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PostPosted: Fri Aug 17, 2012 6:57 pm 
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1275cc
1275cc

Joined: Thu Dec 09, 2004 6:57 am
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Location: JIMBOOMBA QLD.
What would a 1275 engine bored +.030" (1303cc). 9.0:1 Compression, with a slightly ported head, 731 Cam , Std rockers, Maniflow extractors and 1 3/4 " exhaust, HIF 44. Produce at the wheels on average?

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PostPosted: Fri Aug 17, 2012 7:16 pm 
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Location: near Baulkham Hills, NSW
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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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PostPosted: Fri Aug 17, 2012 7:23 pm 
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998cc
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Do you read Mini World etc??? They frequently run "dyno days" that report on outputs etc...

Cheers, Ian


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PostPosted: Fri Aug 17, 2012 7:34 pm 
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Depends a lot on the dyno, the drive-on ones are all different.
Good for pub points comparo on the day, but hard to compare to others, or even the same dyno at a later date.

Lots of variables. We found 8HP in a race Mini by swapping the sticky rubber for hard crappy road tyres.

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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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PostPosted: Sat Aug 18, 2012 8:35 pm 
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1098cc
1098cc

Joined: Tue Aug 24, 2004 3:57 pm
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Location: queensland
drmini in aust wrote:
Depends a lot on the dyno, the drive-on ones are all different.
Good for pub points comparo on the day, but hard to compare to others, or even the same dyno at a later date.

Lots of variables. We found 8HP in a race Mini by swapping the sticky rubber for hard crappy road tyres.


Did it go faster with the new found horses?

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PostPosted: Sat Aug 18, 2012 9:03 pm 
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low'n blown wrote:
drmini in aust wrote:
Depends a lot on the dyno, the drive-on ones are all different.
Good for pub points comparo on the day, but hard to compare to others, or even the same dyno at a later date.

Lots of variables. We found 8HP in a race Mini by swapping the sticky rubber for hard crappy road tyres.


Did it go faster with the new found horses?

Might have, until the 1st corner... :lol:
Like I said ^^ good only for pub points. Or engine tuning.

On the other hand, a `water brake' engine dyno has few variables, and is far more sensitive to minor tuning changes. So better for engine development.

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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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