Go Back   986 Forum - for Porsche Boxster & Cayman Owners > Porsche Boxster & Cayman Forums > Performance and Technical chat

Reply
 
LinkBack Thread Tools Display Modes
Old 02-25-2018, 12:47 PM   #1
Artist, 986S tinkerer
 
NewArt's Avatar
 
Join Date: Aug 2013
Location: Montreal, Canada
Posts: 1,570
987 air intake: latest developments

NewArt wrote:
Thought that I might run this by you. I took the car out for a spin yesterday. It ran like crap for the first 10 minutes but then everything smoothed out. I guess that the DME was adapting during my drive. I didn't push the car at all, hardly getting above 4000 RPM. When I got back home I left the car idling and hooked up the Durametric to see what the fuel trims looked like. The results are a bit wonky but I haven't got my Anniversary Edition tune yet. In light of my recent air intake intervention, do you think that these results are to be expected or should I be looking for a leak?
FRA 1: 1.28
RKAT 1: 2.53
FRA 2: 1.29
RKAT 2: 2.67
MAF: 1.18V
9 kg/h
Let me know what you think.

The Radium King replied:
"They look pretty much as you should expect pre-tune. your rkats are idle trims and in %; around 2.5% each side which is high as expected but within the 4% spec. they are positive which means the ecu is adding fuel as expected.

your fra values are around 1.3; more than the 1.2 that id predicted but close enough for the cocktail napkin math that id done. again, they are positive which means adding fuel as expected and, very close to the 1.32 spec which triggers a cel.

so, i think you are good; science wins another one."



__________________
James
2004 986 S
987 air intake TB and plenum, Mantissport 2 litre sump, UDP, Bilstein B6 with H&R lowering spings, re71-rs for track, other stuff.
https://www.youtube.com/user/12shoes2
NewArt is offline   Reply With Quote
Old 03-07-2018, 09:54 AM   #2
Artist, 986S tinkerer
 
NewArt's Avatar
 
Join Date: Aug 2013
Location: Montreal, Canada
Posts: 1,570
Update: Got my 2004 Spyder tune from Prestige Porsche today. I'll put up data after a few drive cycles but for now, all I can say is that she's pulling like a champ! My "Air Intake Mod -epilogue" video will come out as soon as I get the final dyno done. Watch for it!
__________________
James
2004 986 S
987 air intake TB and plenum, Mantissport 2 litre sump, UDP, Bilstein B6 with H&R lowering spings, re71-rs for track, other stuff.
https://www.youtube.com/user/12shoes2
NewArt is offline   Reply With Quote
Old 03-07-2018, 10:06 AM   #3
Registered User
 
Cunningr's Avatar
 
Join Date: Mar 2016
Location: Spain
Posts: 879
Was checking your feed last night for the final video! Lol.
__________________
2000 Boxster S Ocean Blue Metalic
Cunningr is offline   Reply With Quote
Old 03-07-2018, 10:20 AM   #4
Artist, 986S tinkerer
 
NewArt's Avatar
 
Join Date: Aug 2013
Location: Montreal, Canada
Posts: 1,570
It shouldn't be too long if it would only stop snowing!
__________________
James
2004 986 S
987 air intake TB and plenum, Mantissport 2 litre sump, UDP, Bilstein B6 with H&R lowering spings, re71-rs for track, other stuff.
https://www.youtube.com/user/12shoes2
NewArt is offline   Reply With Quote
Old 03-07-2018, 10:59 AM   #5
Registered User
 
The Radium King's Avatar
 
Join Date: Apr 2010
Location: Canada
Posts: 2,928
glad it went smoothly. recommend getting 50 km or so on the car to get your trims sorted out before dyno. and check your fra's to make sure everything is as it should be before flogging it on dyno.
The Radium King is offline   Reply With Quote
Old 03-07-2018, 11:06 AM   #6
Registered User
 
