anyone intalled NHP full exhaust???

[2K3_Boxster_S]

Originally Posted by edevlin

"but I can say that adding headers and an aftermarket exhaust show little, if any, gains on the dyno unless remapping of the DME is involved. Even after remapping, on the examples we have been involved with showed what I would describe as "modest" improvements, but not spectacular jumps. At the end of the day, the owners spent a lot of money, obtained slight improvement,"

Yes, and yes, that is exactly what I have found and I did a lot of mucking around with intakes, custom chips, exhausts and three different mufflers. These are not easy cars to get hp out of, if I recall it cost

Intake 1.2K+
Chip 1.2k+
Full exhaust 4.0K+

This is with a 2000 base boxster and when all the dust settled I picked up between 20-25 hp and lost about 2 mpg highway mileage. I did most of this work a couple of years ago when I had some funds left over by getting a good price on the car.

With short shift kit, lighter overrall car weigh and light flywheel (Yikes!), the car is certainally more responsive and fun to drive, and my exhaust sounds great to me and does not have the resonance issues. But would I do it again knowing what I know now, no way. I would just put on a nice set of Bilstein coilovers, nice sticky 18"wheels and enjoy the ride....

Ed

your talking about a 2.7L 217 hp versus a 2003 3.2L 258 hp which the same exact 3.2L in 2005 puts out 280 hp.

not the same platform.. Apples and Oranges..

[JFP in PA]

Originally Posted by 2K3_Boxster_S

your talking about a 2.7L 217 hp versus a 2003 3.2L 258 hp which the same exact 3.2L in 2005 puts out 280 hp.

not the same platform.. Apples and Oranges..

Unfortunately, in this case the “apples and oranges” behave the same way…………

[edevlin]

"your talking about a 2.7L 217 hp versus a 2003 3.2L 258 hp which the same exact 3.2L in 2005 puts out 280 hp."


My point is that it is very expensive to get extra hp out of our cars with bolt-ons. I am quite aware of the hp of all of the base as well as the S-series boxsters. I picked up 12-14% increase in hp in my 2.7L, many have found similar increases in their S-series engines with bolt-ons.

On a good day, I can put out almost 250 hp to the crank (210 hp to the wheels 15% drivetrail loss is 247 hp to the crank). I have also lightened my car so that it weighs several hundred lbs less than the S-series Boxsters. My car was 2775 lbs stock and I have lightened it to around 2650 lbs, so my little 2.7L is lots of fun to drive, even though it may be an apple, or is it an orange.....

Ed

[2K3_Boxster_S]

Originally Posted by edevlin

"your talking about a 2.7L 217 hp versus a 2003 3.2L 258 hp which the same exact 3.2L in 2005 puts out 280 hp."


My point is that it is very expensive to get extra hp out of our cars with bolt-ons. I am quite aware of the hp of all of the base as well as the S-series boxsters. I picked up 12-14% increase in hp in my 2.7L, many have found similar increases in their S-series engines with bolt-ons.

On a good day, I can put out almost 250 hp to the crank (210 hp to the wheels 15% drivetrail loss is 247 hp to the crank). I have also lightened my car so that it weighs several hundred lbs less than the S-series Boxsters. My car was 2775 lbs stock and I have lightened it to around 2650 lbs, so my little 2.7L is lots of fun to drive, even though it may be an apple, or is it an orange.....

Ed

Excellent, I wasn't knocking on you or your car. 30 hp is what should be expected with IHE. I wouldn't have put $4,000 out for any exhaust though.
that actually puts you 7 hp over the same 2.7L found in the 2005 boxster. good job. sounds fun to drive. hopefully mine will be as well when I am done.

[23109VC]

everytime I go on ebay i see that exhaust system, and the video they have - and I want to buy it. it sounds sooooooooooooooo cool.

does this thing drone like nuts?

on a base 2000, would their FULL system...the one that is $2200 and has everything.... including cats so here in CA, I ccan still pass smog - would it REALLY make ANY power I would feel or is it just going to sound cool and do nothing for speed?

lighter than stock?

[2K3_Boxster_S]

Originally Posted by 23109VC

everytime I go on ebay i see that exhaust system, and the video they have - and I want to buy it. it sounds sooooooooooooooo cool.

does this thing drone like nuts?

on a base 2000, would their FULL system...the one that is $2200 and has everything.... including cats so here in CA, I ccan still pass smog - would it REALLY make ANY power I would feel or is it just going to sound cool and do nothing for speed?

lighter than stock?

1. Not sure about the smog pass. they are 200 cell CATS versus a oem CAT which has about 600 to 800 cells. you may or may not pass. I dont have do worry where I live.

2. wait for the Dyno results, Pre and Post install results will be posted here in the next 2 weeks.

3. they advertise little cabin drone. but I will post those results as well. and I have a little solution for that as well if it is needed.

4. yes, its lighter you are getting rid of the boat anchor in the rear of the car. the system you are talking about with all 4 sport CATS is 20LBS lighter. even lighter if you delete the rear CATS.

stay tuned

[Jake Raby]

The average HP I see from any Boxster S is 223, average TQ is 210.

[Jake Raby]

Hmmn, very interesting.

Take it back after a few hundred miles and see what happens. Where is your AFR data?

Topless,
Around 190 at the wheels on a dyno jet is about the max one can see without induction work. I have gotten 200 on my dynojet with an enhanced induction arrangement, totally discarding the stock 2.5 plenums and runners as well as the throttle body.

Even with a camshaft change (read as 4 different cam sets designed by me) won't make much more power at all (just move the power up) over 190 at the wheels..

My daily driver 2.5 test car is now at 194 with a bone stock exhaust system..