Speedart is now advertising an ECU, exhaust, and air intake upgrade worth 31 horsepower for a total of 386 hp!!

 

yeah and it'll shorten your engine life and void your warranty too

 

Not completely true, the only thing that would the warranty would be the ecu...which i'm not even sure if that will....correct me if i'm wrong...

 

There are actually a few ecu options for the 997S that do not void the warranty and are even being installed at some Porsche dealerships. If you need more info, give us a call and ask for Sharky.

 

We have just finished our 997S upgrade.400hp.will be available early next month.

 

I would think the ecu upgrade would be deemed as the reason for the total malfuntion; thereby voiding the entire warranty on the breakdown.

-Chris

 

What about beyond that? How much potential is there in the S motor?

 

Well?

 

400hp is all we are going to as we warrenty the upgrade.I think this is about at the max for reliable hp.

 

Well, MY 997 upgrade offers an ECU upgrade, an intake, and a windshield decal. Good for 500 hp !!

I haven't actually dyno'ed it yet, but I'm sure I can fudge the results to make them look pretty good.
Any suckers, er buyers??

 

Next time you try to be funny PM me first so that I can tell you your sense of humor sucks in private before you embarass yourself.

 

CAF, you are rude and probably a very jealous person!!! F.O.

 

Be nice kiddies........

 

Caf,

Your'e not starting off very well, junior member?does that mean your'e twelve going on thirteen?
Neil is trying to give us info, pay attention, we'll let you know when school is out.

 

Though I don't post here often, this board is far newer than I am to performance or to Porsche. I wouldn't get so weary of claims from tuners if they didn't so often turn out to be unsubstantiated.

Significant hp increases from an ECU upgrade and "intake" (plus-minus an exhaust) are ethereal.

These are the facts that can be supported:

-It's rather easy to extract additional hp from forced induction cars, at the expense of engine longevity. It's your gamble.

-Useful hp increases from these type of bolt-on mods are very suspect on normally aspirated cars. These claims are usually supported by in-house dyno results and testimonials ("throttle response is much improved!", "the top end FEELS much better", "I'm just SURE I'm getting 20 more hp !"). I'm sure you've heard them all before.

-A dyno run on the same engine on the same day can result in some variation even with no mods whatsoever. It's very tempting for some tuners to take the worst pre-mod dyno and the best post-mod dyno and claim an improvement. Very few of these have scientific validity (i.e. , are consistent, reliable, and reproducible from independent sources). Interestingly, the only independent published tests in recent years showed on average either no improvement with ECU modifications, or a DECREASE in performance. In the case of the C&D tests, the only improvements were from tightening of the shift points on automatic transmission cars, and had nothing to do with the engines themselves.

-Unless a dyno is performed as an engine-out test, or done with a wind-tunnel type set-up as used by manufacturers, they really have little validity, even for before and after comparisons. The reasons for this would require pages of explanation, but Steve Dinan's white paper on dyno testing is a good primer. Although written from a BMW tuning perspective, the same principles of dyno testing are applicable across the board. The article is written in a style that non-technical, non-engineers can follow: http://dinancars.com/whitepapersFile.asp?ID=9

In the end, the age old-wisdom still applies: if you're looking to upgrade performance, look to the suspension and the driver first. Of course, it's your money.