[1320autos]

Well we actually put the One on the rolling road today. We have performed the following mods

02 Cooper ECU
6 Spd Getrag Gearbox
Alluminum Flywheel
Stock clutch

Other than that everything else is stock as a rock.

The power figures on Tesco 99 were the following;

BHP 129.9 @ 6140
WHP 103.5 @ 6140
TRQ 116.4 @ 4811

Tomorrow

We will fit the exhaust manifold of the our other One and re dyno

We will then have a Cooper S front pipe with a very free flowing silencer from DNA mufflers (sounds like a Honda though) and re dyno

We will keep updating this thread with each modification and post the results.

We plan on fitting

Various cams
CNC Head
Air Filters

We will also be experimenting with various off the wall ideas

If we remember we’ll video it tomorrow on the dyno.

[MartinSSZ]

Excellent, keep us updated

[1320autos]

Our first test today was with the exhaust manifold off our S powered Mini One, this had showed on the S a power increase of 20+BHP.

So here are the gains on the N/A engine

2800 0.7
3000 1.4
3200 0.9
3400 -0.2
3600 0.5
3800 2.1
4000 2.6
4200 4.4
4400 4.4
4600 4.7
4800 3.8
5000 4.0
5200 4.6
5400 3.9
5600 3.4
5800 1.7
6000 1.1
6200 0.7
6400 0.0

[Alex5]

About 4.5bhp in the mid-top end from a manifold, that's not bad for a 1.6 NA engine.

What manifold is this?

[1320autos]

Our second round was with the header and our DNA muffler.

So here are the gains and losses from the muffler

2800 -0.9
3000 0.0
3200 1.0
3400 0.6
3600 -0.5
3800 -0.4
4000 -0.8
4200 -0.3
4400 -0.3
4600 -3.0
4800 -2.9
5000 -0.5
5200 1.0.
5400 0.6
5600 0.6
5800 1.8
6000 3.8
6200 4.3
6400 4.5
6600 5.2

[1320autos]

We've just tried something and it made 141.6 bhp @ 7127 if we could rev it to 8000rpm we would be laughing, but the area between 4400 -6800 is horrible we lost between 6-18bhp

Which just go to show its not all about the max bhp but the area under the curve, though even with these losses its still better than a stock Mini One

[minioneandrew]

Very interesting! Keep us informed. I can feel the money in my wallet trying 2 escape! lol.

[minioneandrew]

When will you be doing air filters! Im going to be buying another 1 soon!

[MINIMANIAUK]

Very interesting Paul, what manifold did you use? 4.5 is not a great improvement so I guess it was a 4-1 manifold,which is not best suited to the one/cooper,but often still fitted regardless.
Also the exhaust/manifold combo was not impressive,it does show that correct matching of components is very important,and simply buying and fitting a mixture of components all individually claiming" x" increase will not result in x + x + x ,they have to work in harmony with one another. I blame ebay
I think you will find the cylinder head restricts a lot of flow ,and trying to drag air through it with an 4-1 hard to say the least.
I do have a manifold here if you would like to try one and have the time to test it,
what diameter is the exhaust pipework? if its too big the one/cooper drops power -sounds good though .lol
I would expect 14 bhp off manifold and plus 6-8 with exhaust across the rev range

[MiniPetrolHead]

In my eyes the type of manifold that is used on the Mini One/Cooper can drastically alter performance,

for example a friend of mine has had a ported and pollished big valve cylinder head and fast road cam engine conversion done, and on the dyno its producing just over 150bhp with the cat back exhaust, induction kit etc, but she has a performance 4-1 manifold which im only guessing would be producing the bhp but not the torque of a 4-2-1 that MiniMania offer.

What is even more interesting is that i have not yet had an engine conversion, i have the same mods as her, its just the exhaust manifolds are different ( i have a MiniMania 4-2-1). Im producing 135.4bhp and she is producing just over 150bhp and i still pull away from her, ok its only very very slight but it should be the other way round at least!!! I supose its just down to where the torque is in the rev range?

As adam (MiniManiaUK) said the manifold type used when tuning and matching the mods together really is key to getting the max out of our naturally aspirated little 1.6 engine!

