So I've got like 2K miles on my new JBA headers with stock pipes and I can notice a loss in low end power. It does have a good increase in power in the upper RPM ranges but I spend most of my time under 60mph running around town. Instead of jumping off the line with minimal throttle, I gotta floor it now, which is when it makes power, but its killing my gas milage.
Any thoughts as to how I can get some of that low-end back?
Headers should have given you the opposite result. Is that the only mod you made? The only time I felt a low-end loss is when I installed a cold air set up and a 2 1/2" cat back exhaust. When I installed my headers I instantly felt a low end power increase.
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2001 Tundra TRD Access Cab 4x4, SAW/Camburg coilovers, TC diff drop kit, Wheeler's Offroad AAL and Bilstein 5100's, LT265/75R16 BFG AT KO on Wheeler's black alloys, True Flow intake tube and filter with a modded air box, JBA titanium coated headers, Magnaflow 11226 muffler with stainless steel pipes and resonator removed, Skidrow front skidplate with custom made aluminum side shields, extended rear diff breather hose, Hawk LTS brake pads, Wheelers stainless brake hose kit, Helweig swaybar, Downey Offroad front swaybar link kit and cv joint boots,TRD "posi" 3rd member, debadged, backseat-power outlet-map lamp-taillight mod, Optima red top, TRD mirror covers painted flat black, Viair 300P air compressor, blacked out mouldings, bumpers and grille emblem
2nd that on the increase in low end with headers. my magnaflow catback killed mine but went back to stock intake and DT headers and it came back
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2005 Silver Sky Texas Edition DC SR5 w/moonroof, 20" rims, Magnaflow Catback, Doug Thorley Headers, Tuned Unichip, Downey FSB Endlinks w/ES Bushings, Downey HD Off Road Skid Plate, Hellwig RSB, Total Chaos Steering Rack Bushings, TRD Springs, Bilstein 5100 x 4, ASP Underdrive Pulley, Bazooka VSE, Panasonic CQ-C8803U w/bluetooth/Sirius, Polk 6750, Polk 675, 6000K H/L HID, 6000K HID Fog Lights, Sanded Out Gauge Cluster, LED Cool White Bulbs up top and blue down low, All LED Exterior Bulbs, TRD Mesh Grille Insert, Scangauge II.
2005 Lunar Mist Camry LE, Custom Leather, TRD Strut Bar, TRD Rear Sway Bar, SS Ultra Beams, K&N AF,
JVC KW-AVX720 w/Sirius, Polk 690
No obviously leaks or loose nuts. Everything looks and sounds good. I used new OEM gaskets and locknuts. Whats funny is, sometimes, the thing takes off the line like a bat outta hell. Other times, it takes a footfull to get the thing to haul. Perhaps the computer is still mapping?
Also, I've got an 18" MagnaFlow muffler that I bought and haven't installed yet. Should I not? I don't really want any additional exhaust tone, but I would weld it on in a second if it would help any..... Thoughts?
Update: I replaced the dirty K&N drop-in air filter with a new OEM one, cleaned the MAF sensor, and changed the oil. I also drained a little bit of the stock coolant out and replaced it with straight non-diluted Prestone to richen up the coolant.
It now runs a lot better, with the constant power increases that I expected with the addition of headers. I don't think it was breathing properly, and was running hot.
When there was discussion between the JBA/DT headers I think the JBA's were known for the high end power and the DT's made their power in the low end rpm's.
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SR5 5.7 Crew Max 2WD
Airaid CAI
Borla Dual Exhaust
Doug Thorley Headers
Undercover tonneu cover
Kenwood KDC-MP38U/Alpine 6 3/4 speakers
Luverne SS running boards
Homelink Mirror
TRD Sway Bar
TRD Sport shifter
Amsoil oil/rear diff fluid
One fellow "Socialstar" with a Unichip found while tuning that the JBAs offered little improvement but the DTs were better. Hopefully he sees this thread and can comment.
Low-end loss with headers
Re: Low-end loss with headers
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