JBA HEADERS and EXHAUST DYNO RESULTS - Toyota Tundra Forums : Tundra Solutions Forum

07TundraFUN · #1 (**permalink**) 10-28-2007, 04:27 AM

Stock dyno was around 310 hp to the wheels. With the cat back on it was 340 to the wheels My jaw dropped!! then last night with the headers and cat back it dynoed 360 to the wheels and 387 torq the truck is a monster right now and sounds great. Talk about gains!! Ill get the graphs scanned when I come back from sema

JBA Performance Exhaust Featured Product:: Toyota Tundra 5.7L and 4.7L Trucks

kingfishhead · #2 (**permalink**) 10-28-2007, 10:46 AM

From the toyota site

5.7L DOHC 32V i-FORCE V8 with Dual Independent Variable Valve Timing with Intelligence (VVT-i)
381 Horsepower @ 5600 rpm

Your truck dynoed out at 73HP less than factory or is the factory at the motor and not at the wheels?

Mr. Creosote · #3 (**permalink**) 10-28-2007, 10:49 AM

The factory is not at the wheels.

07TundraFUN · #4 (**permalink**) 10-29-2007, 02:45 AM

Quote:

Originally Posted by Burger Steak & Eggs

The factory is not at the wheels.

Exactly All auto manufactures ratings are that the flywheel not the wheels and to see these kinds of gains at the wheels is pretty amazing

07 firecrew · #5 (**permalink**) 10-29-2007, 07:05 PM

how does a catback make 30hp and the headers just make 20hp, are you sure about those numbers?

07TundraFUN · #6 (**permalink**) 10-30-2007, 05:07 AM

Quote:

Originally Posted by 07 firecrew

how does a catback make 30hp and the headers just make 20hp, are you sure about those numbers?

yep 100%maybe since I went to the dual instead of the single. I was there for the dynos

KetelOne · #7 (**permalink**) 10-30-2007, 09:04 PM

Did you install the headers or did JBA? Just wondering if its a PITA to install.

07TundraFUN · #8 (**permalink**) 10-31-2007, 01:20 AM

Quote:

Originally Posted by KetelOne

Did you install the headers or did JBA? Just wondering if its a PITA to install.

JBA did the install

valant_94gt · #9 (**permalink**) 10-31-2007, 03:07 AM

Price is ?

those gains are (if true) amazing !

I can just imagine an added 50whp on my DCRB.

So with a intake system it should be right up to 380whp.

Just wait till their is a programmer...

I'm sure i'm going to hold off right now on purchasing anything for my Tundy, at least until prices drop a bit.

Good numbers, now on to the pics, and maybe a sound clip ?

07TundraFUN · #10 (**permalink**) 11-01-2007, 03:25 AM

yep ill get some when I come home from sema

123Gone · #11 (**permalink**) 11-01-2007, 11:48 AM

360 HP at the rear wheels is about 450 HP at the flywheel assuming a 20% auto transmission drivetrain loss.

StealthZ · #12 (**permalink**) 11-02-2007, 12:37 PM

Quote:

Originally Posted by 07TundraFUN

Stock dyno was around 310 hp to the wheels. With the cat back on it was 340 to the wheels My jaw dropped!! then last night with the headers and cat back it dynoed 360 to the wheels and 387 torq the truck is a monster right now and sounds great. Talk about gains!! Ill get the graphs scanned when I come back from sema

JBA Performance Exhaust Featured Product:: Toyota Tundra 5.7L and 4.7L Trucks

Dyno charts please! That's 30 whp and 60 ft/lb torque more than anyone else has made that I can find.

123Gone · #13 (**permalink**) 11-02-2007, 01:10 PM

Another questions: Are the numbers SAE corrected?

NOLA_1906 · #14 (**permalink**) 11-02-2007, 01:59 PM

Those numbers are totally unbelievable. Literally. There is no way that a simple cat back, JBA no less, gave you 30 whp and then headers added another 20 whp for a total of 50 whp. The stock exhaust would have to be stuffed with potatoes to be that restrictive. You would be lucky to get 30whp from intake, exhaust and headers combined. Waiting for dynos...

123Gone · #15 (**permalink**) 11-02-2007, 02:10 PM

Well, I dunno, maybe. My Vette's engine (5.7 liter) obviously is not the same as Toyota's 5.7, but with headers, high flow air filter, and dyno tuning software went from the factory 350 HP to 403 HP (at the flywheel).