Cunningr's Avatar
 
Join Date: Mar 2016
Location: Spain
Posts: 879
Quote:
Originally Posted by The Radium King View Post
glad it went smoothly. recommend getting 50 km or so on the car to get your trims sorted out before dyno. and check your fra's to make sure everything is as it should be before flogging it on dyno.
Judt out of general interest could you explain what those settings are like a general short tutorial. What they should be and what they are. I have had my car 2 years now but just really getting more into the technical stuff.
__________________
2000 Boxster S Ocean Blue Metalic
Cunningr is offline   Reply With Quote
Old 03-07-2018, 11:40 AM   #7
Artist, 986S tinkerer
 
NewArt's Avatar
 
Join Date: Aug 2013
Location: Montreal, Canada
Posts: 1,570
I will make a brief fairly simple explanation in my upcoming video. For a really comprehensive explanation of fuel trims (as well as other technical stuff) I highly recommend the YouTube channel Schrodingers Box:
https://www.youtube.com/watch?v=5WnM_NsOtd8&t=677s
__________________
James
2004 986 S
987 air intake TB and plenum, Mantissport 2 litre sump, UDP, Bilstein B6 with H&R lowering spings, re71-rs for track, other stuff.
https://www.youtube.com/user/12shoes2
NewArt is offline   Reply With Quote
Old 03-07-2018, 11:42 AM   #8
Artist, 986S tinkerer
 
NewArt's Avatar
 
Join Date: Aug 2013
Location: Montreal, Canada
Posts: 1,570
TRK, Yeah, I'll get some drive cycles in this week and check my trims. So far so good!
__________________
James
2004 986 S
987 air intake TB and plenum, Mantissport 2 litre sump, UDP, Bilstein B6 with H&R lowering spings, re71-rs for track, other stuff.
https://www.youtube.com/user/12shoes2
NewArt is offline   Reply With Quote
Old 03-07-2018, 11:52 AM   #9
Registered User
 
The Radium King's Avatar
 
Join Date: Apr 2010
Location: Canada
Posts: 2,928
Quote:
Originally Posted by Cunningr View Post
Judt out of general interest could you explain what those settings are like a general short tutorial. What they should be and what they are. I have had my car 2 years now but just really getting more into the technical stuff.
DIY 987 Air Intake mod PART 3 !
The Radium King is offline   Reply With Quote
Old 03-07-2018, 07:02 PM   #10
Artist, 986S tinkerer
 
NewArt's Avatar
 
Join Date: Aug 2013
Location: Montreal, Canada
Posts: 1,570
I must say that although I am pleased with the outcome (yet to be confirmed), getting the tune from the Porsche dealer was executed at dealer rates. Since this is not a procedure that they often (ever) do, it took quite a bit of time for my tech to research the possibilities and get my okay and then push the tune. I spent 3 hours there but they only charged me for 2. And hey, I got free espresso and a complimentary car wash!
__________________
James
2004 986 S
987 air intake TB and plenum, Mantissport 2 litre sump, UDP, Bilstein B6 with H&R lowering spings, re71-rs for track, other stuff.
https://www.youtube.com/user/12shoes2
NewArt is offline   Reply With Quote
Old 03-07-2018, 07:36 PM   #11
Registered User
 
The Radium King's Avatar
 
Join Date: Apr 2010
Location: Canada
Posts: 2,928
ow; that's a lot of pesos. here's my intake ...



oem coupler at the maf holder introduces the bend early on so no contact with the transmission, and provides some isolation to keep engine vibration from affecting maf readings, then just a short coupler and a long-leg silcone elbow.
The Radium King is offline   Reply With Quote
Old 03-08-2018, 07:31 AM   #12
01101
 
Join Date: Jul 2015
Location: CT
Posts: 583
I like that coupler. I'll have to pick one up to round out my intake
alm001 is offline   Reply With Quote
Old 03-08-2018, 07:42 AM   #13
Registered User
 
The Radium King's Avatar
 
Join Date: Apr 2010
Location: Canada
Posts: 2,928
Quote:
Originally Posted by alm001 View Post
I like that coupler. I'll have to pick one up to round out my intake
yes, it looks close to factory like that. the only thing that might look even slicker would be to get the custom tube that ipd makes for their setups and use that.
The Radium King is offline   Reply With Quote
Old 03-08-2018, 08:22 AM   #14
Artist, 986S tinkerer
 
NewArt's Avatar
 
Join Date: Aug 2013
Location: Montreal, Canada
Posts: 1,570
TRK, What size is your metal coupler? That accordion coupler steps down from 3 5/8” to 3” or 3 1/4” ?
__________________
James
2004 986 S
987 air intake TB and plenum, Mantissport 2 litre sump, UDP, Bilstein B6 with H&R lowering spings, re71-rs for track, other stuff.
https://www.youtube.com/user/12shoes2
NewArt is offline   Reply With Quote
Old 03-08-2018, 08:46 AM   #15
Registered User
 
The Radium King's Avatar
 
Join Date: Apr 2010
Location: Canada
Posts: 2,928
i posted part #'s and sizes in one of your other threads iirc. i think 3.25" - it is the same OD as the TB, so everything joins together cleanly.
The Radium King is offline   Reply With Quote
Old 03-08-2018, 09:10 AM   #16
Artist, 986S tinkerer
 
NewArt's Avatar
 
Join Date: Aug 2013
Location: Montreal, Canada
Posts: 1,570
In that case, I think that your solution is a good one and simpler than mine! The accordion tube would also make it easier to remove the MAF tube for eventual cleaning, etc.
__________________
James
2004 986 S
987 air intake TB and plenum, Mantissport 2 litre sump, UDP, Bilstein B6 with H&R lowering spings, re71-rs for track, other stuff.
https://www.youtube.com/user/12shoes2
NewArt is offline   Reply With Quote
Old 03-08-2018, 09:23 AM   #17
Registered User
 
The Radium King's Avatar
 
Join Date: Apr 2010
Location: Canada
Posts: 2,928
one of the other considerations is that turbulence can move upstream of the actual thing causing the turbulence (think bow wave in front of a boat) so what is downstream of the maf can affect its reading.

one can assume that a bending accordion tube creates considerable turbulence, and first instinct is to smooth the flow. apparently porsche calibrates the maf readings to take into consideration this turbulence, however, so best to simulate oem as much as possible.
The Radium King is offline   Reply With Quote
Old 03-08-2018, 02:11 PM   #18
Registered User
 
The Radium King's Avatar
 
Join Date: Apr 2010
Location: Canada
Posts: 2,928
and did anybody notice the OCD way all my hose clamps line-up? engine's not clean at all, but everything is very orderly.
The Radium King is offline   Reply With Quote
Old 03-08-2018, 02:15 PM   #19
Artist, 986S tinkerer
 
NewArt's Avatar
 
Join Date: Aug 2013
Location: Montreal, Canada
Posts: 1,570
Quote:
Originally Posted by The Radium King View Post
and did anybody notice the OCD way all my hose clamps line-up? engine's not clean at all, but everything is very orderly.
Yeah, well you can imagine the turbulence if they were all willy-nilly!
__________________
James
2004 986 S
987 air intake TB and plenum, Mantissport 2 litre sump, UDP, Bilstein B6 with H&R lowering spings, re71-rs for track, other stuff.
https://www.youtube.com/user/12shoes2
NewArt is offline   Reply With Quote
Old 03-09-2018, 06:46 AM   #20
Need For Speed
 
KRAM36's Avatar
 
Join Date: Feb 2013
Location: Funville
Posts: 2,105
Garage
Quote:
Originally Posted by NewArt View Post
Update: Got my 2004 Spyder tune from Prestige Porsche today. I'll put up data after a few drive cycles but for now, all I can say is that she's pulling like a champ! My "Air Intake Mod -epilogue" video will come out as soon as I get the final dyno done. Watch for it!
"Pulling like a champ" my exact words from my mods.

__________________
2003 Boxster S
| 987 Air Box | K&N Air Filter | 76mm Intake Pipe| 996 76mm TB | 997 Distribution T | Secondary Cat Delete Pipes | Borla Muffler | NHP 200 Cell Exhaust Headers |
KRAM36 is offline   Reply With Quote
Reply


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On




All times are GMT -8. The time now is 11:29 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
Content Relevant URLs by vBSEO 3.6.0
Copyright 2018 Pelican Parts, LLC - Posts may be archived for display on the Pelican Parts Website -    DMCA Registered Agent Contact Page