- Joined
- Dec 26, 2016
- Points
- 144
- Location
- Spaldingski, Lincs
- Model of Z
- 3 litre Z3 pretending to be Italian exotica. Two previous E89 Z4s.
Unless it was made by TVR and has the words 'speed six' anywhere near it.
Stage 1 tune
- Thread starter inkey$
- Start date
- Joined
- Oct 19, 2014
- Points
- 174
- Model of Z
- 2.2i Sport
Lotus have had problems, too. They can make sizeable holes in the block for no apparent reason.
I have always tuned diesel cars and never been disappointed. The only petrol I have remapped have been turbo charged cars and again been happy. For NA i have never bothered as unless you are decatting, exhaust headers, air flow can't really see the gains to be made
It's not just high revs that give an F1 lots of power.
The F1 engine, inlets, exhaust are all optimized to keep the torque going at high revs. Most road cars aren't.
The F1 engine, inlets, exhaust are all optimized to keep the torque going at high revs. Most road cars aren't.
- Joined
- Dec 26, 2016
- Points
- 144
- Location
- Spaldingski, Lincs
- Model of Z
- 3 litre Z3 pretending to be Italian exotica. Two previous E89 Z4s.
IIRC Lotus have never built an engine (for a road car), though. They take crate engines from others and 'adjust' them.
Lotus designed and built the 900 series engine and the 907 was the first road production engine they used in their own cars and supplied to Jenson. They built the 900 series engine in different forms for botn track, rally and road cars from 72 - 99
Yup. Without getting more air and fuel in then more power is not going to happen.
Having said that...
There are gains to be had from the manufacturers tune which has to work from below sea level in Holland to 7000 feet above sea level in Colarado on whatever fuel meets the requirement by FINE tuning for local conditions and fuel. Vanos can be adjusted, timing can be advanced at altitude where cylinder pressures are lower etc.
For example my s54 runs +1 degree of timing as I am at 5500 feet.
But this ain't an off the shelf tune.
Having said that...
There are gains to be had from the manufacturers tune which has to work from below sea level in Holland to 7000 feet above sea level in Colarado on whatever fuel meets the requirement by FINE tuning for local conditions and fuel. Vanos can be adjusted, timing can be advanced at altitude where cylinder pressures are lower etc.
For example my s54 runs +1 degree of timing as I am at 5500 feet.
But this ain't an off the shelf tune.
Last edited:
Last edited:
- Joined
- Dec 26, 2016
- Points
- 144
- Location
- Spaldingski, Lincs
- Model of Z
- 3 litre Z3 pretending to be Italian exotica. Two previous E89 Z4s.
Cos I've done it. Turns the lowly little N20 into a very rapid car. The torque increase is amazing.Ok. I'll ask. How do you know .
I am still contemplating doing it again on our latest E89 (20i with 180bhp can't remember the torque figures) and my B48 320i with the same power.
The remaps for these engines really do transform them for very little money. Insurance and selling on are the only problems IME.
Just to add to this, the value of torque and bhp increases really depends upon where in the rev range the increases occur. A while back, I did the 2.8 manifold swop to go with other mods and had a remap to suit. The benefit to me was the pulling power in the lower rev ranges - I can drive everywhere in fifth!. The BHP increase though is most likely much farther up the rev range than I can go on the roads around here.
It is not difficult to get a gain of 10% or so from a normally aspirated engine running on decent 98 octane fuel, but on 95 e10 filth at would take a miracle! A lot of engines which have a restricted advance curve for use on poor quality fuel can be usefully improved by a remap, but not all. The Z3 owners manual tells us that the M44 1.9 engine's 140 bhp is only a 'rated' output on 95 octane, but can be improved on 98 the octane for which it is designed. Use of a poorer fuel will siimply cause the ECU to retard the ignition timing to suit.
Have a look at this:
zroadster.org
Have a look at this:
Engine Remapping by Mike Fishwick
Article reproduced by kind permission of Mike Fishwick Many people ask if it worth having their engine management system remapped, the answer being that it works well, with no snags other than the cost – unless you plan to keep the car for a...
zroadster.org