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I decided to do some slice and dice. I measured it out and could raise the stock filter lid 3/4 inch. I also going to "ram air" the intake with a 4" system. It's been a mess but with the new engine I could literally hear it starving for air.
The only issue I saw with that approach is that the OEM sized filters are still somewhat undersized.
Testing I've read about states that 1 sq. in. of filter area is required for every 6-7 HP. One filter element is about 5.5" square (filter media only IIRC) with the combined panels equaling 60 sq. in. Based on that we're limited to an unrestricted filtering capacity of 420 HP.
Of course many have pushed more power than that through less but there is a limit.
Last edited by skinny z; Feb 29, 2020 at 11:15 AM.
The only issue I saw with that approach is that the filters are still undersized for anything north of 400 HP. At least that's the spec that's listed at K&N.
K&N is wrong, IMO. Look at what the new cars have. Single bolt on filter. This will have 50 sq/in of area inlet. Rule is 146cfm per inch.
I was editing as you were replying.
I hadn't come across the 146 CFM guideline before. That's an enormous amount. (146 x 50!) Something I'll take into consideration if the cowl induction doesn't pan out.
If you can, use silicone for the flex joint at the throttle body, the convoluted factory flex joints don't do anything to reduce air turbulence, although this would not be significant at other places in the system, it is right at the entry to the TB.
If you can, use silicone for the flex joint at the throttle body, the convoluted factory flex joints don't do anything to reduce air turbulence, although this would not be significant at other places in the system, it is right at the entry to the TB.
This fit under the factory hood? I’ve thought about doing something like this but was waiting until I had my hood back on the car so I could look at clearance
This fit under the factory hood? I’ve thought about doing something like this but was waiting until I had my hood back on the car so I could look at clearance
That’s awesome man. I really wish I had a complete tpi air intake. I’m missing the bottom part that actually holds the filters. At this point it’s cheaper to put together a “cai” than buy that piece though.
Not putting you down, but wouldn't it be better to run that "ram air" setup like Hawks sells over those convoluted tubes, especially since you haven't closed off the sides of the inlet area? Or are you only looking for a solid path for cold air?
Not putting you down, but wouldn't it be better to run that "ram air" setup like Hawks sells over those convoluted tubes, especially since you haven't closed off the sides of the inlet area? Or are you only looking for a solid path for cold air?
What Hawks sells is nowhere close to a "ram air" it's big ole slow box.
On the sides of the grille opening where the convoluted tubes are, you can see the radiator. I guess by your replies you're only looking for cold air not not "ram air"
On the sides of the grille opening where the convoluted tubes are, you can see the radiator. I guess by your replies you're only looking for cold air not not "ram air"
That would be ram air. It's 4" pipe raming the air into the lid.
Cold air would be hanging one of those ugly tubes off the TB and pointing it towards the ground with a filter on the end.
Not putting you down, but wouldn't it be better to run that "ram air" setup like Hawks sells over those convoluted tubes, especially since you haven't closed off the sides of the inlet area? Or are you only looking for a solid path for cold air?
Im genuinely curious about what hawks product you’re talking about
lol that’s new to me. Looks like something that belongs on on your home.
The "house" ducts fill the grille area of the IROC. It looks sort of DIY but I can see how it would yield results.
In the OP's case, it looks to be a pair of ducts from the Speedway Motors catalog. The kind of thing that makes it's way on to the circle track cars. I'm guessing, but I'd say that's a 90° inlet fitting in the grill and then up (through the corrugated tubing) to the filter housing. Very effective. And it doesn't look like it came from Home Depot.
EDIT: I see it's not a 90 fitting as the pipe attaches directly to back of the "frame". But the result is the same. Ram air. Fresh air.
All due respect i am a numbers guy. I trust Chad tho, but i just like to see quantifiable data. Also wanted to see actual drivetrain loss from engine dyno to chassis dyno lol always been my curiousity
That was a little tongue in cheek there Mr Orr. If you know anything about me it's my pursuit of quantifiable data. I'm a numbers guy too. I'd prefer a little more hands on at the moment but that'll have to wait.
Still, what Chad has built is something I've considered pursuing for a while. That or cowl induction.
I swear it's pulling major air. I think I can hear it. Tuner told me to take a drive tomorrow. If my MAP is 101 I did good. If it's over, I'm a bad ***. lol
Ya, I'll bet you do feel a big difference.