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Old 10-20-2014, 11:30 AM   #1
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Twin screw or centrifugal blower

5.4l 3v engine, straight pipes, tune, wanting to sc my gt, which is better twin screw or centrifugal blower?

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Old 10-20-2014, 11:32 AM   #2
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Twin screw provides near instant torque. A centri builds up torque and horsepower. 2 totally different systems even though they are both superchargers.
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Old 10-20-2014, 11:36 AM   #3
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I didn't know that, thx for info...ima be road racing, vortex be good or whipple

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---------- Post added at 08:36 AM ---------- Previous post was at 08:36 AM ----------

In your opinion

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Old 10-20-2014, 11:38 AM   #4
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I don't know, I would guess the centri. Both will heat soak, but the centri would probably be easier to use on a road course.
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Old 10-20-2014, 12:04 PM   #5
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Coo thx for advice ima look in to a paxton or vortex

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Old 10-20-2014, 08:20 PM   #6
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Twin screw! Positive displacement! Instant torque. Remember torque wins races!


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Old 10-20-2014, 08:22 PM   #7
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Quote:
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Twin screw! Positive displacement! Instant torque. Remember torque wins races!


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And intense heat soak will slow you down quick.
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Old 10-20-2014, 08:27 PM   #8
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Turbo > all


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Old 10-21-2014, 12:25 AM   #9
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Thx for the info guys...I'm undecided now...twin screw love the whine

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Old 10-21-2014, 12:27 AM   #10
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Soccerluvr4 you say turbo?

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Old 10-21-2014, 07:55 AM   #11
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Twin screw or centrifugal blower

Twin screw makes power at lower rpms

Centri makes power at higher rpms

Turbo makes it everywhere.

There are several cons to a turbo though, most notably cost, install difficulty, and turbo lag; make sure you do your research on turbos.


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Old 10-21-2014, 01:22 PM   #12
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Will do.....thx I heard dual ball bearing turbos spools up faster than single one, giving instant boost not sure how true it is

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Old 10-21-2014, 01:53 PM   #13
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A triple ball bearing, oilless turbo will spool so much faster than a centrifugal, and make much more power. And doesn't heat soak like a twin screw.

Cons are in the complexity, but the right turbo set up is greater than anything else.


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Old 10-21-2014, 01:54 PM   #14
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IMO the only thing a twin screw has for it is the insta-power, but I would personally go with those as a last resort on my car.


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Old 10-21-2014, 02:13 PM   #15
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Tq wins races.
Best options for that is
Turbo or nitrous.

Centri blowers are nice but only step up and shine with alot of boost.

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Old 10-21-2014, 02:39 PM   #16
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OP what do you use the car for? If its lots of drag strip time nitrous is going to be your best option. But if its a daily driver or any other form of driving, a turbo is probably going to be your best option.
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Old 10-21-2014, 03:08 PM   #17
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Thx, turbo sounds like the best bet, but the car will be used for all around driving, daily driver, drag strip and time attack

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Old 10-21-2014, 03:19 PM   #18
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IMO the only thing a twin screw has for it is the insta-power, but I would personally go with those as a last resort on my car.


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What setup are you running now?


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Old 10-21-2014, 03:36 PM   #19
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Twin screw or centrifugal blower

If I was going forced induction turbo would be the route I would take. I'd have It professionally installed though. Exhaust, gears, and cold air intakes is where I draw the line!

Turbos are just a superior means to making boost and should be used whenever it's financially viable.

I used to have a late model Impreza. It took awhile to spool up but It sounds like that is no longer an issue. Maybe I should look into a turbo too?

EDIT: upon further review, I just want a coyote lol.

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Old 10-21-2014, 03:55 PM   #20
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Just a quick question. It is my understanding (and I may be wrong) that the Cobra Jet intake is better at lower RPM and the Boss better at higher. Based on this assumption is it better to get a Cobra jet with Centrifugal charge or turbo? I am still debating the two and haven't ruled out a twin screw for that matter. Obviously the intake is mute point on the twin screw.

Like some feedback even though I am probably a ways off from any of the above.
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Old 10-21-2014, 04:08 PM   #21
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Just a quick question. It is my understanding (and I may be wrong) that the Cobra Jet intake is better at lower RPM and the Boss better at higher. Based on this assumption is it better to get a Cobra jet with Centrifugal charge or turbo? I am still debating the two and haven't ruled out a twin screw for that matter. Obviously the intake is mute point on the twin screw.

