mini bore out to a 1480 or change the block for a metro turo
27-05-2009, 11:14 AM
#2
You cant bore a mini block to 1480cc anyway realistically.
Do you mean 1380cc? (which is 73.5mm pistons)
Stroked 1380cc using an offset ground modern crank with cooper S rods will give 1430cc
If so, just boring and stroking it wont give you anymore power really, maybe a few bhp but no more than that, it will just drag the torque down the RPM range a bit, you will need a lot of headwork and a decent cam as a starting point for more power on an A Series, the standard head is shocking and the standard cam in a non MG model is poor too.
Turbo is the cheap way to get power, but you'll probably kill lots of gearboxes.
If you want a nippy car, a 90bhp A series works well, if you want a FAST car, ie 150bhp+ then throw the a series in the bin and fit a honda or vauxhall engine!
Do you mean 1380cc? (which is 73.5mm pistons)
Stroked 1380cc using an offset ground modern crank with cooper S rods will give 1430cc
If so, just boring and stroking it wont give you anymore power really, maybe a few bhp but no more than that, it will just drag the torque down the RPM range a bit, you will need a lot of headwork and a decent cam as a starting point for more power on an A Series, the standard head is shocking and the standard cam in a non MG model is poor too.
Turbo is the cheap way to get power, but you'll probably kill lots of gearboxes.
If you want a nippy car, a 90bhp A series works well, if you want a FAST car, ie 150bhp+ then throw the a series in the bin and fit a honda or vauxhall engine!
Last edited by Chip; 27-05-2009 at 11:15 AM.
27-05-2009, 11:23 AM
#3
trevs cossie what a tool
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You cant bore a mini block to 1480cc anyway realistically.
Do you mean 1380cc? (which is 73.5mm pistons)
Stroked 1380cc using an offset ground modern crank with cooper S rods will give 1430cc
If so, just boring and stroking it wont give you anymore power really, maybe a few bhp but no more than that, it will just drag the torque down the RPM range a bit, you will need a lot of headwork and a decent cam as a starting point for more power on an A Series, the standard head is shocking and the standard cam in a non MG model is poor too.
Turbo is the cheap way to get power, but you'll probably kill lots of gearboxes.
If you want a nippy car, a 90bhp A series works well, if you want a FAST car, ie 150bhp+ then throw the a series in the bin and fit a honda or vauxhall engine!
Do you mean 1380cc? (which is 73.5mm pistons)
Stroked 1380cc using an offset ground modern crank with cooper S rods will give 1430cc
If so, just boring and stroking it wont give you anymore power really, maybe a few bhp but no more than that, it will just drag the torque down the RPM range a bit, you will need a lot of headwork and a decent cam as a starting point for more power on an A Series, the standard head is shocking and the standard cam in a non MG model is poor too.
Turbo is the cheap way to get power, but you'll probably kill lots of gearboxes.
If you want a nippy car, a 90bhp A series works well, if you want a FAST car, ie 150bhp+ then throw the a series in the bin and fit a honda or vauxhall engine!
thank you will do my best
27-05-2009, 02:21 PM
#5
Happily retired
, had more than 100bhp in 1965 
with a Supercharger.
27-05-2009, 03:59 PM
#7
Exactly, 90bhp is cheap to get, and tends to be reliable, once you venture beyond that, if you drive it hard, you'll be forever spending money.
My trackday 'A' was over 100bhp, but I wouldnt have a big miles 'A' powered road car at the same level personally.
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27-05-2009, 04:09 PM
#9
Happily retired
27-05-2009, 04:10 PM
#10
Yeah, they've done a few, including a 5 speed, trouble is all the ones which are significantly stronger than standard are straight cut, and straight cut gears in a gearbox which is sharing its oil (and hence swarf) with the engine isnt a great plan for long term reliaiblity.
27-05-2009, 04:30 PM
#12
I think I probably had 4 when you joined which were:
998cc runabout
1380cc Cabrio
1380cc Trackday car
Vauxhall mini project
Ive still got the runabout and the vauxhall one, but they have both been in storage for years, should be cracking back on with the vauxhall one this winter hopefully if my new unit is built by then
998cc runabout
1380cc Cabrio
1380cc Trackday car
Vauxhall mini project
Ive still got the runabout and the vauxhall one, but they have both been in storage for years, should be cracking back on with the vauxhall one this winter hopefully if my new unit is built by then
04-08-2010, 08:09 AM
#14
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Ok, so this is n old post...... however anyone searching for this information really needs to know the facts........
