20 HP and 24 lbs torque with fuel,air,timing possible?

[clickman]

I think the consensus over the years has been that it takes quite a bit to squeeze more out of these engines.

[jsceash]

You can get some gain with a tune I believe 20 HP maybe a little more than possible. Mostly a tune would be done to optimize some mechanical enhancement. Like a exhaust or intake mod.

[Jamesp]

Unlikely, More likely is they want your money. Do a prove it then pay deal. A pre dyno, and post dyno comparison. No 20 horsepower gain / 24 ft lbs torque gain, no money exchange. They'll run like scalded dogs.

[KRAM36]

Originally Posted by clickman

I think the consensus over the years has been that it takes quite a bit to squeeze more out of these engines.

It takes the right combination of parts to get more power out of these engines. On a 2003 Boxster S with a Tiptronic trans I believe 313 HP can be obtained possibly more with no internal mods to the engine itself, a manual a little more if you're willing to go catless. Not cheap to get there, but it can be done.

Example: Boxster S Manual, not sure what year it was.

Mods: Stainless silencer (muffler) and manifolds (headers) - K&N panel - 75mm throttle body - custom 83mm intake - custom remap - MDS underdrive pulley.

Got a dyno of 271.9 HP add in 18% drive train loss = 320.84 HP. If he had done a complete air intake upgrade, at the least would be an extra 5 HP and would be 325 HP.

[Jamesp]

Originally Posted by KRAM36

It takes the right combination of parts to get more power out of these engines. On a 2003 Boxster S with a Tiptronic trans I believe 313 HP can be obtained with no internal mods to the engine itself, a manual a little more if you're willing to go catless. Not cheap to get there, but it can be done.

So what is the list of mods? I have an 03.

[KRAM36]

Originally Posted by Jamesp

So what is the list of mods? I have an 03.

Intake: +20hp to 25hp depending if you go full intake mod.
Exhaust: +15hp cats on headers, cat delete pipes and a proper muffler.
UDP: +5hp
Tune: +15hp

On the low side 55hp increase the 2003 Boxster S 258hp = 313hp.

[geetee]

Originally Posted by KRAM36

Intake: +20hp to 25hp depending if you go full intake mod.
Exhaust: +15hp cats on headers, cat delete pipes and a proper muffler.
UDP: +5hp
Tune: +15hp

On the low side 55hp increase the 2003 Boxster S 258hp = 313hp.

???What? You can't add hp by each mod. It doesn't work that way

[thstone]

Originally Posted by KRAM36

Got a dyno of 271.9 HP add in 18% drive train loss = 320.84 HP. If he had done a complete air intake upgrade, at the least would be an extra 5 HP and would be 325 HP.

The best way to interpret dyno data is by comparison, not by absolute numbers. Thus, my takeaway is that the mods added a much more believable 22hp.

As Radium pointed out, the absolute values of 250hp and 271hp are questionable and simply adding 18% to the measured value of 271hp is even more questionable.

[healthservices]

What have you guys been smoking?

lol

[KRAM36]

Originally Posted by thstone

The best way to interpret dyno data is by comparison, not by absolute numbers. Thus, my takeaway is that the mods added a much more believable 22hp.

As Radium pointed out, the absolute values of 250hp and 271hp are questionable and simply adding 18% to the measured value of 271hp is even more questionable.

I got 20HP at the least out of my intake upgrade only. Another member stated he got 20 hp on a

"2.7 with an smooth 3-1/4" inlet pipe upgrade plenum and 74mm throttle body stock MAF stock air box desnorkled. My recorded improvement is 19-20 HP."

[j.fro]

I remember seeing this and being surprised. I've got the same setup, plus a bit more and dynoed at 244rwhp.
IMHO, 300 FWHP is about the best you'll get from bolt-ons with the 3.2.
I do not think the original poster's question is possible without other work.

Originally Posted by KRAM36

It takes the right combination of parts to get more power out of these engines. On a 2003 Boxster S with a Tiptronic trans I believe 313 HP can be obtained possibly more with no internal mods to the engine itself, a manual a little more if you're willing to go catless. Not cheap to get there, but it can be done.

Example: Boxster S Manual, not sure what year it was.

Mods: Stainless silencer (muffler) and manifolds (headers) - K&N panel - 75mm throttle body - custom 83mm intake - custom remap - MDS underdrive pulley.

Got a dyno of 271.9 HP add in 18% drive train loss = 320.84 HP. If he had done a complete air intake upgrade, at the least would be an extra 5 HP and would be 325 HP.

[KRAM36]

Originally Posted by j.fro

I remember seeing this and being surprised. I've got the same setup, plus a bit more and dynoed at 244rwhp.
IMHO, 300 FWHP is about the best you'll get from bolt-ons with the 3.2.
I do not think the original poster's question is possible without other work.

Clue me in what you mean by FWHP? Never mind flywheel horse power. I always thought that was called bhp?

Worse case scenario of your car having a 22% drive train loss (per Jake's post), you have 297.68bhp, that's a 47.68hp increase. Your car has a 7.2 dme, my car has a 7.8 dme, might be some benefit there? The engine are a bit different unless you put a 2003 or newer engine in your car, your car from factory had 250bhp, mine has 258bhp.