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jbeenz
 Post subject: Whats my 998?
PostPosted: Tue Jan 23, 2007 2:05 pm 
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Location: New Zealand (whangarei)
Whats my motor?
99h791p 424785

its a late 998 (UK) i think, it has the camxxxx head, with solid rockers etc,
but it also has a 1/2 inch lobe'd camshaft, and the simplex chain is missing its tensioner, there is very little sign of wear, and no evidance that its ever been apart, should a 998 have this cam?
discussion welcomed :P

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Wombat
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PostPosted: Tue Jan 23, 2007 2:24 pm 
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Location: Sunny Shine Coast, Qld Australia
Mini 1000 1974 on with dished pistons

Edit: source http://www.miniresource.com/engine.php

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Last edited by Wombat on Tue Jan 23, 2007 2:43 pm, edited 1 time in total.

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jbeenz
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PostPosted: Tue Jan 23, 2007 2:36 pm 
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that sounds right, what denotes 74 on?

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drmini in aust
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PostPosted: Tue Jan 23, 2007 6:34 pm 
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jbeenz wrote:
that sounds right, what denotes 74 on?

the 791
later ones 77 on with smog head were 99H/AJH something. :wink:

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jbeenz
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PostPosted: Tue Jan 23, 2007 7:25 pm 
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hmmmm ok, we never got the smog head here, but its got the unleaded head.

oh dear, to confuse this further, its got an a+ gearbox, with a 3.4 diff.

this is the second similar engine i have pulled down in the last year :?

and whats with this cam, its slot drive, with 2 rings, does the a+ 998 block have ribs?

also the actual engine number seems high.

i dont mean to sound like ive found anything amazing, its just a confusing stock 998

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Wombat
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PostPosted: Tue Jan 23, 2007 10:45 pm 
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You can identify your cam from Vizards book - How wide are the cam lobes?

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KLAS
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PostPosted: Wed Jan 24, 2007 1:35 am 
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does the cam have 2 rised rings between lobe 3 and 4?

and vizards book does not cover all A+ cams

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jbeenz
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PostPosted: Wed Jan 24, 2007 4:52 am 
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yes, 2 rings between 3 and 4, 1/2 inch lobes...
hmmm, i really should buy visards book. :)

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KLAS
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PostPosted: Wed Jan 24, 2007 5:23 am 
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than it should be the normal low compression, 8.3:1, 998ccm A+ cam
Timing: (Intake): 5/45 (Exhaust): 40/10
Duration (Intake): 230 (Exhaust): 230

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jbeenz
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PostPosted: Wed Jan 24, 2007 5:29 am 
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nice and mild then :lol:
thanks for the info! its getting a fresh-up and a nice 202 head, out of interest, what are the specs of a stock pre a+, spider-drive 1275 cam?

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KLAS
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PostPosted: Wed Jan 24, 2007 6:56 pm 
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i don´t know what a "stock pre a+, spider-drive 1275 cam" is.
what engine? or name of the cam?

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jbeenz
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PostPosted: Wed Jan 24, 2007 7:00 pm 
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just the austin/morris 1300 (ado16) cam, its actually a NZ 1275gt cam, which is an a+ block, crank, rods, pistons, with an a-series head and cam :roll:

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KLAS
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PostPosted: Wed Jan 24, 2007 7:47 pm 
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not sure but could be this one:
Timing: (Intake): 5/45 (Exhaust): 51/21
Duration (Intake): 230 (Exhaust): 252

if it is this one, it should be timed in at 106° ATDC and not 110° the manual says

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