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Old 05-04-2015, 05:09 PM   #1
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20 HP and 24 lbs torque with fuel,air,timing possible?

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
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Old 05-05-2015, 12:03 PM   #2
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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.
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Old 05-05-2015, 12:39 PM   #3
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I think the consensus over the years has been that it takes quite a bit to squeeze more out of these engines.
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Old 05-05-2015, 03:05 PM   #4
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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.
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Old 05-05-2015, 03:22 PM   #5
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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.
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Old 05-05-2015, 04:00 PM   #6
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20hp is a lot. I'd believe 10-15hp for a tune only.
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Old 05-05-2015, 04:37 PM   #7
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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.

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Old 05-05-2015, 05:03 PM   #8
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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.
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Old 05-05-2015, 05:28 PM   #9
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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.
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Old 05-05-2015, 06:50 PM   #10
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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
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Old 05-05-2015, 07:12 PM   #11
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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.


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Old 05-05-2015, 07:14 PM   #12
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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.
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Old 05-05-2015, 07:22 PM   #13
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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.
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Old 05-05-2015, 07:48 PM   #14
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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.
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Old 05-05-2015, 07:52 PM   #15
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What have you guys been smoking?

lol
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Old 05-05-2015, 08:05 PM   #16
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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."
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Old 05-05-2015, 08:21 PM   #17
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Show us your before / after detailed dyno chart please.....

If you don't have one, its just guesswork.
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Old 05-05-2015, 08:31 PM   #18
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Show us your before / after detailed dyno chart please.....

If you don't have one, its just guesswork.
I can not as I never had a dyno done on the car in stock form.

jsceash stated he got 20 hp recorded on his 2.7L with these mods.

smooth 3-1/4" inlet pipe upgrade plenum and 74mm throttle body stock MAF stock air box desnorkled

I know my car is pulling 20 hp or more harder then before. I did a full intake upgrade (see my signature) compared to his and on a 3.2L engine.
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Old 05-05-2015, 09:45 PM   #19
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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.
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Old 05-06-2015, 01:11 AM   #20
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Didn't the RS Boxsters state they had 315HP? Are they 3.4ltrs?
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