Dyno results from mods - 986 Forum - The Community for Porsche Boxster & Cayman Owners

nastyboxster · 05-11-2006, 10:22 AM

Just completed a dyno the other day and the results look pretty good. 247.6rwhp 217lbs of torque. 3 pulls altogether on the same day. My first pull yelled 231rwhp, but I didn't know that I was suppose to "floor the pedal immediately"

I was a bit skeptical at first since the numbers were higher than I expected, but the others in the group said their results were what they expected.

My mods are as follows:

Evo air intake
2nd cat bypass pipes
Borla muffler

I plan to do the powerchip in the next few weeks and I'll dyno again.

BoxsterSbob · 05-11-2006, 10:33 AM

Hi, do you know what the stock numbers are?

many thanks
bob

'04S
BMC
Borla

nastyboxster · 05-11-2006, 10:35 AM

Stock should be between 220-225rwhp and 200lb of torque.

BoxsterSbob · 05-11-2006, 10:39 AM

Nice increase!

Do you think one component has contributed more to the increase?

thanks for the quick reply
bob

MNBoxster · 05-11-2006, 12:22 PM

Hi,

Not to be a Kill-Joy, but without the Stock curves to compare it to, it doesn't mean that much. 247HP at 6200+ RPM is only a Bragging Rights number unless you actually intend to go down the street bouncing off the Limiter.

USABLE Horsepower is what it's all about once you're 3 feet away from the Bar Stool. When compared to the Stock curve, there may not be as much difference as you might think.

Factor in the Cost and you may be on a Fool's Errand. Not saying that you are, but without a comparative curve, there's really no way to tell...

Happy Motoring!... Jim'99

nastyboxster · 05-11-2006, 11:29 PM

Bob

Here are the numbers the manufacturer claims:

Evo air intake +8-10hp
2nd cat bypass +9hp
Borla exhaust - doesn't state but according to other manufacturers 3-5hp.

I think the first 2 yelled the best bang for the buck.

Porschekid · 05-12-2006, 04:25 AM

Good info... Nice to see a comparison between the two.

I bet the chip will make the biggest difference for you. Now I need to see one of these for the 2.7...

clubhead · 05-13-2006, 06:00 AM

NastyBoxster, irregardless, I think it's still an effort to post your dyno results and list your mods. It goes to prove that mods do help to bring the stock BHP up somewhat. With regards to $ per BHP, that's really to each his own. If I can get 8-10bhp across the entire rev range, I'll gladly pay $3k cash!

However, Jim & xclusivecar do have a point in that it makes NO SENSE to compare your after mod dyno figures with another stock car figures. There're many variables that can easily affect 2-3 bhp eg. new plugs, engine oil, humidity, temp, etc. For the benefit of all and to convince yourself that your money is well spent, do a before/after dyno. That way, you can tell which mod helps and which mod actually don't. That's who I found out the GIAC was making my car LOOSE power instead of gaining. I sent it back to get the stock program back and got my money back.

Jim, if one talks about lightening the car by 100lbs, well, that'll affect it's everyday livability won't it. Carpeting removal, passenger seat goes, carbon hood, inner door panels, air-con compressor, fan unit, etc.

nastyboxster · 05-16-2006, 11:40 AM

I plan to do the chip in the next few weeks, so I'll go back to the same place and dyno again to get a true increase with the chip alone. I'll post the results.

One more thing, I was at the track yesterday and the mods made a big difference. I was shifting at near redline and it felt a lot stronger than before.

The 2 mods that I had the most compliments on were my turbo bumper and the sound of the exhaust. Ironically, the 2 mods do not add much performance to the car.

xclusivecar · 05-16-2006, 01:43 PM

So are you going to do dyno runs before the chip and then after the chip on this same day? If not...and I know this will sound picky...but you can't wait weeks to dyno again to get a "true increase". I will be very curious to see before/after runs on the same day using the same machine. Good luck and I hope it works out for you!!

nastyboxster · 05-16-2006, 02:19 PM

I understand that dynos can vary depending on type of dyno, gas, temperture, spark plugs etc., but will it make that much difference if I wait a week before dynoing it?

Question for dyno experts
1. How much of a difference can it vary? (clubhead mentioned 2-3hp)
2. If it's only 2-3hp, does it matter since I won't be able to feel it anyways.?
3. I've seen several Boxster S dynos with no mods and it's between 220-225rwhp. Anyone seen any with below or above it?

ClemsonBoxster · 05-17-2006, 08:23 PM

NastyBoxster, I have a 2001 S Boxster mostly with all the same options as yours. Looking to do some mods and have been recommended locally to with two different exhausts - one place recommends the Fabspeed (Dansk) and one place recommends the Borla. I was leaning toward the Borla Exhaust, Secondary Cat Bypass and Evo like you did. I know the exhaust is going to run me $1,000 installed. Did you get the the Cat Bypass Pipes from Fabspeed? If not, where did you get them?

What did the Bypass Pipes and Evo Intake cost you to install. I know the pricing on those two mods are $900 combined, just curious what the installation ran you?

