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Old 03-28-2004, 12:16 PM   #1
HotRodWagon
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HRW intake mod testing results

I took intake air temp readings today. These are the results:
HRW Intake testing 03/28/2004
All measurements obtained with Auterra Dyno Scan software reading the ecu sensors through the OBDII port.
Ambient air temp 46. All testing done at highway speeds with absolutely no traffic. Car fully warmed, with coolant temp reading of 201 degrees.
Test#1 Stock intake system with ITG panel filter:
Speed 50mph 60mph 70mph 80mph
Temp 66 65 64 63
Test#2 Blocked snorkel, with ITG panel filter and HRW mod
* The is feeding the engine through the small resonator opening/cowl tube to resonator only.
Speed 50mph 60mph 70mph 80mph
Temp 65 63.5 61 57
Test#3 Stock snorkel with ITG panel filter, and HRW mod
Speed 50mph 60mph 70mph 80mph
Temp 63 61 59 57
Test#4 Modified grille cover (removed the portion of the grill cover on the backside of the large debris ridge), ITG panel filter, stock snorkel
Speed 50mph 60mph 70mph 80mph
Temp 48 48 48 48
Test #5 Modified grille cover, ITG, & HRW mod, stock snorkel
Speed 50mph 60mph 70mph 80mph
Temp 46 48 48 46


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Old 03-28-2004, 12:17 PM   #2
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Summary:
The grille cover mod made the largest difference. Temp drop averaged 12 degrees or so from 50 to 80mph. The HRW mod, dropped another 1 to 2 degrees from no HRW mod. Running the engine with the blocked snorkel/grille cover mod produced similar results, however airflow was noticeably insufficient.
Conclusion: the modified grille cover, stock snorkle, and HRW mod kept intake air temps within a degree or two of ambient air temp. This is a huge improvement over the stock system. It is apparent thegrille mod & HRW mod work. A better set up would be the grille mod, SVT snorkel, and an enlarged resonator opening of some sort. But considering the results of the last test #5, the better setup would probably not drop temps much more, but increase intake airflow. As a side note,
The HRW mod produces a distinct “whistle” under full throttle.
Considering the outside air temp was only 46 degrees, the full intake setup should result in much better power when air temps increase to 80 degrees.
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Old 03-28-2004, 12:21 PM   #3
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Very nice write up with full numbers to prove it....pretty impressive...can you post pictures of test #5 with the ful set-up??...........

Peace..................
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Old 03-28-2004, 12:32 PM   #4
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sure...
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Old 03-28-2004, 12:41 PM   #5
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Nice work, HRW... forgive my ignorance, but what is the HRW mod exactly? Maybe the pictures will clarify.
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Old 03-28-2004, 12:47 PM   #6
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The HRW mod is the hose going from the resonator to the cowl.

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Old 03-28-2004, 03:05 PM   #7
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Pretty slick man...How long did it take you to rig that up?
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Old 03-28-2004, 03:17 PM   #8
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About 15 minutes
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Old 03-28-2004, 03:51 PM   #9
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Me = stupid. I don't quite get how you modified the cowl/grille area?? Can you explain that? Interesting idea, I like it. Would one of the standard Zetec intake silencers fit into the SVT intake box in place of the SVT "short snorkel" - the box itself looks the same so I'm guessing the opening for the silencer is the same, too. Then we could make the mod too!
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Old 03-28-2004, 04:33 PM   #10
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Take a look at the part of the grill cover right infront of the snorkel intake. I used a dremel to remove the portion after the large debris hump. This allows air fom the grille to flow to the snorkel. There is a Euro grille cover available from european-parts.net, but it requires the use of a Euro grille which has thinner mounting tabs. I believe the intake resonator is the same, so yes you could do this mod too. I used a hole saw to make both holes...the cowl where I drilled is just plastic.
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