Firstly a 1275 Mini engine can be bored to 1425 with a standard stroke using 74.7mm pistons from the triumph engine range.
Secondly although a 1275 Mini engine cannot be overbored to 1480 they can be "stroked" to 1596cc .... 74.7mm pistons with a Farndon or similar 91mm crank.
Turbo Mini engines are now able to put out in excess of 200BHP
Gearboxes for Classic Mini can be modified to accept 200BHP with pretty good reliability, ie 10,000 miles is reasonable mileage.
Fitting Honda or Vauxhall engines in to Mini's often result in less acceleration as 1st gear is far too low, the gear ratio's are more suited to a full race engine but on the road
In 1968 the British Vita Min (yes it was a pun) run a 1293 turbo with 180BHP, in the mid 80's the turbo challenge ran 240bhp as a norm, since then better machining practices on better materials have resulted in some astounding leaps forward, 16v turbo 1380 .... reputedly putting out 275BHP
My own six speed Aseries dog box has bearings and shafts that can take more than twice the old unit......
it's back to weight transfer now as some of the quicker Mini's are getting in the 11 sec's 1/4 mile at over 125mph.
Firstly a 1275 Mini engine can be bored to 1425 with a standard stroke using 74.7mm pistons from the triumph engine range.
Secondly although a 1275 Mini engine cannot be overbored to 1480 they can be "stroked" to 1596cc .... 74.7mm pistons with a Farndon or similar 91mm crank.
Turbo Mini engines are now able to put out in excess of 200BHP
Gearboxes for Classic Mini can be modified to accept 200BHP with pretty good reliability, ie 10,000 miles is reasonable mileage.
Fitting Honda or Vauxhall engines in to Mini's often result in less acceleration as 1st gear is far too low, the gear ratio's are more suited to a full race engine but on the road
In 1968 the British Vita Min (yes it was a pun) run a 1293 turbo with 180BHP, in the mid 80's the turbo challenge ran 240bhp as a norm, since then better machining practices on better materials have resulted in some astounding leaps forward, 16v turbo 1380 .... reputedly putting out 275BHP
My own six speed Aseries dog box has bearings and shafts that can take more than twice the old unit......
it's back to weight transfer now as some of the quicker Mini's are getting in the 11 sec's 1/4 mile at over 125mph.
04-08-2010, 06:17 PM
#15
20K+ Super Poster.
Stud nicklaus had some serious power, boxes to take over 100bhp all day long have been avaialable for years, built to order, if he's still going, by Graham Boulton, of E Dereham, Norfolk, who did a lot of the original boxes on the proper italian job film.
Lotus when developing the turbo metro were killing boxes with std mg power, ie 72, beleive it's the centre web rips out ?
tabetha
Lotus when developing the turbo metro were killing boxes with std mg power, ie 72, beleive it's the centre web rips out ?
tabetha
04-08-2010, 06:20 PM
#16
Still got the mini, but not sure what I'll do with it, either vauxhall engine but more moderate power or celica gt4 power possibly.
04-08-2010, 06:29 PM
#17
Dave not Claire.
The parts havent got any stronger since then mate.
Exactly, 90bhp is cheap to get, and tends to be reliable, once you venture beyond that, if you drive it hard, you'll be forever spending money.
My trackday 'A' was over 100bhp, but I wouldnt have a big miles 'A' powered road car at the same level personally.
Exactly, 90bhp is cheap to get, and tends to be reliable, once you venture beyond that, if you drive it hard, you'll be forever spending money.
My trackday 'A' was over 100bhp, but I wouldnt have a big miles 'A' powered road car at the same level personally.
Completely agree Chip. I own an ex race Mini from MBE in Lincoln. it is road legal and over 80 Whp from a 1293. it is horrible on the on the road as it is so highly tuned. (and bloody thirsty)
yes all the parts are available to retain reliablity these days, but you pay for them, go look on www.turbominis.co.uk its definatly the way forward for a fast road car thats reasonable to drive 'most' days.
