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Discussion Starter · #1 ·
Just wondering if there any options for the 986 Boxster S (specifically 2003) with regard to the Plenum and Throttle Body modification. I contacted Softronic a while ago and they said they don't do one for the 986, so I was wondering:
Is there was another option?
Is it worth it on this engine? - I mean that might be why there isn't anything available as the characteristics of this engine might not make one worthwhile.

I'm shortly going to be doing the following:

Headers (without cats as we only run one set in Australia)- FVD
Cats (FVD)
Intake Mod (Not sure yet, but the shop i'm using claim the one they use is good for 10hp - he's raced Porsches for 40 years, is sending me some dyno sheets so i'm pretty confident in his claims).
Retune

Was thinking with these mods a larger Plenum and Throttle Body would round it off nicely if there was one available.

And before anyone suggests TURBO - would love to, but the cost to get the kit to Australia, getting engineer approval, and then trying to find someone to insure it, would be too much of a hassle at the moment. My car is a daily driver, so legality and insurance is important. When it becomes a weekend car, then I might talk to TPC and see about becoming the first TPC turbo Boxster in Australia :burnout:
 

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Re: Plenum and Throttle Body options

I just installed the IPD plenum on my Cayman... and it definitely gave me more hp, you can find my post with details in the dyno section. I know they make it for the 986 so it's worth looking into. I don't have any experience with the softronic unit so can't comment on that. good luck!
 

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Discussion Starter · #3 ·
I just installed the IPD plenum on my Cayman... and it definitely gave me more hp, you can find my post with details in the dyno section. I know they make it for the 986 so it's worth looking into. I don't have any experience with the softronic unit so can't comment on that. good luck!
Did that include a larger throttle body?
Are you going to get a custom tune to take advantage of that mod?
Did you get it from RSS?

I have read on older posts floating around on different forums that RSS were going to make one for the 986, but when I go on their website and do a search based on a 986, nothing is available.
 

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IPD Part # 86100 for the 03'-05' 3.2L. The throttle body required is Porsche part #99760511501. The kit comes with two additional silicone pieces that attach to the factory 3.2L intake runners which are not required for the 3.4L kits.

I purchased through Road Sport Supply and dealt with Robert Kresher @ 714.545.1046
 

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Discussion Starter · #5 ·
seal986box - thanks very much for that, makes it much easier to follow up. Will also give me the option of going through local suppliers.

Unfortunately these mods are going to have to wait a bit longer - trying to buy a house, final payment on a business I bought is coming due and getting married this year. So money that I haven't earnt yet is already allocated for other things. But it may be a present to myself and the car in 5 or 6 months to celebrate the arrival of spring.
 

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I would be a little careful as I have just had the Cargraphic Plenum and GT3 throttle body fitted to my 987 Boxster S. Although the engine appears to run smoother I have also noticed it looses quite a lot of low-end torque (2-5K rpm). Admittedly it breaths better from 5000rpm to 7000rpm but it has changed the characteristics of the engine which some may not prefer.

I checked the standard plenum when I got back and there is a butterfly inside which I assume is part of the variable intake system. There is no butterfly on the Cargraphic so this would explain the loss of torque plus the larger throttle body. I guess the obvious thing would be to get the engine remapped to take account of the changes but without this I find it unbelievable they quote figures of 20 odd HP for this mod on its own. It is a costly mod to do and to be honest I do not consider its worth the effort. To make clean overtakes now you have to down change whereas you didn't have to do this before.
 

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Just wondering if there any options for the 986 Boxster S (specifically 2003) with regard to the Plenum and Throttle Body modification. I contacted Softronic a while ago and they said they don't do one for the 986, so I was wondering:
Is there was another option?
Is it worth it on this engine? - I mean that might be why there isn't anything available as the characteristics of this engine might not make one worthwhile.

