Blower Setups Street Friendly?

[Lynx331]

Hey guys... im really stuck in the middle here. Im stuck between a Centri Supercharger and The kenne bell twin screw. Im going to want to keep my lumpy cam which starts making power at 3000. Now going with the centrifugal supercharger... The heads are mid-high rpm heads.. the Intake makes power at 4000 plus. Would this still be a pretty decent street motor? Now on the flip side.. the twin screw... im told creates full boost at 2000 rpm. Ive even heard of people having traction problems because of so much torque down low. I would be using the same mid-high rpm heads and the 3000 rpm cam. With a ported GT 40 lower intake. The only kits i can find a 6 psi kit... 6 psi isnt gona give much... is it? Just for future compatibility... incase i ever had a 500+ hp motor... would it be better to be running the centri or the twin screw? Would the twin screw be a restriction at that kind of power? Also with that kind of power couldnt i see detonation because the kenne bell is not intercooled?

One last question... Ive been considering the fact that some people have traction problems with the twin screw.. and i was thinking with the centri i would have a setup that wouldnt start screaming until about 3500-4000 rpms... the car would already be moving down the road pretty good...so it might not loose traction as easily... so would it actually be better to have the centri setup.. for traction reasons? ( Dunno if there is any truth to me thinking this.. someone please correct me if im wrong )

Thanks Guys!

:SNSign:

 

[IntenseBlue]

Lot's of people that haven't ridden in centrifugal s/c cars misinterpret them. It's not like they're not there until a certain rpm. It's gonna make more power all throughout the rpm range. Just the power increase is going to steadily rise with the rpm level. You're gonna have traction issues whether you go twin screw or centrifugal.

 

[IntenseBlue]

BTW, you WILL notice 6psi.

 

[65ShelbyClone]

Ive even heard of people having traction problems because of so much torque down low. I would be using the same mid-high rpm heads and the 3000 rpm cam. With a ported GT 40 lower intake. The only kits i can find a 6 psi kit... 6 psi isnt gona give much... is it?

First off, tell us what some of these other "high rpm" parts are that you have. Victor Jrs? TFS 3? It will give us a better idea of what you have. A ported GT-40 is good, but not a beast by any means. Second, I'll agree that that traction will be a problem with either type. Third, you WILL feel 6psi. The better the engine breathes to start with, the more power you get per psi of boost. Also, if your "lumpy" cam is for a N/A engine, you'll be giving up some power over a blower cam(which could possibly be milder than what you have).

What do you wan the car to be? Fast streeter or mostly drag? If you can stick that twin screw's off-idle power to ground, it would shave alot of E.T.

 

[macx]

On the KBs, there are 2 sizes of blowers,
you can change pulleys fairly easily (unlike the oem Eaton type like on the SuperCoupe) which will increase boost,
plus you can add an intercooler. I don't
think you'd run out of boost if you used the
right blower and set it up right. I've read tests
on VERY hi perf 4v Cobra motors that make a point
of saying the boost carries into the upper rpms
just fine (w/the bigger blower, the right pullies,
and the intercooler.)

One thing about a cam, you want a cam with fairly wide lobe centers, like minimum of 110, 112 or even 114 is generally better, so you don't blow a lot of your charge right out that open exhaust valve during overlap. Better check your "lumpy" cam, cuz the "lumpy" often comes from narrow lobe centers and lots of overlap, NOT good for a blower.

 

[ATI_blown92]

im running a p600b pro charger, as far as it goes i love it...im running 275 nitto 555r and as far as traction if i dont heat up my tires 1st gear doesnt happen if i hit it in 2nd start to spin at 3500 if i take off 1st to 3rd your spinning im running 9psi

 

[Lynx331]

Its gona be a street car.. Yes it will see the track often.. but i dont want a car that has to be trailed to the track to be raced. Im kinda leaning twoard the centri... it seems like it will have more to offer if the engine gets modified more heavily later on. Or can the kenne bell handle more cubic inches and 500+ hp? I just really dont know what to do here.. cuz i only want to do this once... plus i like the sound of the centrifugal lol Can i really "go wrong" with either blower?

 

[Mike92GT]

Go with a Vortech S-trim, it will do everything you want and more, plus I'm pretty sure it will be cheaper then most other blowers out there. Last time I checked, Summit had them for around $2500. With the stock pulleys and a UPR Powerpipe, I see 10lbs of boost on my 308. I'm very happy with mine, it's a 100% better then my old Powerdyne set-up

 

[bynummustang]

Its just my opinion, and I have never rode in a centri. supercharger, but the roots style are heavenly for me... 2500 RPM and BAM.

