Does anyone have rear wheel dyno results after installing an after-market intake and exhaust and tuner?Sure would like to see numbers other than solely from the After-market reps.All ears open,good or bad results..

 

there was a guy that gained somewhere in the neighborhood of 20-30rwhp out of intake, tuner, exhaust. Dont remember who it was though.

 

what would 20-30 be at the fly?

 

rwhp=rear wheel horsepower. When people post gains its always rwhp.

 

Right. That's very true, however, the advertised total hp#'s from the factory are at the fly, correct me if I'm wrong?My point is, when someone says I have 300hp, I assume that's at the fly, less approxiamately 20% parasitic loss thru drivetrain to finally indicate power at the rear wheels?It can get a little foggy thru the translation,ie. how #'s are given to you, if you" know what I mean Vern"

 

I beleive that guy made 225+-rwhp. It was a supercrew fx4 con 5.4.

There is another guy on her claiming with same mods, except true duels instead of single cat back, putting down 255+-rwhp

 

Multiply the RWHP X 1.15 (This will give you the Flywheel HP with a 15% tranny loss adjustment.

Multiply the RWHP X 1.20 (This will give you the Flywheel HP with a 20% tranny loss adjustment.

I don't know if our automatic tranny's have 15% or 20% drive loss from flywheel to rear wheels. Although I think it's closer to 20% for automatic tranny's/

 

I think it might of been 255+- HP , b/c 225 RWHP X 20% = 270 Flywheel HP which does not sound right

255+- HP X 20% = 306 Flywheel which sounds like stock numbers.

 

Either ford is lieing to us about the engine numbers, or the trannys are zapping alot. Because i KNOW that one guy was in the 220rwhp range with 1714, airaid, magnaflow cat back(think that was the cat back anyway) His base run was in the 190rwhp range.


You also have to remember these are with 4x4's so the transfer case drags power too.

 

Through search, what im finding. Im looking for more and that one that was 220rwhp, i know it was on another site...

This test was performed on a Mustang Dyno in 2nd gear.
We did about 5 pulls.


Max HP 265.6 @ 4800 RPM
Max Torque 306.9 @2100 RPM

The stock programming of the computer with the mods on my truck are killing my HP.

The test showed the truck is running rich in the upper RPM'S. The computer is trying to over compansate for the mods made to the truck.

Around 3400 RPM the variable valve timing kicks in and a very sharp decrease in power is noticable on the graphs. The lowest point 40 HP @ 3700 RPM till about 4700 RPM then it's back up again to hit about 265 HP.

The rev limiter also prevented us from getting higher HP numbers.

The solution I see is if you do the Exhaust and/or Intake mods you almost have to chip it as well to get the most benifit of the true potential HP & Torque.

So now I'm looking into the super ship from Toyer or I will wait until Predator comes out with their own version.


Dyno chart for it.... One weird looking dyno chart...



Here is another one I seen, Daneo2's dyno graph (Lariat 4x4 w/3.73 gear ratio)

 

Another one

I went to the dyno (Dynojet) today. I wanted to get baseline runs with the Custom Tuned PCM before I add any mods. Unfortunately, it seems that my PCM still has a speed limiter, which was supposed to be removed as part of the Superchips custom tune. See the top graph in the image below. The HP and torque fall off a cliff at 98 mph.
I was also a little disappointed in the hp and torque numbers, especially torque. The bottom graph shows a dyno run going through 2nd gear. The max. hp is 236.68 and the max. torque is 283.47 ft-lbs. (These are SAE corrected values. The NONE corrected values were 248 hp and 297 tq. The STD corrected values were 244/292.)

Anyhow, I already spoke with Troyer Performance about the speed limiter issue. They contacted SCT and are waiting to hear back why they think the limiter is still on my PCM. I will be shipping my PCM (and a cd with the dyno run files) to SCT tomorrow to (hopefully) get fixed. I should have it back from them on Friday.
Can anyone tell me what Air/Fuel ratios are considered safe and/or optimal?

John


RedR/CFlair posted:

Regular cab short bed , 5.4 3.55 LS. DynoJet 248C 250 peak HP 271 peak torque. Dropped to 247 HP with air filter element removed


Supercrew04 posted:

I ran my truck at the dyno today. Its a 2004 supercrew larait 4x2 5.4 3V bone stock. 3:55 gear every op. minus 4x4-heated seats-reverse sense.


3,122 miles on it. has had an oil change.

237.5 HP

284.4 Torque

I was happy with the results.

Thanks David



neptuno1 posted:

I got 231 hp at the tires when I took mine to the dyno last week.

What kind of dyno did you goto?

Mine was a Dyno Jet and because of the F-150 has a speed limiter and RPM limiter (according to the guy running the dyno) the HP numbers are not accurate since you have to do the pulls in 2nd gear.

When you did the runs was your truck in drive or 2nd gear?

When I did it in drive the truck cuts power to the engine at 4k RPM and when you do it in second it cuts off power at 5k RPM.

The guy at the shop seemed to know what he was talking about and he was pretty sure that if we removed the rev/speed limiter the truck would do around 245HP....


neptuno1 also posted in another thread:

wanted to get a baseline run on my 04 lariat supercrew before installing an exhaust and intake so, being in boston myself I had to drive all the way to Ayer, MA which is about 50 min. each way. 50 min. for someone used to getting from one side of town to the other in about 10 min. is an eternity!

This shop, KTR Performance was hands down the most unbelievable shop I have ever seen in terms of quality of work, cleanliness, and number of cars you have never seen before. They mostly work on vintage cars, but recently started taking in newer models too.

Anyways...They have what looked to me a pretty high-tech dyno. I am used to Dyno Jets which are just 4 drums built into the ground. Here they had a Dyno Dynamics Dyno which is a load bearing dyno and apparently with the way the F-150 computer works it cuts power to the tires at 5,000 RPM when the ABS light is on so we could only get a HP/Torque read upto 5,000 RPM. The whole situation wasn't a total loss since just taking the tour at KTR was cool as heck. But also I found out my truck has about 178 HP to the tires at 5,000 RPM.


Random chart i found

 

so what are these guys saying ? Are they saying that the 1714 tuner is not getting the best hp numbers with other mods?

 

With the 1714 tuner you cant tune the truck for the other mods. Diablo you can, apprently that new troyer one you can also.


The rear wheel dyno numbers are all over the place. from 230rwhp stock to 178rwhp stock...

 

I see. So it is better to wait and get a tuner that can incorporate all the mods.

 

Yes. You dont have to wait though, the Diablo one is out and kicking. I have it and I love it.