04-08-2010, 06:58 PM
#18
Happily retired
04-08-2010, 07:59 PM
#19
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If it was supercharged ..... then maybe there was 2 of them as the photo I have is definately a turbo
And yes mechanical fuel injection.....
04-08-2010, 08:43 PM
#20
100bhp is nothing, and could easily be ultra reliable.
Even 150bhp can be achieved without any trouble and a good straight cut will handle it all day long.
The metro turbo used lower boost in the mid range to try and save the gearboxes. But basically the std gearset was soft as anything, and were very easily stripped.
Although centre webs do crack too eventually if you get silly.
Even 150bhp can be achieved without any trouble and a good straight cut will handle it all day long.
The metro turbo used lower boost in the mid range to try and save the gearboxes. But basically the std gearset was soft as anything, and were very easily stripped.
Although centre webs do crack too eventually if you get silly.
04-08-2010, 09:18 PM
#21
Happily retired
British Vita were one of the most successful A series tuning houses of the 60's. They were consistently innovative in their thinking and were responsible for "among other things" the first semi space framed Mini, the first 3.5 litre rear wheel drive Mini and the very first "weight saving" glassfibre flip up front end. Although the y competed very successfully throughout the 60's in a whole range of motor sport both as "Works" Supported" entrants or in the later years as a full blown works team their finest season was that of 1968, the statistics were as follows.
John Handley
1968 European Touring Car Champion. Division One. BLMC 999cc Mini Cooper 'S'. Also highest overall points in European Championship (48).
Car Prepared by: B.V.R.T. Ltd.
Harry Ratcliffe
1968 B.R.S.C.C. Northern Saloon Car Champion. BLMC 999cc Mini Cooper 'S'.
Car Prepared by: B.V.R.T. Ltd.
Jeff Goodliff
1968 B.A.R.C. Hill Climb Champion. BLMC 1293cc Supercharged Mini Cooper 'S'.
Car Prepared by: B.V.R.T. Ltd.
The famous 180bhp car had Sprint (cutdown) bodywork.
Anything else you have seen is not an orginal car from 1968. I was supercharging Minis at the time.
John Handley
1968 European Touring Car Champion. Division One. BLMC 999cc Mini Cooper 'S'. Also highest overall points in European Championship (48).
Car Prepared by: B.V.R.T. Ltd.
Harry Ratcliffe
1968 B.R.S.C.C. Northern Saloon Car Champion. BLMC 999cc Mini Cooper 'S'.
Car Prepared by: B.V.R.T. Ltd.
Jeff Goodliff
1968 B.A.R.C. Hill Climb Champion. BLMC 1293cc Supercharged Mini Cooper 'S'.
Car Prepared by: B.V.R.T. Ltd.
The famous 180bhp car had Sprint (cutdown) bodywork.
Anything else you have seen is not an orginal car from 1968. I was supercharging Minis at the time
.
02-02-2014, 06:01 PM
#23
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hi all new boy i raced a 1480 mini as a hot rod on grass and tarmac you need a 1300 block bored 76.5 using triumph 2.5 piston a standard 1330 crack off set ground 84.4 a 39 31 valve head straight cut drop gears a jack knight box with lsd a 48 single webber cars will give you 121 aprox bhp at the wheels aprox 151 bhp at the flywheel faster than most 177 2lt pinto fords and that was 25 years ago now cheaper to fit a 2lts vauxhall red top hope that helps
21-02-2014, 10:31 PM
#25
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Oh please I wish you armchair types would do your home work.....
1480cc Mini engine is a combination of 74mm bore x 86mm stroke, any maths types can easily prove this !
The crank is NOT a standard item, it has to be a bespoke crank or made from a brand new forging (rare to say the least).
The pistons are NOT triumph but well respected OMEGA's or similar, can be Simca if you can get them.
1635cc is the biggest possible A series that I have built !!! yes built not talked about people.
This is 74.7 (triumph pistons) by 93mm stroke, not overly reliable but s*** loads of torque.
anything over 84mm stroke will need an older A series block
and to stroke a standard crank you will again need an A series as the A+ has rolled fillets and is not any use for offset grinding
1480cc Mini engine is a combination of 74mm bore x 86mm stroke, any maths types can easily prove this !
