D, I live in the Encinitas area and I have a 2001 Harley Davidson Supercrew that has been supercharged with many other mods. (1) I would recommend Mike Troyer and Proformance Products for I have bought many mods from them and Mike will not do you wrong. Mike know's his stuff with respect tech items and our trucks. (2) I have the dual program Superchip (flipchip) and had a single program superchip in the past and let me tell you that the flipchip rocks and is the only way to go. (3) With respect to dynoing your truck, there is a place in Escondido that has a chassis dyno that does good work and is priced well. I will get the info if you want. If you want to know more about what I have done and how as well as what Mike has done for me in the past, drop me an email at jplasse@flash.net any time.

Hope this helps in some way,

Bones.

Mods

Flowmaster exhaust
supercharger
superchip
elec. fan
beltech kit
airforce 1 intake
autometer A piller kit
and on and on and on

 

So what does a dyno run cost these days? I really have no clue. I would guess somewhere between $2 and $9,842. As you can see I really don't know.

So if ya know the price and the name of the place that would be awesome. If it's somewhat expensive then I may drop some bones for one of those v-tech pros or something similar.

 

dcovell,

This was the 5.4. They did a total of 4 runs, they thought the numbers were surprisingly low. All told, it took just over 2 hours, they rechecked everything after the first two runs, and ran two more.

I would agree, it's a bit lower than I was hoping to see-- I may yank off the exhaust, pull the chip, run a few hundred more miles and do it again. I'm assuming that I should get a measurable increase from the air filter, chip, and exhaust at the wheel-- maybe it's only 5 hp, but it should be something.

So I'm faced with a few possibile explanations:

1. My truck is making nowhere near 260hp/350ft-lbs stock

2. They made a mistake in the process-- or the machine was out of spec.

3. Driveline losses are very large for these vehicles, and the at the wheel gains of what I did amounts to a hill of beans (sure sounds mean though!)

I don't know if I want to pull the exhaust, I'd pull the chip and filter though-- maybe I'm afraid of what they'll find. I do think that I'm going to pull the chip and double check every contact to make sure it's cleaned properly. My old truck would chirp the rear tires from a stop after the chip. It would not without the chip. That was a 4.6 in a 2000 Scab XLT 4x4. The Screw is a 5.4 XLT 4x4, but does have limited slip.

I don't think #2 is very likely, they do seem to know what they're doing, and have a stable of race cars in there for work-- mostly road racing cars-- Porsche's, Camaro's, Mustang's, etc. Not that it means anything, but they've been in business fo 13 years, just moved into a beautiful new facility last year-- dyno is about a year old also.

Cost was $130

Happy Thanksgiving!

 

Ok. Re-weighed truck, 5620lbs w/me and a full tank with 50 miles. Today the weather is the same mostly sunny 50 degrees as yesterday. I returned to my test road-- a desolate stretch a few hundred yards long for some G-Tech readings.

I made 8 passes, 4 each way. One thing to remember with a G-Tech is that surface incline will skew the results-- so to offset this distortion I make runs in pairs, covering the same stretch in both directions. Then average the two. Also in selecting the stretch, set the G-Tech up on a known level surface. Slowly drive over the prospective surface and watch the device. It shouldn't vary much off of -0- for long. I typically bouince between -.02 and .02, so I know the road is pretty flat.

Here were the runs:

Run1 Run2 Run3 Run4
EB 198 194 176 229
WB 206 184 186 185

For grins, run #4 was done with a slight power stand to 1k rpm, then release the brake. Throwing out the high and the low, as well as run #4 averages 190.5hp. BTW, 0-60 (1 run) 9.28, so since you know the weight and time, you can calculate the acceleration and convert it to HP. The 0-60 was also a 1k powerstand, and I'm sure this can be improved a bit.

Greg O.

 

Hi Greg,

Those dyno numbers are incredibly low, even for a bone-stock 5.4, so unless you were up at a very high altitude, something is definitely wrong somewhere with those numbers. I suppose it's *possible* to be done on power stock by a bit, but you'd have to be down 25-30 hp at the rear wheels in bone-stock trim for those numbers to be right. Given the modifications you've done, you'd have to be down much farther in your stock power, and you're not that down on power. Something is wrong somewhere, in some way, with those numbers. We can see this kind of effect on some dynos that do not have the ability to compensate load for the vastly increased wierhgt of these trucks over your typical 3400-3600 lb. Mustangs, Camaro's, etc., but even so, that's a *big* discrepancy.

