Boost Controllers

[WabTheKing]

the apex avcr also gives you lamda(lean/richness) readings your remaped ecu wont do that so your not completly safe

[dan_b]

Ok so I don't get the figures displayed to me as a driver, but surely a re-mapped ECU is still reading the Lambda and adjusts on the fly? When my Lambda probe went hooky recently, I started getting surging/hesitation issues that were I'm sure resulting from the ECU not getting proper lean/rich measurements from the lambda and was subsequently having problems?

Surely this is telling me that the re-mapped ECU is definitely taking the lambda measurements in to account?

[BRY]

So making fuel consumption worse is a benefit is it?

A reduction in fuel consumption is better isn't it??
Unless you own a petrol company that we don't know about

[S2 Ant]

Im quite interested to know how well this works altho my pockets wouldnt allow me to own such a device.

If say you ran the controller so as to only get a maxium of say 0.5 bar (car mapped for 1.4bar) when you give it WOT, the controller will only allow 0.5bar, is the car actually able to adjust the fuel, given that according to its maps it should be at 1.5bar and needing a lot of fuel, i thought the car would only be able to adjust within a margin of where it thinks it should be.
Maybe ive not followed things correctly.

The cars remapped ECU does still maintain Lambda readings tho AFAIK, i can see no reason why any tuner would prevent the car from using such a basic and obvious safety device on the car.

[rotoryboy]

I think you have to decide what you want from your car. If you want MPG, then fair enough, but I don't think Jeffer, Tom, Doug etc really care what MPG it does, do you?

Point made

[dan_b]

Oh lordy, damn Mr Staropramen and his evil 5% lager that's very easy to drink two of at lunchtime

[dan_b]

Thing is, how many people honestly install a boost controller to improve their fuel economy? That's post-rationalising somewhat isn't it? People surely are installing boost controllers to give them extra Va Va Voom, not as a first priority to say "well of course I'm getting 20% better economy whilst driving in town" which is good for the environment and our pocket my dear"?

[tekkno435]

A reduction in fuel consumption is better isn't it??

I always thought so but hey, i just discovered the world is flat after all.

graham.

[BRY]

I always thought so but hey, i just discovered the world is flat after all.

graham.

Flat out in an S2

[Doug_RS2]

I think you have to decide what you want from your car. If you want MPG, then fair enough, but I don't think Jeffer, Tom, Doug etc really care what MPG it does, do you?

Point made

If I drive at the same speed, same acceleration, as a stock car I will get the same mpg as a stock car, if not better mpg as I can cruise off boost .... but that is hard to do

[Rusty]

My thinking was that the boost controller would cap the boost at less than the car was mapped for and therefore remove the times when you get boost that you really don't need. Fair enough, when thrashing the old gal down an A road, boost is what's required but when driving in a traffic jam it's just drinking fuel that could be saved for a thrash at a later date. Who needs 200+ bhp in town? It'll only get you in trouble! Sure, if you're crazy enough then you can turn the boost up to 11 and hope that the standard map can cope but that's not what I'd do!

As far as I'm aware the ECU constantly remaps itself on part throttle using the lambda signal but I don't think it does on WOT. The ECU reads the sensors in the car and then looks at the map to determine fuel and timing etc. If something changes then the ECU can detect this from the sensor readings and begin to adjust to the new environment. A remapped ECU simply has a different base map and the ECU will still adjust itself to changing conditions and fuel etc. (providing it's been done properly of course).

[tekkno435]

As far as I'm aware the ECU constantly remaps itself on part throttle using the lambda signal but I don't think it does on WOT. The ECU reads the sensors in the car and then looks at the map to determine fuel and timing etc. If something changes then the ECU can detect this from the sensor readings and begin to adjust to the new environment. A remapped ECU simply has a different base map and the ECU will still adjust itself to changing conditions and fuel etc. (providing it's been done properly of course).

Most sense i've seen on this forum in a long time.

graham.

[Rusty]

Thanks, I do try!

[tekkno435]

No disrespect to many people Andy, but it is nice to see that there are some who actually understand the principles. Just approaching this from the numbers angle... There are prolly (i am guessing here) about 120 S2's in the UK that are "tuned", there may be more, there may be less, but not by much. There are HOW MANY Japanese turbo cars that are tuned? Thousands, hundreds of thousands? Who knows (not the insurance companies, that's for sure). There are FIVE different manufacturers, mainstream, of boost controllers. There are at least three people on this forum who are going to tell them all they got it all wrong.... Nah!

graham.

[steve930]

boost controllers are clever little gadgets, i have them on both my porsche and skyline.

But i believe if you can map an ECU with different boost/fuel/timing parameters, such as you can on the bosch systems, then this is the better option.

Most japanese management systems don't have as many built in failsafe features as the bosch system, and therefore its very easy to "plug and play" with a boost controller.

The more serious japanese car tuners, ditch the standard managemnt system/boost controllers, and fit fully mappable setups, such as, HKS Fcon PRO, autronics, Motec etc etc, and write in one or two maps, for hi / low boost and street fuel / high octane race fuel.

definately the best option in my opinion.