so are we talking Roush roots and Whipple Twin Screw? If so then yeah the TS wins all day but if we are just talking roots then it's debatable. My Cobra has a centri and I'm not finding it as fun but with the power I'm making it helps avoid wheel spin so if you plan to go big on your F150 and put in track time take a look at a centri system.

 

I already had a centri system on it. Did 450/450 on 12lbs with a very conservative tune

It was QUICK on the street. Like you said it helps manage the tire spin. It just hooked and booked.

 

First off thanks for surving our country! Because of people like you we can have these debates of which supercharger is best

My best time is a 14.5 with a 2.3 60foot, yours is 14.2 with another half pound of boost with a 2.1 60 foot. If I pulled a 2.1 60 foot I would have made a 14.1 pass so in that with less power I would have been faster but really we can play this game all night.

Its real hard to compare times unless the trucks are side by side cause altitude, weather, humidity, track prep and all that play a roll. Thing about Twinscrew is as the night went on my passes got quicker as the blower never got heat soaked even though average wait time on that night was probably 5-10 minutes. My Cobalt SS with a Roots blower (stock) would get heat soaked so bad it was easily noticeable after just a few miles of driving.

BTW I like your truck! Did you make that 14.2 with the headers and efans and all that? if not have you ran since to see what it took off your time? My trucks just stock except whipple with whipple tune (horrible) and xpipe true dual exhaust.

 

yeah, humidity and all the factors are huge. Yeah the Roush got heat soaked on the way there, lol. I had to drive almost 2hrs to get to the track and then that was my first 10min after I got there which happened to be my best. After that there was a .200 difference in the other 4-5 runs after that. I called Troyer back cause I was told this was a 13 second setup and Neil said yeah it is if you didn't drive 2hrs to get there, lol. He also said to ice it down and do some kind of craziness with the e-fans, lol. I figure if I can't hit 13's then I've got more work to do, granted I drove a long time but if I can hit 13's after driving 2hrs I'll be better off than most. Either way, around here in the local area I consider it a 13 second truck. Yeah we bought the truck brand new and installed everything at 6K miles all at once when I got back from the desert so that's everyhthing on my mod list putting down a 14.2 with mild heat soak.

 

instead of starting a new thread, i'll just interrupt for a min.. how much is the life of the engine reduced by getting the whipple and running 12psi? (also can 12psi run on stock internals? I only have exhaust and would like the whipple, but don't wanna get into the motor). It's my Daily Driver but I'd like to have some fun with it.. oh 2009 2wd 5.4 3v platinum (yes i know warranty = VOID).. got 12k miles atm..

I know boosting isnt bad as long as you dont overdo it. I'd like to know what bolt-ons along with the whipple will let the engine live long and strong..

 

12psi isn't a good idea on a stock motor but I would worry about the trans before the motor. Not sure on any 09 kits but Roush has a 3yr/36K warranty and so do Magnachargers, of course you have to take them to a authorized Roush dealer for warranty work but you can look that up at the Roush site. 12psi will be a violation of said warranty and putting the stock pulley back on would make your 12psi tune run like **** so it would be pretty obvious IMO. I'm waiting until my warranty is up then I might have a go at some more boost, 10psi should be good according to Troyer. Since a SC uses air to create power is almost necessary to do a complete exhuast setup from the manifold back i.e., headers, cats, cat back. Why have a SC then you exhaust be the chock point.

 

what is the highest psi a stock engine and tranny can handle? Id like to stay BELOW it, but would like to know. Also, what psi on a stock setup will run 450/450 ish (i saw the vortec for sale from the other member, but didnt get a response yet). Also, the roush f150 and saleen f150 both have a kit that are about 15k after all of the other parts, what entails in this kit to make it so much and what is actually necessary to run the boost?

 

not sure about the highest boost levels, would have to ask Troyer or someone like that. Originally Troyer was only comfortable running 8.5psi on the Roush blowers which is conservative. He now has pre-ported Roush blowers and runs 10psi I believe so i guess he thinks they can handle it. Take everything I have and running 8.5psi and that's about as far as you can go with the stock fuel pumps. Maybe 400rwhp would be maxing them out.

I think you should look into how SC work a little more to get familiar with it, superchargersonline has great articles. PSI/Boost, whatever you call it is just a restriction measured at the intake manifold. The more air flow you have the less boost/psi you need since you have a more efficient vehicle. So it is possible for someone to run more psi than my 8.5 and make the same or less, just depends on mods. Also, centrifugal blowers are different than roots/twin-screw. Centri blowers rely on RPM and make max hp/tq at higher rpms as where the roots/twin-screw make immediate power once you hit the gas. Not sure what kits you're looking at but the Roush blower w/intercooler is around $6500 I think then whatever you installer would charge for a days worth of labor. Intercoolers are typically the price booster in the kits, you can find non-intercooled kits for cheap but you'll make less power and in the end you will need one anyway.

 

so 8-10psi on stock motor + upgraded fuel pump should be fine with the engine and push 430-450whp no problem? i believe theres a roush dealer near me, i'll call them today. thanks

 

not sure if you will get 430-450rwhp, actually I can probably guarantee you won't. I have all bolt-ons but no built motor, upgraded trans and fuel system and I only make 380rwhp/419rwtq. I doubt you have what I do and if I went up to 10psi I would be glad if I saw 400rwhp. In the end I don't care what you have if you don't have a great tune...not decent, GREAT! Sure you could have someone get you to 430rwhp but how long with your motor last. Good luck.

 

my goal is to be equivalent to the saleen f150 or the roush f150. (dont say i shoulda bought one...). I didnt buy one because i like the Platinum MUCH more. The harley truck is nice though, still not my style.

 

No, I totally agree with you on that. Saleen and Roush just aren't my type of bag and if the Harley had anymore **** on it I would puke. Besides all those vehicles aren't trucks, their just bloated street wannabes. Only real street truck was the GenII Lightning and it could still tow.

Either way, you figure a stock 05-08 5.4l makes 202rwhp and if you add everything I did it will get you to the 380rwhp with a great tune. Anything you do after that is up to you.

 

10PSI is max you really want to do, a few people including FATHERFORD who had that vortech kit (12psi) for sale run 12psi on their daily drivers. 450/450 is about where you really want to be with a amazing tune. Personally I want to hit 450/450 with 10PSI and supporting mods like long tube headers and such. Anything over that and you are really pushing your luck.

 

Are you sure only 202? that's like a 33% loss of hp from the crank to the wheels...that kinda sucks doesn't it? lol
I remember them dynoing a stock mustang (totally different story I know) on one of the powerblock shows and it put down around 260-270 (268 I believe) to the wheels. They're also rated at 300 hp from the factory.

 

I thought it was more like 230RWHP stock not 202.