Anyone build a custom air filter system?
02-06-2010, 11:47 PM
#31
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Remember, my system vented 1/3rd the air flow from the rear of the airbox, to the base of the windshield. I did this with a sealed bridge to the base of windshield area. keep in mind, the pressure I measured in the tubes and at the base of the windshield, were near the same. about .2psi at near 120mph. getting the ram air effect from both areas probably helps in road race use.
From what the ad said on screen with larger holes it helped out so the car wouldn't surge.
When they vented the air box are you talking of drilling holes in it like on dirt bikes where they ad the little filters in the sides after they are drilled out.
With air coming in from both sides wonder how a divider would do down the center.On the dyno DR's should a good increase in HP.The real test is taking the car down the drag strip as with the ram air the system may ad more HP while in motion thats one thing the dyno can't show.
Could run the stock air box just cut the whole filter out and use the outter gasket area for a seal and run inline filters could then see how good the stock air box is.
Has anyone tried that?Have you tested the stock air box without a filter to see if any difference?
When they vented the air box are you talking of drilling holes in it like on dirt bikes where they ad the little filters in the sides after they are drilled out.
With air coming in from both sides wonder how a divider would do down the center.On the dyno DR's should a good increase in HP.The real test is taking the car down the drag strip as with the ram air the system may ad more HP while in motion thats one thing the dyno can't show.
Could run the stock air box just cut the whole filter out and use the outter gasket area for a seal and run inline filters could then see how good the stock air box is.
Has anyone tried that?Have you tested the stock air box without a filter to see if any difference?
02-07-2010, 12:31 AM
#32
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actually, my car does an excellent job of meterng fuel. most of which is really the O2 sensor's job. the filter itself, does a pretty good job of smoothing flow. most ALL race cars do not have screens. I wonder how much HP they cost. not worth it for me to test, but someone, someday will. they are MURDER on air flow. put a MAF on a flow bench , with and without screens and see the difference.
the KNs were worth 5-7hp, and it was pretty distintive. the real reason you or most have not seen gains is due to why? can you guess. Ill tell you . The air box leaks. as you get more restriction as far as paper filters, more air bypasses the air box entirely. sealed up with a proper pressure and fit, Ive measured, near .5" Hg vacuum change! thats huge. IM sure someone can do that dyno test, but if they do, i hope they seal up the air box for a valid test
I dont think headers are worth 35hp, but im sure much of it was the header, pipes, and slight tune up and the screens. (and maybe even the coding plug with the proper setting..
the KNs were worth 5-7hp, and it was pretty distintive. the real reason you or most have not seen gains is due to why? can you guess. Ill tell you . The air box leaks. as you get more restriction as far as paper filters, more air bypasses the air box entirely. sealed up with a proper pressure and fit, Ive measured, near .5" Hg vacuum change! thats huge. IM sure someone can do that dyno test, but if they do, i hope they seal up the air box for a valid test
I dont think headers are worth 35hp, but im sure much of it was the header, pipes, and slight tune up and the screens. (and maybe even the coding plug with the proper setting.
.
02-07-2010, 03:46 AM
#33
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that would be great! I wish I could do that kind of testing. I did have some back and forth testing with the stock air box and cone filter bolted to the MAF. the stock air box was better by 3-4 hp, which I was in denial about, so we kept on going back and forth. It always was better. never expected that.
02-07-2010, 04:14 AM
#34
Nordschleife Master
I really Like Dave's setup, I just wish they were available
But it sounds like the kinks are getting ironed out, by the time I have a car suitable for one hopefully he will have them in stock.
But it sounds like the kinks are getting ironed out, by the time I have a car suitable for one hopefully he will have them in stock.
02-07-2010, 08:08 AM
#35
Nordschleife Master
I have been looking to do one also,the cayenne system and the panamera look similar to the black bird system. I found that the panamera hoses are flexible couplings and can be use in conjunction with a k&N filter on each side. I am not certain of the height ,but the price for the tube that resemble the y shaped only cost 30.00 bucks...Any other members might want to check that out too....
Attached is the pic of the cayenne bits - the bellows and the y-piece are all about $30 each it seems.
Of course you'd still need to cough up a lot of $$ for filters, plus other miscellaneous bits, clamps etc., so not really much saving, but still interesting for its use of OEM parts. If the sizing is right? (cayenne looks to be too small - 87mm seal on the y-piece where the MAF would be - not sure on Panamera).
02-07-2010, 01:24 PM
#36
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The boxster setup above looks just like the Y-piece in the Ferrari 355. I should see if that fits the 928 MAF (the rubber piece at the bottom of the pic)
I think it's larger, but not 100% sure:
I think it's larger, but not 100% sure:
02-07-2010, 02:13 PM
#37
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Interesting post that didn't get comments.
Attached is the pic of the cayenne bits - the bellows and the y-piece are all about $30 each it seems.
Of course you'd still need to cough up a lot of $$ for filters, plus other miscellaneous bits, clamps etc., so not really much saving, but still interesting for its use of OEM parts. If the sizing is right? (cayenne looks to be too small - 87mm seal on the y-piece where the MAF would be - not sure on Panamera).
Attached is the pic of the cayenne bits - the bellows and the y-piece are all about $30 each it seems.