 

[mustangdaren]

I couldn't imagine having boost at 2k like on the kenny bell blowers. I have sorry iron gt40 heads and a sc-trim (5-6psi) and traction is a major problem 1st through 3rd. You can be driving 50mph, push the gas pedal down and blow the tires off which is a lot of fun but sucks if your racing. I think the car feels stronger even when I'm not making boost since adding the blower. I don't think you will be disappointed no matter which blower you decide to go with but one thing I have found out is boost is addictive. No matter how much you have, you'll want more.

 

[04sleeper]

A lot of my friends have had superchargers for quite some time now and I have done some installs myself. Knowing what I know now about both I like the twin screw better for a street car between the 2. But, with turbo kits being more and more prevalent, I would go with a HP turbo kit and be done with it.

You can change boost without changing pullies and there are no extra belts or belt slippage.

Also, you want to talk about torque curve, take a look at some dyno graphs on turbo cars.
JM .02

 

[Lynx331]

As far as turbos go i dont know much about them.. Is trhere anything u could tell me about them? I kno how they work.. exhuastgases spin turbine.. turbo lag etc... but are they really better for making power over the blower? how do u change boost on a turbo? Say u were making 10 psi on a single turbo system.. how would u increase the boost?

 

[BaXTeR3221]

Turbo is the way to go if you can afford it. Kits cost roughly twice what the superchargers cost and i wouldn't run one with out a custom tune. That being said, if you have the cash, thats deffinetly the way to go. You can adjust the boost from inside the car and it will make insane power. check out turbomustangs.com for more info.

 

[IntenseBlue]

Turbo lag from an actual kit is virtually non-existant as far as I've heard. The key is getting the proper size for your horsepower level. They make a bit more torque, mostly down low, and are more efficient than superchargers, meaning more power per psi. You can adjust the boost by having a boost controller or an adjustable wastegate.

 

[Gears & Crosses]

I'm curious, how do these blowers effect your gas mileage?

 

[04sleeper]

As far as turbos go i dont know much about them.. Is trhere anything u could tell me about them? I kno how they work.. exhuastgases spin turbine.. turbo lag etc... but are they really better for making power over the blower? how do u change boost on a turbo? Say u were making 10 psi on a single turbo system.. how would u increase the boost?

Like BaXTeR3221 mentioned. Check out turbomustangs.com. There is tons of info about Turbos and people can answer just about any question you can throw at them.

Turbo lag is not as much of an issue any more due to improved efficiency in turbo designs.

Yes they are really better in making power over a blower because they are more efficient. No power loss from belts to turn, etc...

There are boost controlers that you can mount inside your car that control the wastegate to turn the boost either up or down.

Kits cost roughly twice what the superchargers cost and i wouldn't run one with out a custom tune.

I would not say that. Turbo kits come with more complete systems. From everything to fuel pumps, injectors, mass airs, etc... to electric fans and intercoolers. Also with turbos they come with headers and usually come with all the exhaust pipes needed to run to your cat-back.

You are going to spend that on a supercharger system anyway by buying all the parts seperate.

As far as tuning goes, you should have ANY kind of forced induction tuned weather it is a supercharger or turbo.

 

[04sleeper]

I'm curious, how do these blowers effect your gas mileage?

Blowers or turbos can improve gas mileage depending on your driving habits.

On long highway trips I have seen as much as 3 to 4 MPG more with a supercharger.

Most people who have them are more apt to drive with the pedal down more just because it is there and they can. They will not get better gas mileage. They will end up getting worse.

Also most people who are building a can for more power are not really concerned with mileage.

 

[IntenseBlue]

Blowers or turbos can improve gas mileage depending on your driving habits.

On long highway trips I have seen as much as 3 to 4 MPG more with a supercharger.

Most people who have them are more apt to drive with the pedal down more just because it is there and they can. They will not get better gas mileage. They will end up getting worse.

Also most people who are building a can for more power are not really concerned with mileage.

Agreed.

 

[1991vert]

i thought if you run a turbo, you cant use a midpipe with cats or a midpipe at all or something like that?

aren't blowers more emissions friendly if you can even say that?

 

[IntenseBlue]

You can run a midpipe. With a single turbo, you have a downpipe insteat of a midpipe. Same thing, but one pipe instead of two. The turbo kits use the downpipe along with a y-pipe mounted backwards that'll attatch to your x/h pipe.