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Re: A12 Cross Flow Head
No life (a.k.a. DattoMaster)
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2002/10/28 6:49
From Melbored
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how much more improvement are you hoping for vs a non crossflow race setup?

From the view of the mini head, the chamber and valve angles are not ideal for
the exhaust as they were angled that way for non crossflow ports.


Med heads for example uses larger offset rollers.....

http://www.turbominis.co.uk/forums/index.php?p=vt&tid=339188

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Quote:
A-series experts MED Engineering are developing a new cast alloy cylinder head for the Mini, and here is an exclusive photo direct from MED. Lee from MED explains that "the photo shows the fully modified head with 6mm stem valves, titanium retainers and lash caps fitted. The rocker arms themselves we have special made with a larger offset on the rollers to accommodate the offset valves in the head.



For example Fontanas New Gen engine is still based off the chevy 4 and does well

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Quote:
Fontana’s premier product, the New Generation midget engine, based on the GM four cylinder, is the result of 25 years of on-going development. It meets the expressed needs of today’s racer. Reliability, drivability, a wide, smooth power band, lightweight, best left side weight in the industry, and most importantly, an engine that can win any race – a Championship engine!


Id say the gains for just going crossflow with no hemi chambers like the E15 is an expensive and not hp increasing exercise except better packaging for boosted apps and looks great!

Mini as you know also has the bmw head kit which is superior in every way to 8v crossflow heads
packaging is the same issue as carbs hit the mini bonnets in either ohv or ohc layouts.
The BMW head looks factory and fits nicely even in mini hoods when boosted.
http://www.dep-o.co.uk/features/ultimate-a-series/

The Mazda Miata head conversion is possible as you know but water and oil galleries need
massaging, later heads have better angled ports and improvements the compatible to the
A series heads dont. Maybe a Miata head in billet with better ports like on the ZC head
would make an A series an easy 200hp engine that revs with no pushrods clunking around.
There would be a Japanese market to consider as they like bolt on kits that offer more
than whats already been tried.

Posted on: Today 0:47
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Re: HAVE YOU GOT A DIFF FOR ME ??
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Hi Bob, Swap for a 3.7:1?
dp

Posted on: Yesterday 21:58
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'79 B120 (TURBO EFI A15 + 60 ser.5spd )
'83 Clubman 7 with worked A15 + 63A 5spd
'73 1200 Coupe Mild A15 5spd lsd

keep it simple
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Re: Wow, Datsun1200 turbo
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Well dome Simo!

Sucks about the engine failure but I'm sure you will be back bigger and better

Posted on: Yesterday 21:42
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1976 120Y 2DOOR SEDAN Z18 TURBO

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http://ozdat.com/forum/viewtopic.php?f=60&t=9796
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B210 GX mirrors
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Hi All does anyone have fitting instructions/measurements for b210 gx fender mirrors? Or would the 110 measurements on wiki be the same?

I cant find them anywhere

Cheers

Posted on: Yesterday 21:37
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1976 120Y 2DOOR SEDAN Z18 TURBO

Check out my 120y 2door sedan here :)

http://ozdat.com/forum/viewtopic.php?f=60&t=9796
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Re: HAVE YOU GOT A DIFF FOR ME ??
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Sorry Simon .
I do not have a 4.4

Posted on: Yesterday 21:08
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Re: A12 Cross Flow Head
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Here is a picture of establishing the 12° valve angle.

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Posted on: Yesterday 20:25
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Re: HAVE YOU GOT A DIFF FOR ME ??
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Hi Bob, Swap for a 4.4:1?

Posted on: Yesterday 12:54
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Re: Wow, Datsun1200 turbo
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Thanks Guys,

Here is the in car footage of the first heat.

https://www.youtube.com/watch?v=E5UA8qezANI

A wild ride! It is from Pole Position and drives away, so no other cars in the footage apart from a couple of lapped cars at the end.

Posted on: Yesterday 12:23

Edited by sikyne on 2018/11/15 12:39:37
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Re: Fuel pump questions for classic rally car
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Use a Facet low-pressure electric pump

L24 and L18 fuel pumps are the same, just do a fuel flow test

Posted on: Yesterday 7:55
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Re: A12 Cross Flow Head
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Right now I’m working at where to place the exhaust ports. I want to be able to use factory items like the rocker arm assembly instead, but the passages for the push rods are challenging me currently.

I can guarantee nothing on the market will fit the port pattern....Sorry...

So far...

Posted on: Yesterday 6:36
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