chip to increase bhp to 350

[Guest]

I have a boxster s 987. One of my friemds of a friend ahs told be for £300 he can increase the the car by 70bhp. apparantly it tricks the computer into to thinking its at high altitude therefor increases the o2 consumption into the car hence burning the fuel at a faster rate providing more power. Has anybody had this done and if so, is it worth doing and are there any negatives.

 

[JCB..]

ORIGINAL: drtowel

I have a boxster s 987. One of my friemds of a friend ahs told be for £300 he can increase the the car by 70bhp. apparantly it tricks the computer into to thinking its at high altitude therefor increases the o2 consumption into the car hence burning the fuel at a faster rate providing more power. Has anybody had this done and if so, is it worth doing and are there any negatives.

Is your friends friend called Max by any chance? []

 

[Chris_911]

If it sounds too good to be true then it probably is............

Do you honestly believe that there is 70hp lurking in a Porsche engine to be had for 300 notes?

 

[Geoff_Fields]

The only way you can get more o2 into the engine is by forcing it in with a turbo or supercharger and by chemical means using nitrous injection. I think you should keep well away from your freinds "freind"[]

 

[Richard_Hamilton]

Porsche do a really good job of fuel mapping. There are a few good specialist re-mapping companies that can give you a 15-20 bhp increase by live mapping on a dyno, but you are looking at £500 ish. I'd steer well clear of anyone who makes the kind of claims you have heard.

 

[daro911]

ORIGINAL: drtowel

I have a boxster s 987. One of my friemds of a friend ahs told be for £300 he can increase the the car by 70bhp.

Never realised before that New Labour's spin machine had an interest in Porsche cars also [] Very scary living in this nanny state when my pride and joy bhp can be spun also []

 

[Guest]

Defo not possible.......[8|]

 

[Guest]

i shall go and speak with this block and find out exactly what he wants to do and show him these comments and see what he says. shall get back in touch!!!

 

[channella]

I don't believe these claims either. You'd need forced induction as already mentioned. Chipping without modifying induction has limited benefits anyway.

 

[marcusLondon]

Oh dear. Looks like I wasted £6,000 rebuilding and blueprinting my engine, changing the exhaust and cat systems and having a bespoke ECU remap when for £300 I could have had an 70bhp rather than the paltry 22bhp I'm looking for.... [] Ah well, back to the drawing board....

 

[John Sims]

Remapping turbo engines (petrol or deisel) can achieve higher bhp - often in association with increasing the boost pressure ie pushing in more air so that more fuel can be added.

There are possible gains to be made on manufactures maps on normaly aspirated cars however:-

Manufacturers engine mapping is based on various criteria which will include the ability for the car to work in any part of the world (altitude and temperature) and work with all available fuels. Mapping will also take into account the life of the engine, maintaining performance as it wears and not accelerating the deterioration of the engine.

The 944 was heralded as the first "International" car (ie the same car could be sold and used anywhere in the world). However, to achieve this, the car carried several maps within the ECU which could be changed by adding or removing link plugs or or altering the Fuel Quality Switch, all based on the intended global market place.

To get back to the original point - if you change or, alter, part of the design criteria you may obtain more power.

Eg:-

If you have changed another component (exhaust or induction) the engine may breathe better so you may be able to introduce more fuel.

If you only run on high octane fuel you can change the timing to extract the full potential from the fuel, but using lower grade fuel will induce knocking.

A common short term mod is to introduce more fuel which, while potentially providing a an increase in power, may leave unburnt fuel within the cylinder producing bore wash and accelerated engine wear.

Conversely, you might also increase power by reducing the fuel, so that the fuel burns faster, but this will reduce the cooling effect of the fuel and the engine will run much hotter and potentially burn out your exhaust valves.

If your car is in any way non standard, or you elect only to use high octane fuel, a specialist tuner may be able to undertake a map modification bespoke to your car. This can involve significant time on a dyno and significant cost as a result but is unlikely to unleash 70 bhp.

A final note - if you modify the map in any way it will invalidate your insurance if you don't tell your insurers.

And should you think spending a day on a dyno is good fun have a look at Beaky's exhaust manifold In the end you do learn not to cringe as the car is taken to the rev limiter for the umpteen hundredth time that day.

 

[Black80XSA]

DMS Automotive and a few other high end chip companies can extract maybe 15-20bhp extra from the 987 - prices vary from £500 to £1200.

You can buy a resistor on ebay for £5, which fools the signal from the air flow meter, esulting in the ecu delivering more fuel - ie it runs rich.

 

[JCB..]

The 944 was heralded as the first "International" car (ie the same car could be sold and used anywhere in the world).

Cobblers [&:]

What about the Model T, the VW, Jeep or LandRover to name just four??? [8D]

 

[John Sims]

ORIGINAL: JCB..

The 944 was heralded as the first "International" car (ie the same car could be sold and used anywhere in the world).

Cobblers [&:]

What about the Model T, the VW, Jeep or LandRover to name just four??? [8D]

Fair comment [] And it did really only apply to the 1988 model year when European spec cars were strangled to match US emission standards. Perhaps I should have said the first World market modern Porsche, as you will no doubt point out that the 356 is identical throughout the world.

In my defence none of the above noted have ECU's which is what we were talking about. [8|][]