Of course you'd still need to cough up a lot of $$ for filters, plus other miscellaneous bits, clamps etc., so not really much saving, but still interesting for its use of OEM parts. If the sizing is right? (cayenne looks to be too small - 87mm seal on the y-piece where the MAF would be - not sure on Panamera).
Hope to find more out on sizes.
Checked the 928s4 most already know sizes
MAF
MAF
86.5mm ID flow area =approx 3.406"
91.6mm ID of screen area=approx 3.606"
95.6MM OD for air cleaner rubber gasket=approx 3.764""
I am also looking at Corvette C5
Overall height would have to be machined off
I put rubber mock up together 6inch is too high used it just to see how much room etc.
Looking toward 4 1/2 to 5inch overall to fit.
Below 3 1/2" diameter pipe which the C5 aftermarket is.
The Corvette C5 pipe is available with 3.5 od and if .08 wall thickness per side ID would be 3.34".
If you guys come up with more info on the Panamera and the Ferrari 355 need to know overheight also and MAF size of at least 90mm or 3.5inches would seem to match best.
Dodge Durango also uses the similar pipe as the C5 I think the pipe for the Durango may be sold for the both.
Already know what the baseline is on the car ET at the drags so this will be a good test for the system when done.
Last edited by inactiveuser1; 06-04-2013 at 01:42 AM.
02-08-2010, 01:55 AM
#38
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INTAKE MAF
I am going to PORSCHE dealership parts dept tomorrow to find out the sizing of the maf. I have the picts of the panamera ,but i dont know how to post the picts. We could ask on the forum for the panamera guys to chime in on the info and picts of their engines...
02-08-2010, 04:32 AM
#39
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Click on go advanced then you should see the manage attachments after.
Click on manage attachment and then a seperate window will open.
Click on browse which then you can select the picture from a folder in your computer.
Once you select the picture click uplood wait for it to attach.
then ok it.
Sizes are limited on pictures so if it doesnt load you have to resize them smaller.
Click on manage attachment and then a seperate window will open.
Click on browse which then you can select the picture from a folder in your computer.
Once you select the picture click uplood wait for it to attach.
then ok it.
Sizes are limited on pictures so if it doesnt load you have to resize them smaller.
02-08-2010, 04:59 PM
#41
Nordschleife Master
My Porsche tech built a cold airintake that uses a dry filter outside the engine compartment. This is for NA track cars only using the stock maf.
With the HVAC removed - he punched a hole in the firewall. He built a Maf adapter and mandrel pipe that fits the maf and then through the firewall, the pipe then bends left (driver right when behind the wheel) and has the dry filter in place where the wiper motor used to be. Using a good size aftermarket cone air filter. The mandrel pipe is fitted to the maf opening.
Wish I had pictures ....
With the HVAC removed - he punched a hole in the firewall. He built a Maf adapter and mandrel pipe that fits the maf and then through the firewall, the pipe then bends left (driver right when behind the wheel) and has the dry filter in place where the wiper motor used to be. Using a good size aftermarket cone air filter. The mandrel pipe is fitted to the maf opening.
Wish I had pictures ....
02-08-2010, 05:31 PM
#42
Burning Brakes
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My Porsche tech built a cold airintake that uses a dry filter outside the engine compartment. This is for NA track cars only using the stock maf.
With the HVAC removed - he punched a hole in the firewall. He built a Maf adapter and mandrel pipe that fits the maf and then through the firewall, the pipe then bends left (driver right when behind the wheel) and has the dry filter in place where the wiper motor used to be. Using a good size aftermarket cone air filter. The mandrel pipe is fitted to the maf opening.
Wish I had pictures ....
With the HVAC removed - he punched a hole in the firewall. He built a Maf adapter and mandrel pipe that fits the maf and then through the firewall, the pipe then bends left (driver right when behind the wheel) and has the dry filter in place where the wiper motor used to be. Using a good size aftermarket cone air filter. The mandrel pipe is fitted to the maf opening.
Wish I had pictures ....
02-08-2010, 05:39 PM
#43
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Try that with a standard on 3 runs see how consistant the ET is.
Even on the last run with .550 light and the other guy had a heck of a light with a .513
The car went 9.464 on a 9.45 dial in the car itself is very consistant and made up for it only .014 off the dial in.
Last edited by inactiveuser1; 06-04-2013 at 01:42 AM.
02-08-2010, 09:23 PM
#44
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PET help
Hey anyone with full access to the PET.... could you look up the p/n for the intake "Y" at the front of a Cayenne Turbo? It's different than the one shown earlier in this post. Thank in advance.
02-09-2010, 12:45 AM
#45
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Jim looks like 955 110 046 50 and part of the coolant system. About $35.
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Does it have the "Do It Yourself" manual transmission, or the superior "Fully Equipped by Porsche" Automatic Transmission?
George Layton March 2014
928 Owners are ".....a secret sect of quietly assured Porsche pragmatists who in near anonymity appreciate the prodigious, easy going prowess of the 928."
Does it have the "Do It Yourself" manual transmission, or the superior "Fully Equipped by Porsche" Automatic Transmission?
George Layton March 2014928 Owners are ".....a secret sect of quietly assured Porsche pragmatists who in near anonymity appreciate the prodigious, easy going prowess of the 928."