And in South Carolina we have no state inspections, so no worries about failing emissions.

Thanks.

clubhead · 05-19-2006, 03:26 AM

Quote:

Originally Posted by nastyboxster

...
Question for dyno experts
1. How much of a difference can it vary? (clubhead mentioned 2-3hp)
2. If it's only 2-3hp, does it matter since I won't be able to feel it anyways.?
3. I've seen several Boxster S dynos with no mods and it's between 220-225rwhp. Anyone seen any with below or above it?

Need to qualify I'm no dyno expert but I'll try.

The main concern if you dyno between a period of time can also be attributed to the machine itself. These machines are sensitive equipment and by themselves, will already have a certain amount of variance. This will be excerbated by other elements like intake temp, humidity, car's engine oil temp, new/old plugs, etc.

Now IF the machine owner recalibrated the dyno in between (and you will not necessay know this), the variance would even be greater.

So to be safe, do the before dyno before you plug in the new program. Plug in the new program and go for a 20 mins drive. Then do the dyno again. It's a hassle but it's the only way to satisfy yourself that those gains are mainly due to your new program. The variance can be 2-3bhp but if the gains are 5bhp, you may be getting only 2 bhp increase with the variance taken into account. This is assuming the machine read lower than actual. Aren't you gonna feel ****************ty if you've spent $1k on a program and thought you've only gained 2bhp but actually it's 5bhp? Or vice versa....

alex911s · 05-19-2006, 01:53 PM

Quote:

Originally Posted by nastyboxster

Just completed a dyno the other day and the results look pretty good. 247.6rwhp 217lbs of torque. 3 pulls altogether on the same day. My first pull yelled 231rwhp, but I didn't know that I was suppose to "floor the pedal immediately"

I was a bit skeptical at first since the numbers were higher than I expected, but the others in the group said their results were what they expected.

My mods are as follows:

Evo air intake
2nd cat bypass pipes
Borla muffler

I plan to do the powerchip in the next few weeks and I'll dyno again.

Cool Stuff and Nasty mods,

I have sched, HR springs, evo air intake and the german ebay modified exhaust,LOL I have a credit from giac from my cayenne turbo flash, so I probably be doing that too.. the ecu flash will definitely help especially you already have the intake and exhaust..you'll see big diffetence .. good luck man!!
with these NA engines that's all you could do unless youre thinking of EVOM supercharger

MNBoxster · 05-19-2006, 02:23 PM

Hi,

I'm confused, all this time I thought you were doing the Mods yourself, but I see now that you're paying someone else to do it. That can really get expensive. My personal preference is to have someone else touch my car as little as possible, not just from the $$ standpoint, but then I'm sure it's done right. To each his own...

Happy Motoring!... Jim'99

986Jim · 05-20-2006, 05:12 AM

I installed the EVO intake myself and to be honest it was all quite easy. The only part that I had a problem with is getting the stock air box out. That bolt under the car was hard to get to, eventually I found an easy way to get at it and the rest was cake. I could re-do that install now in two hours start to finish with clean hands and 1 beer consumed.

Other thing is even if the intake is not made for your car it will fit. I bought Clubheads intake and he has a Boxster S. I had to buy some extra silicone to make up a shortfall in the piping of about 4" and thats it, no big deal really. It still fits fine, just has to do some minor adjustments...

clubhead · 05-20-2006, 09:38 AM

Quote:

Originally Posted by alex911s

Cool Stuff and Nasty mods,

...and the german ebay modified exhaust,...

I've been reading about this exhaust which claims to make the Boxster sound like a 996. How true is that? I'm very tempted to get one of these, just that they don't seem to have one for the S readily available.

alex911s · 05-20-2006, 02:14 PM

Quote:

Originally Posted by clubhead

I've been reading about this exhaust which claims to make the Boxster sound like a 996. How true is that? I'm very tempted to get one of these, just that they don't seem to have one for the S readily available.

Hey man,
why dont you wait till i install it.. actually they do have one for the S right away
cause I got mine in 10 days... if you look under the sellers store
for some reason it doesnt comeout just searching boxster.. that;s what i did.
here's the link for all of them

http://stores.ebay.com/OETTLES-TUNING-und-KAROSSERIESHOP

clubhead · 05-21-2006, 06:38 AM

Quote:

Originally Posted by alex911s

Hey man,
why dont you wait till i install it..

Great, let me know the outcome when you've got yours on the car. I'm currently running the Dansk aftermarket muffler and before that, the Tequipment Sports Muffler. I missed the unique sound of the Tequipment but the like the louder exhaust from the Dansk. If only both the sound and volume can be combined.... which is what this muffler seem to be offering.

Adam · 05-21-2006, 06:32 PM

Quote:

Originally Posted by clubhead

I've been reading about this exhaust which claims to make the Boxster sound like a 996. How true is that? I'm very tempted to get one of these, just that they don't seem to have one for the S readily available.

Are you talking about the 996 on the fabspeed site because a stock 996 sounds kindof...I don't know...not too impressive and less aggressive than a 986.