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#1 | ||
Banned
Join Date: Sep 2013
Posts: 2,087
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I have a au series 3 4.0L i6 auto.
It has the following mods, 2.5 inch cat back exhaust and panel filter, plus xr6t snorkel. I also have an air deflector fitted behind grill. Anyhow under WOT I noticed the car would change up at just before 5000rpm, to me it felt like it was a little too soon. Surely I was giving up a few kW up top. So I did this mod as a test. 1. Replaced the pipe from airbox to rest of intake with a straight piece of 3inch aluminium pipe. Removed fitting from airbox lid to get it in. 2. Flicked the panel filter and Grabbed a 45 degrees 3 inch pipe and fitted up a 3 inch pod filter inside the stock airbox. Used a 3 inch piece of silicone hose to join the two pipes. RESULT: There is a noticeable difference in off the line, mid range and top end power. It now is happy to rev out to 5200-5300rpm before changing up and feels more powerful in doing so. There is a little bit more induction noise from the pod but it's enclosed in the stock airbox. Great mod... Under $100 all parts. The stock intake pipe that I removed closes up to about 2 inches at the point of the airbox, it must be restricting the power. There is probably going to be a fuel economy advantage as well. To compliment this mod, I'd grab a xr6t snorkel and also the air deflector you can make yourself with a bit of aluminium sheet. If your AU is changing up before 5000rpm @WOT try this intake mod and enjoy the benefits. |
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#2 | ||
Racing improves the breed
Join Date: Apr 2006
Location: SE Melbourne
Posts: 3,982
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Nice one Hulk, where did you get the new alloy pipe from? Any pics?
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1970 Mini Cooper S Historic Group Nc Touring car 1964 Mini Cooper S Historic Group Nb Touring car 2024 Subaru Outback Touring XT Victorian Hill Climb Championship |
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#3 | ||
Banned
Join Date: Sep 2013
Posts: 2,087
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#4 | |||
5.6L x 2 pilot
![]() ![]() Join Date: Dec 2009
Location: Canbra
Posts: 14,994
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Quote:
Cheers Stu
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2002 AU II LTD 5.6L 342ci T3 Short, AFR165 heads, Comp XE270HR-12 Cam, Brembo 4/4s(355/330), T3 5 spokes, LC-1 wideband, Whiteline HD swaybars, TCE 3K Hi Stall, PWR Auto Trans Cooler, Koni shocks, King Low Springs, Hurricane headers, 100 cpsi cats, Twin 2.5" exhaust. Quarter Mile: 13.73 @ 105.86mph Runner Up NA/DA to BF Fairlane/LTD Geelong AFD 2024 ![]() 2002 XR8 pursuit 250 Custom twin 2.5" exhaust w Herrod modifed extractors, Tuned with Moates QH
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#5 | |||
Miami Pilot
![]() Join Date: Jan 2005
Location: ACT
Posts: 21,701
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Quote:
I doubt therefore that peak power has changed, but it is likely that more air is being sucked into the engine at high rpm with the restriction removed.
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The Hammer: FG GTE | 376rwkw | 1/4 mile 11.793 @ 119.75mph 1.733 60' (4408lb) 1 of 60 FG MK1 335 GTEs (1 of 118 FG Mk 1 & 2 335 GTEs). Mods: Tune, HSD/ShockWorks, black GT335 19” staggered replicas with 245 & 275/35/19 Michelin Pilot sport 5s Daily: BF2 Fairmont Ghia I6 ZF, machine face GT335 19” staggered Replicas with 245s and 275s, Bilsteins & Kings FPV 335 build stats: <click here> Ford Performance Club ACT |
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#6 | |||
Banned
Join Date: Sep 2013
Posts: 2,087
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Quote:
I've tested it plenty times, it's definitely true. |
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#7 | |||
Banned
Join Date: Sep 2013
Posts: 2,087
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Quote:
It's definitely feeling more powerful, car just pulls harder everywhere. I'd be happy if I'd done a full exhaust and it made such a change as it's done. |
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