Ok, this is not the typical"what should I get thread", I instead want to hear opinions on two particular options. The ATI procharger vs a non-traditional (sts type, remote mount) turbo system. Which will get into boost sooner, which do you think would be faster at the track, etc?

Each has its ups and downs, ATI needs a belt and has higher paracitic loss, but the sts-type has the oil system issues.

When it is all said and done I believe that they both will make big power but just wanted to hear opinions.

I will preface this with asking to not have "get a roots type" and other comments as they do not address the subject at hand. Also the sts has been proven by the chevy guys to make big power so the merit of the sytem is not in question.

Time to put in your $.02

 

i would go with the turbo. turbos make bigger power anyways, and i can tell you from personal experience, there is boost lag with a procharger. some people will try and say the boost lag is a negative side effect of the turbo, but with correct sizing and torque converter matching you can eliminate boost lag completely. and as soon as this point is reached, with the turbo you will achieve full boost, whereas with the ATI you only reach full boost at the shifting point......

i would never get another ATI when i could get a turbo instead.

 

So even the rear mount turbo you feel (if properly sized) would out perform the ati? This is sort of my though. I am only looking to go to about 380-400rwhp (which is what I am comfortable with on the stock internals, Mark got there with only 8psi on thier system so it should be pretty easy.

 

Turbo!!!

 

What if you installed two (2) small turbos underneath? Wouldn't you get very fast spool up and have the power?

 

Problem with two is all the extra piping, the space is already limited, not under the cab but the room to run the piping to the intake, plus then I would think you would have to have two waste gates which adds to the cost. Although two little ones would be hella cool to have, one on each side.

Any recomendations on turbo size, A/R etc.?

 

Twins

 

When I had the remote mount turbo on my truck, I used the same turbo that I am using now. Master Power T-61, .84 A/R exhuast housing, .70 A/R compressor. It has a 4 inch compressor inlet, and a 2.5 inch compressor outlet, and 3 inch exhaust outlet.

I had the turbo mounted right behind the factory Y pipe, in fact I took apart the factory connection at the Y pipe and welded my turbo flange to that and bolted it back onto the Y using the factory connection.

I never had a dyno done with this setup, but I think the turbo size was perfect. At 70 MPH, turning about 1700 RPMs, I could make 3 psi of boost in overdrive. No more downshifting when going up hills!!!!! The only problem that I had was not making much boost in first gear. I could still hit 6 psi in first, but it wasn't untill about 4000 rpms or so. But in 2nd and 3rd and 4th gear, I could hit 6 psi somewhere around 2500 rmps.


Marlon

 

Marlon, yours is a v6, correct? So if it spooled pretty good on the v6 then it would be almost instant on my 5.4 v8? Would it make sense to go up just a tad on the exhaust a/r so not to choke up at the higher revs. Ideally I would want it to start to spool pretty low and hit at least 6 psi at 3000 rpm. But I also want it to pull cleanly through the rpm band, is that asking too much?

I plan on mounting it just were you did, but will fab up a new "Y" pipe since my aftermarket exhaust be-rid me of the stock unit (plus the stocker looked very restrictive).

PS, Marlon I got to see your truck sometime.

 

Turbo for sure.

 

I don't have a V6, those are for sissies, lol. I have a 4.6 with an auto. I wish I could be a real man with a 5.4 though

I can tell you though that I like my truck a LOT better now that I have built my own manifolds. The amount of pipe between the manifolds and turbo is very little now, and I get almost instant spool up with that turbo now. In fact, I think its TOO small now. I mean I can powerbrake 6 PSI plus of boost now. Its like a roots blower or something now, at 1500 rpms going down the highway I lay on the gas just a little and make boost, pretty sweet.


Marlon

 

On offesnse intended.

I did not realize that yours had the 4.6, so then I guess the turbo you ran would be perfect for what I want.

I would love to be able to build a manifold and put it up under the hood, but it is my daily driver so I can not have allot of down time. Plus I have to stay as emissions legal as possible because Dallas county is under "Smog ****" rules.

I may be able to fab it up in such a way that for somg I can strap on the cats and then insert straight pipes to run the rest of the year, which should improve the spool of the turbo.

Funds will be limited for this project so have to get is all planned out before diving in. Thanks for all the info Marlon.

 

This sounds like the way I would like to go with my project. I don't care about top end. I want to be able to run 70mph towing my trailer in OD without having it downshift everytime I hit a small hill or hit a headwind. I would like to have boost in the 1500-3500rpm range. I very rarely turn my 4.6 over 4000.

Don't mean to hijack the thread but since it is Turbo or Super can I ask does anyone know if a SC or TC would be best for fuel economy for this application?

Thanks

 

The Turbo will give the best MPG as well since when cruising it puts no load on the engine, whereas a supercharger is always putting some load on the engine in order to turn the pulleys and the blower. If you can build a system the turbo is hands down the best route, IMHO.

 

You should you see no change or an increase in MPH with ALL forced induction systems. In everyday driving I see no loss in mpg with the roots.

A cool project would be an organized group of F150 owners developing a bare bones turbo kit using only standard materials and cheap sources for parts. May not last forever, but how many miles you gonna put on it anyway? Has anyone actually itemized the cost and determined where cost could be cut? Theres gotta be a shop out there that would work with a group to produce a true starter kit.