Intake plenum and 911 throttle body - Page 14 - 986 Forum - The Community for Porsche Boxster & Cayman Owners

achillies · 09-25-2016, 06:32 AM

Are you still testing or are they for sale?

Ben006 · 09-25-2016, 07:04 AM

I'm waiting for the testers to give me their feedback on the installation, in case I need to modify something to make them easier to fit.

eddy · 09-28-2016, 05:17 PM

Hi Ben,
I was out of town till today. Opened up the package and everything looks great! A very quality piece you've designed and created.

I'll update with pics soon. hope to install in the next week or so.

Ben006 · 09-29-2016, 02:32 PM

Glad that you like it

I can't wait to hear from you! Quick quick!

eddy · 09-29-2016, 06:05 PM

baseline dyno 8am eastern monday. hope to get the airbox and plenum in and re dynoed the week after!

Quote:

Originally Posted by Ben006

Glad that you like it

I can't wait to hear from you! Quick quick!

madmodz · 09-29-2016, 06:43 PM

Quote:

Originally Posted by eddy

baseline dyno 8am eastern monday. hope to get the airbox and plenum in and re dynoed the week after!

A week might be too soon to let the ECM fully adjust to the plenum. try 3 weeks.

madmodz · 09-29-2016, 04:29 PM

I have been building a custom fiberglass airbox. I really don't want to, but I must. I'm also using a evo fresh air intake. Curious if the oem tube fits around the throttle body

eddy · 09-29-2016, 06:53 PM

or how much driving? would like to move it along quickly

madmodz · 09-29-2016, 06:57 PM

I have read on here it takes a little time to fully let the ecm adjust to the new accessories. You wouldn't get a true reading dynoing the next day.

Ben006 · 10-01-2016, 07:23 AM

Quote:

Originally Posted by madmodz

I have read on here it takes a little time to fully let the ecm adjust to the new accessories. You wouldn't get a true reading dynoing the next day.

Yes, it takes at least a week.
You will feel it when driving, the idle will be stable and you should feel an improvement.

mavis.d · 10-01-2016, 06:48 AM

Mine arrived today

Go away for 12 days tomorrow

but

madmodz · 10-01-2016, 09:28 PM

I started the install today and had to re-read all 14 pages here. First mistake I made, is not realize that there is o-ring. No wor.ies, got to get some silicone or gasket maker. 2nd mistake is that I have not purchased the 3" intake tube and silicone elbows.

madmodz · 10-02-2016, 11:20 PM

Size matters! Though I haven't had a chance to test due to other mods, there is no doubt I'm going to pull at the least 20hp making it the best bang for your buck item.
That's 996 TB vs 986 TB

.

eddy · 10-03-2016, 06:27 AM

I did my baseline dyno run today. All stock, desnorkeled. three runs, best hp was 223, best tq was 196. will get started on install later this week/early next and do a follow up dyno once the computer has had a chance to figure it out.

Meir · 10-03-2016, 09:03 AM

keep the good work guys.
cant wait to see some dyno results.

heliguy · 10-03-2016, 11:36 AM

Quote:

Originally Posted by eddy

I did my baseline dyno run today. All stock, desnorkeled. three runs, best hp was 223, best tq was 196. will get started on install later this week/early next and do a follow up dyno once the computer has had a chance to figure it out.

We are so curious!!

madmodz · 10-03-2016, 09:12 PM

Eddy,
What are you doing for a air intake?

eddy · 10-04-2016, 02:49 AM

I picked up a 987 airbox. I'll be plumbing the 986 3" MAF onto it and using 3" piping to the TB. I don't want to have to sort out a re-tune to accommodate the larger MAF.

madmodz · 10-04-2016, 04:07 PM

As you guys know, Ben has a few of us beta testing the unit for fit, performance, strength etc.

I would suggest changing the end of the plenum from concave to straight like the 986 oem and adding the groove for the boot to fit on.

I thought my unit was not wide enough due to me having issues with the boot not providing a good seal. I measured it against the oem. The issue is the edge of the plenum. It slopes downward. My clamps right at where the unit starts sloping down. I can't get a good seal. I have the other side of the boot on the groove of the intake manifold. For me to get it to seal, I have to move the boot off the intake manifold groove and closer to the plenum.

Since I have to order the silicone, a solution would be to replace the boots with two of these which would give the seal I need plus look cool

Ben006 · 10-04-2016, 04:59 PM

The slant was to make fitment easier, the OD of the plenum is bigger than the OEM.

You should not need new boots, The clamp should fit just after the chamfer:

The boots won't go as far on the side manifolds as before, but sealing is still good. The grooves are more for locating.

Best way to get it easily on it to first put both boots as far in as possible on the plenum, slide the plenum in between the manifolds, then slide the boots back in their final position.

Don't tighten the outer clamps before you get the new intake tube in, it won't be as flexible as the original one!

Now that I've said that... You're probably right, using this method, the chamfer doesn't need to be that wide! I can probably make it narrower, that will give more surface to seal.

I've put the chamfer when I was using a different method to put the plenum in: Both boots on the sides, slide the plenum in, then slide the boots over the plenum.

Thank you for you're feed back, continue to share your thoughts! This is exactly what I need to know!

Ben