30-70mph 3rd gear times

[Aberdeen Al]

Quote: Originally Posted by MINI-Morgan (original)

What map are you running with the JCW injectors??

Standard map.

I was using a stop watch so there may be a very small amount of human error but the times seem to be very close together.

I'll maybe empty my pockets on my next runs -

[Paul Webster]

Before you empty your pockets on a cylinder head and larger injectors I would hit a dyno and see whats wrong at the moment.

Even though these test can have slight human error your times are consistant, you're probably 30 bhp down at the moment.

As Roland has pointed out before try a map sensors as they are cheap and easy to fit and if isn't that you have one spare when it does play up.

I would try a map sensor before you hit the dyno.

Well done to Mini Morgan for this idea and helping his fellow Mini2ers to see if there car is lacking horsepower.

[Fisher]

It's much better to do this test with GPS; or at least check with gps the speedo where are the real 30 and 70 miles.

I will try today my time. Of course I will check before with GPS.

[minicabrio]

This is an interesting thread, with some interesting times being posted!!

What do you reckon a Cooper would run 30-70 in 3rd? I can't make it in 2nd as mine hits the rev limiter at 67mph.

[Aberdeen Al]

Quote: Originally Posted by 1320autos (original)

Before you empty your pockets on a cylinder head and larger injectors I would hit a dyno and see whats wrong at the moment.

Even though these test can have slight human error your times are consistant, you're probably 30 bhp down at the moment.

As Roland has pointed out before try a map sensors as they are cheap and easy to fit and if isn't that you have one spare when it does play up.

I would try a map sensor before you hit the dyno.

Well done to Mini Morgan for this idea and helping his fellow Mini2ers to see if there car is lacking horsepower.

My car will be getting dyno'd before the head work etc and then again afterwards.

Excuse my ignorance but what is a map sensor? What does it do? Where can I get one?

[roland2003]

Hi Guys, apart from gearing and weight, tyre pressures and profile will make a massive difference. Just try pushing a car with 45 profile tyres and 20psi, then another with 40 profile and 35psi! -The difference is huge.!
Also youve got to decide whether your 'flooring it at 30', or 'flooring at 20 ,and starting the clock at 30'.-Big differnce!
The most common 'big power loser' is faulty Bypass valve actuator. -Especially on early cars The car in yesterday was losing (butt dyno) 40 -50bhp ,untill we fitted a new GTT tweaked valve. Other favourites are worn (slipping) belt, incorrectly fitted or split intercooler bellows (including mispositioned clamps). Faulty T Map sensor usually gives horrible running aswell. A GTT service/tune once a year is highly recommended. Belts (standard or modified cars) should IMO be changed once a year /12000 miles.
-Hope this helps.
Best Regards Roland GTT

[Paul Webster]

Wow Roland I cant believe some of the tests you've done, even I wouldn't of thought of that one.

So have you any data you can share with us on the 45 profile tyres and 20psi, then another with 40 profile and 35psi??

[roland2003]

Yes 45 profile and 20psi takes 30 seconds to push a car into the unit ,(heartrate increase by 30 beats) against 23.7 seconds for the 40 profile on 30 psi. (heartrate increase only 21 beats per minute)

[Aberdeen Al]

Quote: Originally Posted by roland2003 (original)

Hi Guys, apart from gearing and weight, tyre pressures and profile will make a massive difference. Just try pushing a car with 45 profile tyres and 20psi, then another with 40 profile and 35psi! -The difference is huge.!
Also youve got to decide whether your 'flooring it at 30', or 'flooring at 20 ,and starting the clock at 30'.-Big differnce!
The most common 'big power loser' is faulty Bypass valve actuator. -Especially on early cars The car in yesterday was losing (butt dyno) 40 -50bhp ,untill we fitted a new GTT tweaked valve. Other favourites are worn (slipping) belt, incorrectly fitted or split intercooler bellows (including mispositioned clamps). Faulty T Map sensor usually gives horrible running aswell. A GTT service/tune once a year is highly recommended. Belts (standard or modified cars) should IMO be changed once a year /12000 miles.
-Hope this helps.
Best Regards Roland GTT

I sat at a steady 30 for a couple of hundred yards then started the clock & floored it at the same time.

Perhaps my bypass valve actuator is faulty - this may have happened since my conversion in Feb? I've changed my T Map sensor again recently and I've checked my I/C boots for leaks - they seem to be fine....................hmmm.

Can someone tell me where I can get a map sensor thing mentioned above ^^

Cheers,

Al

[Paul Webster]

[minicabrio]

Tried it in the Cooper for a bit of a giggle

Heavy Convertible (roof up to aid aerodynamics), Full tank of fuel (filled up 10 minutes previous), Tesco 99 (The Minxs' usual diet), sat at a steady 30 and floored it. Wheels are 215/40/R17 run at 35psi....Did two runs up and down the same dual carriageway and were in 0.2s of each other.

Average = 9.2s

[Paul Webster]

Just recorded on the milk / sandwich run

1st 6.95
2nd 6.95
3rd 6.71

We first recorded the rpm at 30mph on the dyno which was 2680rpm so 70mph comes out at 6253rpm this is on 205/50-15 with an 05 gearbox.

Engine is std 03 with Janspeed manifold and Borla Cooper exhaust.

164bhp per ton

[MINI-Morgan]

Quote: Originally Posted by minicabrio (original)

Tried it in the Cooper for a bit of a giggle

Heavy Convertible (roof up to aid aerodynamics), Full tank of fuel (filled up 10 minutes previous), Tesco 99 (The Minxs' usual diet), sat at a steady 30 and floored it. Wheels are 215/40/R17 run at 35psi....Did two runs up and down the same dual carriageway and were in 0.2s of each other.

Average = 9.2s

The Minx always was a really quick beast though

[MINI-Morgan]

Quote: Originally Posted by 1320autos (original)

Just recorded on the milk / sandwich run

1st 6.95
2nd 6.95
3rd 6.71

We first recorded the rpm at 30mph on the dyno which was 2680rpm so 70mph comes out at 6253rpm this is on 205/50-15 with an 05 gearbox.

Engine is std 03 with Janspeed manifold and Borla Cooper exhaust.

164bhp per ton

So around 6.8 mark for a completely standard engine except manifold/exhaust? Not bad... Did you find the manifold gave better performance or worse?

[MINI-Morgan]

Quote: Originally Posted by Aberdeen Al (original)

I sat at a steady 30 for a couple of hundred yards then started the clock & floored it at the same time.

Perhaps my bypass valve actuator is faulty - this may have happened since my conversion in Feb? I've changed my T Map sensor again recently and I've checked my I/C boots for leaks - they seem to be fine....................hmmm.

Can someone tell me where I can get a map sensor thing mentioned above ^^

Cheers,

Al

I'm the same... steady 30 then boot it and click at the same time. I have to say after doing it a few times my car seemed to pick up alot faster.

Last night it was pulling so hard with the new manifold and pinning me in the seat big time but the GPS was no way fast enough to keep up.

I would get it checked with an ODB2 reader and a rolling road. Can only really be bypass-valve, boost leak somewhere, T-map giving false readings, running seriously rich with the JCW injectors or something I havent thought of yet....

T-Map Sensor is basically a temperture and absolute pressure sensor. e.g 6degress C and 31PSI will require a set amount of fuel as a baseline.