Glad you are happy.

They did a fantastic job on mine. The guy knows his stuff on Porsche.

He spent a long time on mine and I watched him move numbers about on the lap top then do another run repeatedly.

I am not up enough on engine magagment to say whether thats a re map or pushed timing. I will leave that to you brainy guys

What I do know is I was very happy with the results especially as he completely and I do mean completely sorted the stalling issue I was having due to the LWF. Top bloke

The power increase was just a bonus.

 

Pesty, tell Loren I cant be arsed to reply to him.

 

 

I write this stuff for a living. Been doing it for thirty plus years! (not on cars) played with many microprocessors and microcontrollers. Having seen many systems from concept to final product and seen the amount of testing, adjustment and after sales support find it hard to believe that Porsche haven't managed to optimise the code they have put into production as being the best compromise based on their huge budget and understanding of the hardware they are controlling. Call me old-fashioned but given the full knowledge of all the parameters I'd be very surprised if there weren't compromises being made with any of these 'performance chips'. I stand to be corrected of course...

 

oh i'm sure there is, any extra power comes at the cost of engine lifetime.

 

Not necessarily true. Agree that traditional approaches increase cylinder pressure or maintain the same pressure at increased rpm to gain power, however additional power can also be found from improvements in volumetric, combustion & mechanical efficiency and these gains would probably increase the life of the engine.

 

dont believe you, guess you'll have to give me a motec to try lol

propper mapping, like what you do with motec wont be detrimental, i was referring to most off the shelf chips - i'd have thought they were less than ideal?

I dont know, its not really my bag, ask me about acoustics, much more my thing

 

Engine lifetime is all relative; Geoffery has posted he pulled his engine aprt after 100 hours and it was still servicable for racing and if I get 100 hours out of mine I'd be satisified. That's the best part of 5yrs track time for me. Even if the the ( next) rebuild was £10k I'd consider that value. Prior to it's last rebuild the engine had 50k road miles and 100+ trackdays on it with all the tracdays on a MAF/chip conversion and it was still making 300hp before the rebuild.

No doubt the engine wears less at Porsche spec and cost less but.....

 

"Call me old-fashioned but given the full knowledge of all the parameters I'd be very surprised if there weren't compromises being made with any of these 'performance chips'."

Exactly!

"however additional power can also be found from improvements in volumetric, combustion & mechanical efficiency and these gains would probably increase the life of the engine."

True, but the issue was with a fully stock 964 engine & OEM engine management system.

 

Where are you coming from here Loren?

Is it me misunderstanding you, or are you saying that everyone that's had there stock engine improved by having a new chip fitted and a re-map can't be seeing the improvement they are reporting?

Do you think they are all imagining it?

 

Why does it work? You should not fiddle with engine controls unless the injectors are clean, valves adjusted and fresh spark plugs are at factory-specified gap. Maintenance on these items is done first, or I have an even greater credibility gap. The owner forgets the prior butt-dyno calibration while the car is in the shop. It really does run smoother after a proper valve adjustment and new plugs. Power increase? Real, but small, and due to the maintenance work. Save your money on the re-map. I have from credible sources that the factory did not leave room for safe power upgrades in the factory settings.

 

All my previous cars have had a re-map of sum form or another, with very different results, a turbo car has the greatest improvments (s4 audi-265-320bhp) proved with another rollin road! My old vr only gained 4-5bhp, a waste ov money imo.
But my porsche is better, drives smoother, erm feels a little more modern under accelaration, diffacult to explain, i too my car for a re-map to sort the poor idle issues not for extra power, the extra 20 odd hp isnt goin to pull your skin off.
But my car does drive a little better, IMO.
As for engine life, its a 19 year old car on its original motor and goes fine. I dont think a little more power is goin to change how long it lasts, more like how its drivin will decide how long it lasts.

 

Exactly my point. You do not need a re-map to fix the idle. Every 964 idles and runs great until something wears out, gets dirty, or breaks. You got that fixed, and the car runs better. Absent other modifications, tweaking the 964 engine controls will not provide a safe 2 HP gain, let alone the 26 HP (10% increase!) claimed. You need to pump more air through the engine to get more power. You can do that with a rev limit increase, which eats safety margin. 964 timing is already so agressive it needs knock sensors, so no help there. Want power? Increase the air flow with better intake and exhaust, or add displacement. The magic bullet is to force the air in. I want a supercharger!

 

"You need to pump more air through the engine to get more power. You can do that with a rev limit increase, which eats safety margin. 964 timing is already so agressive it needs knock sensors, so no help there."

Well said! It's that simple, but some still can't avoid the being 'sucked-in'
by the hyperbole.