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997S Project 400BHP

Ian W

New member
Hi everyone

I've decided to have some fun modifying my 997S. These cars are crying out for more power as the chassis is so capable! As many of you will be aware, there are a multitude of tuning firms out there offering a plethora of bits and pieces together with claims that vary from 'ummmm...' to 'you've got to be kidding'! So I've decided to assist a UK-based tuner (mostly by allowing them to use my car for development but also with some ideas) to evaluate and test various options and to come up with a real 400BHP package. I'll tell you who the tuner is once we've finalised all the arrangements. My goal in this is to end up with a 400+ BHP 997S and to be able to report back on the modifications and their effectiveness. The tuner's is to be able to offer this package, fully proven on the dyno and with independent magazine performance tests to back it up, to anyone else who's interested.

So what approach will be used to go for the 'Magic 400'? Firstly, there is no intention to look at forced induction - this is a 'naturally aspirated' project. So in the absence of a supercharger, there is no hope of reaching this figure simply with bolt-on bits. There just isn't that amount of gain left in the standard motor and any claims to the contrary really are B/S. The belief is, currently, that the following will likely be required - airbox / filters, bigger throttle body, cams, exhaust manifolds, 200-cell cats and an ECU designed specifically to work with the complete package. Sports silencers would be an option but the standard 997 silencers are not restrictive and should be able to be retained. The standard car will be tested and dyno'd, then the various modifications will be applied to evaluate their effectiveness both separately and in combination. The tuner is hoping to offer the modifications in stages, each of which will add a quantifiable increase in performance over the previous stage. Stage 3 will be the complete package giving you over 400 BHP.

The whole 'Stages' project will be approached without preconceptions as to what should work. For example it isn't currently known whether the best 'bang for buck' for Stage 1 will be intake, exhaust or whatever. Evaluations will be done to ascertain what works and the tuning stages designed to give an effective performance lift with each next stage.

I'm not entirely sure of timescales yet, but there are already a number of parts on order from Porsche Motorsports for evaluation.

I would add that I have no business interest with regard to the tuner concerned - I'm just looking forward to a faster car! They will simply be using my car for development (and I'm incredibly nosey so they'll have to put up with my presence too)!!!. I will report back as things progress.

 
Sounds interesting - especially if it costs less than X51. More for less, that would be nice!

Will they be offering to cover the OPC warrenty if customers take the upgrade in the first 2 years?
 
bearing in mind the warranty issues which are all over this forum and others i would be very vareful that the developers are going to cover any problems-or it will end up costing a lot more than the x51..........[:D]
 
Ian,

Sounds do-able to me but as you say, to find another 50 nags or so on an atmo engine is going to mean some serious hardware changes.

Porsche have already done the work for us with X51 and then reigned in the last few horses through the electronics to ensure longevity in all markets/conditions etc.

We know that there are 10-20 horses missing from X51 on software alone ( See Parr, DMS, Revo etc for details ). Add a cat back and an even less restrictive manifold ( Tubi etc ) and your 400bhp is a no brainer, its there in the first place, they just chose not to let us have it !

Is your tuner doing the development work for free until you find the spec you are happy with ?, could end up very expensive other wise.

Good luck and keep us informed

Yves
 
Interesting, although aftermarket mods will never be as appealing come resale time, as I've found out with alot of my previous cars.
But if its a keeper, then why not!
 
I keep reading reports that OPC won't resale cars with aftermarket parts fitted.. certainly not exhausts anyhow [:'(] well apart from if they did the work.

garyw
 
ORIGINAL: garyw

I keep reading reports that OPC won't resale cars with aftermarket parts fitted.. certainly not exhausts anyhow [:'(] well apart from if they did the work.

garyw

They're a conservative lot are they not !

Gary, can you and Rob make it your mission to get the inside line on aftermarket mods from Porsche in time for our Register day in July ?

I wonder what Geoff T has to say on the subject.

Yves

 
ORIGINAL: YvesD

Ian,

Sounds do-able to me but as you say, to find another 50 nags or so on an atmo engine is going to mean some serious hardware changes.

Porsche have already done the work for us with X51 and then reigned in the last few horses through the electronics to ensure longevity in all markets/conditions etc.

We know that there are 10-20 horses missing from X51 on software alone ( See Parr, DMS, Revo etc for details ). Add a cat back and an even less restrictive manifold ( Tubi etc ) and your 400bhp is a no brainer, its there in the first place, they just chose not to let us have it !

Is your tuner doing the development work for free until you find the spec you are happy with ?, could end up very expensive other wise.

Good luck and keep us informed

Yves

Allegedly some fo the x51's are hitting 400bhp once run in anyway[:D][:D][:D]

Why be conservative go for 420+ and the same power to weight as a Turbo
 
YvesD, I'll get an email sorted out to try and get a request for the official line..
But I'm sure you can already guess the answer....[;)]

apart from the comment of the service guy the other week who commented on the fact that if it was CE marked then all should be fine.

garyw
 
As expected the official line is.. (and as printed in the magazine)

Performance Add-ons

"Members are advised that any modification or the fitting of any non-Porsche accessory may invalidate their warranty" .
 

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