Like some feedback even though I am probably a ways off from any of the above.
The CJ manifold is better all around, it loses less torque than the Boss at low RPM, and it holds its power band longer, and has a higher peak.
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Old 10-21-2014, 04:30 PM   #22
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Silvr002001, if the question pertains to me, my setup is 5.4l 3v, muffler delete, tune, 3.73s

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Old 10-21-2014, 04:39 PM   #23
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Real world testing between 3 cars same dyno shows a gain of 11-13 real hp with the CJ over the boss.

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Old 10-21-2014, 04:50 PM   #24
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Twin screw or centrifugal blower

I have the roush twin vortices or TVS supercharger. The instant power is fantastic. Drives like stock unless you go over half throttle. After that it is really like having a different car from pre supercharged form. The "I don't want boost when I'm driving around town or before 2500 RPM" argument for the centri is really a non factor because the blower is in bypass mode unless you want it to come on. Then just stick your foot in it and your at full boost. However I see you have 3:73's and the added TQ from displacement. I could see where a centri would be beneficial from that aspect. 1st gear for me with the stock 355 is every tricky. You can finesse your way to WOT. You really just can't floor it unless you want a smoke show. I also have crappy sumitomo htrz 2's right now. A set of drag radials may remedy that a bit.


Really your going to get a bunch of different answers and I've see the argument a few times for both sides. Usually centri guys give all the reasons to go centri and vice versa for positive displacement. At the end of the day your going to be grinning from ear to ear either way you go. Centri will be a bit smoother and better for traction. Twin screw will be more violent, instant and give a little less peak HP but better TQ.


Edit to include a link to a procharger vs kenne bell article

http://www.mustangandfords.com/event...t/viewall.html

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Old 10-21-2014, 05:36 PM   #25
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Twin screws look the best to me... I almost decided to do a Kenne Bell s/c on my car.
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Old 10-21-2014, 05:49 PM   #26
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Here is what i'd recommend to OP. Since he says he has a 5.4 3v that means you have a much longer stroke than the 4.6, which means more torque and relative horsepower. In your case i think dropping down to a set of 3.31 or even 3.27 gears and then adding in a Turbo would be the best option. It'll give you longer gears for you to hold onto while the turbo builds boost, really no need for anything higher than that with the super long stroke you already have. And on top of that what would be awesome would be to do a big bore on the motor. There are sleeves you can get that bore it out to a 3.7" bore, in your case that will make the motor a 5.8L (same bore and stroke as the GT500, but you will have a 3v instead of 4v).
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Old 10-21-2014, 05:54 PM   #27
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And he will be 14k lighter in the pockets after that build. Lol. Spending other people's money in fantasy land is awesome!


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Old 10-21-2014, 06:04 PM   #28
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And he will be 14k lighter in the pockets after that build. Lol. Spending other people's money in fantasy land is awesome!


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I've spent at least 5 million in fantasy car land.
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Old 10-21-2014, 06:07 PM   #29
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I've spent at least 5 million in fantasy car land.

Hahaha!


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Old 10-21-2014, 06:21 PM   #30
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I think I've rebuilt my car 6 or 7 times there. Never works though. Still the same car when I get out to the garage. Dammit


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Old 10-21-2014, 06:23 PM   #31
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And he will be 14k lighter in the pockets after that build. Lol. Spending other people's money in fantasy land is awesome!


Tvs 2300/ 452rwhp 416rwtq

Hey it's what I plan for lol. Turn the 4.6 into a 5.3 big bore stroker that revs to the moon.


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Old 10-21-2014, 06:24 PM   #32
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9000 redline :thumbup:

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Old 10-21-2014, 06:29 PM   #33
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9000 redline :thumbup:

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Probably doable with a big bore to unshroud the valves, but maybe not with a stroker kit. Will need some bomb *** heads for that.


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Old 10-21-2014, 06:31 PM   #34
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Just buy a nascar engine.


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Old 10-21-2014, 06:48 PM   #35
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Main thing would be finding a pcm that would support it. The stock one would never work,
You would have to go with the holly dominator or equivalent.

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