I agree on that, partially. Again, my changes were (if you missed them) from top to bottom - K&N filter in airbox, cleaned MAF sensor, cleaned throttle body, ipd plenum, new oil, new plugs, fabspeed cats, fabspeed mufflers, softronic ECU flash.

I agree about tie down straps factor but from my experience it never gave much of variance plus dyno guys who strap cars one after another everyday most likely do it in pretty much same way, but, for what it`s worth, some variance is unavoidable. Nevertheless, I tried to make it as repeatable as possible, in regard to other factors, naturally, no one can guarantee absolute correctness unless engine is taken off car completely and all runs are done in the lab under controlled parameters.

Nevertheless, it was done to satisfy my curiosity and I have achieved that. How to treat actual dyno data is a matter of personal choice, but one damn thing is for sure - just to ignore it is quite difficult.

Plenum and flash and cats and mufflers do make some recordable difference, even on a C2 car.

 

The real gains on your car come from the Cats, a little from the ECU Flash, the rest don't add HP, they just get the HP to were the original specs are.

The OP didn't say he was adding cats, he only mentioned mufflers (from the Cats back). If he had included cats then I am sure a number of people would have a different opinion.

 

You still do not believe into almighty might of an ipd plenum, do you?



I do not care and not taking mine off to prove anything. Just making fun. What is it between you and that plenum, anyway? Seems like everybody got it now but you. Surrender to majority, North.

 

I think that the Plenum is a very nice looking, well built and finished. I decided not to put anymore mods on my car in the spring, when I decided that I should have a GT3. So no a different Plenum will not make it on to my car. Since you asked, I would have been a plenum owner about 18 months ago, but there was a series of tests conducted and I didn't feel that the results were worth it to me to spend the $ on something that would only provide very small increases in power. I also don't have a flash on this car as I had one on my first 997 and it didn't do anything. I would sooner spend the money on the suspension, some really good tires, and a lot of time at the track. All that track time has really shown me what are the right mods for me and my cars, I am not convinced that adding 20 - 30 hp on these cars is going to make them faster around the track.

 

That is actually totally true. I see major benefit in more linear torque after all those mods with much less fluctuations and overall improved engine 'smoothness' in high revs area.

Set of coilovers and R compound tires would probably cost similar amount of money and most likely would make more track difference, that is correct.
But I do not track it (yet), just auto-x for fun and I am just not sure I even want coilovers for a DD car at all at the moment, it will most likely just complicate my life and make this car more inconvenient in the city. Most likely I will put on GT3 LCA to have -2 camber in front later on, will see.

Nevertheless, having 27 more pounds of torque at 4.5K rpm feels pretty good on a street. Disregarding actual numbers that new torque curve angle between 3.6K and 4.5K rpm - that is the major tuning effect and it was worth every penny spent on it. It feels very good in all regular driving conditions.

 

I already have more torque, which kind of brings us back to the OP's question...I have an S.

As for CO's I have the Bilstein Damptronic's and the are totally livable in the city, and great on the track. I know you don't have PASM, but again, another reason I have a S

 

hmmm guys please no wars here. I was just curious between the regular C2 vs C2S and wonder if I am able to catch it up to a stock C2S ( tip ) Since It's all tips here. I wanted a stick but couldn't find one. 95% of the porsches here are TIP and this is just the way it is over here in Asia. I drive sticks in L.A but that's of course with bigger roads, smoother, and much much better traffic. Even If I want a stick 09+ porsche I think the dealership here wont allow the order unless GT3 or GT2. Or I could do the parallel imports but it is some real hassle. Anyway, I had plenum on my 02 996 3.6 tip and I could really felt the HP and TQ gain right away. I assume this applies to 997 as well?! I just bought softronic and waiting for them to send the file to me. Since my car doesn't have Sports Chorno. What can I say? I hate tiptronic but it is way out of range to get a PDK 997 now. I am just going to enjoy my C2.

 

This is not a war, we are in a discussion. It is all good, this is how we learn more about our cars.

 

My common sense would say - if goal is to 'catch up' - you`ll be better buying 'S' or turbo car to begin with. Rather than my friendly bragging with North proving to him all the pointlessness of overpaying for useless 'S' features
3.8L engine has more capacity. And turbo car has more capacity than supercharged 'S'. And Bugatti puts em all together into ****ter. My advice to you - enjoy what you`ve got, mod the heck out of it for your own fun and donot envy anything else out there as this list is endless.

PS In case if you did not notice - point of that exchange above was partially in the fact that this most recent dyno run I did shows I have way more torque than stock 'S' and more HP as well. So those funny guys now suggest it was a broken dyno and Saturn in a wrong phase so it does not count. He-he.

 

utinkol yeah, enjoy what i got. Even If I get 430 now or 458 now. There will always be a lighter, faster version. Do what I think makes me happy.

 

Based on your mods, whatever your dyno reports may suggest, I am reasonably confident that you do not have more power and torque than a stock S - and certainly not "way more".

 

Ain`t it great to be reasonably confident?

I am quite reasonably confident ESP dyno is accurate and provides correct numbers. My stock car readings were on par with stock C2 reading I could find over the internet so there is no practical reason for me to question my reasonable confidence and assume runs in August to be fine and runs in September to be not.

 

I base my reasonable confidence on your specific mods being relatively low end. Not to say they don't work, and I'm sure they make the car more enjoyable, but it's unlikely that they could indeed produce "way more" than 30hp and 25 lb/ft gains...

 

I'm a little confused by this thread. Utkinpol, I took a look at your dyno graph and they seem reasonable and inline to me. You're showing ~285rwhp whereas stock 997S is ~300rwhp. What am I missing?

 

So, it is just an another empty baseless assumption? Or you have your own personal mods 'ending' scale what you think should matter to outside world more than actual dyno graph from a certified dyno stand?