01-01-2014, 03:52 PM
|
#21
|
Registered User
Join Date: Sep 2013
Location: Bay Area, CA
Posts: 310
|
Quote:
Originally Posted by Brad Roberts
Good job!!
Yes, 3+ years ago we built a 3.6 LN engine with a 987 CaymanS intake (easier to fit under a 987 engine cover) which is a direct fit for the 986.
|
I thought the 987 cayman S has a resonance flap on its intake plenum? Did you tee off the resonance flap vacuum line to run it?
__________________
If you are interested in a Comfort-Top module, please visit:
https://www.enhancedautomods.com/shop/comfort-top
|
|
|
01-01-2014, 03:57 PM
|
#22
|
Registered User
Join Date: Aug 2004
Location: Alta Loma, CA
Posts: 1,334
|
I believe we left it "open" I have slept since then, and the car is in Texas.
__________________
Engine Builds, Transmission Builds, Engine Conversions, Suspension Installs, Suspension Tuning, Driver Coaching, Data Acquisition, Video, SCCA/PCA/POC/NASA/GRAND AM/ALMS.
We have worked with amateur and professional drivers for over 26 years. In house machinist, In house fabrication. Our cars, our parts, our engines, our transmission's run nationwide at events every weekend. We work side by side with industry names developing parts.
|
|
|
01-01-2014, 04:10 PM
|
#23
|
Registered User
Join Date: Sep 2013
Location: Bay Area, CA
Posts: 310
|
Quote:
Originally Posted by Brad Roberts
I believe we left it "open" I have slept since then, and the car is in Texas.
|
Interesting. I've been wondering if you could run it off the resonance flap vacuum line. I wondered how it would affect intake charging if both the resonance flap and plenum flap were closed and allowed the 986 to run as two 3 liter engines.
At around 5k rpm I think the 986 resonance flap opens so if we could tee that vacuum line, it might be possible to get the extra airflow advantage at high rpm, and retain low end torque.
Not sure if this is possible... Just a thought
__________________
If you are interested in a Comfort-Top module, please visit:
https://www.enhancedautomods.com/shop/comfort-top
|
|
|
01-01-2014, 04:12 PM
|
#24
|
Registered User
Join Date: Aug 2004
Location: Alta Loma, CA
Posts: 1,334
|
You are on the right track I believe we actually removed the flap from the pivot. I'm going through pics right now trying to jog my memory.
__________________
Engine Builds, Transmission Builds, Engine Conversions, Suspension Installs, Suspension Tuning, Driver Coaching, Data Acquisition, Video, SCCA/PCA/POC/NASA/GRAND AM/ALMS.
We have worked with amateur and professional drivers for over 26 years. In house machinist, In house fabrication. Our cars, our parts, our engines, our transmission's run nationwide at events every weekend. We work side by side with industry names developing parts.
|
|
|
01-01-2014, 04:29 PM
|
#25
|
Registered User
Join Date: Sep 2013
Location: Bay Area, CA
Posts: 310
|
Quote:
Originally Posted by Brad Roberts
You are on the right track I believe we actually removed the flap from the pivot. I'm going through pics right now trying to jog my memory.
|
I have a 997 plenum, cayman S plenum, and cayman S throttle body coming soon to play around with to see what I can get.
I've looked like everywhere and this is the first I've heard if someone putting the 987 intake on a boxster m96 engine.
__________________
If you are interested in a Comfort-Top module, please visit:
https://www.enhancedautomods.com/shop/comfort-top
|
|
|
01-01-2014, 04:34 PM
|
#26
|
Registered User
Join Date: Aug 2004
Location: Alta Loma, CA
Posts: 1,334
|
As I posted above.,.. the 2.7/3.2 intake was too small for the 2.7/3.2 Why does a 3.2 make 50 less hp than a 3.4 with essentially the same heads/cams?? Intake and exhaust are too small
We had a LOT of time into the adapters we made to adapt the plenum.
__________________
Engine Builds, Transmission Builds, Engine Conversions, Suspension Installs, Suspension Tuning, Driver Coaching, Data Acquisition, Video, SCCA/PCA/POC/NASA/GRAND AM/ALMS.
We have worked with amateur and professional drivers for over 26 years. In house machinist, In house fabrication. Our cars, our parts, our engines, our transmission's run nationwide at events every weekend. We work side by side with industry names developing parts.
|
|
|
01-01-2014, 04:36 PM
|
#27
|
Registered User
Join Date: Aug 2004
Location: Alta Loma, CA
Posts: 1,334
|
We are kinda past that at this point. I'm working on 9A1 NON DFI intake onto the larger DFI engines right now. The first 9A1 engine was NON DFI (2.9) it uses the same center section as the 3.4/3.8 DFI.
Once I get this done.. the DFI engines will go right into the early 987 chassis (and possibly the later 986)
I've already had a 2.9 running in an 06 chassis
__________________
Engine Builds, Transmission Builds, Engine Conversions, Suspension Installs, Suspension Tuning, Driver Coaching, Data Acquisition, Video, SCCA/PCA/POC/NASA/GRAND AM/ALMS.
