Hey former neighbor, just had Guiseppe's the other night. I took it to Akron Horsepower. Eric is a really good dude and seems to be the master when it comes to mustangs. They do some wild mods there(1800+ hp)
Oh forgot about those guys.My best buddy used to live across the street from him.Are you from the lakes or did you move there?I grew up on S.Turkeyfoot.
I'm a Comet my self 1987.Seems like a life time ago.I may have hijacket your thread sorry
Thanks for taking the time to do this. I'd also like to thank the Mods for banning TNK so we didn't have to hear about how a pantyhose CAI wouldn't work either.
__________________
2007 5.7 TUNDRA DC 4X4\Flowmaster Muffler\Billet Grille\Baja Design Fog Lights\Volant CAI\6" Pro Comp Stage II\ 325x65x18 BFG's\Unichip
Thanks for sharing my friend, makes me feel even better about my mods. Can't wait til we are able to tune these things, so far I've heard superchips and one other company I can't think of right now are working on something.
The newer vehicles actually do some fuel triming at WOT, so its not completely open-loop. The first I've read of this was the early 2000's Ford lightening.
Hard to say waht Toyota does with there computers??
I heard something about using the part throttle closed loop trim extrapolated to WOT conditions.
Those numbers are at the wheels remember, so it makes them look even better. Thanks for proving what I knew all along, but many others doubted. I did nearly this exact same thing with my V8 4Runner but in addition, I tuned the air-fuel ratios as well. I got the same results as you. Larger gains with the intake, but a little more power with exhaust. I agree, they do need tuned as well -- 11:1 at WOT is pretty rich...
The massive low end improvements you realized are especially important, since this is the area the 4.7 seems to be weakest.
I'm not being negative or anything, I think your gains are Great!
But I did noticed on the K&N site that the picture shows that its a "boxless design" that uses the hood to seal the top from hot engine heat, but if the hood is open on the dyno runs....then it is sucking cool air from All 360 degrees. Now with the hood closed (such as when driving) you are mostly getting air from the fender hole(I believe). With the stock filter box assembly it makes little diffference in cfm if the hood is up or down.
I wonder if that would explain the extraordinary power difference.
It would be interesting if someone does a closed hood run with the same cai
Anyway NICE gains
ya but with the truck moving the faster it goes the more power the intake makes
__________________ 07 Salsa Red Pearl 5.7 DC..TRD, Leather, JBL radio. MODS: Readylift...20 inch chrome Ultra Goliaths...Nitto Grapplers 305/55/20...Volant Intake...TRD Shifter...Led's
Well I had a little extra time on my hands this month so I thought it would be a good time to do some dyno runs. I'm not claiming to be an expert at engine tuning nor on the products tested so take this material for what it's worth. I have a crewmax 4x with the 5.7L engine with almost 9k miles running Mobile 1 oil. My truck has bigger tires so for you who think the numbers are lower than expected take that into consideration. I had asked the operator of the dyno if the tires made a differance and he didn't think it would make much. I had a number of pulls performed on my truck with different configurations. Another thing to keep in mind is our elevation here is just over 1000 ft above sea level.
1) Stock truck
2) K&N cold air intake with the stock exhaust
3)K&N cold air intake with a JBA dual exhaust
4)K&N cold air intake with a JBA dual exhaust and opening a vent between the Mass Air Sensor and the Throttle Body.(to try and lean out the truck)
My personal experience is that the K&N made a noticable differance in drivability and performance. I think this mod was worth the money.
The exhaust would have worked better if their was a way to lean out these trucks (programmer, adjustable mass air sensor, etc) as for drivability with the exhaust I feel that fuel consumption has increased without running the truck any different.
I think so. Corvette owners ran into this problem. Algorhythms must be modified via LS1 Edit software in order to get proper air/fuel ratios across the band.
It's possible that the computer's algorhythms can't compensate for the increased air flow.
Quote:
Originally Posted by 123Gone
I think so. Corvette owners ran into this problem. Algorhythms must be modified via LS1 Edit software in order to get proper air/fuel ratios across the band.
The algorithms used by the ECU are more than capable of producing correct air:fuel ratio, even with engine modifications. Mass air flow sensors are used for very good reason in EFI engines. If the intake and exhaust are modified to allow more air flow, that extra mass of air has to be pulled through the MAF sensor, so it is measured and accounted for in fueling. What it is in need of is a simple tweak to a scalar to get WOT fueling correct. In low to medium load, in closed loop, the ECU could make a correction probably about 20% in either direction, but at WOT it is likely that it makes small trim corrections if any. Extra airflow is still measured and fueled, but the factory commanded AFR is pretty rich to keep things safe.
when I was at the toyota dealership, they had portable computers to plug into the trucks. I read somewhere on this site in the toyota service bulletin that the trucks could be "flashed". It would be nice to know someone at the dealership that might have information on this and if it is possible to flash these trucks for different parameters.
I don't think that they get so in depth with the dealership programmers. Those are more for customizing features like keyless entry parameters and such.
Thanks for taking the time to do this. I'd also like to thank the Mods for banning TNK so we didn't have to hear about how a pantyhose CAI wouldn't work either.
THUNDERA Re: MODS+DYNO Results
Quote:
Originally Posted by KetelOne Thanks for taking the time to do this. I'd also like to thank the Mods for banning TNK so we didn't have to hear about how a pantyhose CAI wouldn't work either.
Great post. Always like to see things measured out by some type of standard. A Dyno sure does present a standard, before, and after picture.
I realize dyno runs generally are not free, but is there any likelyhood you could run another after a few thousand miles? I would be interested to see what the perfromance numbers are after the "Adaptive Memory" of the Tondra ECU has had a chance to adjust to the modifications.
Once again, thanks for posting your work. It adds a lot of value to this forum.
Frank
Last edited by daless2; 10-19-2007 at 07:19 AM.
Reason: edited to fix typo's
Great post. Always like to see things measured out by some type of standard. A Dyno sure does present a standard, before, and after picture.
I realize dyno runs generally are not free, but is there any likelyhood you could run another after a few thousand miles? I would be interested to see what the perfromance numbers are after the "Adaptive Memory" of the Tondra ECU has had a chance to adjust to the modifications.
Once again, thanks for posting your work. It adds a lot of value to this forum.
Frank
The Dyno usually costs $160.00/HR or $85.00 for three consecutive pulls and the owner did cut me a break, but it still adds up over time. So to answer your question I will be doing another series of pulls once I can find some kind of tuning equipment either programmer, software or adjustable mass air sensor which ever comes first.
__________________ 07 Black Crewmax 5.7 4X4 FE, BU, CK, DZ, AA, HM, MG, CF, SIRIUS, K&N CAI, SMITTYBILT SIDE STEPS, SMITTYBILT BULL BAR, TRUXXX 3" FRONT 1" REAR LEVELING KIT, BFG 305*65*18's, JBA DUALS, CHROME HANDLES...BLAH..BLAH..BLAH....
Re: MODS+DYNO Results
07 Salsa Red Pearl 5.7 DC..TRD, Leather, JBL radio.
Linear Mode