The crank is NOT a standard item, it has to be a bespoke crank or made from a brand new forging (rare to say the least).
The pistons are NOT triumph but well respected OMEGA's or similar, can be Simca if you can get them.
1635cc is the biggest possible A series that I have built !!! yes built not talked about people.
This is 74.7 (triumph pistons) by 93mm stroke, not overly reliable but s*** loads of torque.
anything over 84mm stroke will need an older A series block
and to stroke a standard crank you will again need an A series as the A+ has rolled fillets and is not any use for offset grinding
21-02-2014, 10:41 PM
#26
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If they are driven by a moron I agree, however thats true for almost any car on the planet !
I have seen over 200bhp reliably from an A series without destroying the box, half the battle is uprating the correct parts and building it correctly.
My own is 180 bhp turbo with over 84k miles on the same gearbox, numerous clutches but thats another story
I have seen over 200bhp reliably from an A series without destroying the box, half the battle is uprating the correct parts and building it correctly.
My own is 180 bhp turbo with over 84k miles on the same gearbox, numerous clutches but thats another story
21-02-2014, 10:48 PM
#27
Mega thread revival but while youre at it.My old mans cousin still has a 998 cooper in his garage chocolate roof.And my old bloke went to Italy and back in a fasterish cooper because they used to race them back in the day.Does this count for this thread .
I will add when MY mates had them when I was younger.I used to menace the fuck out of the "fast" minis in my Fiat 127 sports/Gt's.
I never lost an once of sleep
I will add when MY mates had them when I was younger.I used to menace the fuck out of the "fast" minis in my Fiat 127 sports/Gt's.
I never lost an once of sleep
Last edited by Rax; 21-02-2014 at 10:50 PM.
21-02-2014, 10:49 PM
#28
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For those wishing to build a high power Mini us the later 3 bolt case, this is the case with yep you guessed it ! 3 bolts.... holding the double roller bearing in to the case, there are other mods as well that increases strength and reliability.
PS 320bhp from an A series turbo and that is without NOS
PS 320bhp from an A series turbo and that is without NOS
21-02-2014, 11:56 PM
#30
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When you consider that the A series first went into production as an 803cc unit with a massive 32bhp
Now consider it against the Cosworth 2 litre turbo used in Sierra's that would have to have 2250bhp to get the same % increase
PS the Turbo was 93bhp not 105bhp, not sure where you got that figure from ?
22-02-2014, 05:39 PM
#31
Ok I was a bit abrupt so I will apologise for that.I am a bit black and white plus I had beer.
No, no stutter I just found it quite hard to believe the power you quoted and tbh I still do.Genuinely interested if you have any links or videos for such said power.
I know there is a guy on here that has a YB powered mini (sarny) maybe.Good build and there is videos.
Any links would be appreciated and I will show my mate down the street seeing as he owns12 of the buggers in different guises he will like.
No, no stutter
I just found it quite hard to believe the power you quoted and tbh I still do.Genuinely interested if you have any links or videos for such said power.I know there is a guy on here that has a YB powered mini (sarny) maybe.Good build and there is videos.
Any links would be appreciated and I will show my mate down the street seeing as he owns12 of the buggers in different guises he will like.
23-02-2014, 06:35 PM
#34
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[quote=Rax;6430078]Ok I was a bit abrupt so I will apologise for that.I am a bit black and white plus I had beer.
No, no stutter I just found it quite hard to believe the power you quoted and tbh I still do.Genuinely interested if you have any links or videos for such said power.
Over 30 years of redesigning and manufacturing parts for Classic Mini has taught me a few things.... one of those things is that, there are a few people who don't believe what they are being told and think that it makes a difference to me if you believe it or not
I have trashed sierra cosworths with reputably 400bhp, in my own turbo mini, I have seen the mess after a "disbeleiver" thought that his Volvo could out brake a seriously modified Mini (285mm front discs with 4 pots) I have even seen the fastest mini in the world ... which still is a Classic Mini, I have been witness to so many people losing face to a Mini that I am pretty sure you wouldn't believe it but do I care ? Not really, I understand that when somebody loses to a Classic Mini they won't tell anyone about, certainly won't bragg about down the pub, so I just enjoy out accelerating M3 BMW's and Ferarri's etc.... but I don't even bother with the boy racer brigade, the people that couldn't believe anything even with the proof disappearing from their forward view
However for those that are truly interested in amazing machinery....
