Sell my Vortech and get a KB or not? HELP!

Macksta · Aug 25, 2009

CobraRed_96_GT said:
Yup, it's a wonderful thing; here's mine.

Is that a good safe blower for a stock 4.6 bottom end with 40k miles? I am thinking on the kenne bell 2.1L next week and running @ 6ps just to be safe becasue they have all this advertized "knock protection" and such.

If i knew the tork tech was safe i would buy that just as well.

Let me know your thoughts if you will.

deftsound · Aug 25, 2009

CobraRed_96_GT said:
You must not know a lot of Mustang peeps, around here there are a ton at shows and meets. If they have a s/c 90% chance it's a centri, fox and 4.6

wierd, around here everyone has a kb or whipple

CobraRed_96_GT · Aug 25, 2009

deftsound said:
wierd, around here everyone has a kb or whipple

I wasn't talking 03/04 cobras. On all the 2V's (5.0 included) it's centri overload. Of course on terminators you're going to see more PD, lol.

Macksta said:
Is that a good safe blower for a stock 4.6 bottom end with 40k miles? I am thinking on the kenne bell 2.1L next week and running @ 6ps just to be safe becasue they have all this advertized "knock protection" and such.

If i knew the tork tech was safe i would buy that just as well.

Let me know your thoughts if you will.

That blower is not safe on a stock bottom end, im thinking even the stock pulley could throw a rod pretty good. The MP112, however, on a stock block should be great with a good tune.

Gearbanger 101 · Aug 25, 2009

Macksta said:
Is that a good safe blower for a stock 4.6 bottom end with 40k miles? I am thinking on the kenne bell 2.1L next week and running @ 6ps just to be safe becasue they have all this advertized "knock protection" and such.

If i knew the tork tech was safe i would buy that just as well.

Let me know your thoughts if you will.

Safe is a relative term. The blower pictured TVS1900 is made to move copious amount of air to support power levels into the 650-750hp range.

If you don't plan on making anywhere near that much jam, you'd be just as well going with their base kit and the Magnuson MP112 that comes equipped with it. The Manguson MP112 is essentially an improved version of the Eaton MP112 found on the GEN II Lightning’s and '03-'04 Cobra's. Both the inlet and outlet side of the case has been reshaped and redesigned for greater airflow and improved efficiency.

Every dyno test I've seen thus far shows the Tork Tech outperforming the comparable Kenne Bell 1.7/2.1L all the way across the board.

As for which blower will be "safer"....well, the immediate airflow provided by either Positive Displacement systems is all relative, but since the Magnuson MP112 is an air transfer system and isn't compressing and therefore heating the air within the unit itself all of the time like the Twin Screws do (which incidentally they do even when running around under vacuum), ACT's are going to be lower and therefore less prone to detonation and potential engine damage.

stanggt00 · Aug 26, 2009

yea if you have a blower man just build around it ....
it will cost less and if you drop some lower gears 3.73 or 4.10 in there that will more then make up for the low rpm boost..

you said you even put in pistons to work with the vortech.. just up the boost man and dont look back believe me you will not be mad centri-cars are some of the hards pulling cars on top-end out there..

also the plumming for an intercooler is not that hardon the vortech

GettinThere · Aug 26, 2009

stanggt00 said:
...and if you drop some lower gears 3.73 or 4.10 in there that will more then make up for the low rpm boost.

I was wondering this as well. Wouldn't 4.10 gears go well with a centri blower?

Gearbanger 101 · Aug 26, 2009

Gears will certainly help you get into your power band quicker, but you're still not going to get anywhere near the low end torque, responsiveness or drivability of a Positive Displacement blower. That and by going to the steeper gears, you're effectively taking a big chunk out of your potential fuel economy.

CobraRed_96_GT · Aug 26, 2009

gears != PD blower type boost.
Getting into the high rpm's quicker does not translate into making boost lower in the rpms.

stanggt00 · Aug 26, 2009

yea true but the effects is the same how often do u race at 2000 rpms lets not get to technical here the out come is the same and drivability of the centr-car is fine with a lot less traction problems

CobraRed_96_GT · Aug 26, 2009

stanggt00 said:
yea true but the effects is the same how often do u race at 2000 rpms lets not get to technical here the out come is the same and drivability of the centr-car is fine with a lot less traction problems

How often do you race?

GettinThere · Aug 27, 2009

Gearbanger 101 said:
...but you're still not going to get anywhere near the low end torque, responsiveness or drivability of a Positive Displacement blower...

I know that. I wasn't suggesting that a centri/gear combo would equate to a pd blower. But I've always thought that pd blower = very fun street car, and centri/gear = very good strip car.

Gearbanger 101 · Aug 27, 2009

GettinThere said:
I know that. I wasn't suggesting that a centri/gear combo would equate to a pd blower. But I've always thought that pd blower = very fun street car, and centri/gear = very good strip car.

I get what you're asking. I all reality, it won't equate to a PD blower, but it will allow you to rev the engine into its "sweet spot" where the blower starts to come on that much quicker. Will you see a huge difference from a dead stop WOT punch? With enough gear out back, probably not. But it gets old having only two speeds (stop and go) all the time. That power coming on that much faster, without changing where it comes on in your power band will make things harder to control, not easier.

Contrary to popular belief. Positive displacement blowers are actually very easy to control on the bottom end. It all done with your right foot. You want things to come on quick and dirty....you plant it. You want them to come on gradually and more controlled, you roll into it. Unlike a centrifugal which is RPM dependant and more violent with their power surge (especially when you start dropping gear ratio's) the PD blower produce very linear and predictable power curves.

Which is better....that's going to be up to the individual to decide. Some guys don't mind the stock like bottom end and the sudden rush of power in the mid range. I personally don't like anything that deviates from the stock drivability. The Twin Screw/Eaton addresses the one issue that the 4.6L mod motor lacks the most....low end torque. Having a Positive Displacement supercharger under the hood doesn't feel like you've got a power adder on your 4.6L....it feels like you've replaced your 4.6L with a 600ci big block. Manners and drivability remain unchanged.....better actually. That makes for a very livable, dare I say pleasant daily driver.

GettinThere · Aug 27, 2009

^10-4. If I were to go out now and buy a blower, it would be a KB or some other pd blower. However the OP already has a centrifugal blower and, IMHO should keep it, get 4.10 gears, and go from there.

darkside03gt · Aug 28, 2009

Thanks for all the advice and opinions guys. I think I am going to go with a KB. I have already found a deal on a used kit and if everything works out I am going to buy it. I have also potentialy found a buyer for my vortech. I do however wish tork techs kit was in deed 50 state legal because I like to be different when ever possible but KB it is.

Sell my Vortech and get a KB or not? HELP!

Macksta

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Please ask me how much my supercharger cost

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