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

[thstone]

Originally Posted by KRAM36

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

[Topless]

NOS... for about 20 seconds.

[Smallblock454]

Originally Posted by Topless

NOS... for about 20 seconds.

Yes, but 30 Secs to 1 minute with 330-350 HP and complete engine rebuilt after the dyno test.

[KRAM36]

Originally Posted by thstone

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?

[thstone]

Originally Posted by KRAM36

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.

986 Boxster/S | IPD Plenums

[KRAM36]

Originally Posted by thstone

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.

[KRAM36]

Originally Posted by thstone

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

Finally got all my parts in and installed. Just got done with a test drive with the 987 air box, K&N air filter, 76mm TB and 997 Distribution T. Oh my goodness the car pulls sooooo much harder. I bet there is a 20HP gain with the way she pulls. Also have a little done to the exhaust. Car sounds like a beast too.

After all that work I thought I was going to be disappointed, not one bit . It's not just high RPM either, it's all the way through the power band.

I couldn't be happier. :dance:

[CraigM]

Pics!!! Got all my parts but the silicone bits, hopefully going in end of this week. Wanna see your set up!
Mine's the 2.7, so I think I'm fine with the 986 airbox. But from there it will be 996 TB and 997 T. Probably do the K&N filter, I know there's tons of back and forth on them but they seem to do fine unless over-oiled. As per some older threads around here, I got some gold foil for cheap enough to wrap some of it up and keep intake temps down. Might as well if I'm messing with it anyways.

[Dlirium]

Originally Posted by KRAM36

Finally got all my parts in and installed. Just got done with a test drive with the 987 air box, K&N air filter, 76mm TB and 997 Distribution T. Oh my goodness the car pulls sooooo much harder. I bet there is a 20HP gain with the way she pulls. Also have a little done to the exhaust. Car sounds like a beast too.

After all that work I thought I was going to be disappointed, not one bit . It's not just high RPM either, it's all the way through the power band.

I couldn't be happier. :dance:

and this is all w/o a tune?? wow...

[KRAM36]

Originally Posted by CraigM

Pics!!! Got all my parts but the silicone bits, hopefully going in end of this week. Wanna see your set up!
Mine's the 2.7, so I think I'm fine with the 986 airbox. But from there it will be 996 TB and 997 T. Probably do the K&N filter, I know there's tons of back and forth on them but they seem to do fine unless over-oiled. As per some older threads around here, I got some gold foil for cheap enough to wrap some of it up and keep intake temps down. Might as well if I'm messing with it anyways.

I'll get some pics up soon. Right now my back is saying no more leaning over.

Originally Posted by Dlirium

and this is all w/o a tune?? wow...

No tune. I have some favorites twisties I love to run through. I was hitting them so hard I now know I need to get better brakes. Coming out of the corners is just a joy with the way she pulls.

[CraigM]

Hey KRAM36,
Where did you get your silicone couplers, particularly the 90 degree? I read to use a 3.25" to 3" 90 degree reducer, can't seem to find one (silicone intakes.com, etc). Are you using something else?

[KRAM36]

Originally Posted by CraigM

Hey KRAM36,
Where did you get your silicone couplers, particularly the 90 degree? I read to use a 3.25" to 3" 90 degree reducer, can't seem to find one (silicone intakes.com, etc). Are you using something else?

I used this to the TB, never mind what the picture says. The tube is 80mm.

Racing Silicone Hose Elbow Coupler Pipe 3 15" to 3 15" 90 Degree ID 80 mm Black | eBay

I used the end of my stock air pipping and that has the same O/D as the TB, but it is very thin, so I ordered in these, using 2 of them to strengthen the end of the pipping. One of them you will have to sand down a bit (put it in first), then the other one goes right on top of it and seals perfectly to the stock pipping. I also have the plastic welder that TRK mentioned and bonded them to the pipping.

One Set of 4 Hub Centric Rings Size 71 5mm to 75mm | eBay

Plastic Welder, man this thing comes in handy.

80 Watt Iron Plastic Welding Kit TPO TEO PP Rod Mesh Auto Car Welder Repair Kit | eBay

I got the same one from Harbor Freight. If you have a Harbor Freight I would get it from there. They are not of the best quality and if it breaks, just take it back for an exchange.

80 Watt Iron Plastic Welding Kit

I also used this to go from the stock MAF housing to the stock pipping, but since you're using the stock air box, you may want to use a 90° coupler there.

http://www.ebay.com/itm/251554367827

and I also used a 75mm honeycomb air straightener at the MAF housing so the MAF sensor gets a better reading.

http://www.saxonpc.com/100mm-cells-for-100.html

I molded my stock MAF housing into the 987 MAF housing. This keeps the car from running lean and when I'm ready to open up to the 987 MAF housing size, I just unclip the stock MAF house and clip in the 987 MAF housing.

That will wait until I have my exhaust mods done, then I go get a tune done on her.

[CraigM]

Wow, eBay has so much more than I found anywhere else. Thanks, guys.