Wolfman’s Brother
New member
Who needs before and after dyno charts with all this pep.
Pep city in this b.
Pep city in this b.
does exhaust do anything for 4runners?
- Thread starter iseeu1001
- Start date
I spent weeks researching this exact question. I looked and found dyno charts for every item i installed. I have a spectre cold air intake with an afe throttle body spacer(the thicker one), mbrp 2.5" exhaust and the sprint booster. I installed everything at different times to compare. here is my thoughts.
sprint booster, i wouldnt drive without it, it made it more fun to drive and lively.
the cold air intake and spacer were put on at the same time and the very next morning i noticed i was pulling the same hills in 5 converter locked that i was downshifting on before. It also comes to life around 3900 rpm and sounds like godzilla having an orgasm
the last piece was the exhaust, i got a great deal on the mbrp 2.5". It has a good sound, very quiet at idle but due to having a turn down over the axle for clearance and it resonating off the ground it is very bareable. it gives it a deep tone but when passing it gives you that v6 tone... but when passing all you can hear is the godzilla anyway
All in all every chart i found and all the research i did. top end power did not increase but maybe 2/3 hp. but i can tell you for a fact that lower and mid range this this has a bunch more torque and this things are made for that not high rpm. I also am running the stock tires still and averaging 19.5/20.5(combined) every fill up running 89. once my lift and 33s are put on i am of course expecting it to drop a couple points of course.
conclusion, do what makes you happy. I cant tell you i have wheeled with guys that had different exhausts than me and mine has sounded the best. i wheeled with a guy running a magnuson and it screamed more than whined... but i would not change my engine mods and have been happy with the performance.
sprint booster, i wouldnt drive without it, it made it more fun to drive and lively.
the cold air intake and spacer were put on at the same time and the very next morning i noticed i was pulling the same hills in 5 converter locked that i was downshifting on before. It also comes to life around 3900 rpm and sounds like godzilla having an orgasm
the last piece was the exhaust, i got a great deal on the mbrp 2.5". It has a good sound, very quiet at idle but due to having a turn down over the axle for clearance and it resonating off the ground it is very bareable. it gives it a deep tone but when passing it gives you that v6 tone... but when passing all you can hear is the godzilla anyway
All in all every chart i found and all the research i did. top end power did not increase but maybe 2/3 hp. but i can tell you for a fact that lower and mid range this this has a bunch more torque and this things are made for that not high rpm. I also am running the stock tires still and averaging 19.5/20.5(combined) every fill up running 89. once my lift and 33s are put on i am of course expecting it to drop a couple points of course.
conclusion, do what makes you happy. I cant tell you i have wheeled with guys that had different exhausts than me and mine has sounded the best. i wheeled with a guy running a magnuson and it screamed more than whined... but i would not change my engine mods and have been happy with the performance.
I spent weeks researching this exact question. I looked and found dyno charts for every item i installed. I have a spectre cold air intake with an afe throttle body spacer(the thicker one), mbrp 2.5" exhaust and the sprint booster. I installed everything at different times to compare. here is my thoughts.
sprint booster, i wouldnt drive without it, it made it more fun to drive and lively.
the cold air intake and spacer were put on at the same time and the very next morning i noticed i was pulling the same hills in 5 converter locked that i was downshifting on before. It also comes to life around 3900 rpm and sounds like godzilla having an orgasm
the last piece was the exhaust, i got a great deal on the mbrp 2.5". It has a good sound, very quiet at idle but due to having a turn down over the axle for clearance and it resonating off the ground it is very bareable. it gives it a deep tone but when passing it gives you that v6 tone... but when passing all you can hear is the godzilla anyway
All in all every chart i found and all the research i did. top end power did not increase but maybe 2/3 hp. but i can tell you for a fact that lower and mid range this this has a bunch more torque and this things are made for that not high rpm. I also am running the stock tires still and averaging 19.5/20.5(combined) every fill up running 89. once my lift and 33s are put on i am of course expecting it to drop a couple points of course.
conclusion, do what makes you happy. I cant tell you i have wheeled with guys that had different exhausts than me and mine has sounded the best. i wheeled with a guy running a magnuson and it screamed more than whined... but i would not change my engine mods and have been happy with the performance.
Hey,
Sorry to Zombie this thread, but it says the Spectre intake and spacer is illegal in California. Is it a noise issue? Emmisions?
I'm looking to slightly boost the low end torque on my 4R specifically so it stops down shifting from 5 to 4 on slight inclines. If you realllllllly granny drive it, you can get decent mileage, but thats the side benefit of a bit more power. The engine doesn't have to shift down. And when you need some grunt, its there. Especially if you boost the power naturally aspirated. I know the limitations of a 5700lb truck, but its sort of a hobby of mine to squeeze mileage out of cars that shouldn't get it.
how has it been since you made this upgrade? Reliability? Engine note? Filter issues etc.
