loaded the tune from my tuner, and the truck runs. idle is high...around 2800, but we are fixing that. fyi, for those considering this on 03+ models, there are lots of differences than on the 97-02 models. will take pics soon. only driven it to thew gas station and back to work, so no real results yet. i have an appt to be dyno-tuned monday at 1:30. you can view the session live here: http://www.performance-dyno.com

 

So what kind of supercharger did you swap?
oh I see it in your sig now. Hows it running?
Phil

 

running better now. the high idle was due to a broken canister vent valve. we put a similar one in for now so it could be driven. i havent opened it up yet, per instructions from my tuner. he said wait until he dyno-tunes it monday. the truck seems thirsty(even with babying the gas)....but im sure that will be somewhat corrected on the dyno. will post result for those who dont watch live.

 

end results: more power, better mpg(as high as 20.4 before traffic), and a lot bigger smile! tuner said i could see about 75 more hp with an open intake and dual exhaust, but i am quite satisfied with the truck the way it is.

 

Hey Congrats

Those are flywheel numbers right? What loss factor did you use? What are the max on each. Looks about 450 torque and 340 hp which is right about what the HD puts out. Did you use the same pulleys as the HD? Why 15:1 air/fuel until 3000 rpm? I'm guessing it doesn't build boost until then but is it normally that lean stock?

Did you end up making a document with all the parts and modifications you had to make? Pictures during the process? Anything more I can get from you would be great as I'll be doing this project too and it is the exact same vehicle. Thanks!

What did the whole project end up costing you?

 

those are the rear wheel numbers, not the crank.

 

I see that now that you added it to your sig with numbers. That looks great then. Do you know what stock rwhp and torque would be? At the flywheel it is 260hp and 350lb-ft so I'd assume about 22% loss or so. Just curious if you dyno'd beforehand or have seen anyone who did because we know it can be far from published numbers. I think the harley davidson f150 was only published to have 340hp at the flywheel and that has to be underrated with the numbers you are showing.

 

He has a 6# lower pulley so hes going to make way more power then a stock Harley!

 

stock should be about 185hp at the wheels according to my tuner. i added a 6lb lower pulley, aftermarket exhaust and a panel filter, which is why my numbers are higher than a stock harley. stock harleys are 340 at the crank, and the lightnings 380(based on '03 MY)

 

Forgive my ignorance. I still have a lot to learn with all this. Basic questions... So this 6# pulley is the pulley on the crank right? Does that mean 6 lbs? What is the stock one? Is it a weight difference from the damper and/or a size difference? Size difference would change the psi of boost right? What psi are your running?

 

Where did you find the supercharger (and all of the parts) and how much. Those are some impressive #s.

 

you should come to the meet this sunday in nh. you can see it in person. i bought the s/c setup from ebay($1,550 shipped), and the rest of the stuff from mad enterprises(about $2,200, but some parts being returned). i am happy with the outcome!

 

i believe the 6lb pulley means that it adds 6lbs of additional boost due to the size(not sure if bigger or smaller!). it does bolt to your crank pulley. there is a 4, 6, and 8 lb option....i went mid, which should be 12 lbs boost total.

 

A smaller supercharger pulley = more boost
A larger supercharger pulley = less boost

A smaller crank pulley = less boost
A larger crank pulley = more boost

 

That explains the numbers then...it is a bigger pulley. 12lb boost is the highest I've heard of on this type of swap. They say it is all about a good tune though...

Does anyone know what our 4r70w is rated for? If memory serves it was something like 506ft-lbs torque. I assume that would be a crank number in which case you are a bit over. Doing anything to your tranny? Factory Tech has a separator plate for us now for only $85 in the place of the former 3 times as much valve body. I'll probably go with that and I'll be running 8psi from a stock lighnting setup.