Centi or Twin-Screw?

RandoGT · June 18th, 2007, 12:21 AM

what would be better, a centrifugal s/c let's say a Vortech or a Twin-Screw s/c from Kenne Bell?

HMUSN · June 18th, 2007, 12:22 AM

what are your plans for the car?

RandoGT · June 18th, 2007, 12:55 AM

make it a fast daily driver but take it around on nights and have a fun time racing. over a long period of time i wanted to get the PI swap, full bolt-ons, suspension, and a s/c. just not sure which one to get. i've heard things about both but can't decide. any suggestions?

droppedbass87 · June 18th, 2007, 12:55 AM

haha i know my plans..i want to smoke everything that runs above 10s..i dont want to put a roll cage in my car..there aggrevating and ugly..

HMUSN · June 18th, 2007, 12:57 AM

the roots type(kb)
make instant boost which is great for street racing

the centrifugal makes more power over time.

it's up to you man.

hint... nitrous takes care of boost lag.

droppedbass87 · June 18th, 2007, 01:04 AM

haha hmusn^ +1

nes · June 18th, 2007, 02:54 AM

Originally Posted by RandoGT

make it a fast daily driver but take it around on nights and have a fun time racing. over a long period of time i wanted to get the PI swap, full bolt-ons, suspension, and a s/c. just not sure which one to get. i've heard things about both but can't decide. any suggestions?

considering this is your goal, i would go ahead and start with suspension or the blower (preferably kennebell, considering you want a fast daily for the streets, it will be perfect, but any centri will work to) dont bother with any boltons until afterwards, then you can start with the exhaust and throttle body and whatnot... reason being is some boltons are worthless on boosted applications, so y bother purchasing befor the blower...

just my 2 cents... and im a centri guy at heart, i just cant see my self spending 6k for 150 hp when i can get it for 4k...

MustangMatt96GT · June 18th, 2007, 10:43 AM

I vote for suspension first! And then the blower!!

RandoGT · June 18th, 2007, 11:57 AM

i shouldn't do a PI swap before i get the blower and all that?

nes · June 18th, 2007, 12:43 PM

Originally Posted by RandoGT

i shouldn't do a PI swap before i get the blower and all that?

no, because with the right blower, you can max out ur motor b4 the swap, y bother with the head swap and a blower if u cant us the blower anyway... also the headswap causes more compression which isnt the best for a street car and a blower... and for a few extra bux more then the headswap, u can pick up a used blower... like i said just my 2cents, u cant go wrong when you go blown...

Racinjason81 · June 18th, 2007, 12:54 PM

go with the roots type blower since it give you instant power.you definitely should do your suspension so you can plant the power.
you could get some non-PI heads that will outflow stock pi heads
and wont increase your CR ,I think Livernois has em

MustangMatt96GT · June 18th, 2007, 01:42 PM

I think for your aplication of DD and wanting to race on the street, a KB will work better for you! I also say dont do any head work except maybe some cams. The reason for this is because if you do head work and then the blower you will have your bottom end to worry about staying together. If it were my car, I would get the KB, then save up for a forged rotating assembly, and then do the new internals and heads at the same time!

RandoGT · June 18th, 2007, 09:03 PM

well what about the intake? no PI intake that i hear is so revered

MustangMatt96GT · June 18th, 2007, 10:52 PM

You can do the intake! It will actually benefit you too!

nes · June 18th, 2007, 11:17 PM

dont bother doing the intake if your going kennebell, ur gunna get rid of it anyway if you do...

MustangMatt96GT · June 18th, 2007, 11:20 PM

Yeah it does depend on the type of blower you use, but if you go with a centri I would definatly do the PI intake!! I know if I ever buy another NPI car the first mod will be the PI intake and cams! lol I love how mine pulls up top!

nes · June 19th, 2007, 02:38 AM

ya, so chose which one is REALISTIC for you (sorry kennebells arent for every1)

MustangMatt96GT · June 19th, 2007, 10:36 AM

I agree with nes on this one! You need to chose a blower that will fit your best needs! And in my case when and if I supercharge I will be going with a centri!