We have worked with amateur and professional drivers for over 26 years. In house machinist, In house fabrication. Our cars, our parts, our engines, our transmission's run nationwide at events every weekend. We work side by side with industry names developing parts.
|
|
|
01-01-2014, 04:46 PM
|
#28
|
Registered User
Join Date: Sep 2013
Location: Bay Area, CA
Posts: 310
|
Project 3.6 coming together
Quote:
Originally Posted by Brad Roberts
As I posted above.,.. the 2.7/3.2 intake was too small for the 2.7/3.2 Why does a 3.2 make 50 less hp than a 3.4 with essentially the same heads/cams?? Intake and exhaust are too small
We had a LOT of time into the adapters we made to adapt the plenum.
|
I know I'm going to need to get reducers to fit the plenum to the manifold. I've been considering getting the larger intake manifold for the 986 but if figure that the manifold won't restrict the air as much.
However, the 987 intake box will probably be the final upgrade to the intake system. To maximize airflow without need to get a larger maf housing an complete remap. I also don't want to end up in the situation where the injectors can't richen up the fuel enough.
__________________
If you are interested in a Comfort-Top module, please visit:
https://www.enhancedautomods.com/shop/comfort-top
|
|
|
01-01-2014, 04:52 PM
|
#29
|
Registered User
Join Date: Aug 2004
Location: Alta Loma, CA
Posts: 1,334
|
Not really reducers.. the main issue is: bolt holes don't line up. We actually installed the 987 intake onto 3.4 heads on a 3.6 LN block. The 3.2 heads *might* have been easier, but we already had a fully prepped set of 3.4 heads sitting around/ported/flowed.
Porsche used the 987 airbox stock in the 50th anniversary 986. The "tune" comes up in the PIWIS when I perform 986 programming.
__________________
Engine Builds, Transmission Builds, Engine Conversions, Suspension Installs, Suspension Tuning, Driver Coaching, Data Acquisition, Video, SCCA/PCA/POC/NASA/GRAND AM/ALMS.
We have worked with amateur and professional drivers for over 26 years. In house machinist, In house fabrication. Our cars, our parts, our engines, our transmission's run nationwide at events every weekend. We work side by side with industry names developing parts.
|
|
|
01-01-2014, 04:56 PM
|
#30
|
Registered User
Join Date: Sep 2013
Location: Bay Area, CA
Posts: 310
|
Quote:
Originally Posted by Brad Roberts
Not really reducers.. the main issue is: bolt holes don't line up. We actually installed the 987 intake onto 3.4 heads on a 3.6 LN block. The 3.2 heads *might* have been easier, but we already had a fully prepped set of 3.4 heads sitting around/ported/flowed.
Porsche used the 987 airbox stock in the 50th anniversary 986. The "tune" comes up in the PIWIS when I perform 986 programming.
|
Oh, you mean the 987 intake manifold right? I'm going to stay stock with the 986 manifold for now.
__________________
If you are interested in a Comfort-Top module, please visit:
https://www.enhancedautomods.com/shop/comfort-top
|
|
|
01-01-2014, 05:00 PM
|
#31
|
Registered User
Join Date: Aug 2004
Location: Alta Loma, CA
Posts: 1,334
|
Yes, sorry. The intake required adapters.
987 Box goes in, but requires you to cut the muffler off of it to clear the 986 brake lines that run on the drivers side of the 986 engine compartment.
__________________
Engine Builds, Transmission Builds, Engine Conversions, Suspension Installs, Suspension Tuning, Driver Coaching, Data Acquisition, Video, SCCA/PCA/POC/NASA/GRAND AM/ALMS.
We have worked with amateur and professional drivers for over 26 years. In house machinist, In house fabrication. Our cars, our parts, our engines, our transmission's run nationwide at events every weekend. We work side by side with industry names developing parts.
|
|
|
01-01-2014, 05:03 PM
|
#32
|
Registered User
Join Date: Apr 2010
Location: Canada
Posts: 3,121
|
the flapper on the 987 plenum actuates at different rpm than the resonance flapper on the manifold. if you search you can find a description of the activation points. also note when you look at the ecu pinouts that the signal for the plenum flapper comes from a different pin than the signal for the mainifold flapper, which would indicate that it's triggered at a different point.
otherwise, the boots that join the plenum to the manifold are rubber and have enough give to fit a larger plenum - no need for adaptors.
|
|
|
01-01-2014, 05:07 PM
|
#33
|
Registered User
Join Date: Aug 2004
Location: Alta Loma, CA
Posts: 1,334
|
I believe I crammed a 3.4 T in place one time Its tights, but works.
__________________
Engine Builds, Transmission Builds, Engine Conversions, Suspension Installs, Suspension Tuning, Driver Coaching, Data Acquisition, Video, SCCA/PCA/POC/NASA/GRAND AM/ALMS.