I'm shortly going to be doing the following:

Headers (without cats as we only run one set in Australia)- FVD
Cats (FVD)
Intake Mod (Not sure yet, but the shop i'm using claim the one they use is good for 10hp - he's raced Porsches for 40 years, is sending me some dyno sheets so i'm pretty confident in his claims).
Retune

Was thinking with these mods a larger Plenum and Throttle Body would round it off nicely if there was one available.

And before anyone suggests TURBO - would love to, but the cost to get the kit to Australia, getting engineer approval, and then trying to find someone to insure it, would be too much of a hassle at the moment. My car is a daily driver, so legality and insurance is important. When it becomes a weekend car, then I might talk to TPC and see about becoming the first TPC turbo Boxster in Australia :burnout:
Updates on the installed FVD Brombacher mods bin?
 

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I would be a little careful as I have just had the Cargraphic Plenum and GT3 throttle body fitted to my 987 Boxster S. Although the engine appears to run smoother I have also noticed it looses quite a lot of low-end torque (2-5K rpm). Admittedly it breaths better from 5000rpm to 7000rpm but it has changed the characteristics of the engine which some may not prefer.

I checked the standard plenum when I got back and there is a butterfly inside which I assume is part of the variable intake system. There is no butterfly on the Cargraphic so this would explain the loss of torque plus the larger throttle body. I guess the obvious thing would be to get the engine remapped to take account of the changes but without this I find it unbelievable they quote figures of 20 odd HP for this mod on its own. It is a costly mod to do and to be honest I do not consider its worth the effort. To make clean overtakes now you have to down change whereas you didn't have to do this before.
As per stated on the 986 forum, I am not near able to exercise the flexibility that I had before in fully optimizing newly installed modifications, but from the few times that in which I have punched the pedal, it has left me with a **** eating grin. The power is there, and if I had felt otherwise, I could have returned it. Of all the performance modifications completed to my vehicle, the IPD intake plenum coupled with the 997 75mm throttle body is bar none my utmost favorite with the AASCO LWFW and FVD Brombacher ECU tune trailing shortly behind.

Bear in mind, I have completed nearly every bolt-on in the books and this past week prior to my departure to Mexico for vacation, I was contemplating purchasing camshafts for my vehicle. When it was all said and done, I was halfway towards the price of TPC's non-intercooled turbo system. In summation, when I return I will put a deposit down on the unit and have it installed in September. This is the route I should have taken from the very start of the mod bug. Albeit my 2nd Porsche, you live and you learn! All the best.
 

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Discussion Starter · #10 ·
Updates on the installed FVD Brombacher mods bin?
Due to a shipping delay, I only have the intake and re-tune done at the moment. This alone has made the car more enjoyable to drive - I can feel a bit more urge, better response in the 3k-5k rpm range, and the induction sound is great (although a little bit boomy with the top up - but only on full throttle).

I'm going to have to wait until next week to get the full FVD exhaust on - assuming the effing thing arrives this time. Patience is NOT a virtue i'm known for ;) and these WEEKS of waiting is killing me.

I'll post before and after dyno results.
 

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Due to a shipping delay, I only have the intake and re-tune done at the moment. This alone has made the car more enjoyable to drive - I can feel a bit more urge, better response in the 3k-5k rpm range, and the induction sound is great (although a little bit boomy with the top up - but only on full throttle).

I'm going to have to wait until next week to get the full FVD exhaust on - assuming the effing thing arrives this time. Patience is NOT a virtue i'm known for ;) and these WEEKS of waiting is killing me.

I'll post before and after dyno results.
Congratulations on having the tune and air intake installed thus far, I must admit the ECU tune falls into my top 3 favorite performance modifications. The air intake certainly opens her up more, no doubt about it. I certainly have noticed on the days in which the weather fairs better, the loudness of the exhaust with top down comparable to the top up. It is a discernible difference! Speaking of difference, you will be blown away as to the loudness at wide open throttle with the exhaust installed and the calmness throughout regular driving applications. Patience is not a virtue of mine, I can empathize with you in that respect. With every order made it is sent via next day air. In any regard, please keep me and the rest up on the advances made to your vehicle!
 
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