Intake plenum and 911 throttle body

[mavis.d]

So back from holiday and time to crack on with the upgrade. My plenum arrived the day went away which was a bit frustrating. I'm just waiting for the pipe and 90 degree bends to connect it all up. As my car is used 3/4 days a week I have decided not to swap to the 987 air box due to time constraints. Planning to do the work on Thursday (day off)
Looking forward to reporting back with some pics

[Ben006]

If you don't use the 987 airbox, you should try the K&N drop in filter! I'm very impressed at the difference it made!

[Ben006]

So, guys!

Today we met with ChrisZenithBlue for an autocross event, and since we have both 2.7L base models, we did a bit of comparison.

And I can confirm that my setup makes a difference! especially down low, the car just goes, and the power delivery is smoother!
I do run thicker oil than he does (15w50 vs 0w40)!

Now I really want to see the dyno results to put a figure on this difference!


And by the way, I would have never thought that a boxster would make such a good drift car ^^

[jb92563]

Originally Posted by Ben006

And by the way, I would have never thought that a boxster would make such a good drift car ^^

Haaa haaa, that explains all the knocked over cones? !

[eddy]

finally got the silicone reducer i ordered. with luck, the car will be up and going sometime tonight.

[Ben006]

Originally Posted by eddy

finally got the silicone reducer i ordered. with luck, the car will be up and going sometime tonight.

go go go

Haaa haaa, that explains all the knocked over cones? !

I actually haven't knocked a single cone

[madmodz]

Heres some pics of my setup. I'm using a design-tek FAI. Its also sold as a agency intake and I'm sure other names.





I drove the car without an intake around the block and it drove good. I then did a plug change and tried to drive it today. The car will not idle past 2000 and I pulled these codes.





Only difference is a plug change, fai mounted. Got to research these codes. Anybody have any ideals?

[Gelbster]

Maybe you accidentally knocked off some electrical connections? If not ,note the codes, clear them and see if they return as Pending Codes after a few drives?

[The Radium King]

check your aftermarket intake - if wedged in there, it might be pressing on the wiring to an injector (#6 - closest to the back on the driver side) and causing an intermittent electrical connection.

[Ben006]

If it happened after the plug change, recheck everything you did.

I hope it's not much!


I see that you used the piece of hose that I provided! how did it fit? Did the coil prevented it from collapsing? How did you get it straight on the AOS ?

[madmodz]

Originally Posted by Ben006

If it happened after the plug change, recheck everything you did.

I hope it's not much!


I see that you used the piece of hose that I provided! how did it fit? Did the coil prevented it from collapsing? How did you get it straight on the AOS ?

I'm too burned out to work on her tonight. The aos hose was a little tight, but it fit with no issues. I did use the 15 degree 3" pipe that I cut down quite a bit. I also cut the elbow coming from the tb to give less of an angle. It turns to sharply in.

[eddy]

got mine in. cut the aos pipe just a touch because i couldnt get it unkinked. went for a drive and everything seems to be working great! it was wet out so i really couldn't push it. sounds great, though! i started a write up but it's time for bed. really excited that it came together! i'll be driving it for the next several days to let the ECU learn it.

[Ben006]

If the AOS hose is too long you can always cut it, but I was more afraid of the other way round, because if it's too short... it's just too short ^^

The 3" pipes needs to be trimmed a bit to make it easier to fit, along with the elbow, like you did.
I mentioned it I think? I need to make a better first post like I just did for the shifters... but now, It's dinner time!

[eddy]

Wow Ben.

I put 200 miles on the car today. Pulls much harder across the rpm range. I'm thrilled with the results. The quality of the piece is clear to see when you look at it, but the proof is in the pudding, and I have to say the pudding is pretty good.

I am headed back to the dyno (hopefully next week, waiting for a time from the shop) to verify the gains. Once that's done I will post about the install. Cliff's notes: 987 box is a pain (we knew that) Ben's Plenum is easy peasy; I also came up with a decent way to attach both using existing silicone piping and a bit of aluminum pipe. Stay tuned!

[madmodz]

After switching coils, I'm still pulling the P0306 code. Car wouldn't rev pass 2000. I unplugged the MAF and it revved fine. So next thing is I'm going to pull the MAF off another boxster and try it out. So heads up, if you pull one of these codes, unplug the MAF to see if it clears up the problem.

[madmodz]

This P0306 code has hampered my ability to drive my car. It ran fine before. I pulled off a coil from another boxster and it did th e same thing. Flashing p0306. So what I have done:
1 coolant flush
2 oil change
3 pulled off intake/fuel rail/injectors and painted
4 plug change
5 tb and plenum change.

Would the fuel injector have anything to do with this code? I haven't really driven the car, just around the block a few times. It has no power.

[Ben006]

the code came after the plug change right ?

Make sure you have a spark on cylinder number 6.
If you removed the injectors, did you change the seals?

One thing you can do is swap the plug/coil or injector (one at a time) from cylinder 6 to another and see if the code moves to that cylinder, once it moves, you've found what is causing the trouble

[madmodz]

Originally Posted by Ben006

the code came after the plug change right ?

Make sure you have a spark on cylinder number 6.
If you removed the injectors, did you change the seals?

One thing you can do is swap the plug/coil or injector (one at a time) from cylinder 6 to another and see if the code moves to that cylinder, once it moves, you've found what is causing the trouble

Yes, put new seals on the injectors, but had no ideal if they are balanced.

After I put back on the intake manifold, it wouldn't rev right. I was thinking I had a fowl plug. This was before I added your plenum, so I know that's not the issue. Tonight Im pulling the whole sides coils off and pushing them back in.

To check for spark, I put the plug in the coil and ground it while trying to start the car right?

[Ben006]

I believe the coils ground through the bolt, so you have to have them in place :/

keep us in touch!

[eddy]

I have a dyno session set for tuesday am. i'll share results then!