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Old 03-06-2015, 06:36 PM   #1
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Is it possible to get 330 HP from a 2003 3.2L Engine?

Is it possible to get 330 HP from a 2003 3.2L Engine?

I know that's pretty high, but is it possible?
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Old 03-06-2015, 07:04 PM   #2
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Tear the engine down totally send the cylinder halves to LN Engineering for a sleeve upgrade to 3.8. Upgrade the rod. Buy 987 air box and 90MM MAF 74 MM Throttle body and 996 tune.
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Old 03-06-2015, 07:45 PM   #3
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Leaving the engine at 3.2L?
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Old 03-06-2015, 09:03 PM   #4
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Tear the engine down totally send the cylinder halves to LN Engineering for a sleeve upgrade to 3.8. Upgrade the rod. Buy 987 air box and 90MM MAF 74 MM Throttle body and 996 tune.
What he said and bring lots of $$$.
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Old 03-06-2015, 10:56 PM   #5
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Hi,

steel sleeves have some disadvantages, because of the open deck engine design and the aluminium block.

If you rebuildt the engine and have the opportuninity to change internal components you can add a 2 KKK turbo chargers. Than the 3.2 should be able to reach realistic 330 HP and more. For example Gemballa put out 350 HP and 450 Nm out of the 3.2 engine with a Bi-Turbo conversion. This engine also had sport cats and reached Euro 3 emission controls.

As a non aspirated engine it might be possible by removing cats completely and use a lot of expensive components so you can raise the rev limit around 1.000 to 1.500 RPMs. Think the stock block and crankshaft can handle that, but there are a lot of components that have to be improved, lightend and optimized. Cooling has to be optimized. Also you will need an individual ecu remapping… i'm not shure if you will get real 330 HP. 300+ HP should be realsitic.

TechArt offered a 3.6 litre upgrade and reached 325 HP and 375 Nm with full emission controls able engines.
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Old 03-06-2015, 11:17 PM   #6
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So leaving the engine stock and modifying the intake and exhaust along with a tune, you can't get another 72 HP out of it?
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Old 03-07-2015, 02:17 AM   #7
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I would say no. But it depends on how long the engine should last. If you add NOS injection and use very high octane fuel, maybe you can get 330-350 HP out of it - for 5-10 minutes.
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Old 03-07-2015, 02:26 AM   #8
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Anything is possible but how much do you want to spend? I did simple intake and exhaust mods and a remap and dyno'd 20-25bhp more. I did it on a budget and for a bit of fun rather than ultimate numbers but you are dreaming if you think you can triple that extra output by doing the same sort of mods. On the same dyno my 550 already makes more than those numbers of my old car from exhaust mods only with 100 cell cats, sports manifolds and modified exhaust (not that this adds any power, done for the sound).
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Old 03-07-2015, 08:35 AM   #9
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Horsepower potential is somewhat independant of displacement size, as higher RPMs provide additional airflow "as a replacement for displacement". All you have to do is supply ideal amount of fuel at the right time & you produce HP. Problem is torque is what gets you to higher rpm's quickly & this is where there's no replacement for displacement!
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Old 03-07-2015, 10:10 AM   #10
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So leaving the engine stock and modifying the intake and exhaust along with a tune, you can't get another 72 HP out of it?
72hp? Realistically, if everything is done right, you might get 35hp (and 50% of the 35hp will be at >5000 rpm).

Intake: +5hp
Exhaust: +15hp (near redline)
Tune: +15hp
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Old 03-07-2015, 11:12 AM   #11
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NOS... for about 20 seconds.
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Old 03-07-2015, 12:03 PM   #12
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Flat6 gets 300+ but that is with darn near everything in the engine replaced with a strengthened part and a big displacement increase. Takes some time, shipping and more $$$ than twice what your car is worth. Go look at their site and their descriptions of their various engines and you'll get a hint of what it takes.

Can you get to 300+ for a reasonable amount of cash and still have a driveable, reliable engine that will last for 100k miles and 10 years? Or are your mods going to make the car so peaky that it will be a pain to drive in traffic, overheat, use ridiculous amounts of gas and flunk smog inspection?

This question has been asked over and over. And there is no cheap easy way it has ever been answered or we'd all be doing it. Bolt-ons won't do it, it takes some serious engineering.
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Old 03-07-2015, 12:14 PM   #13
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NOS... for about 20 seconds.
Yes, but 30 Secs to 1 minute with 330-350 HP and complete engine rebuilt after the dyno test.
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Old 03-08-2015, 04:35 PM   #14
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Originally Posted by thstone View Post
72hp? Realistically, if everything is done right, you might get 35hp (and 50% of the 35hp will be at >5000 rpm).

Intake: +5hp
Exhaust: +15hp (near redline)
Tune: +15hp
So a 987 air box with K&N air filter, 76mm TB and 997 Distribution T is only going to net me 5HP?
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Old 03-08-2015, 07:09 PM   #15
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So a 987 air box with K&N air filter, 76mm TB and 997 Distribution T is only going to net me 5HP?
Based on my experience testing mods myself on a dyno, I discount what advertisers claim.

Here is the data from IPD's website. They claim a 15hp increase for $1,125. My thinking is that 15hp is the ABSOLUTE best that someone could ever hope to achieve with their system. Who knows how many changes, pulls, and waiting for the right conditions they did just to get 15hp.

To my somewhat skeptical mind, that means more like 5-10hp in the real world and most of it will come at the very high end of the RPM range.

Boxster's (and most Porsche's) breath pretty well (in and out) straight from the factory. The low hanging fruit has already been picked. Thus, most mod's to intake and exhaust only yield small marginal increases. This is why the only way to add big hp is through forced injection or more displacement.

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Old 03-08-2015, 07:27 PM   #16
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Based on my experience testing mods myself on a dyno, I discount what advertisers claim.

Here is the data from IPD's website. They claim a 15hp increase for $1,125. My thinking is that 15hp is the ABSOLUTE best that someone could ever hope to achieve with their system. Who knows how many changes, pulls, and waiting for the right conditions they did just to get 15hp.

To my somewhat skeptical mind, that means more like 5-10hp in the real world and most of it will come at the very high end of the RPM range.

Boxster's (and most Porsche's) breath pretty well (in and out) straight from the factory. The low hanging fruit has already been picked. Thus, most mod's to intake and exhaust only yield small marginal increases. This is why the only way to add big hp is through forced injection or more displacement.

986 Boxster/S | IPD Plenums

Those numbers are based off of using the stock 986 air box. I don't think 15HP is out of reach and from what I have read the larger TB helps in the lower rpm range. Look at the Torque numbers. That's what gets you off the line and into the increased HP range.

So being on the generous side. Using your other numbers.

Intake: +15hp
Exhaust: +15hp (near redline)
Tune: +15hp

That's a 45HP increase. That puts the car into the 303HP range.
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Old 03-08-2015, 09:03 PM   #17
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With disassembling, or without?

With disassembly I can turn that engine into a 4 liter and get over 400HP from it. Its routine around here.
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Old 03-08-2015, 09:24 PM   #18
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With disassembling, or without?

With disassembly I can turn that engine into a 4 liter and get over 400HP from it. Its routine around here.
You're making my mouth water. Can a Tiptronic trans handle that much power?
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Old 03-09-2015, 06:47 AM   #19
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With disassembling, or without?

With disassembly I can turn that engine into a 4 liter and get over 400HP from it. Its routine around here.
You left out taking a loan out against your home
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Old 03-09-2015, 07:20 PM   #20
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625hp from 2.6l. There is a lot of horsepower hiding under the sofa. You just have to coax it out of there.

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