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cush
 Post subject: Power Tuning the 1275
PostPosted: Fri Apr 28, 2006 1:59 pm 
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This can include the 970 and 1070 big bore boys if you like.

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Lillee
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PostPosted: Fri Apr 28, 2006 2:07 pm 
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Cush, it's the same for all engines, not just mini engines.

More air + more fuel = more power

Make it breath better in and out, provide adequate fuel to match that air flow, make internal components lighter so it spins easier.

For A series it's even more all the same. Head work, bigger carb, better intake, better exhaust.

ANSWER: READ YOUR VIZARD BOOK! 8)

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cush
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PostPosted: Fri Apr 28, 2006 2:34 pm 
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ruiner... :)

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Lillee
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PostPosted: Fri Apr 28, 2006 5:02 pm 
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Who me? No 8)

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h0nk
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PostPosted: Fri Apr 28, 2006 7:54 pm 
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Excellent info, very useful. This should be a sticky.
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gafmo
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PostPosted: Fri Apr 28, 2006 8:42 pm 
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But thier are others that have some secret's that they will not devolge :wink:

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Spaceboy
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PostPosted: Sat Apr 29, 2006 1:58 am 
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i believe the best way to modify a BIG BLOCK 1275 would be to STROKE IT and keep the revs down with a MEATY cam and balance the hell out of it, as 1275's are ROUGH
keep the heavy flywheel to lay big blackies
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drmini in aust
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PostPosted: Sat Apr 29, 2006 8:21 am 
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Spaceboy wrote:
i believe the best way to modify a BIG BLOCK 1275 would be to STROKE IT and keep the revs down with a MEATY cam and balance the hell out of it, as 1275's are ROUGH
keep the heavy flywheel to lay big blackies

Speak for yourself, my 1360 with S crank & rods is dead smooth from 3K-8K... :lol:
Only the big journal 1100S ones with those bloody heavy rods are rough, IMO. :wink:

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Lillee
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PostPosted: Sat Apr 29, 2006 11:48 am 
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Best way is to make everything as light as possible so that it spins freely from standstill to 7000+ rpm. Make sure it breaths effortlessly and deeply, increase the compression ratio and way you go :wink:

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drmini in aust
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PostPosted: Sat Apr 29, 2006 12:08 pm 
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68Delux wrote:
Best way is to make everything as light as possible so that it spins freely from standstill to 7000+ rpm. Make sure it breaths effortlessly and deeply, increase the compression ratio and way you go :wink:

No need to lighten much on a small journal roady motor- I just used the stock Cooper S crank and rods, all balanced though. :wink:

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R. :mrgreen:
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1360 LS
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PostPosted: Tue May 02, 2006 8:16 am 
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drmini in aust wrote:
Spaceboy wrote:
i believe the best way to modify a BIG BLOCK 1275 would be to STROKE IT and keep the revs down with a MEATY cam and balance the hell out of it, as 1275's are ROUGH
keep the heavy flywheel to lay big blackies

Speak for yourself, my 1360 with S crank & rods is dead smooth from 3K-8K... :lol:
Only the big journal 1100S ones with those bloody heavy rods are rough, IMO. :wink:



I've a 1360 with S rods crank etc... mine only revs to 5- 5.5 ... mind you no headwork or cam work . should my car be able to be revved higherr or its that the best . Dont wnat a race car as its a daily.
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Lillee
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PostPosted: Tue May 02, 2006 8:44 am 
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Hello 1360 LS, do you have a green LS? I see a green LS in the mornings sometimes driving through Five dock...

If you have a stock head and cam there may be no more power above 6000 anyway

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Spaceboy
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PostPosted: Tue May 02, 2006 8:47 am 
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the tacho redlines at 5.5k so thats normal.
with modifications, they will see crazy revs, but yeah totally unneccesary for a daily driver.
the stock cam is probably the best for traffic use as i find most fast road cams only start delivering power around 3000 rpm, and thats when you should be changing gear.
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Mini Mad
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PostPosted: Tue May 02, 2006 3:16 pm 
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Spaceboy wrote:
i find most fast road cams only start delivering power around 3000 rpm, and thats when you should be changing gear.


3000rpm? Who says? :lol:

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1360 LS
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PostPosted: Wed May 03, 2006 7:12 am 
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68Delux wrote:
Hello 1360 LS, do you have a green LS? I see a green LS in the mornings sometimes driving through Five dock...

If you have a stock head and cam there may be no more power above 6000 anyway


there's a green one around my area???? can't say i seen it. I have a Hi ho Silver LS number plate KAE 883 . I told there original plates too. keep a eye for me in the next couple of weeks coz thats all I have my licence for. Losing it as soon as I get a RTA notice.


only green Mini I seen around my area is a solid panel van.
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