IPD Plenum - best performance mod?

[jsceash]

Fact is the IPD flows 15% more air than the 997 stock plenum with a 74 mm Throttle-body. The geometry of the stock 986 and 997 "T" does nothing to manage the turbulent caused by the "T" shape. Where the IPD does.

[maytag]

Originally Posted by jsceash

Fact is the IPD flows 15% more air than the 997 stock plenum with a 74 mm

This is FACT?
Can you point me to the independent verification?

15% more air under what conditions?
WOT at 6k? Or, what, exactly?

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[KRAM36]

Originally Posted by maytag

This is FACT?
Can you point me to the independent verification?

15% more air under what conditions?
WOT at 6k? Or, what, exactly?

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Say we give him the benefit of the doubt that at some point the IPD Plenum will flow 15% better, most likely at WOT on a modified 3.2 engine. Add 15% to the cost of the 997 Plenum, that would put the cost at $80.50, so where does this $800 become justifiable? Like I said, what HP do you gain from buying the IPD $800 Plenum over the 997 $70 Plenum? You're surly not going to get 15% more more HP with the IPD Plenum over the 997 Plenum and you're paying 1,045% more for that IPD Plenum. Let that sink in a bit 1,045% more then the 997 Plenum?

BTW: The 997 Plenum has an excellent outer radius on it's Y shape, it's not just a T shape.




Does this radius matter? According to Jake Raby it does.

Originally Posted by Originally Posted by Flat6 Innovations

No, it doesn't.

The short side radius of the IPD is where the trick is. You can't develop an intake component using a shop vac. If you do, you'll never see that what you are doing is hurting performance, or doing absolutely nothing!

With a pitot tube inserted in the intake where the splitter is installed in this photo will give zero, or very, very little velocity on the flow bench. Why? Because the air is pulled to the short side radius.

Yes, I have direct experience with this.

https://rennlist.com/forums/996-forum/944002-alternative-to-ipd-plenum-2.html#post13767949

[Cunningr]

Originally Posted by KRAM36

Say we give him the benefit of the doubt that at some point the IPD Plenum will flow 15% better, most likely at WOT on a modified 3.2 engine. Add 15% to the cost of the 997 Plenum, that would put the cost at $80.50, so where does this $800 become justifiable? Like I said, what HP do you gain from buying the IPD $800 Plenum over the 997 $70 Plenum? You're surly not going to get 15% more more HP with the IPD Plenum over the 997 Plenum and you're paying 1,045% more for that IPD Plenum. Let that sink in a bit 1,045% more then the 997 Plenum?

BTW: The 997 Plenum has an excellent outer radius on it's Y shape, it's not just a T shape.




Does this radius matter? According to Jake Raby it does.



https://rennlist.com/forums/996-forum/944002-alternative-to-ipd-plenum-2.html#post13767949

The plenum alone isn't where your adding hp gain, you have to include a new larger throttle body. I not arguing one is better than the other, because i cant say, but before you start saying $800 you need to read up on what is needed to get the power gain.

The IPD vendor claims power gains in throughout the whole rpm range with most gains in the mid range.
Fabspeed is now selling the ipd plenums as well, another reputable porsche tuner, so that has to say something.

As i pointed out its a matter of opinion, as for worth.

[KRAM36]

Originally Posted by Cunningr

The plenum alone isn't where your adding hp gain, you have to include a new larger throttle body. I not arguing one is better than the other, because i cant say, but before you start saying $800 you need to read up on what is needed to get the power gain.

As i pointed out its a matter of opinion, as for worth.

I need to read up on it? I have installed a full intake system upgrade, so yes I know just installing the 997 Plenum isn't going to give you all the benefits it offers without doing a full intake upgrade. As for the TB, both Plenums are for the larger TB.

I'm not saying the IPD isn't better, it's just not 1,045% price wise better. The HP gain between the two on a stock 3.2 wouldn't even be noticeable. Save yourself some money to pay for the rest of a full intake upgrade. You can get everything needed with the extra $730 saved and have money left over.

