You are currently viewing our community as a guest, which gives you limited access to view most discussions and access our other features. By joining our Member Supported community you will have access to post topics, communicate privately with other members (PM), respond to polls, upload photos, content and access many other special features. Registration is fast, simple and absolutely free so please, join our community today!
If you have any problems with the registration process or your account login, please contact us.
Engine & DrivetrainDiscussions about the engine and drivetrain of your vehicle.
This is a discussion thread titled "Why didn't headers make any power?", within the Engine & Drivetrain forum, part of the Technical & Vehicle Assistance Forums category.
If I've learned anything from this website, it's not to mess around with the stock exhaust. My only plans for our 2005 Sequoia is a set of ceramic coated JBA headers when they become available.
__________________ 2005 Toyota Tacoma Double Cab 4X4
Speedway Blue Short Bed w/TRD Off Road Package, 2006 Tundra Wheels with 265/75R16 BFG AT KO's, Python 2-Way Remote Starter, Color Matched Hard Tonneau Cover
If I've learned anything from this website, it's not to mess around with the stock exhaust. My only plans for our 2005 Sequoia is a set of ceramic coated JBA headers when they become available.
thats a good choice....
__________________
2008 Toyota Tundra Double Cab Limited with TRD Off-Road Package..Desert Sand Mica Color...
Mods:Viper 5500 Remote Start, Volant CAI, TRD Sway Bar, Corsa Sport Exhaust System
JBA Headers
_____________________________________________
2008 Toyota Tundra TRD Off-Road
1995 C4 Corvette Admiral Blue
2006 Nissan Pathfinder LE
2007 Kawasaki Ninja ZX10 Special Edition<--SOLD
2003 CBR 954 RR - Track Bike
SERENITY- 4 Wheels Move The Body, 2 Wheels Move The Soul...
How about Borla as well? Forgot to add that in my previous post.
Probably but insufficient data to say definitely. The flow bench data I saw for Borla looked close to Dynomax's flow bench numbers and the few people here who have installed just a Borla muffler (not the whole catback) seem to have good things to say about it. I can't recall reading any solid credible reports (with some kind of objective data (dyno numbers, 0 to 60 times, etc)...not subjective impressions like "butt-dyno") regarding actual performance from Borla mufflers. And IIRC Borla mufflers are quite a bit pricier than the rest...probably one reason so few people have installed one.
__________________ Ray
Natural White '03 Access Cab V8 SR5 4X4 with TRD Off Road Suspension, Limited Slip Differential, and Towing Package
Towing & Performance Mods: JBA Headers, Gibson Muffler, 4.30 gears, Michelin LTX M/S Tires, Hellwig Anti-Roll bar, Prodigy Trailer Brake Controller, Autometer Z-Series Transmission Temperature Gauge, Magnefine Transmission Filter
Utility & Misc Mods: Genuine Toyota OEM Step (Nerf) bars, Peragon Tonneau Cover, TracRac Rack and Rail System, Muth Signal Mirrors, Pop&Lock tailgate lock, TruSpeed speedometer calibrator, "$20" RS-3200 Upgrade, Auto-Dimming mirror w/ Temp and Compass, Clear/Red/Clear Taillights with Silverstar Signal bulbs, 3M Clear Bra
Interesting. I installed a Flowmaster setup and when I lined up next to my buddies identical Tundra with stock exhaust I walked him by a 3/4 truck length up to 80mph every single time. Even if he got the jump off the line I would catch him and pull him. Once he installed the same Flowmaster setup we were neck and neck. Good sound , good quality, and no doubt an performance increase.
No hard dyno numbers (I only dyno the GS) but the real world performance is proven to me.
__________________
2000 Toyota Tundra 2WD Cab, nerfs, 2.75" lift, Ivan Stewart 4wd shocks, rear sway, spray on liner,S&S headers/Y-Pipe, ASP crank pulleys, drilled/slotted rotors, Flowmaster exhaust, 4.10 gears with LSD. bumper grill guard, SELLING
1998 GS400, 506hp, supercharged/intercooled with everything (sold)
2002 SC430 with a great many mods
2004 GX470 with many mods
Interesting. I installed a Flowmaster setup and when I lined up next to my buddies identical Tundra with stock exhaust I walked him by a 3/4 truck length up to 80mph every single time. Even if he got the jump off the line I would catch him and pull him. Once he installed the same Flowmaster setup we were neck and neck. Good sound , good quality, and no doubt an performance increase.
No hard dyno numbers (I only dyno the GS) but the real world performance is proven to me.
I agree! I'm running the "dreaded dual exhaust" and my Tundra runs better than it ever has. I also have the "restrictive" TRD air filter and a few other no-no's. No telling how much power I would gain if I went back to stock!
__________________ ADDING POWER HAS NEVER BEEN SO FAST!
Loosing low end power would not hurt that much for off-roading... I turn off overdrive and usually run at 2500-3200 rpms and thats when the headers, K&N FIPK, and cat back exhaust would kick in to get the most power.
Quote:
Originally Posted by Dude Boy
I agree! I'm running the "dreaded dual exhaust" and my Tundra runs better than it ever has. I also have the "restrictive" TRD air filter and a few other no-no's. No telling how much power I would gain if I went back to stock!
My Flowmaster setup is a cat back single to muffler ,then to duals out the back. Not the duals available on ebay and elsewhere.
