987 Airbox-Worth it?

[dguy535]

Originally Posted by BYprodriver

I would say it may be the best mod to do other than exhaust. Install is not easy it's best to remove driver side intake runners.

You’ve built some pretty significant motors for these. Did you use a 986 MAF or the larger diameter 987 one? If it’s worth the additional work for tuning, It seems like a worthwhile mod. Just not sure how to go about it.

[maytag]

Originally Posted by dguy535

.... It seems like a worthwhile mod. Just not sure how to go about it.

Did you follow the link particlewave provided below?

There are many, MANY write ups with excellent instructions on this forum. Hit the search bar, you'll be amazed .

Sent from my SM-G970U using Tapatalk

[dguy535]

I've researched this ad nauseum, and have come to the conclusion that there are a number of butt dynos who have registered gains after tuning, but limited info with regard to the larger MAF from a 987 being used. I've read here and seen videos that suggest that additional tuning with either a 996 tune or VRTuning type software is necessary to make the larger MAF work. As I mentioned before, I don't have access to either of those at the moment, and am not convinced the improvements are worth the cost and difficulty to install. Would love to see some hard data that supports it, or get more feedback from someone who has installed the 987 MAF on what the best course is. I can definitely recognize that the 987 AB is an worthwhile improvement as even Porsche used it on the anniversary edition. I need to make a decision as to how I want to invest in the supporting HW/SW to make it work. My thoughts at the moment, suggest using the 987 AB with tubing to allow for the 986 MAF. Unfortunately, a lot of the threads on this subject are older, and folks like The Radium King who've done a lot of research aren't as active. I was hoping to locate some info that would support either method with good dyno info.

[Nitro V8]

Old thread revival!

I have collected all the parts together to do the 74mm tb conversion on my 2003 facelift s.
74mm tb, 996 plenum, 80mm silicone and Ali tubing, various jubilee clips.
I also have a modified 987 airbox and 987 maf tube and maf.

A few questions to those in the know
1) Will I still get improvement in power by fitting the 74mm tb and 996 plenum but retaining the 986 airbox and maf?
2) If I fit the 987 airbox do I need to fit the 987 maf or will there still be benefit if I retain the 986 maf tube?
3) If I fit the 987 maf does it definitely need a re flash to make it run correctly and not throw a cel?

Thank you

[10/10ths]

……it’s much easier.


Just buy a 2004 “50 Years of the 550 Spyder Edition Boxster S” like I did.

She comes WITH a 987 Airbox.

[NotthatJake]

Originally Posted by Nitro V8

Old thread revival!

I have collected all the parts together to do the 74mm tb conversion on my 2003 facelift s.
74mm tb, 996 plenum, 80mm silicone and Ali tubing, various jubilee clips.
I also have a modified 987 airbox and 987 maf tube and maf.

A few questions to those in the know
1) Will I still get improvement in power by fitting the 74mm tb and 996 plenum but retaining the 986 airbox and maf?
2) If I fit the 987 airbox do I need to fit the 987 maf or will there still be benefit if I retain the 986 maf tube?
3) If I fit the 987 maf does it definitely need a re flash to make it run correctly and not throw a cel?

Thank you

I am new to this so sorry if this is incorrect, but where did you find the 74 mm TB that fits the 986/987 IPD plenum?
I have the original 2.5 tb but am trying to find the upgraded TB and am not having any luck so I am curious if there is a throttle body spacer or adapter that is out there to mate these two? Have you heard of an adapter?

[BYprodriver]

Originally Posted by dguy535

You’ve built some pretty significant motors for these. Did you use a 986 MAF or the larger diameter 987 one? If it’s worth the additional work for tuning, It seems like a worthwhile mod. Just not sure how to go about it.

As listed in my signature, I have a 987 airfilter housing & MAF that has the the same diameter as a 996. This requires reprograming the DME for the larger diameter MAF. This really woke up my 3.6 liter rebuild. On the test drive the 1st time I floored it The induction noise scared me.