R5 Alpine head modification

Competition engines and 'live' projects only. Good photos to illustrate your post are expected.
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Robert
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Joined: August 20th, 2006, 8:17 am
Location: France
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R5 Alpine head modification

Post by Robert »

Hello Guy,

Find attached pictures about a head of an Renault 5 Alpine. Is it possible you give me a a priori recommendation on the work to do on it to improve flow ? Of course you have no flowbench trials to validate your answer (humour)...
My suggestion is based on the reading of your different books, you can edit a picture and post it back to show where you should intervene...
It seems the SSR of the exhaust demands more work than intake.

Thank you very much,

Robert
Attachments
Bare head
Bare head
P1100784.JPG (87.88 KiB) Viewed 5172 times
Humble Suggestion of mods
Humble Suggestion of mods
P1100784RG1.JPG (84.93 KiB) Viewed 5172 times
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Guy Croft
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Re: R5 Alpine head modification

Post by Guy Croft »

You are not far off there, treat as I would the Fiat twin-cam, shape is very similar. Same goes for valve angles.

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Robert
Posts: 86
Joined: August 20th, 2006, 8:17 am
Location: France
Contact:

Re: R5 Alpine head modification

Post by Robert »

Thanks Guy. May be we will avoid to remove metal in the exhaust guide area.

Robert
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Guy Croft
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Joined: June 18th, 2006, 9:31 am
Location: Bedford, UK
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Re: R5 Alpine head modification

Post by Guy Croft »

Yes, you need to be careful on the outboard side of the ex valve guide boss - if you make it too thin it may shear when the guide is pressed in.


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Guy Croft, owner
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