How much horsepower and torque do I have? - TundraTalk.net - Toyota Tundra Discussion Forum
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#1 (permalink) Old 03-02-2012, 01:51 AM
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How much horsepower and torque do I have?

I have a 2007 DC 5.7 with a TRD exhaust and a aFe stage 2 Si intake. Does anyone know a round about number of horsepower and torque I have?
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#2 (permalink) Old 03-02-2012, 02:14 AM
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381 hp @ 5600 rpm; 401 lb.-ft. @ 3600 rpm


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#3 (permalink) Old 03-02-2012, 03:22 AM
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Originally Posted by Toxarch View Post
381 hp @ 5600 rpm; 401 lb.-ft. @ 3600 rpm
LMFAO!!!

But seriously hes probably right. Only your 381hp/401lb may be achieved at a slightly different RPM after the mods. Sorry man, but toyota did a pretty good job with our intake and exhaust in stock form Ive learned from the absolutely ridiculous amount of research Ive done.

Id say at most you bolted on about 15hp best case scenario. Hey... at least it sounds badass right?

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#4 (permalink) Old 03-02-2012, 03:46 AM
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Thanks for the reply but aren't those stock hp and torque ratings? I'm just not sure how much the upgraded exhaust and aFe intake give me. You can defiantly feel the difference.
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#5 (permalink) Old 03-02-2012, 04:19 AM
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Originally Posted by Vanswey View Post
Thanks for the reply but aren't those stock hp and torque ratings? I'm just not sure how much the upgraded exhaust and aFe intake give me. You can defiantly feel the difference.
Exactly Youre peak numbers are probably very close to stock however you have more torque in a lower rpm range which is why you feel it. Thats the trick aftermarket companies tend to use often. Its very difficult to improve power across the board so they rob from upper where most people wouldnt notice it and give that power to the low end so you have more useable and noticeable power. Look up some dyno graphs of aftermarket exhaust and intake on the 5.7 and you'll see what I mean.

Better yet heres TRD exhaust dyno sheet after a couple attempts so this is best case scenario.



It shows a "Slight" increase over stock and dosent rob to give but most cheap exhaust looks kinda like this (maybe not so extreme but still the same idea)




(I know this dyno sheet isnt from a tundra, Im just trying to make the point clear)

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Last edited by fishinfirefighter; 03-02-2012 at 04:25 AM.
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#6 (permalink) Old 03-02-2012, 04:24 AM
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Aftermarket intake will be much closer to the second dyno sheet than the trd exhaust that was properly engineered.

2011 DC 5.7 4x4 Tow Lexus Starfire Pearl white Color matched handles, mirrors, bumpers and grill surround, air bags, 6" lift, 20" Rockstars w/35" Nitto Dune Grapplers, Bushwacker pockets, BHLM w/Oracle Halos, AMP power steps, Pioneer AVHP-4300DVD, 1200watt RMS brutus amp, 2 12" ib flats, Zxi 150.4 Zeus amp to focal components front and rear. FETC #15
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#7 (permalink) Old 03-02-2012, 11:25 AM
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Sounds like someone needs a supercharger.

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#8 (permalink) Old 03-02-2012, 12:14 PM
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Yes, you could have as much as 10 or so extra hp and as much as 10 or so extra pounds of torque. It does not materialize out of thin air though. This is not on top of factory ratings. This is whatever extra out of that makes it to the rear wheels from the engine. But realize, when they take these measurements they are doing it in a strictly controlled environment designed to squeeze out a few extra ponies at the wheels when everything is optimized. This means on a dyno at high rpm, in the perfect gear, temperature controlled, hood up, maybe a little extra air blowing on the engine. What it usually means in my experience is that the vehicle will pull with a little more urgency if you floor it at highway speeds but that's about it. Not much use stoplight to stoplight.

And before you ask, no, the advertised rating on the box plus for the exhaust plus the advertised rating on the box for the intake won't equal the improvement you will see at the wheels. Just doesn't work that way. There are plenty of setups with both that still only have 5-10 extra hp.

The cost of fuel to operate a 6000 pound 400 horsepower half ton that does 0-60 in under 7 seconds is kind of like the price of oil changes for a Porche 911. If you have to ask you probably can't afford it.

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#9 (permalink) Old 03-02-2012, 12:23 PM
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How about MPG with the exhaust and intake?
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#10 (permalink) Old 03-02-2012, 01:44 PM
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504/550?
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#11 (permalink) Old 03-02-2012, 03:15 PM
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All they will do is move the power curve a little. You lose some low end and gain a little high end.


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#12 (permalink) Old 03-02-2012, 07:17 PM
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most will gain in the upper rpm range, but you lose low end a lil...

all it does is shift where the power is.

for these trucks most cai's are not worth the $$, you can do a drop in and get about the same result.

alot of time the feel is the fact that the curve isn't as flat and has a higher peak...

in general tho most of the gains are at higher rpm than what is used typically every day.


it just is what it is.

if you really would like to know, get it dyno'd... we will all be interested in seeing what it is, however you do not have a baseline to go off of unless you find someone with a stock tundra with same gearing/tires to dyno on the same day...


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#13 (permalink) Old 03-02-2012, 07:24 PM
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600hp!!!!

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#14 (permalink) Old 03-02-2012, 10:05 PM
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600hp!!!!
That kind of HP takes a lot of performance stickers on the back window and bumper.


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#15 (permalink) Old 03-02-2012, 10:27 PM
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Originally Posted by TRDWarrior View Post
Sounds like someone needs a supercharger.
What I did and a little more to stop wasting time. Want a little gain of 5-15HP, try multiple add ons that may not give cumulative gain. Work on the bigger pic, and gains to go!!!!



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