Group a homologation questions
05-11-2015, 09:31 PM (This post was last modified: 05-11-2015 09:32 PM by ditn.)
Post: #1
Group a homologation questions
So im checking the Group a homologation papers for the ae86 2 door and im wondering,
there is almost nothing in there that can be done to do the engine.
Am im missing something or??
that cant be right for an ae86 grp a car rallycar
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05-12-2015, 01:52 AM
Post: #2
Group a homologation questions
I have the full set of homologation papers, I'll have a look at mine. Maybe there are some differences.
Can you tell me the homologation number that you have ?

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05-12-2015, 09:38 PM
Post: #3
Group a homologation questions
A-5179 and n-5179 for grp a and grp n 2 door is mine.
i think its same.
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05-13-2015, 06:04 PM (This post was last modified: 05-13-2015 11:59 PM by oldeskewltoy.)
Post: #4
Group a homologation questions
from the A-5180 papers.... 3 door/hatchback

1599cc max
minimum rod mass - 431 grams - length 122mm - big end diameter 43mm (so no 42mm cranks!)
minimum crank mass - 11540 grams
flywheel cast iron minimum mass - 7060 grams
55mm T/B
injectors in head (not in intake)
maximum valve lift - 7.2mm - clearances .2mm, and .25mm
number of intake manifold elements - 2 (TVIS plate and intake??)
exhaust cast iron
max intake valve diameter 30.7mm, 6mm stem
max exhaust diameter 25.7mm, 6mm stem
wet sump oil system

As I read it... that leaves a LOT of room for special machining, and head porting. It also has cam lift listed... but not durations.... no mention of compression ratios either.... no mention of adjustable cam pulleys either....

Dan -

You can |Sad .... OR you can ask for help!!!

OST Porting service - http://hachiroku.net/forums/showthread.php?t=19991
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05-16-2015, 02:46 PM
Post: #5
Group a homologation questions
Some more engine info. here:
http://forums.toymods.org.au/index.php?t...3&start=0&

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05-17-2015, 05:22 PM
Post: #6
Group a homologation questions
thanks for info Smile
its really weird some say if its not in papers it has to be oem and other say if its not in papers its free.
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06-01-2015, 09:15 PM
Post: #7
Group a homologation questions
someone from organisation came and he said everything thats not in the papers has to standard.
Kinda sucks,im going group n then
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06-01-2015, 09:37 PM
Post: #8
Group a homologation questions
But isn't group n even more stict?

Daily Beater: Civic EG5
Work in progress Car: AE86
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06-01-2015, 10:48 PM (This post was last modified: 06-01-2015 10:57 PM by ditn.)
Post: #9
Group a homologation questions
Yes its is,
But the truth is in group a with basicly a stock engine there is no way you can compete.
However in group n its a very competitive car
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06-02-2015, 11:05 AM
Post: #10
Group a homologation questions
Go group E1 Smile
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