The driveline losses are very well known on an accurate eddy-current chassis dyno, at about 65 hp for the 5.4 w/4R70W and 69-70 hp with the 4R100 automatic. Yes, there can be some variance, but not anywhere near *that* much. At sea level altitude, a bone-stock 260 hp version opf the 5.4 that is actually making it's 260 hp SAE Net stock rating should show about 195 hp at the rear wheels with the 4R70W, and about 190 hp at the wheels with the 4R100, give or take a few percent, assuming we're not doing dyno pulls in 95 degree weather.

There can be any number of reasons for those very low power readings, but given the acceleration times you're getting on that SVB2-code truck, I'd say it's a safe bet you're getting good performance & power gains from your modifications, as that is a very heavy truck.

We're out of town for the Thanksgiving holiday weekend, headeding to Charlotte Motor Speedway, but if you'd like to give me a call next week, I'd be happy to go over this with you. You're making more power than those dyno numbers are showing.

 

All,

Thanks for the comments and support. Here's the graphs:



Greg O.

 

Take everything you do with a GTech with a grain of salt. I've seen them cut up to 2 seconds off of 1/4 miles, add 50HP and so on. In terms of a interim testing tool they are ok - but I wouldn't advertise any numbers I pulled from a GTECH.

 

That dyno sounds wrong to me or there is a mechanical problem somewhere. Maybe they put the tire size in wrong or some other info was put in wrong. Also the dyno may not be suited for your heavy truck.

I may get my truck dynoed here real soon. I think there is a place that will do it for $50 here somewhere.

 

Posts that is!!

So I had some problems in January with my ABS and Idle Air Control valve. Pulled the chip, took to the dealer. Chip is still out and I really can feel the "fog" in the shift response.

Also, the transmission "thunk" is not nearly as prevalent. In fact, it's almost non-existant.

I have a dyno appt Monday 1/21 at the same place. Let's see what my truck does this time w/o the chip. I'll post the dyno chart Monday night.

Greg O.

 

Cool, I knew that those other results didn't sound right!

Can't wait to see the results.

 

Well, better. I'll try to get them scanned soon, my router is flaking out, bear with me. Anyways, here's the summary, after 8 runs. Although in my previous post I mentioned maybe the shop was having troubles, or no gains a from my mods, but I really think that #1-- not making the power of 260hp/350ft-lbs is the most likely. I did my runs at about 1600 miles, installed the Superchip and exhaust at about 900 miles. I had the opportunity to remove the chip (bad ABS and IAC valves) before taking the truck in for service in early January, and it's been out since. At 4500 miles I got:

186.6 HP and 240.7 ft-lbs Torque

Using a figure of 65.3 HP for driveline loss (not sure how they arrived at that exact number), they estimate 251.9 at the flywheel. Again, I've got 4500 miles, and they asked what I did.

When I told them, yup-- pulled the chip, I got a puzzled look (priceless). As we chatted though, my first run probably was too early, the motor simply wasn't broken in enough. The chip is going back in this weekend, and I'll see if I can post the chart also. I could overlay the graphs........ uhhhhhh, nevermind.

The third dyno run may come around June (we're doing a RX-7 club dyno day), I think I can buy a slot for my truck too (I'm organizing it). If I can get close to the claimed gains from the Superchip, it *might* dyno more HP than my RX-7. Certainly torque! Anyway, it might surprise a few in the club in the process.

So, this is better! Yes??

 

alright my trucks a 98 Ex-Cab 4X4OffRoad is the hp235 and 335 lbs on the 98??? thats what i thought is this true??

 

Dang it's going to be hard to wait! This is tougher than waitin' for Christmas.

 

Well it's 260 horspower stock at the flywheel according to Ford right??? so those calculations with the dyno sound right, assuming you don't have any mods on that truck...

One of these days I will get a dyno run on my truck too.

 

Just the Borla cat-back and a K&N filter in the stock can at the moment. Chip going back in today.....