ausmini :: View topic - Power Tuning the 1275

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

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:

Spaceboy wrote:

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 find most fast road cams only start delivering power around 3000 rpm, and thats when you should be changing gear.

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

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

Author:	Lillee [ 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!

Author:	cush [ Fri Apr 28, 2006 2:34 pm ]
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ruiner...

Author:	Lillee [ Fri Apr 28, 2006 5:02 pm ]
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Who me? No

Author:	h0nk [ Fri Apr 28, 2006 7:54 pm ]
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Excellent info, very useful. This should be a sticky.

ausmini https://www.ausmini.com/forums/

Power Tuning the 1275 https://www.ausmini.com/forums/viewtopic.php?f=5&t=18604	Page 1 of 3

Author:	gafmo [ 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

Author:	Spaceboy [ 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

Author:	drmini in aust [ 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... Only the big journal 1100S ones with those bloody heavy rods are rough, IMO.

Author:	Lillee [ 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

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

Author:	1360 LS [ 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... Only the big journal 1100S ones with those bloody heavy rods are rough, IMO. 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.

Author:	Lillee [ 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

Author:	Spaceboy [ 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.

Author:	Mini Mad [ 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?

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Author:	1360 LS [ 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.