81 replies to this topic

[Phobic]

I can get to about 55mph at 4K on my 998. I want more power...

[RossKnight]

I can get to about 55mph at 4K on my 998. I want more power...

 

Have you found fourth gear yet?..

[Phobic]

 

I can get to about 55mph at 4K on my 998. I want more power...

 

Have you found fourth gear yet?..

 

dude, that IS 4th gear! it's a mini van. no idea what the fdr is though. 

[Grimshaw17]

I once hit 88mph and went back to 2014....

[Green-Chameleon]

 

8,5!!
 
4,5 and it's waving a white flag.
 
 

haha mine sounds angry at anything about 90 and thats a 1275, only additional extra is k&n air filter.

90? I take it, that is km/h? I see you're in the UK, surely it's not 90mph? Convert that to km/h and you get 144!! I only get that on eurotunnel!

No that's mph. 90 is the max without her sounding like she's gonna fall to pieces

 

 

My 35 was standard bar a K&N and the most I did is 90Mph - I felt like a skipping stone on water with a pissed off sounding mini.

[mini93]

Had about 105mph-ish coming upto Avon rise at Castle Combe.

 

Unknown power output- 1360cc, 286 scatter cam, worked head (standard large MG valves), webber 40, megajolt (map type), Steel ultralight clutch set up, SC drops, JKD box 3.7:1 differential, 10x6 wheels165/70 A008's

[willava182]

93mph on the dyno, basically an MG Metro 1275 engine

[lyndseyp27]

8,5!!
 
4,5 and it's waving a white flag.
 
 

haha mine sounds angry at anything about 90 and thats a 1275, only additional extra is k&n air filter.

90? I take it, that is km/h? I see you're in the UK, surely it's not 90mph? Convert that to km/h and you get 144!! I only get that on eurotunnel!

No that's mph. 90 is the max without her sounding like she's gonna fall to pieces

 
My 35 was standard bar a K&N and the most I did is 90Mph - I felt like a skipping stone on water with a pissed off sounding mini.

Mine sounds like it's going to fall to pieces haha only dared do that a few times - don't quite trust the old girl

[Cooperman]

In the 'S' I've had 7000 rpm in 4th which is around 100 mph. I've had 6700 rpm in top on a gravel forest road which  is about 94 mph. Now, that was exciting. I have a 3.9:1 FDR by the way.

As a guide, the original 850 with 34 bhp would top out at c.72 mph which was about 5100 rpm. The 998 Cooper with 55 bhp would do about 87 mph which was 5900 rpm. The original Cooper 'S' 1275 with 75 bhp would go to about 96 which was 5850 rpm. 

Later cars had higher aerodynamic drag due to wheel arch extensions, large wing mirrors and wider wheels & tyres, so for the same power they were slower. The higher gearing also restricted top speed as the cars will not pull to maximum power in top gear, so just can't get there.

It's a complicated formula really, but drag increases as the square of the speed. Twice the speed give four times the drag.

Edited by Cooperman, 28 October 2014 - 06:31 PM.

[IainNeon91]

I have a 998 w/12g295 head, 266 cam and 3.44:1 final drive. 

 

Got about 85mph, but it was screaming at me, said about 6000rpm. It was horrible, thought pistons were going to fly out left, right and centre!

 

But due to the syncros in this gearbox I am going to be going back to the more civilized 3.1:1 FDR with my other gearbox. 60mph at 4200rpm wasn't pleasant on LtoB this year... 

[Artstu]

6000 revs in 4th with a 2.95 diff was easy in the Midas on the autobahn, that's 120 ish.

Edited by Artstu, 28 October 2014 - 06:48 PM.

[Cooperman]

I have a 998 w/12g295 head, 266 cam and 3.44:1 final drive. 

 

Got about 85mph, but it was screaming at me, said about 6000rpm. It was horrible, thought pistons were going to fly out left, right and centre!

 

But due to the syncros in this gearbox I am going to be going back to the more civilized 3.1:1 FDR with my other gearbox. 60mph at 4200rpm wasn't pleasant on LtoB this year... 

85 mph is 5100 rpm in top with a 3.44:1 FDR.

5100 is not a high rev figure for a 998, which is capable of cruising all day at that, and in fact the 998 Cooper used to do that easily.

Of course the A-series is not as smooth at high revs as a modern twin-cam multi valve 5-bearing small engine, but it won't blow up unless it is in poor shape.

A 998 with a 266 and a Cooper head is ideal with a 3.44:1. Any higher FDR will ruin the acceleration.

[IainNeon91]

 

I have a 998 w/12g295 head, 266 cam and 3.44:1 final drive. 

 

Got about 85mph, but it was screaming at me, said about 6000rpm. It was horrible, thought pistons were going to fly out left, right and centre!

 

But due to the syncros in this gearbox I am going to be going back to the more civilized 3.1:1 FDR with my other gearbox. 60mph at 4200rpm wasn't pleasant on LtoB this year... 

85 mph is 5100 rpm in top with a 3.44:1 FDR.

5100 is not a high rev figure for a 998, which is capable of cruising all day at that, and in fact the 998 Cooper used to do that easily.

Of course the A-series is not as smooth at high revs as a modern twin-cam multi valve 5-bearing small engine, but it won't blow up unless it is in poor shape.

A 998 with a 266 and a Cooper head is ideal with a 3.44:1. Any higher FDR will ruin the acceleration.

 

 

It doesn't seem that much quicker off the line than the 3.1:1 to me... Personally I think the lower rpm at high speeds and greater top end will outweigh the losses down low, I'm probably wrong, but the 3.1:1 will be more practical for me and my motorway driving, being my daily car and all that! aha

Edited by IainNeon91, 28 October 2014 - 07:14 PM.

[1984mini25]

 

 

I can get to about 55mph at 4K on my 998. I want more power...

 

Have you found fourth gear yet?..

 

dude, that IS 4th gear! it's a mini van. no idea what the fdr is though. 

 

 

Sounds more like the final drive than a power issue, my 998 with a 2.9 dif will easily do 60mph at 3k in 4th.

[petey81]

My tuned 998 does bang on 88 on a straight, sits at 70 nicely at 4k.
Unsure what fdr.

Edited by petey81, 28 October 2014 - 08:28 PM.