We have worked with amateur and professional drivers for over 26 years. In house machinist, In house fabrication. Our cars, our parts, our engines, our transmission's run nationwide at events every weekend. We work side by side with industry names developing parts.
|
|
|
01-01-2014, 05:07 PM
|
#34
|
Registered User
Join Date: Sep 2013
Location: Bay Area, CA
Posts: 310
|
Perfect. Didn't want the muffler anyways.
I'm sure on a 3.6 that frees up a good chunk of hp. I imagine I won't get the same percentage gain on my 2.7. I imagine I'll start seeing diminishing returns with cam timing and injector capabilities limiting the amount of usable air.
__________________
If you are interested in a Comfort-Top module, please visit:
https://www.enhancedautomods.com/shop/comfort-top
|
|
|
01-01-2014, 05:10 PM
|
#35
|
Registered User
Join Date: Aug 2004
Location: Alta Loma, CA
Posts: 1,334
|
There is a big thread buried somewhere. I showed how I modified it to work in an 01 986
__________________
Engine Builds, Transmission Builds, Engine Conversions, Suspension Installs, Suspension Tuning, Driver Coaching, Data Acquisition, Video, SCCA/PCA/POC/NASA/GRAND AM/ALMS.
We have worked with amateur and professional drivers for over 26 years. In house machinist, In house fabrication. Our cars, our parts, our engines, our transmission's run nationwide at events every weekend. We work side by side with industry names developing parts.
|
|
|
01-01-2014, 05:18 PM
|
#36
|
Registered User
Join Date: Sep 2013
Location: Bay Area, CA
Posts: 310
|
Quote:
Originally Posted by Brad Roberts
There is a big thread buried somewhere. I showed how I modified it to work in an 01 986
|
Nice. I think I'll go as far as I can to see what I can do on my own, then I'll go scouring the forum for some more insight.
I won't really be dynoing the process, but I have a Bluetooth obd2 scanner that gives me access to most of the PIDs, enough for it to 'calculate' hp and torque while driving. Throughout the upgrade process, I'll make a standardized test that takes me through the rpm range ( probably only 1st through 4th gear) and look for changes in the curves compared to the stock baseline. ( I think this form of dyno falls somewhere between butt dyno and a proper dyno)
__________________
If you are interested in a Comfort-Top module, please visit:
https://www.enhancedautomods.com/shop/comfort-top
|
|
|
01-01-2014, 05:20 PM
|
#37
|
Registered User
Join Date: Aug 2004
Location: Alta Loma, CA
Posts: 1,334
|
ALL the 2.7 987 Boxsters use it and make good HP
__________________
Engine Builds, Transmission Builds, Engine Conversions, Suspension Installs, Suspension Tuning, Driver Coaching, Data Acquisition, Video, SCCA/PCA/POC/NASA/GRAND AM/ALMS.
We have worked with amateur and professional drivers for over 26 years. In house machinist, In house fabrication. Our cars, our parts, our engines, our transmission's run nationwide at events every weekend. We work side by side with industry names developing parts.
|
|
|
01-01-2014, 05:28 PM
|
#38
|
Registered User
Join Date: Sep 2013
Location: Bay Area, CA
Posts: 310
|
Quote:
Originally Posted by The Radium King
the flapper on the 987 plenum actuates at different rpm than the resonance flapper on the manifold. if you search you can find a description of the activation points. also note when you look at the ecu pinouts that the signal for the plenum flapper comes from a different pin than the signal for the mainifold flapper, which would indicate that it's triggered at a different point.
otherwise, the boots that join the plenum to the manifold are rubber and have enough give to fit a larger plenum - no need for adaptors.
|
Ive seen that the plenum flap has multiple unique activation points. My hope is that triggering it with the resonance flapper may still provide some gain though the intake tuning wasn't designed for it. Happy accident?
__________________
If you are interested in a Comfort-Top module, please visit:
https://www.enhancedautomods.com/shop/comfort-top
|
|
|
01-01-2014, 05:38 PM
|
#39
|
Registered User
Join Date: Apr 2010
Location: Canada
Posts: 3,121
|
or restricted airflow at low rpm. porsche. never used a plenum flapper on the 911 i don't think.
|
|
|
01-01-2014, 05:52 PM
|
#40
|
Registered User
Join Date: Sep 2013
Location: Bay Area, CA
Posts: 310
|
Project 3.6 coming together
Quote:
Originally Posted by The Radium King
or restricted airflow at low rpm. porsche. never used a plenum flapper on the 911 i don't think.
|
If I feed the plenum flap from the resonance flap, it should open at 3k rpm, thus not restricting airflow at low rpm. The downside is that the resonance flap closes at >5k rpm and so at high rpm I may restrict airflow since the intake manifold will be cut into two separate intakes. My hope is that this will cause a supercharging effect at the heads (crossing my fingers), or wreak havoc on the intake tuning lol.
This is the extent of what I think I know. Does it make sense at all?
__________________
If you are interested in a Comfort-Top module, please visit:
https://www.enhancedautomods.com/shop/comfort-top
|
|
|
Posting Rules
|
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts
HTML code is On
|
|
|
All times are GMT -8. The time now is 08:39 PM.
| |