Alex

[minioneandrew]

Funnily enough, After i had the Milltek cat back put on i noticed a decrease in torque. And then had the janspeed manifold put on but i never noticed a drop in torque?

[MiniPetrolHead]

Im not saying you will loose torque, just maybe not gain as much or the torque will be at a different place in the rev range. I just would have thought that the 150bhp Mini One would have wooped my 135bhp Mini's back side, instead i was pulling away????

[minioneandrew]

Maybe you are just a better driver? Its also about knowing when to change gear to get the best power to the wheels!

[MiniPetrolHead]

Yeah that may be ture, but the thing is that the driver was infact the owners brother who happens to be one of my best mates, he owns a MiniSpeed/Hartge conversion 250bhp Mini Cooper S. He also used to race in formular renault (his name is John Byrne, if you watch formular renault)
So who knows what it is? maybe there is just something wrong with my mates sisters Mini One.

Alex

[1320autos]

Cheers Adam I'll be around to pick it up, this is exactly what we want suppliers / manufactures submitting parts for testing .

I'm glad to see that people are thinking out of the box and realising its not all about the peak horsepower.


We will be using a stock air filter as much as we can in testing to see how far we can go and how much of a restriction it is.

I cant see us getting anything else done this week due to the rolling road being flat out and jobs being booked in, though we might have Friday as an R&D day.

Yet again I've had a frustrating weekend off trying to hook up 1100bhp on street tyres, unfortunatley I couldn't get the car to hook up it kept loosing traction after .7 of a sec, I could off blamed the track but when you have 2 racers in the same class as you producing 1600bhp (heavier cars) and can run 8.1s @ 184, blaming the track cant be used as an excuse, instead you have to think outside the box.

So with the One/Cooper we will defintley be thinking out of the box

[1320autos]

At last we got back on the dyno today and tested Adam's Mini Mania exhaust 421 manifold, unfortunatley I haven't got the time to do all the comparisons but I can tell you that it out performed the 4-1 at rpm in theory it shouldn't off.

It made 139bhp at 6021 and 124 ft lb at 5089 (4-1 manifold made 135.2 at 6210 and 121ft lb at 5667)this was with the DNA exhaust sytem and a STOCK air filter, we actually lost horsepower with no panel filter in the stock housing and with no housing and airfilter.

This news flash is over for now and when I get 5 mins I'll give you more facts and figures.

[MINIMANIAUK]

Thanks to Paul and his continuing efforts well done!
the 4-2-1 made 10bhp over stock and 5 over the 4-1 , you may be puzzled why it out performed the 4-1 at high rpm also , but bear in mind the 4-1 is designed for the forced induction engine (cooper s) not the n/a cooper and one ,as I said previously the one /cooper do not like the larger diameter exhaust (cooper s size) either ,if you step down a small amount in exhaust diameter from the 21/2 cooper s size the power increases by 3-4 bhp and the peak torque point moves.
Now for something even stranger ..... the 4-2-1 out performs the 4-1 on the cooper S also!! even at the high rpms , I believe the cylinder head is such a poor design that even when the engine is supercharged it still requires an extractor manifold to aid the gas flow through the head and valves -despite the higher gas speeds of s/charging.
This is the reason that ported heads with cam and valves add so much power and torque -we have seen + 32 bhp on the S and + 16 on the cooper/one.
Paul keep the manifold and try it on your drag car,just match the exhaust flange holes to your head with a rotary file ,with a nice smooth radius,(The manifold you have is one of our older ones and the new batch are already done) and try on the strip -the clock never lies - I think you will gain a full 1/4 second
I really do wish someone would make a twin cam head for the Mini

[1320autos]

Thanks Adam that was going to be my next question whether we could take the rotary file to it

It would be nice if we can gain some torque from 3000 up because this will lower our 60ft.

I'm not sure if we'll have time to test it before Sat unless I do a couple of all nighters

[MiniPetrolHead]

Thanks for that 1320autos and MiniMania, have always wondered what the actual difference would be between the 4-1 and 4-2-1 manifolds.

So for the Mini One/Cooper does too larger pipe work on the exhaust manifold mean less power and torque?

The results given would sort of explain the reason why i pull away from my friends Mini? (due to manifold type even though she has had cylinder head work done?)

Alex

[1320autos]

I forgot to ask the other day Alex, what year is her Mini One??