[KRAM36]

Originally Posted by Cunningr

Fabspeed is now selling the ipd plenums as well, another reputable porsche tuner, so that has to say something.

Lol, Fabspeed is selling it, so that gives the reason to buy the IPD Plenum?

Fabspeed is selling the older style IPD Plenum and for $1,120, what a joke Fabspeed is.

https://www.fabspeed.com/porsche-986-boxster-ipd-intake-plenum/

[jsceash]

Sorry I knew chiming into this conversation was a wasted effort "I'm out been here before".

[maytag]

Originally Posted by jsceash

Sorry I knew chiming into this conversation was a wasted effort "I'm out been here before".

C'mon...... really?
Because I asked for a little more information on something you said is fact?

I hope you're not suggesting that when you say something, it's above question?

It sounds to me like you've got something of value to add to the conversation, and i'd hate to see you split just because I offended you by asking for some additional information to your very specific claim.

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[Cunningr]

Originally Posted by jsceash

Sorry I knew chiming into this conversation was a wasted effort "I'm out been here before".

For what its worth I appreciated the input, since you actually have one installed!

[Cunningr]

Originally Posted by KRAM36

Lol, Fabspeed is selling it, so that gives the reason to buy the IPD Plenum?

Fabspeed is selling the older style IPD Plenum and for $1,120, what a joke Fabspeed is.

https://www.fabspeed.com/porsche-986-boxster-ipd-intake-plenum/

I am not saying that either, just pointing out that several vendors that seem to have a good review are selling it. Not only fabspeed but fvd, whom i did discuss the pros and cons with.

I only mention the TB because you keep referring to the plenum alone, just for sake of discussion need to clarify you need a throttle body.

As for myself I dont like piece milled mods even if they work, I rather have a mod designed for application.

Not sure why all the sarcasm, but its these small companies do our community a service. Not saying they maybe hype the numbers but they do post dyno readings for what its worth.

[KRAM36]

Originally Posted by Cunningr

I am not saying that either, just pointing out that several vendors that seem to have a good review are selling it. Not only fabspeed but fvd, whom i did discuss the pros and cons with.

I only mention the TB because you keep referring to the plenum alone, just for sake of discussion need to clarify you need a throttle body.

As for myself I dont like piece milled mods even if they work, I rather have a mod designed for application.

Not sure why all the sarcasm, but its these small companies do our community a service. Not saying they maybe hype the numbers but they do post dyno readings for what its worth.

What sarcasm? Fabspeed is a joke with their prices and I'm dead serious. Since you think the number of places a part is sold makes the part worth buying. Well the 997 Plenum can be bought at many more places then the IDP Plenum. I see zero relevance of where you can buy the part making it the part to have. It's only companies trying to make a buck off of hype and in Fabspeed's case, adding another $400 to the price of the part.

It's been 4 years since I installed my full intake setup and it's been a complete joy the entire time to drive and all the parts needed to do the full intake mod cost less then the IDP Plenum alone.

[maytag]

Originally Posted by Cunningr

As for myself I dont like piece milled mods even if they work, I rather have a mod designed for application.

I so totally get this. I'm that way with computers. Gimme a laptop with the bells-n-whistles... don't make me figure-out how to add something to it. My mind just doesn't work that way.

But with cars, on the other hand, I am much more comfortable, and would actually much prefer to assemble my own "kit", and do my own trial-and-error of something new that hasn't been thoroughly fleshed-out yet. That's why I've never owned a Camaro: there's nothing new under the sun that hasn't been done on a Camaro. haha.

But I'm very glad that there are people who support the aftermarket with ready-made kits and products, where someone has already figured-it-all-out. And I don't care what they charge for it. I'm with KRAM, that it's hard to rationalize $800 for something I could do (and have 90% of the benefit) for $75. But for others, that threshold is someplace else.

Plus: you can't argue with how pretty the IPD part is. But it's not very "stealthy" if you want people to not notice any modifications, haha.