Thanks.
Whippersnapper02
Senior Member
The 1GR has a charcoal filter just after the panel filter. The purpose is to stop any gas fumes from leaving the intake manifold and escaping into the atmosphere. Generally all aftermarket intakes delete it which is deleting an emissions part making it illegal.
Last edited:
Blue 4ever Runner
New member
I installed an AFE filter and removed the charcoal after filter. (I know I'm a bad boy). I didn't notice any difference in power. I installed a Borla muffler and it made a definite difference. Maybe it allowed the AFE to move more air in because more exhaust was getting out? I dunno but getting on the parkway and passing there is a definite increase in power and smoothness in acceleration. It's more than a "butt dyno" effect. My wife can feel it too. After installing a Sprint Booster the drivability of the 4Runner is so much more pleasant now. Is it a race car? Of course not but that's not what these vehicles are for. It now has decent passing power and the throttle response is like it should be, kinda like there's a cable to the throttle body and it actually responds right away.
Last i checked 5th gen 4runners are ~4400-4800 lbs curb weight. You could however be carrying an extra 1000 lbs or so and be within GVWR.
There isn't a lot of performance, tuning, dyno, et cetera information for 4Runners relative to certain other vehicles or Off-Road/Suspension/OV.
At the end of the day, and very much over simplified, with breathing mods if you can move more air mass in and out of the engine and alter the fuel and timing to make use of that air, you can make more power.
So, with proper tuning, breathing mods will change your engine's power curve. How much, and where, is dependent on tuning and characteristics of the mods.
If your 4runner is 2020+, tuning isn't yet an option.
As always, aftermarket parts always carry some amount and type of risk simply from not being the same part that the OE spent millions of dollars and thousands of hours validating. Additionally, by changing said part, you have changed the system, sub-system, assembly, etc.. and therefore potentially the interaction between parts or systems. However, in some cases, the aftermarket part proves to be a solution or even more robust than factory.
2021nightshade4x4
New member
There’s tons of things you can do that SUPPORT making more power, without actually making more power.
Sent from my iPhone using Tapatalk
Sent from my iPhone using Tapatalk
97BlackAckCL
Elite Member
Installing my Borla was a noticeable improvement as well, I actually chirped tire a few times after the install because I wasn't expecting the truck to be so responsive. Definitely not a racecar, but my Borla cat back was definitely one of my favorite and most satisfying mods that I've installed
85GT-79FJ40
New member
I have the Borla touring on mine and an AFE intake. Both were noticeable gains but not earth shattering. Very very slight mileage improvement. The Borla does drone a little after 2500 RPM or so. A long highway trip retrieving parts for my Mustang project going 85-90 for six hours had me kinda wishing I had kept the stock exhaust. But that was the only time. Probably should have just slowed down!
Redsoxx1918
New member
Well, better response does equal faster in a sense. Not that you're adding any power but the vehicle will be quicker to respond, and therefore, faster. If you and I are at a stoplight or side by side on the highway, and I'm running my sprint booster and you are not, and we both attempt to accelerate, my throttle plate will open quicker and my vehicle will downshift quicker and I'll probably pull ahead of you as the standard throttle mapping is very laggy.
Sent from my iPhone using Tapatalk
davem
New member
Akkording
Member
I did the URD Y pipe first then three months later added an exhaust. When I upgraded the muffler it really opened up my mid to top end even more. I still want a full catback Borla T and I'm pretty dang sure I would benefit from that upgrade but I still love the way it sounds and feels now. Just my experience and speculation.
Blue 4ever Runner
New member
I haven't noticed drone with my Borla but I very rarely go above 75 especially for extended periods so that might have something to do with it.
97BlackAckCL
Elite Member
I have the Borla Touring catback and it does not drone at all, my Wife doesn't even know that I put an aftermarket exhaust on my truck
Good to know. I was looking into that setup on my 2010.
Whippersnapper02
Senior Member
I heard a TRD exhaust the other day. It's only about as loud as FJs were. I really want one now.
thennen
New member
I’m guessing that would be extremely difficult to quantify, demonstrate, and prove. And if everything went your way, are we talking 0.1 second improvement to 60mph? I think once you learn your 4Runner’s gas pedal, you can get it to do what you want, pretty much. Plus, I’ve read that it learns about you, too. Mine seems to have done so.
rushrunner
New member
Does exhaust do anything for 4runners? YES!!!!!
Love the smell that comes from having the back-window down. Love it, love it, love it. :thumb:
Love the smell that comes from having the back-window down. Love it, love it, love it. :thumb:
