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Home > Help Needed / General Tech Chat > 1275 with a 12G295 head

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1137 Posts
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Post Whore

Near Paris - France

3rd Jan, 2008 at 11:22:06pm

I have been reading about the superior exhaust of a 12G295 and since I happen to own and untouched one, was askink myself if this would be a good way to drop CR on a 1275 assuming I fit it with the 1275 small valves (having a 1275 small valves anyway)

This way, it would involve much less grinding to get a low CR and that famous superior exhaust !

And I can save my 1275 head if I go back NA since this is France and modyfying cars is taking serious risks

What about it ?

Cheers;

Régis

Rusty by nature

On 23rd Jun, 2008 paul wiginton said:
They said "That sounds rough mate." I said "Cheers it cost me a fortune to make it sound like that!"


joeybaby83

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6274 Posts
Member #: 509
Post Whore

Isle of Man

3rd Jan, 2008 at 11:27:18pm

its not possible to use a small bore head on a large bore motor im afraid.

"Turbo's make torque, and torque makes fun"

"did you know you can toast potato waffles?"



wil_h

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Post Whore

Betwix Harrogate and York

4th Jan, 2008 at 08:00:49am

Jo's right I'm afraid, you'll just fill your cylinders with water.

It might be possible if you dry-decked the whole lot, but all the extra work woule defeat the object of using it as a simple solution.

Fastest 998 mini in the world? 13.05 1/4 mile 106mph



On 2nd Jan, 2013 fastcarl said:
the design shows a distinct lack of imagination,
talk about starting off with a clean sheet of paper, then not bothering to fucking draw on it,lol

On 20th Apr, 2012 Paul S said:
I'm mainly concerned about swirl in the runners caused by the tangential entry.


AlexF2003

5795 Posts
Member #: 80
AFRacing LTD

Newbury, Berks

4th Jan, 2008 at 03:04:40pm

If its a good 12g295 its worth Euros... so sell it and but a good 12g940 *happy*

AlexF

Jay#2

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2500 Posts
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Northern Ireland (ex AUS)

4th Jan, 2008 at 04:17:09pm

Especially if it's "untouched".

On 7th Nov, 2008 Nic said:
naeJ
m
!!!!!!sdrawkcab si gnihtyreve ?droabyekym ot deneppah sah tahw ayhwdd


danboy

715 Posts
Member #: 1381
Post Whore

Doncaster, South Yorkshire

4th Jan, 2008 at 04:42:13pm

And is a worked exhaust port on a 295 better than the same on a 940 or just better than a worked exhaust on any other small bore head?
Regards
Dave

Vegard

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I pick holes in everything..

Chief ancient post excavator

Norway

4th Jan, 2008 at 04:48:02pm

I think the last. However, the valve guide boss on the 940 is HUGE compared to the 295. Difficult to say really. A port with a modified valve guide boss in a 940 would anyway flow WAY better than a 295.

On 13th Jul, 2012 Ben H said:
Mine gets in the way a bit, but only when it is up. If it is down it does not cause a problem.
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