HI!... If the builder knows what he's doing you can;t beat a turbo. Turbo lag today is non existant if set-up properly. The turbo cars around here destroy the twin screw/cent cars. One of my buddies has a 91 EAGLE TALON that he built himself with a t-60 and runs high 10's all day on only 20PSI. It's only a 2.0L 4 banger. He makes boost off idle and pulls all the way to 8500RPM. A properly designed large turbo set-up on a 5.4 can make well over 650RWH.P with just 14-18 psi.

 

could a stock 5.4 handle that much boost and RWHP?

 

HI!... No, the stock rods would let go around 450RWH.P. The 5.4 block though can handle over 1000H.P if blueprinted and using ARP studs/fasteners.

 

thats insane. i would love to see one of our trucks putting down those kind of numbers.

 

Here's one my builder built!

http://www.performance-evolution.com...461/933927.htm

Phil

 

Hey Phil, I see he has a 6.0 liter block. I always wondered why guys like yourself who have had their engines built, why didn't you increase displacement? Is is sustantially more cost?

 

Yes it is.
I paid $4800 for my block and it's rated for 750 HP. He paid almost $10K for his and it's rated for 1000 or 1200 HP
Mine is .020 over and the aluminum block can be bord out further/it's bigger or something.
At least that's the way I understand it...lol

Phil

 

HI!... PILOT over at GOT PRESSURE has a built 5.4 with a custom T-88 turbo on it which makes 886RWH.P/948FT/LBS of TQ at only 18psi.

 

turbo is gonna have to build up boost regardless of who built it! you can however build up your boost before you get to the line, so there is no waiting for it. if your vehicle is for the street go s/c, if for the track do a turbo.

 

kenne bell

 

HI!... You didn't get it. I meant who was building/fabricating the turbo kit and the components used. Not the company that make the turbo.

My set-up will be running a t-88 and will be in full boost around 3000RPM. I have a 3000 Stall converter, so no waiting for boost for my set-up, but traction will most likely be a problem. I'm working on that though.

 

hey, i hate the threads where the guys argue back and forth, so i'm not trying to do that. i know some things but always open to learning more! correct me if i'm wrong but doesn't a twin screw have full boost from the get go. i think you misunderstood me about a turbo, a turbo makes alot of power no doubt.(i would have a turbo on a fox if it was strictly a drag car.) i'm running a kb at high 9's, and turbo cobras around here are running low 11's,(with 6 speeds) but fox bodies with turbos are running low 10's and mid to high 9's.

 

HI!... Yes the positive displacement blowers produce power right off idle. But in my application that would be no good. My truck weighs 3900LBS, has 305/45/R-18 NITTO 555 drag radials, and a 3000 P.I stall converter. I'm still N/A at 354RWH.P/392RWTQ. I now have issues with traction. See my point? For me a turbo is the only way to go. When my truck hits the roads again, it will be 500LBS lighter with 18.50's under the rear with a custom 4-link. What I'm looking for is mid range to top end. Not low end, I have WAY too much as it is with the 4.10's. Now if your going to tow the family trailer or boat and want the occasional S/R or track day then the SC is for you. If your building a true SPORT truck than I would say turbo 90%. JMO.

 

ok so i have a stock 1990 F150 custom reg cab long box, 5.0L 302W. and i'm gona put air ride on it so i can have it higher for winter since i live in Canada and still be able to drop it for crusing. and should i have turbo or SC? i want is sports truck i prob won't be hauling big things maybe i trailer evey now and then but mostly just driving daily. and which ever one turbo or SC which ever would be best do i need to get anything else like pistons or w/e?