Ladies and gentlemen, I'm sure this has been talked about in the past for as you can tell I've recently just become active on this forum. I didn't bother changing these items out on my 14' TEP but I feel like I have less power in my 17' TRDORP. I am pushing the same size tires as I had on my 14' I just don't feel the power in the 17'. I want to see what other people might be running as combos for their aftermarket exhaust and cold air intake. I've youtubed some videos of the 5th gen exhaust sounds but it really is hard to tell because I find different videos of the same exhaust set up yet they sound differently. If anyone has a video clip of their combo that would be sweet to. I know my 4runner will never be a hot rod but man I don't remember getting on the highway and feeling like I had no power.
Aftermarket Exhaust / Cold Air Intake
- Thread starter chad08
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Engineer
New member
Same lift/wheels & tires on your 14? I know you said size is the same
There will always be some variations between engines and output but i doubt its anything you could measure outside of a engine lab/dyno. If you did have the same mods then my guess is its your perception, don't expect and exhaust and air intake to help by the butt dyno.
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There will always be some variations between engines and output but i doubt its anything you could measure outside of a engine lab/dyno. If you did have the same mods then my guess is its your perception, don't expect and exhaust and air intake to help by the butt dyno.
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Noted. I'm putting mine on a road trip come this weekend to Colorado and I will track my mileage and how she runs power wise through the mountains that way I know what my next mod is when I get back. I really want to do my lights but power might be more important to me
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Engineer
New member
What makes the 17 heavier?
I'm running a 295/55R20 now. Was running a 285/65R18 before. 32.6" to 32.8" so not really a huge difference.
I wouldn't focus so much on the diameter of the tire, but the weight of your wheel/tire combo. If what you're running now is heavier, it could be noticeable especially since you're multiplying that by 4.
Incorrect. The 2014 Trail curb weight is the exact same as a 2018 TRD Off-Road, 4750lbs. And every year between.
Source:
2014: https://pressroom.toyota.com/toyota/2014+toyota+4runner+product+specs.download
2018: https://www.toyota.com/4runner/features/exterior/8642/8646/8670
So I just did some googling:
Toyo MT 295/55/20: 72lbs (holy crap, that's a heavy tire)
20" XD grenades: 38lbs
110lbs wheel/tire
168lbs over stock (for all 4)
That is a heavy combo. You're paying the consequences in the way it drives now.
For comparison
Stock setup:
TRD ORP/Trail OEM wheels: 29lbs
GRANDTREK AT20 - SIZE: P265/70R17 - 39lbs
68lbs wheel/tire combo
My setup
BFG KO2 285/70/17: 58lbs
Konig Countersteer type X: 20.5lbs
78.5lbs wheel/tire
42lbs total over stock (for 4)
Intake and exhaust will provide a negligible amount of performance.
The OEM intake is already cold-air, so any upgrade to that will just make it louder, but not actually appreciably faster. Exhaust is the same. I did an exhaust because I wanted to reroute the pipe but I didn't notice a performance increase.
Toyo MT 295/55/20: 72lbs (holy crap, that's a heavy tire)
20" XD grenades: 38lbs
110lbs wheel/tire
168lbs over stock (for all 4)
That is a heavy combo. You're paying the consequences in the way it drives now.
For comparison
Stock setup:
TRD ORP/Trail OEM wheels: 29lbs
GRANDTREK AT20 - SIZE: P265/70R17 - 39lbs
68lbs wheel/tire combo
My setup
BFG KO2 285/70/17: 58lbs
Konig Countersteer type X: 20.5lbs
78.5lbs wheel/tire
42lbs total over stock (for 4)
Intake and exhaust will provide a negligible amount of performance.
The OEM intake is already cold-air, so any upgrade to that will just make it louder, but not actually appreciably faster. Exhaust is the same. I did an exhaust because I wanted to reroute the pipe but I didn't notice a performance increase.
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Thanks for the pointer on that. I knew I was going to a heavier combo, but the combo I had before was 91 pounds. I guess 76 pounds more for the set of four makes a bigger difference than I thought. I know that about the COI, I'm just wondering if say the K&N or maybe an AFE (not sure of anyone with one on the 4Runner but I had on several other trucks and loved it) would just upgrade even 5-10 HP and then with an exhaust. I feel like even 15 HP total would be huge for moving this tank.
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In all my previous vehicles with bumpers, skids, etc. The single biggest notice at the pedal was my wheel/tire combo.
I added an AFE CAI on my FJ and I didn't really notice the difference. There was a kind of placebo effect in that it was louder. Theoretically I suppose a flat filter vs. a conical filter could make a difference. I don't know if anyone has done a dyno before and after each to measure. It may add some power but high cost per horsepower.
Another thing you could consider is a sprint booster or other throttle position modifier. It adds no power but makes it to where you don't have to mash the skinny pedal. For some it makes the 4Runner's power more palatable.
Best of luck man!
thanks bud. I just noticed you are another Texan on here. Where about in Austin are you at? I'm in Bulverde just north of San Antonio.
I'm north side about 2 miles west on Parmer from MoPac. Maybe I'll see you around sometime!
delloro
New member
I can't tell the difference in performance with a friend in the car, and they all weigh more than that.
Grug556
New member
Its unsprung weight that your not calculating. Everything above in the cabin has less impact than wheels and other components in the suspension that add weight..while diminishing acceleration, braking, handling etc.
I have the URD Off Road Y-Pipe on my 17' TRD Pro. It removes the rear catalytic converters and eliminates the dreaded "crimp" on the stock Y-Pipe. I also have a TRD Intake.
With 10,000 miles on the motor with full steel RCI skids plus the gas tank skid, Gobi Stealth Rack and Shrockworks sliders, I'm averaging 16.5 mpg with 50% city and 50% highway driving on pavement only.
With 10,000 miles on the motor with full steel RCI skids plus the gas tank skid, Gobi Stealth Rack and Shrockworks sliders, I'm averaging 16.5 mpg with 50% city and 50% highway driving on pavement only.
