Here is my first dyno run since installing a powerdyne supercharger, 42# injectors, 90mm MAF, and larger fuel pump on my 2001 F-150 Supercrew with 5.4. I have a custom base tuned xcal2 and did 3 pulls on program 2 which is a street performance tune. I had the check engine light on at the time, with two rich codes p0175/0172. I reflashed the computer by disconnecting the battery before the run, but the codes didn't clear. I'll be making another trip soon to do the datalogging, which I forgot to do the first time. I did 2 second gear pulls, and one 3rd gear pull (red line).

 

I'm not trying to bust your b*lls but are those numbers low for a supercharger?

 

Yea, I thought it was kinda low too. Stock rated hp at the engine is 260, so I'm right about there at the wheels. Mike could probably pull more out once the tune gets right, as it is running way to rich, off the graph. Should be around 11-12:1 I'm told. The powerdyne only puts out about 5-6psi of boost and you got to get the rpms up there before you start seeing any boost at all, since its a centrifical. I'm highly considering a smaller pulley to increase the boost, so I have more in the lower rpms.

 

What's being ignored are the *actual*problems - the first of which is that we have no data that has been provided to us, and the tune obvious needs tweaking of the A/F's.

The second of which is that Powerdyne is by far the least powerful blower you can possibly get - no blower makes less power gain than a Powerdyne. You don't turn up the boost to get more power, you et the tuning right and install an intercooler. Trying to crank up boost to try and make a centrifugal blower act like a positive displacement blower does not work, and you can easily end up with 200 degree+ IAT's, which the connecting rods really don't like.

So the first thing to do is to get all of the datalogging done and the info into us so that the tuning can be completed properly, and then if more power is desired after that, do it in other ways besides just cranking up the boost - like by fully optimizing the exhaust, porting the heads, etc - stock hypereutectic pistons tend to turn to glass under more than about 8 PSI or so, to say nothing of their lack of thickness from the crown of the dome to the top ring land.

So making more power with the blower is first a matter of dialing in the A/F's, and then adding an intercooler - the only reason to raise boost is to simply get the same level of boost AFTER the intercooler goes on as you got BEFORE the intercooler went on, as any intercooler will present some restriction to flow, so you compensate for that by spinning the blower a *little* bit faster, just enough to get back up to the same boost levels.

After that, the way you add more power is be doing more modifications, not be continually cranking up the boost - at least, if you want the engine to live on it's stock pistons.

 

As usual, Mikes spot on. That combo is almost identical to mine. Before Mikes tuning, I pulled 225 Peak HP and 312 Peak TQ. Since then, I have added the intercooler and mikes tuning. The differences are instantaneously (spelling, I know) felt. Granted, I know my next dyno pull will be off a bit, I am on the rich side right now to till I get the data logging done. (geez, at $3.15 a gallon I might not be able to afford the dyno run )

I personally run the 2.75" pulley with the intercooler and see about 6psi at the top end. I do have a big wide open exhaust though, I didn't see mention of one in your post. The one thing you have on me though is the PI heads. Being 98 I am running nonPI heads. Although, thoughts of a lighting motor have been swirling around in that empty space above my shoulders

 

I would like to get an intercooler, my problem is that powerdyne dosent make one that works with their kit . It would have to be custom, which probably means lots of $$$$. Does anyone have one already set up to work with the powerdyne they want to sell? As for the datalogging, I'll get it done and sent to you Mike as soon as I get my LC-1 and get everything hooked up. Thanks.

 

How much more hp will I gain when the tune gets adjusted? Am I loosing a lot with it running so rich, or not that much? Thanks.

 

mustang - I am running an air/air intercooler which I put together myself..see gallery. WLF and chucks_bp are running Vortech air/water intercooler. 98Navi is running an air/water cooler he put together too.
Most of thes part are new or used from ebay, Madferraristi(sp).
If I was starting over, I would do water/air.

 

If I were you, I'd go air to water. It was relatively easy to build, the only slow thing was waiting for the right intercooler to come accross ebay for the right price. I ended up buying a custom unit that someone had built for a thunderchicken. I wanted to do like Chucksbp, but those vortech units were selling for $700 and up depending on what was included. I built mine for less than $500 altogether.

Mind you the piping is changed now, but this is how It looks in general. The new pipes are all 3 inch mandrel bent polished aluminum. I built it with whatever I had laying around from other projects until finished, then when I figured I had it right I got the appropriate piping to finish it off.

 

Thanks for the info guys, but it looks like the intercooler will have to wait a bit. Need to accumulate some more funding, lol. I guess this 9lb pulley is going to have to wait. .

 

Mike, just got home from the dyno and sent all the information by email to Crystal and told her to foward it to you. I am really confused now. Now I'm running too lean. I haven't changed anything. All I've done was drive to truck to and from work everyday. I had to stop after the second pull because it was getting dangerously lean and I did not want to risk hurting anything. I did two second gear pulls, both on the street tune. I did however add 4% fuel at WOT in the xcal2s custom options before the second pull. It still ran lean in the top end however. Here is todays two runs:

 

That is rather lean. What kind of exhaust do you have by chance?

 

I have a flowmaster 50 series cat back single inlet dual outlet.

 

Well, to add to my confusion, the service engine soon light just came back on and I got the codes p0172/p0175 again which are bank 1 and 2 rich. The graph however shows I am running lean. I am just going to take it easy on the truck for a little while till Mike can get things straightened out.

 

Good move on taking it easy. You can run rich at idle and around town and still be lean at wot... Its almost like they didnt put the right FI size in the program or the MAF transfer function is off....

I thought on your original charts that it went WAY rich and then went WAY lean on the big end. The lines didnt show up very well in between.

Is it really 96 deg in Ft. Lauderdale right now? WHEW it's hot down there!

Good luck, i know Mike can get you straightened out..