is it worth fitting a performance chip to a 997

[baron bashoneov]

just wondering and if so, what is bhp addition

[gmk666]

DMS Automotive ads claim Carrera to 348bhp and Carrera S to 376+.

Is an extra 26bhp worth it? Dunno.

[big.bad.wolfie]

gmk666 said:

DMS Automotive ads claim Carrera to 348bhp and Carrera S to 376+. Is an extra 26bhp worth it? Dunno.

Can they prove it? With a replaced exhaust, intake etc etc it might get close.

[DanH]

I'm always sceptical of claimed power increases on NA cars without any further mods to induction, exhaust, engine. If it was that easy, why didn't Porsche do it?

(chipping a turbo obviously works though)

[leosayer]

DanH said:

(chipping a turbo obviously works though)

So why didn't Porsche do that then?

[silver993tt]

leosayer said:

DanH said: (chipping a turbo obviously works though) So why didn't Porsche do that then?

993tt - Factory chip upgrade 430bhp
993tt - Factory chip upgrade + larger turbos & extra oil cooler 450bhp
996tt - X50 option, Factory chip upgrade + larger turbos & extra oil cooler 450bhp
996gt2 - Factory chip upgrade + larger turbos & extra oil cooler 480bhp + other mods

[DanH]

leosayer said:

DanH said: (chipping a turbo obviously works though) So why didn't Porsche do that then?

Because it puts more stress on the engine and they have struck a balance between reliability and power. It is easy to make a turbo more powerful by just upping the boost and fueling. With an NA its bloody hard & expensive.

Actually had a chat with Gavan Kershaw of Lotus about chips on NA engines and he was very dismissive.

[Taaffy]

And not forgetting your warranty ..........do you really want to shell out upwards of 6k for a new engine if it pops and warranty won't cover it as you have chipped it .....and all for a paltry 26bhp.

>> Edited by Taaffy on Friday 27th January 09:50

[nervous]

if you want you're car to feel immeasurably faster drive something rubbish and slow for a week.

[mikeg996]

nice one, Nervous

[Adam B]

DanH said:

Because it puts more stress on the engine and they have struck a balance between reliability and power.

wish I could agree however I reckon power is decided by the marketing dept at Porsche these days rather than the engineers!

[DanH]

Adam B said:

DanH said: Because it puts more stress on the engine and they have struck a balance between reliability and power. wish I could agree however I reckon power is decided by the marketing dept at Porsche these days rather than the engineers!

Surely the accountants then swoop and arrive at the minimum spec parts to then support that power?

As mentioned on the other thread about turbos, it's fashionable these days to have very flat torque curves on turbos and limited boost, all to improve drivability, I guess that makes it easy to unflatten it a bit

[anonymous-user]

leosayer said:

DanH said: (chipping a turbo obviously works though) So why didn't Porsche do that then?

there's room in the standard map to run more boost in counries with decent high octane fuel available, porsche has to set them up for the worst case? just a guess

[hulio julio]

What about the factory power increase for the 997? whats the difference between the DMS upgrade and the factory tweeks.

>> Edited by hulio julio on Friday 27th January 17:00

[gmk666]

hulio julio said:

What about the factory power increase for the 997?

Don't know how much these chips cost, but I bet they're less than the Powerkit. Another 26bhp? Certainly sir, that will be £8251.

[Taaffy]

Yeh but it is covered under the Porsche warranty whereas the DMS upgrade is not ......a big chance to take with a 70k sportscar.

[Porsche Boxster]

francisb said:

leosayer said: [quote=DanH](chipping a turbo obviously works though) So why didn't Porsche do that then?

there's room in the standard map to run more boost in counries with decent high octane fuel available, porsche has to set them up for the worst case? just a guess[/quoteyouralmost right it's all to do with octane and servicing..because cars are sold in alot of different countries the manufacturers choose a mid range trade off between max power curve and min power curve, also if the car isn't serviced on time it won't effect the engine as much in respect of wear and tear....I've just spoken to Superchips about my car and that is the answer they gave me...also rechippin a car will not damage it because in most cases the fuel consumption and smoother running can make the engine last longer, because you have more torque it takes less fuel to reach the desired speed, so less wear overall<<,and no quotin me about rechippin not damaging the car I'm an IT consultant not a race tuner lol hope this helps

[aasc]

As an IT consultant you're possibly familiar with 'testing' - consider the amount of resource expended by the likes of Porsche in testing their 'chip settings'. Compare this to so-called chip companies who offer a chip for pretty much every model under the sun - how much testing goes on there...

[Porsche Boxster]

Porsche have tested their chips and their engines thats why the choose a mid way point in the curve for the reasons ive already stated