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Cars & Coffee Killer
Join Date: Sep 2004
Location: State of Failure
Posts: 32,246
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Maf, Map, Hfm5
I hear a lot of discussion about going with a MAF over a MAP, or vice-versa. Further, it looks like FRWilk is working on an HFM5 (Bosch Hot-Wire) kit for the 951.
What is an MAF? What as an MAP? Is the HFM5 an MAP or MAF?
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Some Porsches long ago...then a wankle... 5 liters of VVT fury now -Chris "There is freedom in risk, just as there is oppression in security." |
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01-09-2006, 11:53 AM
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Ornery Bastard
Join Date: Sep 2001
Location: South Sound
Posts: 2,880
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MAF: Mass Air Flow
MAP: Manifold Absolute Pressure The advantage of a MAF is that it can be a "drop-in" replacement for our stock AFM, and it flows much better. Downside is that with a MAF, like with the AFM, vented boost from the BOV has to be re-circulated. A MAP is more difficult to install since more has to be changed, but it allows the use of much larger BOVs that vent to atmosphere. Useful if you're using a larger turbo.
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--------- Silver 1998 Volvo S70 T5 <- Daily (Anja) Guards Red 1986 951 <- Seattle car (Gretchen) White 1976 914 2.0 F.I. <- Prodigal car, traded away then brought back again (Lorelei) |
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01-09-2006, 12:06 PM
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Cars & Coffee Killer
Join Date: Sep 2004
Location: State of Failure
Posts: 32,246
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So the HFM5 is a MAF?
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Some Porsches long ago...then a wankle... 5 liters of VVT fury now -Chris "There is freedom in risk, just as there is oppression in security." |
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01-09-2006, 12:25 PM
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Ornery Bastard
Join Date: Sep 2001
Location: South Sound
Posts: 2,880
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Quote:
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--------- Silver 1998 Volvo S70 T5 <- Daily (Anja) Guards Red 1986 951 <- Seattle car (Gretchen) White 1976 914 2.0 F.I. <- Prodigal car, traded away then brought back again (Lorelei) |
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01-09-2006, 12:47 PM
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Registered
Join Date: Jul 2001
Location: Edmonton, Alberta, Canada
Posts: 4,530
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In mildly modified 951's you will find MAFs will idle/run more like stock.......where as some map systems will have some strange idle characteristics (link being one of them).
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Alex - PCA Polar Region - Boxster Muncher 86' 944 Turbo - Megasquirt - 326 rwhp/340lbft @ 18 psi SOLD www.edmontonhomelife.com www.edmontonrealestate.ws |
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01-09-2006, 03:24 PM
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Cars & Coffee Killer
Join Date: Sep 2004
Location: State of Failure
Posts: 32,246
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Wait...when did ae1969 get banned? Did I miss something? Did the offending thread get deleted?
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Some Porsches long ago...then a wankle... 5 liters of VVT fury now -Chris "There is freedom in risk, just as there is oppression in security." |
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01-10-2006, 04:55 AM
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Ornery Bastard
Join Date: Sep 2001
Location: South Sound
Posts: 2,880
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Quote:
__________________
--------- Silver 1998 Volvo S70 T5 <- Daily (Anja) Guards Red 1986 951 <- Seattle car (Gretchen) White 1976 914 2.0 F.I. <- Prodigal car, traded away then brought back again (Lorelei) |
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01-10-2006, 08:13 AM
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Cars & Coffee Killer
Join Date: Sep 2004
Location: State of Failure
Posts: 32,246
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Good one.
He got me.
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Some Porsches long ago...then a wankle... 5 liters of VVT fury now -Chris "There is freedom in risk, just as there is oppression in security." |
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01-10-2006, 08:14 AM
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Registered
Join Date: Jul 2001
Location: Edmonton, Alberta, Canada
Posts: 4,530
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OOOPS totally forgot I had that on there... LOL
__________________
Alex - PCA Polar Region - Boxster Muncher 86' 944 Turbo - Megasquirt - 326 rwhp/340lbft @ 18 psi SOLD www.edmontonhomelife.com www.edmontonrealestate.ws |
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01-10-2006, 08:37 AM
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