http://www.minitorque.com/forum/f212...s-turbo-27088/
No, no stutter
I just found it quite hard to believe the power you quoted and tbh I still do.Genuinely interested if you have any links or videos for such said power.Over 30 years of redesigning and manufacturing parts for Classic Mini has taught me a few things.... one of those things is that, there are a few people who don't believe what they are being told and think that it makes a difference to me if you believe it or not
I have trashed sierra cosworths with reputably 400bhp, in my own turbo mini, I have seen the mess after a "disbeleiver" thought that his Volvo could out brake a seriously modified Mini (285mm front discs with 4 pots) I have even seen the fastest mini in the world ... which still is a Classic Mini, I have been witness to so many people losing face to a Mini that I am pretty sure you wouldn't believe it but do I care ? Not really, I understand that when somebody loses to a Classic Mini they won't tell anyone about, certainly won't bragg about down the pub, so I just enjoy out accelerating M3 BMW's and Ferarri's etc.... but I don't even bother with the boy racer brigade, the people that couldn't believe anything even with the proof disappearing from their forward view
However for those that are truly interested in amazing machinery....
http://www.minitorque.com/forum/f212...s-turbo-27088/
23-02-2014, 06:56 PM
#36
Righto a bit of trumpet blowing but if this is you and your car I believe you "not that it makes a difference to you,or me neither for that matter.I only asked for a link .
http://www.streetfire.net/video/mini-turbo_44197.htm
Beat me to it then.
http://www.streetfire.net/video/mini-turbo_44197.htm
Beat me to it then.
Last edited by Rax; 23-02-2014 at 06:56 PM. Reason: already posted
23-02-2014, 07:05 PM
#37
If you polish a turd all you have is shiny shit, minis have to be the worst car I have ever owned or modified or driven.
I would never own one again ever. They couldn't handle the standard power never mind ploughing loads of money into one to make it handle even worse (if that is possible).
Each to their own I suppose.
I would never own one again ever. They couldn't handle the standard power never mind ploughing loads of money into one to make it handle even worse (if that is possible).
Each to their own I suppose.
23-02-2014, 07:09 PM
#38
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No its not my car, mine will do as I said on 180bhp
There is an acceleration chart for Matts Mini ... 80 to 116 in just a tad over 4 seconds, most Minis with 200bhp will clear 0 to 60 in sub 3.5 seconds, my own does it in 1st gear
Mph in gears
1 = 62
2 = 88
3 = 112
4 = 138
5 = 160
6 = 179
Yep its a 6 speed in an A series
There is an acceleration chart for Matts Mini ... 80 to 116 in just a tad over 4 seconds, most Minis with 200bhp will clear 0 to 60 in sub 3.5 seconds, my own does it in 1st gear
Mph in gears
1 = 62
2 = 88
3 = 112
4 = 138
5 = 160
6 = 179
Yep its a 6 speed in an A series
23-02-2014, 07:16 PM
#39
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If you polish a turd all you have is shiny shit, minis have to be the worst car I have ever owned or modified or driven.
I would never own one again ever. They couldn't handle the standard power never mind ploughing loads of money into one to make it handle even worse (if that is possible).
Each to their own I suppose.
I would never own one again ever. They couldn't handle the standard power never mind ploughing loads of money into one to make it handle even worse (if that is possible).
Each to their own I suppose.
that is simply stupid and a remark I'd expect from somebody who knows bugger all about cars !
If you buy a shit escort you will get the same results chap
If you know anything about cars you will also know that it doesn't matter what car it is, who made it or even what colour it is..... with the right work and amount of expense you will get a good car... this even works on Escorts
23-02-2014, 07:21 PM
#40
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I do have a Transit as well.... just in case you thought I only had a Mini
6 speed 140bhp crap at towing though kills clutches like they are going out of business :-(
I have manufactured parts for Fords, as OEM and aftermarket, standard and performance, if you own a sierra then you will have parts that I have made on your car
6 speed 140bhp crap at towing though kills clutches like they are going out of business :-(
I have manufactured parts for Fords, as OEM and aftermarket, standard and performance, if you own a sierra then you will have parts that I have made on your car