Ausmini
It is currently Thu Mar 28, 2024 8:53 pm

All times are UTC + 10 hours




Post new topic Reply to topic  [ 13 posts ] 
Author Message
 Post subject: max RPM
PostPosted: Mon Sep 19, 2016 9:47 pm 
Offline
848cc
848cc

Joined: Fri Jul 08, 2016 10:24 pm
Posts: 383
Location: Cherrybrook NSW
Can anyone tell me what the max RPM in general should be for a 1275 seems like a mild cam standard head bored to 1310 should be

I engine seems to be happy to rev and 6000 RPM doesn't seem to be an issue.


what did they rev to out of the box?

_________________
1968 Morris Mini Cooper S


Top
 Profile  
 
 Post subject: Re: max RPM
PostPosted: Mon Sep 19, 2016 9:52 pm 
Offline
1275cc
1275cc
User avatar

Joined: Fri May 02, 2008 3:07 pm
Posts: 5068
Location: The Internet
I used to rev my Cooper S to 35mph in first, 56mph in second and 77mph in third. Just as the speedo says.
No idea what rpms but. No tacho


Top
 Profile  
 
 Post subject: Re: max RPM
PostPosted: Mon Sep 19, 2016 10:00 pm 
Offline
848cc
848cc

Joined: Fri Jul 08, 2016 10:24 pm
Posts: 383
Location: Cherrybrook NSW
gtogreen1969 wrote:
I used to rev my Cooper S to 35mph in first, 56mph in second and 77mph in third. Just as the speedo says.
No idea what rpms but. No tacho


I have the opposite problem MPH is not accurate and I have a smiths RPM gauge so it's closer to accurate

_________________
1968 Morris Mini Cooper S


Top
 Profile  
 
 Post subject: Re: max RPM
PostPosted: Mon Sep 19, 2016 10:04 pm 
Offline
1275cc
1275cc
User avatar

Joined: Fri May 02, 2008 3:07 pm
Posts: 5068
Location: The Internet
My last mini was a worked 1330 with Cooper S internals and it went to 6500rpm easily but ran out of grunt if you took it to 7000rpm.


Top
 Profile  
 
 Post subject: Re: max RPM
PostPosted: Mon Sep 19, 2016 10:15 pm 
Offline
848cc
848cc

Joined: Fri Jul 08, 2016 10:24 pm
Posts: 383
Location: Cherrybrook NSW
cool I have the RPM limiter set to 6500 so I might have it about right

_________________
1968 Morris Mini Cooper S


Top
 Profile  
 
 Post subject: Re: max RPM
PostPosted: Mon Sep 19, 2016 10:55 pm 
Offline
religious status
religious status
User avatar

Joined: Fri Mar 19, 2004 6:19 pm
Posts: 39621
Location: near Baulkham Hills, NSW
HP peak was at 5,800rpm, so 6500 is OK. HP is diving by 7000.

_________________
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:


Top
 Profile  
 
 Post subject: Re: max RPM
PostPosted: Mon Sep 19, 2016 11:03 pm 
Offline
1360cc
1360cc
User avatar

Joined: Wed Oct 03, 2007 9:04 pm
Posts: 6648
Location: Melbourne, VIC
viewtopic.php?f=2&t=91129

_________________
ex-NSW Police 1970 MK II Cooper S
VMCI #43


Top
 Profile  
 
 Post subject: Re: max RPM
PostPosted: Mon Sep 19, 2016 11:17 pm 
Offline
998cc
998cc

Joined: Sat Jun 21, 2008 12:43 pm
Posts: 828
Location: Narellan NSW
My motor is a near stock mk1 1275
30th over bore and an old 266 cam grind
it made max torque at 5000 and max horse power at 6000
I have my red line set at 5500 for day to day driving
not that I don't take it to 6500 or more every now and again :shock:


Top
 Profile  
 
 Post subject: Re: max RPM
PostPosted: Tue Sep 20, 2016 6:40 am 
Offline
848cc
848cc

Joined: Fri Jul 08, 2016 10:24 pm
Posts: 383
Location: Cherrybrook NSW
Thanks, i'll have to get mine on a Dyno and set it correctly but his has provided me with a good round about number

_________________
1968 Morris Mini Cooper S


Top
 Profile  
 
 Post subject: Re: max RPM
PostPosted: Tue Sep 20, 2016 7:08 am 
Offline
1360cc
1360cc
User avatar

Joined: Sun Apr 11, 2004 11:32 am
Posts: 12390
Location: Sthrn HiLoLands, NSW, Australia
oldblade wrote:
Thanks, i'll have to get mine on a Dyno and set it correctly but his has provided me with a good round about number


I wouldn't be using six and half grand on a round about... :arrow:

(better to be near peak torque...)

_________________
"Show me the Mini!"


Top
 Profile  
 
 Post subject: Re: max RPM
PostPosted: Tue Sep 20, 2016 7:32 am 
Offline
848cc
848cc

Joined: Fri Jul 08, 2016 10:24 pm
Posts: 383
Location: Cherrybrook NSW
It's just used for the Rev limiter on my dizzy

Sent from my Nexus 6P using Tapatalk

_________________
1968 Morris Mini Cooper S


Top
 Profile  
 
 Post subject: Re: max RPM
PostPosted: Tue Sep 20, 2016 7:39 am 
Offline
religious status
religious status
User avatar

Joined: Fri Mar 19, 2004 6:19 pm
Posts: 39621
Location: near Baulkham Hills, NSW
oldblade wrote:
It's just used for the Rev limiter on my dizzy

Sent from my Nexus 6P using Tapatalk

My black box rev limiter is set at 7500, because my HP peaks at 7000 or so. Not that I go there often... :wink:

_________________
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:


Top
 Profile  
 
 Post subject: Re: max RPM
PostPosted: Tue Sep 20, 2016 4:38 pm 
Offline
848cc
848cc

Joined: Fri Jul 08, 2016 10:24 pm
Posts: 383
Location: Cherrybrook NSW
Just had a play with my black box hmmmm and now set the max rpm to 6500 I checked and had it at 6000 by accident also made a couple of other changes. Think I found a few Horses



Sent from my Nexus 6P using Tapatalk

_________________
1968 Morris Mini Cooper S


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 13 posts ] 

All times are UTC + 10 hours


Who is online

Users browsing this forum: No registered users and 18 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Jump to:  

© 2016 Ausmini. All garage work involves equal measures of enthusiasm, ingenuity and a fair degree of irresponsibility.