Chipped cars ONLY! - 986 Forum - The Community for Porsche Boxster & Cayman Owners

der Geist · 04-04-2007, 05:52 PM

Quote:

Originally Posted by bmussatti

Hi der Geist, I don't want to hijack this thread or take it Off Topic, so I'll delet this if you want just, send me a PM. But I have a question. Is there really a big difference between 91 and 93 octane (2.2%)? Thanks.

Not all all, I think that is what a discussion board is all about. Like most mods in everyday driving you are right-there is really not a whole lot of difference. I doubt if most people would even notice it. My past cars have always seemed to run just a bit better and cleaner on 93 and the Boxster in particular seems to run smoother. Like all mods though I think it will only make a difference under extreme circumstances such as REALLY spirited driving or track/autocrosses. You mentioned 2.2%. My last boss (and mentor) once asked me if I knew the difference between a race horse that won a million dollars a year and one that only won one hundred thousand dollars a year. I thought about it for a second and admitted I did not know. He told me the difference was 1%. I asked how that could be and he replied "because that's all it need to be-just a nose, 1%. So while I know I won't be blowing away any 987 S's, chasing Carreras down the back straights and I will watch Corvettes tail lights pulling away from me at a speed which I could never match I believe that all these 1 & 2 percents add up and can result in a much better driving experience. Not only that but if I come across an unsuspecting 986 I can smoke him!

Just my .02 or was that .08?? Sorry for the long reply!!

I think there may be someone else out there who may have a better understanding of the differences and might explain it more clearly. Anyone???

der Geist · 05-26-2007, 08:10 PM

Here is the dyno run for an '03 base Boxster after exhaust, intake and Revo chip. This is at the rear wheels so HP at the flywheel should be substantially more. All I know is that the butt dyno says "HELL YEAH!!" I didn't get a base dyno from bone stock so if anyone out there ha one for an '03 2.7 I would appreciate you posting it so we can all see the difference and see how HP to $$$ these mods really are.

chaudanova · 05-26-2007, 11:05 PM

Quote:

Originally Posted by der Geist

Here is the dyno run for an '03 base Boxster after exhaust, intake and Revo chip. This is at the rear wheels so HP at the flywheel should be substantially more. All I know is that the butt dyno says "HELL YEAH!!" I didn't get a base dyno from bone stock so if anyone out there ha one for an '03 2.7 I would appreciate you posting it so we can all see the difference and see how HP to $$$ these mods really are.

Hey der Geist, I don't have a '03 2.7, but mine is a '02 2.7, which should be a little less powerful than the '03 based on Porsche's factory ratings for the change in that year.

Here is my baseline dyno. My only mod included is a "desnorkling".

2000SoCalBoxsterS · 05-27-2007, 05:37 AM

For what it's worth my local Porsche tuner race shop will do a free 5 hour REVO flash to see if you like it before paying for it. I'm sure any REVO dealer will do this. I guess REVO is so confident about their product that they allow for this free trial. But I've also heard that GIAC ? Makes a better performance chip. I haven't researched them yet so I can't say which is better.

steve00s · 05-30-2007, 03:15 PM

I'm getting the GIAC tuning tomorrow. Since I cannot dyno the results I was trying to think of some other subjective way to measure it. Maybe a few baseline timed dashes today and comparing that with some times tomorrow. Any ideas on the best way to minimize driver factor, i.e., rolling start timed 1/8th mile or time from 60mph to 80mph on the freeway?

der Geist · 05-30-2007, 03:45 PM

I think the only way to tell the difference (if any) would be with a dyno run. I don't think that chipping the car has really added much horsepower but it certainly has added to the drivability of the car. I have the throttle response up to "9" now and I can adjust the air flow and most importantly the timing. The torque line is much flatter now. I think you will enjoy it. Please post your impressions after it's done no matter what. I was really tempted to go with GIAC too but in the end the little programming box got me. I think GIAC may be offering that as well. You may want to check into it. Good luck with the reproramming!

steve00s · 06-01-2007, 07:57 AM

Well I had the GIAC programming done yesterday. It was $795 + $80 labor + tax totaled $950. I was told that there is a certain amount of "adaptive learning" that takes place for a few days as the ECU adjusts. Was told to drive it hard for a few days before drawing any conclusions. Initially, I did not feel much difference certainly not like I have experienced with chips in other vehicles that have been very noticeable. This morning it did feel a bit stronger. About the difference between having a passenger (200 pounds) in the car versus solo. The temperature was also cooler this morning so that could have contributed. I'll continue to "teach" it for a few days before making up my mind whether it was worth the money. Either way, I had to try chipping it to satisfy my own curiousity.