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

[moresquirt]

There is a company local to me that told me they could get these boosted numbers out off my stock 06 Boxster S. But with only changes to timing,fuel and air.No pipes,bolt ons ect.Is this really possible and and if so reliable.Company is engineered Automotive in Concord Ont.Thx

[mikefocke]

Something for nothing seldom happens.

Those are normally numbers only achieved with lots of expensive hardware plus a tune.

Ask for a reference and talk to someone for whom it has been done.

[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.

[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.

[thstone]

20hp is a lot. I'd believe 10-15hp for a tune only.

[KRAM36]

Yes it does. Each mod would give you that HP on it's own, except the tune. Combined would probably be more, but I'm doing this on the low side.


.

[The Radium King]

dude. 100 hp/litre with bolt-ons? porsche only got 106 hp/l with the 996 gt3 rs. 96 hp/l with the m96 x51 with reworked heads, cams and exhaust. that dyno you reference must already have drivetrain loss factored in (or be all out of whack) because it shows the stock engine making 250 hp, which is the oem flywheel value.

[KRAM36]

Originally Posted by The Radium King

dude. 100 hp/litre with bolt-ons? porsche only got 106 hp/l with the 996 gt3 rs. 96 hp/l with the m96 x51 with reworked heads, cams and exhaust. that dyno you reference must already have drivetrain loss factored in (or be all out of whack) because it shows the stock engine making 250 hp, which is the oem flywheel value.

It's also a given Porsche cut the nuts off the Boxster. It's not hard to add 55hp to the Boxster 3.2L engine. I never stated a 100 hp bolt on only increase.

[The Radium King]

Originally Posted by KRAM36

It's also a given Porsche cut the nuts off the Boxster. It's not hard to add 55hp to the Boxster 3.2L engine. I never stated a 100 hp bolt on only increase.

um ... i said 100 hp/litre. ie, divide horsepower by engine displacement. pretty standard way to state the efficacy of your engine. your 318 hp / 3.2 litres is 100 horsepower per litre. porsche could barely get that with race engines of the 996 era, and pretty much couldn't with the m96. 55 hp out of the 3.2 puts you at 307 hp; the 3.4L 996 only made 304 hp, so i doubt you'll be able to get there with .2 less litres.

[KRAM36]

Originally Posted by The Radium King

um ... i said 100 hp/litre. ie, divide horsepower by engine displacement. pretty standard way to state the efficacy of your engine. your 318 hp / 3.2 litres is 100 horsepower per litre. porsche could barely get that with race engines of the 996 era, and pretty much couldn't with the m96. 55 hp out of the 3.2 puts you at 307 hp; the 3.4L 996 only made 304 hp, so i doubt you'll be able to get there with .2 less litres.

How can a chassis dyno machine know the drive train loss on a car? I started a thread to find the drive train loss through a Tiptronic trans Boxster.

http://986forum.com/forums/performance-technical-chat/56594-curious-about-hp-loss-through-drivetrain.html

Only person to give out any real numbers was Jake Raby, but it was for manual cars.

Originally Posted by Jake Raby

I have two engine dynes and a chassis dyno all within 50' of each other. We can pull an developmental engine off the engine dyno and install it into the car the same day, then test it on the chassis dyno. I see 18-22% losses generally from a manual car.

Pay zero attention to the factory power rating, often times they are posted in DIN and not SAE anyway.

So if Jake Raby is seeing a 4% swing on manuals, how is a chassis dyno machine going to know how to accurately calculate drive train loss?

Can you answer that for me? What's the drive train loss on a Tip trans car?

[The Radium King]

Originally Posted by KRAM36

How can a chassis dyno machine know the drive train loss on a car?

you can add a correction factor into a dyno; someone could have easily modified those dyno results with a 1.15 or 1.2 correction factor so that it was reading high. as was previously stated, the only real information you can get from a dyno is change in hp, not absolute numbers. and in all the tuning i have seen of boxsters, i have yet to see anyone bolt on a 50 hp increase. i have seen people brag of 300 hp, but no 50 hp increase. that's why everyone always wants before and after numbers, because absolute numbers mean nothing when it comes to dynos.