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Bump! Any update on these side scoops?
Last edited by Sgt.Gator; 10-18-2017 at 05:26 PM.
"Good Judgement comes from Experience. Experience comes from Bad Judgement"
Owner: Colonel Red Racing
eBAy Store: http://stores.ebay.com/colonelredracing
818R ICSCC SPM
Palatov DP4 - ICSCC Sports Racer
Gator, I'm not sure which side scoops you are asking about, but I have the FFR ducts that collect/direct air from the side vents in front of the rear wheels. I like them on my street 818C and they are available from FFR. Here's my thread about the ducts:
http://thefactoryfiveforum.com/showt...18+Intercooler
818S/C : Chassis #25 with 06 WRX 2.5 turbo, ABS, cruise, PS, A/C, Apple CarPlay, rear camera, power windows & locks, leather & other complexities. Sold 10/19 with 5,800 miles.
Mk3 Roadster #6228 4.6L, T45, IRS, PS, PB, ABS, Cruise, Koni's, 17" Halibrands, red w/ silver - 9K miles then sold @ Barrett-Jackson Jan 2011 (got back cash spent).
Thanks Pete. Good read.
I'm trying to figure out if the fiberglass scoops I can order from FF are the same design as Jim tested in posts #24 and #25 in this thread.
"Good Judgement comes from Experience. Experience comes from Bad Judgement"
Owner: Colonel Red Racing
eBAy Store: http://stores.ebay.com/colonelredracing
818R ICSCC SPM
Palatov DP4 - ICSCC Sports Racer
Gator, in #24 and #25 Jim seems to be showing that the knife-edge of the vent increased flow. In #41 he is thinking of a duct and in thread #131 he shows the duct they made for the inside of the side vent. The 2 ducts Jim sent to me to test look just like the fiberglass duct in thread #131. I believe those are the same ones now offered on the FFR web site. Also in this thread about aero, I forgot who, but someone said the 2 side vents have a combined area of 65 sq. in. which is about the same as the OE WRX hood scoop. So, pulling air from both side vents plus the roof vent, I'm getting lots of air to my A2A intercooler as shown in the dual IAT gauge. Again, however, my 818C is a street car so WOT is brief.
Last edited by AZPete; 10-19-2017 at 03:03 PM.
818S/C : Chassis #25 with 06 WRX 2.5 turbo, ABS, cruise, PS, A/C, Apple CarPlay, rear camera, power windows & locks, leather & other complexities. Sold 10/19 with 5,800 miles.
Mk3 Roadster #6228 4.6L, T45, IRS, PS, PB, ABS, Cruise, Koni's, 17" Halibrands, red w/ silver - 9K miles then sold @ Barrett-Jackson Jan 2011 (got back cash spent).
Thanks Pete!
"Good Judgement comes from Experience. Experience comes from Bad Judgement"
Owner: Colonel Red Racing
eBAy Store: http://stores.ebay.com/colonelredracing
818R ICSCC SPM
Palatov DP4 - ICSCC Sports Racer
~ Mark
818C S/N 429ES: Start Date 1 September 2016
2001 NB Miata LS3 V8 440 rwhp
2004 Miata MazdaSpeed Factory Turbo
Mark, I'm still drawing intake air from the duct inside the right side vent. This right-side vent also feeds air through a 3-inch flex tube to the intercooler plenum, however. Most of the time cool air is sent to the intercooler and to the engine intake filter, but at WOT the engine sucks so much more air that it causes the flow in the tube to the intercooler to reverse, thus sucking air from the intercooler. I haven't changed it yet because I don't know what's best. Plus, this is a street car with only occasional WOT, so I wonder how bad this is.
I think the roof ducts would work well for your engine intake since the OE intake is 3-inch and the roof ducts are two 3-inch ducts, fed by the roof vent of (?)sq.in. I assume you have an A2W intercooler.
See Post #3 in this thread:
http://thefactoryfiveforum.com/showt...rcooler-Plenum
Last edited by AZPete; 10-21-2017 at 07:15 PM. Reason: typo
818S/C : Chassis #25 with 06 WRX 2.5 turbo, ABS, cruise, PS, A/C, Apple CarPlay, rear camera, power windows & locks, leather & other complexities. Sold 10/19 with 5,800 miles.
Mk3 Roadster #6228 4.6L, T45, IRS, PS, PB, ABS, Cruise, Koni's, 17" Halibrands, red w/ silver - 9K miles then sold @ Barrett-Jackson Jan 2011 (got back cash spent).
Thanks again, Pete, for your input. I want to run A2A IC in the stock position, just trying to reduce complexity where possible (and weight). Like you, this is a primarily a street car, and WOT will be a rarity for more than a few seconds. Having a single plenum is attractive as it also reduces complexity; I have followed your experiments in airflow and it is interesting that the engine sucks so much air when 'on full song'.
Are you running an oil cooler? How are you ducting air to it?
And one more time, thanks for the A/C install documents. It removed a lot of routing/location mysteries!
~ Mark
818C S/N 429ES: Start Date 1 September 2016
2001 NB Miata LS3 V8 440 rwhp
2004 Miata MazdaSpeed Factory Turbo
Mark, I'm not running an oil cooler other than the stock cooler/heater/whatever at the filter. Thousands of WRXs seem to be fine driving streets in lots of conditions, so I don't know why I would need any other oil cooler.
I was stupid to install 2 fans in my intercooler plenum, and will remove them. I put them in thinking I'd need them to move air when stopped or in stop-&-go traffic. But, at those times, the turbo is not heating the intake air and the engine is sucking ambient air through the intercooler, so having the fans push ambient air is useless. When my 818C is moving, I've got plenty of ambient air coming through the roof and side ducts to cool the intercooler.
Regarding appearance, I like the suggestion by ben1272. He said to make 2 narrow plenums, each leading from the roof ducts back to the intercooler. They would look sort of like the intakes on bigger engines. Good idea for another project.
818S/C : Chassis #25 with 06 WRX 2.5 turbo, ABS, cruise, PS, A/C, Apple CarPlay, rear camera, power windows & locks, leather & other complexities. Sold 10/19 with 5,800 miles.
Mk3 Roadster #6228 4.6L, T45, IRS, PS, PB, ABS, Cruise, Koni's, 17" Halibrands, red w/ silver - 9K miles then sold @ Barrett-Jackson Jan 2011 (got back cash spent).
Pete,
Think u are headed in right direction.
I have talked to turbo experts who
can prove with math/modeling/tests
that you only need about 30 mph air
speed for full cooling on air/air ic.
Of course higher is better especially for racing but
30 works for a strong street setup.
Thank Pete for your input. I will monitor the oil temp in the sump and see what happens. And thanks for the update on the plenum fans, with all your experimental data, you are helping us all about air through the A2A IC on top.
You talk about two narrow plenums from the roofs ducts, and can not visualize the result. I am getting close to first start and then will need to manufacture plenums.
~ Mark
818C S/N 429ES: Start Date 1 September 2016
2001 NB Miata LS3 V8 440 rwhp
2004 Miata MazdaSpeed Factory Turbo
I'm bumping this 5 year old thread because there are a lot of new builders who have never seen it and can benefit from what's in here.