What's the catch?

JamesV6CDX · 18 December 2006, 07:33:37

http://www.speedydelivery.co.uk/car-tuning-power/vauxhall-senator.shtml

I can't believe this works, for a £5 ?

Big Rod · 18 December 2006, 10:00:23

Well, it will, kind'a.

The blurb the guys got is pretty much BS. All this is in effect is a resistor that sits between the ECU's engine temperature sensor and the ECU itself fooling the 'brain' into thinking the engine's still cold and overfueling it!! (Ever noticed how your car's a little more spritely before it fully warms up?)

Anyway that's about it. Supra owners used to do the same by fitting a rheostat in between the temp sender and the ECU.

omegaV6CD · 18 December 2006, 10:46:42

Quote

http://www.speedydelivery.co.uk/car-tuning-power/vauxhall-senator.shtml

I can't believe this works, for a £5 ?

It would actually provide some more power under certain weather conditions, but you would need to be really carefull about it. Naturally aspirated cars are more forgiving to that mod, on turbo's it would result to melted pistons. The problem is that it is very lickely to end up with wrong A/F ratio, exhaust temperatures, ETC. I personally wouldn't mess about with it, the sensor is there for a reason.

tunnie · 18 December 2006, 10:48:57

do not buy!!!!

They appear on fleabay all the time, IIC they just fool the ECU into thinking its colder than it acutally is. There for the ECU puts in more fuel, and you go a little faster. But it does not take long for the ECU to adjust and soon its does break hall.

You'd be better off paying £5 on some carb cleaner James

Del Boy · 18 December 2006, 19:03:36

Quotedo not buy!!!!

They appear on fleabay all the time, IIC they just fool the ECU into thinking its colder than it acutally is. There for the ECU puts in more fuel, and you go a little faster. But it does not take long for the ECU to adjust and soon its does break hall.

You'd be better off paying £5 on some carb cleaner James

100% Agreed these do do chuf all

STMO123 · 18 December 2006, 19:12:33

Wheres the catch?

The catch is....they dont work

Bo Bo · 18 December 2006, 20:14:55

I tried one a couple of years ago & the dash lit up like a Christmas tree, took it straight back off....

JamesV6CDX · 19 December 2006, 00:57:36

I wasn't considering buying one, just interested in what it was all about. I guessed it would be BS....

omegaV6CD · 19 December 2006, 01:27:54

QuoteWheres the catch?

The catch is....they dont work

Apparently this patent can work if you know what you are doing and it can provide a good power increase, please do not judge if you don't know!

Admin · 19 December 2006, 07:53:59

Kostas, in principle they will work, but it is like anything to do with the combustion engine. Increases in power without an increase in efficiency requires more fuel.

With todays adaptive ecu's the benefit will last for a very limited time inly.

To anyone looking for more power I would say the following.

Very regular maintenance. A healthy engine is an efficient (relatively speaking of course).

Make sure your tyre pressures are spot on.

Look at what you don't need to carry in the car (don't throw the spare wheel!).

omegaV6CD · 19 December 2006, 09:49:49

QuoteKostas, in principle they will work, but it is like anything to do with the combustion engine. Increases in power without an increase in efficiency requires more fuel.

With todays adaptive ecu's the benefit will last for a very limited time inly.

To anyone looking for more power I would say the following.

Very regular maintenance. A healthy engine is an efficient (relatively speaking of course).

Make sure your tyre pressures are spot on.

Look at what you don't need to carry in the car (don't throw the spare wheel!).

Dave, I agree with most of your theory, but on a IC engine there are 3 efficiencies the Volumetric the mechanical and the combustion efficiency in any engine that you optimise the fueling and timing characteristics you improove the combustion efficiency, i'm not saying that the cheap resistor is an accurate optimisation tool but if you could achieve something if you were very caefull with the way you implement it.

Markie · 19 December 2006, 15:32:48

wouldnt be me i`m afraid

STMO123 · 19 December 2006, 19:50:31

Quote
QuoteWheres the catch?

The catch is....they dont work

Apparently this patent can work if you know what you are doing and it can provide a good power increase, please do not judge if you don't know!

OK. They dont work unless you are into the finer points of engine characteristics, and the people who buy these obviously aren't, or they wouldn't buy this particular 'mod'.
The original question was whether, for a five quid resistor, one can get a noticable increase in power output. I would say your average punter could do more harm than good.

bexandpower · 19 December 2006, 22:15:54

definatly more harm than good. Looked into this and consulted the RS book (good old RS) found out it was a 50p resistor that would probably fail after about a month. Oh well looks like sonic cleaning for the injectors after all.

familyman · 19 December 2006, 22:43:52

I have to agree no cheap products would give proper power gains for any length of time, the oxygen sensors in the exhaust would tell the ecu the mixture is to rich it would then compare coolant temp and readings from other sensors and how long the engine has been running and realter injector pulse width and timing to what they should be for oxygen sensors to read correct.

Besides overfuelling for to long would end up burning valves out. Best stay clear.

Use the old saying for more power and torque "you can't beat cc"

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What's the catch?

STMO123

STMO123