Engine bay Scoops

englishmike · 10-26-2009, 03:49 PM

I've noticed there are 2 different engine bay scoop designs. N/a and s/c. I wouldn't mind changing my s/c to the n/a type but does the n/a design draw less air?

muffinman · 10-26-2009, 03:52 PM

what scoop?

do you mean the passenger side vent? if so the only difference was 85-86 was split and 87-89 was not,

englishmike · 10-26-2009, 04:04 PM

Yes sorry, the passenger side air vent.

muffinman · 10-26-2009, 04:16 PM

there is no difference between sc or na. the only difference is the sc's were only 88-89.

this is the 85-86

this is the 87-89

swift978 · 10-27-2009, 02:21 AM

The 87-89 has a slight performance gain, due to the raised lip at the back of the "scoop" increasing pressure, where as the pre-87 is approximately static pressure (1 atm). its very minimal, would only really be worth the switch if the routing in the trunk was airtight and didn't have that pathway directly to the engine bay. otherwise just acts as extra cooling for the engine.

englishmike · 10-27-2009, 10:28 AM

Thanks for clearing that up. Has anyone on here switched their 87-89 to pre 87?

muffinman · 10-27-2009, 12:17 PM

I've never seen anyone change to the older one but i have seen alot of people go to the newer version.

traintech86 · 10-27-2009, 04:52 PM

i wonder how much a dif it actualy makes? performance wise of course. ill stick with the 89 version tho

mr2tim · 10-27-2009, 05:13 PM

I have 2 conversion "kits" if anyone of our 85-86 owners wants to go to the 87-89 trunk mounted air intake, it's the entire assembly that fits in the trunk and holds the air filter.

I do NOT however have that restricted snake like air induction tubing from the side intake grill to the air filter assembly.

Mr2tim

swift978 · 10-27-2009, 08:26 PM

i can do the calc if u want

mr2_mk1.5 · 10-27-2009, 09:16 PM

On my 86 I fabricated and welded a scoop over top of my vent and sealed the quarter panel so the only place the forced air has to go is through the hole to the engine compartment and I removed the rubber air duct and built a sheet metal box that holds my oil cooler right to the same spot and still utilizes the puller fan which I have set up to kick on if the oil temp reaches 165 degrees celsius (the sensor is screwed into the oil piping) and also my oil filter is mounted in there as well as my electric oil pump(I use an electric oil pump on a timer to preoil the engine upon first startup of the engine and to run for 7 min when the engine shuts off to recirculate oil through the turbo)

ToyotaTechGeek · 10-27-2009, 10:18 PM

Quote:

Originally Posted by mr2tim

I have 2 conversion "kits" if anyone of our 85-86 owners wants to go to the 87-89 trunk mounted air intake, it's the entire assembly that fits in the trunk and holds the air filter.

I do NOT however have that restricted snake like air induction tubing from the side intake grill to the air filter assembly.

Mr2tim

curious as to how you sealed-up the side vent boot.

mr2_mk1.5 · 10-27-2009, 10:22 PM

I just welded sheetmetal in place and seam sealered it all up, now all the air goes into the quarter panel and through the cooler, I'm using bulk head connecters for all the wiring and piping and foam weatherstrip around all the joints that bolt on

10-26-2009, 03:49 PM	#1 (permalink)
englishmike Some Skills Join Date: Sep 2009 Location: Birmingham, Alabama Posts: 85 Thanks: 0 Thanked 0 Times in 0 Posts iTrader Rating: (0/0% )	Engine bay Scoops I've noticed there are 2 different engine bay scoop designs. N/a and s/c. I wouldn't mind changing my s/c to the n/a type but does the n/a design draw less air?

10-27-2009, 05:13 PM	#9 (permalink)
mr2tim SUPERcharZed ToyZ RacZer Join Date: Mar 2008 Location: South Florida Posts: 1,789 Thanks: 8 Thanked 118 Times in 111 Posts My Google Map iTrader Rating: (6/100% )	87-89 air filter assembly in trunk available I have 2 conversion "kits" if anyone of our 85-86 owners wants to go to the 87-89 trunk mounted air intake, it's the entire assembly that fits in the trunk and holds the air filter. I do NOT however have that restricted snake like air induction tubing from the side intake grill to the air filter assembly. Mr2tim Attached Thumbnails

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10-26-2009, 03:52 PM	#2 (permalink)
muffinman U-P-G-R-A-Y-E-D-D Join Date: Jan 2008 Location: Sunny South Florida Posts: 5,881 Thanks: 53 Thanked 283 Times in 272 Posts Blog Entries: 1 My Google Map iTrader Rating: (2/100% )	what scoop? do you mean the passenger side vent? if so the only difference was 85-86 was split and 87-89 was not,

10-26-2009, 04:04 PM	#3 (permalink)
englishmike Some Skills Join Date: Sep 2009 Location: Birmingham, Alabama Posts: 85 Thanks: 0 Thanked 0 Times in 0 Posts iTrader Rating: (0/0% )	Yes sorry, the passenger side air vent.

