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| Home > Help Needed / General Tech Chat > Cylinder head/valve help | |||||||
 319 Posts Member #: 1742 Senior Member essex |
23rd Mar, 2012 at 08:51:01pm
Hiya i am collecting parts for my project and am planning on using a 12g940 head to turbo. I know that the original turbo head had sodium filled exhaust valves but i think the inlets were standard. the head im going to use has standard inlets and exhaust do you guys recommend i change the exhaust valves for some decent EN214n spec valves (or similar) or should i change the lot. Thanks for your time james My small bore turbo project http://www.turbominis.co.uk/forums/index.php?p=vt&tid=473901 |
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 9812 Posts Member #: 332 Resident Cylinder Head Modifier Mitsi Evo 7, 911, Cossie. & all the chavs ...... won no problem |
23rd Mar, 2012 at 09:16:45pm
These sodium filled valves are not needed, you would be better off getting a fully modded head with combusion chambers reshaped with 26 to 28 ccs in there to lower the compression ratio, so you can run alot more boost,
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319 Posts Member #: 1742 Senior Member essex |
23rd Mar, 2012 at 09:27:30pm
Cheers for the reply. Im on a tight budget (as always lol) and i do like to port my own heads. i will be opening it up as required de shroud the valves a little and wast back around the inlet guide but just flow around the exhaust guide for heat transfer. will i get away with just changing the exhaust valves to a higher grade or will the inlets suffer too. Cheers james My small bore turbo project http://www.turbominis.co.uk/forums/index.php?p=vt&tid=473901 |
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 4636 Posts Member #: 20 My sister is so fit I won't show anyone her picture Lake District |
23rd Mar, 2012 at 10:15:07pm
Standard road spec inlets will be fine. I'd stick the stainless exhausts running in bronze guides in there for good measure though.
Edited by Turbo Phil on 23rd Mar, 2012. |
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3006 Posts Member #: 2500 Post Whore Buckinghamshire |
24th Mar, 2012 at 05:15:13pm
He means Stellite I think. |
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4636 Posts Member #: 20 My sister is so fit I won't show anyone her picture Lake District |
24th Mar, 2012 at 06:40:39pm
I know ! Lol |
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2497 Posts Member #: 1954 Post Whore Luton Bedfordshire |
24th Mar, 2012 at 09:13:20pm
If you can find a MG Metro head and change the exhaust valves only. Your only smudge of a mill smaller for max safe valve size if memory serves. If your on a budget it's worth thinking about. Own the day
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9812 Posts Member #: 332 Resident Cylinder Head Modifier Mitsi Evo 7, 911, Cossie. & all the chavs ...... won no problem |
25th Mar, 2012 at 02:16:34am
Phillips don't be silly its this bloddy predictive textttttttt. ...........lmaoooooo
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