles on his website. They will help your understanding.

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PostPosted: Tue Aug 21, 2018 7:57 am 
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848cc
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Joined: Fri Jul 21, 2017 1:14 pm
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Location: Branxton, NSW
Here’s what I did with mine, no tested yet but looks like it’ll be nice.


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PostPosted: Tue Aug 21, 2018 12:54 pm 
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Yay For Hay!
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Joined: Wed Sep 08, 2004 9:27 pm
Posts: 15167
Location: Wodonga - Vic/NSW border
hpal wrote:
Here’s what I did with mine, no tested yet but looks like it’ll be nice.


you can go a *lot* further than that - you should read GR's article too

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PostPosted: Mon Dec 24, 2018 4:58 pm 
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848cc
848cc

Joined: Fri Oct 06, 2017 6:39 pm
Posts: 68
Location: Perth, WA
Was just watching this last night...

viewtopic.php?f=5&t=97974

Also, is this the GR article???

http://russellengineering.com.au/perfor ... der-heads/
http://russellengineering.com.au/projec ... -bore-pt2/


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PostPosted: Mon Dec 24, 2018 8:26 pm 
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1098cc
1098cc

Joined: Tue Jun 12, 2007 2:07 pm
Posts: 1848
Location: Lemmings, everywhere.
Read David Vizards books. They are full of accurate, useful and reliable information on everything you need to know about cylinder head modification.

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PostPosted: Tue Dec 25, 2018 7:06 pm 
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848cc
848cc

Joined: Wed Jul 02, 2014 11:38 am
Posts: 446
Books are good


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PostPosted: Tue Dec 25, 2018 7:30 pm 
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1275cc
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Joined: Fri May 02, 2008 3:07 pm
Posts: 3869
Location: Bundy
Can't go past GR. Best mini engine builder.

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PostPosted: Wed Dec 26, 2018 8:02 am 
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1098cc
1098cc

Joined: Sat Jul 23, 2011 8:17 am
Posts: 1959
Location: san remo nsw
Ian_B wrote:
Books are good


what's a book? :wink:


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PostPosted: Wed Dec 26, 2018 9:24 am 
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1360cc
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Joined: Sun Apr 11, 2004 11:32 am
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Location: Sthrn HiLoLands, NSW, Australia
I grew up reading and learning from books...great for getting your posture right when placed on your head whilst strutting about...or for holding doors open...etc etc

I read in one, that when remodelling combustion chambers by removing metal, that you are lowering the compression ratio so you need to skim head or block or use different pistons to compensate (or, after measuring and calculating your new CR, to just live with it! :shock: )

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Last edited by 9YaTaH on Mon Dec 31, 2018 5:09 pm, edited 1 time in total.

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PostPosted: Wed Dec 26, 2018 5:53 pm 
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848cc
848cc

Joined: Wed Jul 02, 2014 11:38 am
Posts: 446
When I learnt music (drumming) I was taught to read . Its not needed to play but it is essential to pass things on and learn .The credibility of the book writers is unquestioned when they hide nothing.


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PostPosted: Wed Dec 26, 2018 5:57 pm 
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1098cc
1098cc

Joined: Mon Nov 06, 2006 8:54 pm
Posts: 1535
Location: Hunter NSW
Ian_B wrote:
When I learnt music (drumming) I was taught to read . Its not needed to play but it is essential to pass things on and learn .The credibility of the book writers is unquestioned when they hide nothing.

The yellow bible says it all


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PostPosted: Mon Dec 31, 2018 5:02 pm 
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848cc
848cc

Joined: Sun Apr 17, 2016 9:33 pm
Posts: 38
Location: Melburn
850man wrote:
Read David Vizards books. They are full of accurate, useful and reliable information on everything you need to know about cylinder head modification.

What he said :roll:


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PostPosted: Mon Dec 31, 2018 5:52 pm 
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848cc
848cc

Joined: Wed Jul 02, 2014 11:38 am
Posts: 446
Cam pro plus measures cams where you dont know what you got Every cam I got from Watson Jones Waggot came with a card .You knew tappet clearances timing The lot.Measurements of a modern grind ive seen was not modern at all.


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PostPosted: Tue Jan 01, 2019 7:19 pm 
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848cc
848cc

Joined: Wed Jul 02, 2014 11:38 am
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If you dont want to have a go on your own ala Vizard take it to GR


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