__________________
2000 Toyota Tundra 2WD Cab, nerfs, 2.75" lift, Ivan Stewart 4wd shocks, rear sway, spray on liner,S&S headers/Y-Pipe, ASP crank pulleys, drilled/slotted rotors, Flowmaster exhaust, 4.10 gears with LSD. bumper grill guard, SELLING
1998 GS400, 506hp, supercharged/intercooled with everything (sold)
2002 SC430 with a great many mods
2004 GX470 with many mods
How about Borla as well? Forgot to add that in my previous post.
i have had good luck with my borla. I have just the single stock config cat-back. I don't think the pipe is any larger than stock. It does sound sweet though. I am not into it enough to get it on the dyno. It looks good, sounds good, not a spot of rust after years of chicago winters, drop the hammer it takes off, good enough for me.
__________________
2001 SR5 TRD Thunder Gray 4X4 Access Cab V8, TRD Luxury Sport Package, TRD Spec HD Red/Blue Shocks, Borla Exhaust, GT GEM TOP Classic color matched tonneau, LINE-X Bed liner, Auto-Dim mirror with temp and compass, Custom Stereo (NAK 45z CD, MB quart Premium Line 6.5m all 4 doors, Custom built angled and padded armrest sub box with 2 JL Audio 8” subs (8W3-V2-D4), (2) 2ch Alpine power amps), (1) 2ch phoenix gold power amp with volt meter display. PIAA Platinum super white headlight and fog lights. Fog light mod, D31m Blue top Optima, LTX A/T 265/75/16 tires
alright after racking up about 1200 miles with this setup (Gibson Headers+exhaust) I came to this conclusion..... I dont think i lost any bottom end power, but i do think I gained a little top end power. With the headers/exhaust and drop in K&N i can pull dead even with a 05' 4x4 xtracab V6 tacoma, from a light and going on a drop . the truck is REALLY LOUD, but I love it, I always get funny looks from Chevy and Ford truck owners when they hear the rumbe their trucks aren't making..... I'm going to do unichip and possibly start looking for a used TRD S/C. I just did Powerslot rotors and hawk pads, man i have the mod bug!!!!!!!
One thing you guys are totally missing is that if you install headers, you need to get the PCM tuned. Headers will mess up your A/F ratio (air/fuel). Take your truck to a reputable tuner with a dyno.
One thing you guys are totally missing is that if you install headers, you need to get the PCM tuned. Headers will mess up your A/F ratio (air/fuel). Take your truck to a reputable tuner with a dyno.
First of all, the Tundra's stock ECU (PCM) is generally not considered tunable...certainly not by your neighborhood tuner...Toyota has never released the code needed to tune it. Only the aftermarket units (Unichip) can be tuned. Allegedly Jet has broken the Toyota code but I have major doubts about how well they did it.
And in any case, tuning is simply not needed after header (or intake install). Yes, the headers do necessitate some A/F ratio adjustment but the stock ECU self-tunes itself by comparing inputs from the Mass Air Flow sensor/stored fuel maps to inputs from the 02 sensors. It adjusts the mixture so that the 02 sensors show proper (14.7:1) mix in closed loop operations and then stores those adjustments in the short term fuel trims. On each shutdown, a percentage of the short term fuel trim values is transferred to the long term fuel trims. On each start, the long term fuel trims are applied to the stored fuel maps to produce the initial mixtures...and then the process starts all over again. Eventually (after about 500 miles) this self-adjusting process produces the exact A/F ratio needed for proper operation with the headers.
__________________ Ray
Natural White '03 Access Cab V8 SR5 4X4 with TRD Off Road Suspension, Limited Slip Differential, and Towing Package
Towing & Performance Mods: JBA Headers, Gibson Muffler, 4.30 gears, Michelin LTX M/S Tires, Hellwig Anti-Roll bar, Prodigy Trailer Brake Controller, Autometer Z-Series Transmission Temperature Gauge, Magnefine Transmission Filter
Utility & Misc Mods: Genuine Toyota OEM Step (Nerf) bars, Peragon Tonneau Cover, TracRac Rack and Rail System, Muth Signal Mirrors, Pop&Lock tailgate lock, TruSpeed speedometer calibrator, "$20" RS-3200 Upgrade, Auto-Dimming mirror w/ Temp and Compass, Clear/Red/Clear Taillights with Silverstar Signal bulbs, 3M Clear Bra
So, to answer the original question then, you may see increase in power as the PCM adjusts itself. You may need to drive more than 150 mile before you notice any real change.
Man do I feel bad about putting this flowmaster on . But i was concidering changing it out for something else any ways. So I guess it's spintech HUH?
Good news is the flowy was free and install was done by a buddy, so out no $
Any one know a part # or name of the spintech I should get???? I have never used anything but Flowmaster.
__________________ '05 Tundra DC TRD 2 WHL: The TOW truck, Spectra Mica Blue, with Kenwood H/U, Kenwood Amp and crossover. Infinity 6010cs, 10" Rockford SUB, 6 disc CD Changer mounted in Center console, SWI-X to retain steering wheel controls, 7" TV with DVD. Tinted Windows, Three chamber Flowmaster, Painted front chrome strip
1994 Toy: The TOY Standard cab, Long travel front pulling13" w/Double fox w/Res, Deaver rear at 18" w/Single 2.5 18" fox w/Res., full glass, Bumper to Bumper cage, Gusseted frame, PRP seats, Crow harnesses, Custom steering(All Heims & Chromoly), Grant steering wheel, Smoothest ride around. OH by the way only 70,000 miles.
You hurt my feelings
. But i was concidering changing it out for something else any ways. So I guess it's spintech HUH? 
'05 Tundra DC TRD 2 WHL: The TOW truck, Spectra Mica Blue, with Kenwood H/U, Kenwood Amp and crossover. Infinity 6010cs, 10" Rockford SUB, 6 disc CD Changer mounted in Center console, SWI-X to retain steering wheel controls, 7" TV with DVD. Tinted Windows, Three chamber Flowmaster, Painted front chrome strip 
1994 Toy: