I want a bit less power

[steve-V8s]

As the title says I want less power !

Well not quite, the Emerald has three maps and I want to set one of them to reduce the available torque and generally make the car tamer over the entire rev range. The idea being I can select this map to keep me out of trouble in the wet. I guess the easiest way is simply to retard the timing everywhere and one way I can see of doing that is to set a retard value in the coolant temperature correction chart, that should effect the whole map.

Any of you Emerald experts got suggestions of another way.

[Ant.]

Pretty sure you select all the cells and do a reduction in them all , to the same value.

Wouldn't it be easier to just have a duplicate map with a reduced rev limit?

[griffdude]

Won't that muck up the handicap calcs tho?

[steve-V8s]

Just setting a low rev limit doesn’t really help, It limit’s the maximum power but I want to reduce the torque over the useable range not just the maximum. The wet map will have a lower limit but not so low that it makes the car unusable. I suppose really I am asking if knocking the timing back one or two degrees is the way to do it. Is it that simple ?

[ESDavey]

It's the peddle on the right feel the force young Jeddi

Edited by ESDavey on Saturday 11th July 01:58

[V8TVR1978]

ESDavey said:

It's the peddle on the right feel the force young Jeddi

Edited by ESDavey on Saturday 11th July 01:58

The fast peddle will also work as the slow peddle..Just keep your foot out of it and the car works just great in any weather. I have above average horsepower and my car weighs 1108 Kgs with me in it and my biggest worry in wet weather is trying to stay dry with the leaky sunroof. I want more horsepower, and I will respect my car alittle more.

[Uncle Fester]

When I was being mapped at Emerald, Dave did a ‘limp home’ version of the main map. He just retarded the timing 2⁰ presumably this would have the effect you’re after.

[spitfire4v8]

surely you dont want to limit all the torque, just the bit thats causing you trouble, ie you might be ok up to 2000rpm, then limit the output up to say 4500rpm where the natural torque fall of takes over anyway. a similar thing was done by BL on the metro turbo to save the gearbox by capping the torque at 95lb.ft or something. you just need to cap it above say 300 *

• I personally don't think this will help you one jot though unless you have a particularly unruly power delivery.

[JonRB]

V8TVR1978 said:

ESDavey said:

It's the peddle on the right feel the force young Jeddi
The fast peddle will also work as the slow peddle..Just keep your foot out of it and the car works just great in any weather. I have above average horsepower and my car weighs 1108 Kgs with me in it and my biggest worry in wet weather is trying to stay dry with the leaky sunroof. I want more horsepower, and I will respect my car alittle more.

The big Rover V8s - especially the 5L - have so much torque from almost tickover that you can very easily break traction / powerslide from almost idle on cold tyres in the damp, so it's not *just* a case of being easier on the the throttle. I remember almost side-swiping the car next to me waiting to get onto a busy roundabout one cold, damp morning.

I find that my S6-engined Sagaris is just so much easier to drive in that respect due to its (relative) lack of torque at low revs, so I can see where Steve is coming from here.

Edited by JonRB on Saturday 11th July 16:27

[GreenV8S]

steve-V8s said:

The idea being I can select this map to keep me out of trouble in the wet.

Unless you absolutely cripple the engine it will still have more than enough torque to get you into trouble, so I wouldn't put a lot of effort into this solution. If you do take enough advance out to make a significant difference then the 'lost' power will go into your exhaust valves which is not good for the engine.

If you're driving gently, just use a higher gear than normal.

If you're trying to go fast, I find a lower gear works better. (It puts the throttle into a more progressive range, takes you past the sharply rising part of the torque curve and restricts the scope for the revs to flare up when it slides.)

[hiltonig]

Why not fit racelogic traction control, I have done that to help me out for when my right foot isnt quick enough

[HRG.]

hiltonig said:

Why not fit racelogic traction control, I have done that to help me out for when my right foot isnt quick enough

That's exactly what I was going to suggest. I suspect it'll help increase performance too.

[V8TVR1978]

JonRB said:

V8TVR1978 said:

ESDavey said:

It's the peddle on the right feel the force young Jeddi
The fast peddle will also work as the slow peddle..Just keep your foot out of it and the car works just great in any weather. I have above average horsepower and my car weighs 1108 Kgs with me in it and my biggest worry in wet weather is trying to stay dry with the leaky sunroof. I want more horsepower, and I will respect my car alittle more.

The big Rover V8s - especially the 5L - have so much torque from almost tickover that you can very easily break traction / powerslide from almost idle on cold tyres in the damp, so it's not *just* a case of being easier on the the throttle. I remember almost side-swiping the car next to me waiting to get onto a busy roundabout one cold, damp morning.

I find that my S6-engined Sagaris is just so much easier to drive in that respect due to its (relative) lack of torque at low revs, so I can see where Steve is coming from here.

Edited by JonRB on Saturday 11th July 16:27

Jon: Yes having lots of torque in the wet will open your eyes, especially if you are on a road with twistys like you have in the UK. Around here we have twistys if we go to the mountains but we don't head that way unless the weather is A1. So most of our diving in questionable weather is on the flats of the prairies where you can see for miles. I wasn't thinking of who would be reading my post when I wrote it. My car will kick out on dry pavement at 60 or 70 MPH if I am not careful and step on the "go fast peddle". It is one of the cars that the Canadian Importer converted when new and put a V8 into. ( Bless your soul John Wadman. ) We have taken that engine and stroked it to a 347 and added some other goodies for some extra HP. We have another car that John Wadman converted to a V8 that the Spousal Unit drives and we just finished putting a 5 speed automatic in as she just can't get the hang of driving a stick. Even on wet roads that car doesn't like kicking out and that is the way she likes it. To me, that car is boring to drive with that automatic in it. Our 73 2500M that our 18 year old daughter uses has a supercharger on it and produces 130 HP at the back wheels and has a Toyota Supra 5 speed in it. That car you can kick around lots and it is always fun to drive but respect it if the roads are wet. Here is a picture of my car and one of the engine.