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Location:
Tasmania
Registered:
May 2002
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Re: What is a 'Group A' 4AGE ?
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Sun, 11 December 2005 00:07
 
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From the book, AE86 group A race:(in Japan)
original bigport 4A-GE, stock intake manifold
170ps@7600rpm
16.9kg-m@6800rpm
1.1 mm head gasket
11.8 compression 33.0cc
mild porting deburing of the chamber (diagram shown)
exhaust ported to ~31mm diameter at the manifold
intake ported to ~30mm diameter oval at manifold
11mm valve guides
Valves, ~ IN 30mm, EX 24.7mm
3 angle valve seat grind
forged or cast pistons
balance con-rods, within 2 grams
balance crank and flywheel within 10g-cm
***CAM SPECS***
intake: 304 degrees duration, timed at 100 degrees
exhaust: 290 degrees duration, timed at 100 degrees
valve lift 7.5mm
valve springs, 20kg loaded (std 15.8kg)
engine oil cooler
improved radiator
fuel pump up to 250cc/min (std 182cc/min)
2 liter surge tank
It then lists strait cut gear ratios, 200mm clutch, diff ratios, LSD, diff oil cooler, suspension and some interia parts.
Generaly speaking I think group A cars maintained stock suspension mounting points and very little external modifications (no flares). Cars in this class currently in Japan has been called N1 now. It seams similar to our improved production class only tighter rules on engine (stock intake manifold and EFI).
[Updated on: Sun, 11 December 2005 00:44]
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| | Subject | Poster | Date |
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What is a 'Group A' 4AGE ?
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nick.parker | Fri, 09 December 2005 05:36 |
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Re: What is a 'Group A' 4AGE ?
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Corona RT142 | Fri, 09 December 2005 05:41 |
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Re: What is a 'Group A' 4AGE ?
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nick.parker | Fri, 09 December 2005 06:10 |
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Re: What is a 'Group A' 4AGE ?
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Hunty | Fri, 09 December 2005 06:10 |
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Re: What is a 'Group A' 4AGE ?
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Corona RT142 | Fri, 09 December 2005 06:29 |
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Re: What is a 'Group A' 4AGE ?
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mrshin | Fri, 09 December 2005 06:10 |
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Re: What is a 'Group A' 4AGE ?
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domasik | Sat, 10 December 2005 09:22 |
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Re: What is a 'Group A' 4AGE ?
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Stretch | Fri, 09 December 2005 06:10 |
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Re: What is a 'Group A' 4AGE ?
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exquisit | Fri, 09 December 2005 21:20 |
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Re: What is a 'Group A' 4AGE ?
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shinybluesteel | Fri, 09 December 2005 21:58 |
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Re: What is a 'Group A' 4AGE ?
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mrshin | Fri, 09 December 2005 22:40 |
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Re: What is a 'Group A' 4AGE ?
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mrshin | Sat, 10 December 2005 10:34 |
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Re: What is a 'Group A' 4AGE ?
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Jonny2TG | Sat, 10 December 2005 23:33 |
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Re: What is a 'Group A' 4AGE ?
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Stretch | Sun, 11 December 2005 00:58 |
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Re: What is a 'Group A' 4AGE ?
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Jonny2TG | Sat, 10 December 2005 23:40 |
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Re: What is a 'Group A' 4AGE ?
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Jonny2TG | Sun, 11 December 2005 00:07 |
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Re: What is a 'Group A' 4AGE ?
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Jonny2TG | Sun, 11 December 2005 00:18 |
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Re: What is a 'Group A' 4AGE ?
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Jonny2TG | Sun, 11 December 2005 00:38 |
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Re: What is a 'Group A' 4AGE ?
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Jonny2TG | Sun, 11 December 2005 01:49 |
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Re: What is a 'Group A' 4AGE ?
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nick.parker | Mon, 12 December 2005 13:01 |
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Re: What is a 'Group A' 4AGE ?
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170bhp | Tue, 13 December 2005 00:23 |