10-26-2009, 04:16 PM	#4 (permalink)
muffinman U-P-G-R-A-Y-E-D-D Join Date: Jan 2008 Location: Sunny South Florida Posts: 5,881 Thanks: 53 Thanked 283 Times in 272 Posts Blog Entries: 1 My Google Map iTrader Rating: (2/100% )	there is no difference between sc or na. the only difference is the sc's were only 88-89. this is the 85-86 this is the 87-89

10-27-2009, 02:21 AM	#5 (permalink)
swift978 1st! Join Date: Aug 2007 Location: Mass Posts: 85 Thanks: 11 Thanked 0 Times in 0 Posts iTrader Rating: (1/100% )	The 87-89 has a slight performance gain, due to the raised lip at the back of the "scoop" increasing pressure, where as the pre-87 is approximately static pressure (1 atm). its very minimal, would only really be worth the switch if the routing in the trunk was airtight and didn't have that pathway directly to the engine bay. otherwise just acts as extra cooling for the engine.

10-27-2009, 10:28 AM	#6 (permalink)
englishmike Some Skills Join Date: Sep 2009 Location: Birmingham, Alabama Posts: 85 Thanks: 0 Thanked 0 Times in 0 Posts iTrader Rating: (0/0% )	Thanks for clearing that up. Has anyone on here switched their 87-89 to pre 87?

10-27-2009, 12:17 PM	#7 (permalink)
muffinman U-P-G-R-A-Y-E-D-D Join Date: Jan 2008 Location: Sunny South Florida Posts: 5,881 Thanks: 53 Thanked 283 Times in 272 Posts Blog Entries: 1 My Google Map iTrader Rating: (2/100% )	I've never seen anyone change to the older one but i have seen alot of people go to the newer version.

10-27-2009, 04:52 PM	#8 (permalink)
traintech86 Cage Fighter Join Date: May 2009 Location: Yokosuka, Kanagawa Japan Posts: 1,802 Thanks: 27 Thanked 47 Times in 43 Posts My Google Map iTrader Rating: (3/100% )	i wonder how much a dif it actualy makes? performance wise of course. ill stick with the 89 version tho

10-27-2009, 08:26 PM	#10 (permalink)
swift978 1st! Join Date: Aug 2007 Location: Mass Posts: 85 Thanks: 11 Thanked 0 Times in 0 Posts iTrader Rating: (1/100% )	i can do the calc if u want

10-27-2009, 09:16 PM	#11 (permalink)
mr2_mk1.5 Cage Fighter Join Date: May 2009 Location: Regina, Saskatchewan Canada Posts: 165 Thanks: 0 Thanked 10 Times in 9 Posts iTrader Rating: (1/100% )	On my 86 I fabricated and welded a scoop over top of my vent and sealed the quarter panel so the only place the forced air has to go is through the hole to the engine compartment and I removed the rubber air duct and built a sheet metal box that holds my oil cooler right to the same spot and still utilizes the puller fan which I have set up to kick on if the oil temp reaches 165 degrees celsius (the sensor is screwed into the oil piping) and also my oil filter is mounted in there as well as my electric oil pump(I use an electric oil pump on a timer to preoil the engine upon first startup of the engine and to run for 7 min when the engine shuts off to recirculate oil through the turbo)

10-27-2009, 10:22 PM	#13 (permalink)
mr2_mk1.5 Cage Fighter Join Date: May 2009 Location: Regina, Saskatchewan Canada Posts: 165 Thanks: 0 Thanked 10 Times in 9 Posts iTrader Rating: (1/100% )	I just welded sheetmetal in place and seam sealered it all up, now all the air goes into the quarter panel and through the cooler, I'm using bulk head connecters for all the wiring and piping and foam weatherstrip around all the joints that bolt on