DrHolliday · June 19th, 2007, 02:02 PM

Pretty much the only thing you will need if you go the KB route is exhaust. The KB kit, if you get the CAI, MAF, and TB will replace all of your stock intake all the way to the heads.

And not to be an @sshole or anything, but something has been buggin me. A KB is not a roots style blower, it is a twin screw. Both roots and twin screw are positive displacement blowers, but the twin screw is more efficient and has less boost drop off than the roots.

Just wanted to clear that up.

And if you have any questions about the KB I can answer a good deal about install and other similar questions.

June 18th, 2007, 12:21 AM	#1
RandoGT Enthusiast 1998 Mustang GT Need to hit the track Join Date: May 2007 Location: Katy, TX Posts: 856 iTrader: 0 reviews	Centi or Twin-Screw? what would be better, a centrifugal s/c let's say a Vortech or a Twin-Screw s/c from Kenne Bell?

June 18th, 2007, 12:22 AM	#2
HMUSN Doc 1986 SVO 48.47@ 12.58 Join Date: Nov 2006 Posts: 37,050 iTrader: 11 reviews	what are your plans for the car? __________________

June 18th, 2007, 12:55 AM	#4
droppedbass87 Hardcore Enthusiast Join Date: Sep 2006 Location: diberville,mississippi Posts: 1,894 iTrader: 0 reviews	haha i know my plans..i want to smoke everything that runs above 10s..i dont want to put a roll cage in my car..there aggrevating and ugly.. __________________ fraziers transmission service..

June 18th, 2007, 12:57 AM	#5
HMUSN Doc 1986 SVO 48.47@ 12.58 Join Date: Nov 2006 Posts: 37,050 iTrader: 11 reviews	the roots type(kb) make instant boost which is great for street racing the centrifugal makes more power over time. it's up to you man. hint... nitrous takes care of boost lag. __________________

June 18th, 2007, 01:04 AM	#6
droppedbass87 Hardcore Enthusiast Join Date: Sep 2006 Location: diberville,mississippi Posts: 1,894 iTrader: 0 reviews	haha hmusn^ +1 __________________ fraziers transmission service..

June 18th, 2007, 10:43 AM	#8
MustangMatt96GT Proud American 1996 Mustang GT Join Date: Dec 2006 Location: Lakewood, CO Posts: 10,689 iTrader: 3 reviews	I vote for suspension first! And then the blower!! __________________ RIP Travis Billings Special Thanks to: Andrews Racing Transmissions Baseline Suspensions 25.3 SFI Chassis Build Never Lift Racecars

June 18th, 2007, 11:57 AM	#9
RandoGT Enthusiast 1998 Mustang GT Need to hit the track Join Date: May 2007 Location: Katy, TX Posts: 856 iTrader: 0 reviews	i shouldn't do a PI swap before i get the blower and all that?

June 18th, 2007, 12:54 PM	#11
Racinjason81 Hardcore Enthusiast Join Date: Feb 2007 Location: New jersey Posts: 1,559 iTrader: 0 reviews	go with the roots type blower since it give you instant power.you definitely should do your suspension so you can plant the power. you could get some non-PI heads that will outflow stock pi heads and wont increase your CR ,I think Livernois has em __________________ Heres a real funny video youtube.com/watch?v=ojB7KkaR03I VTEC stands for Very Torqueless Economy Car Honda stands for Hold On Not Done Accelerating 1991 LX 5.0 H/B(T-70 turbo coming soon)

June 18th, 2007, 01:42 PM	#12
MustangMatt96GT Proud American 1996 Mustang GT Join Date: Dec 2006 Location: Lakewood, CO Posts: 10,689 iTrader: 3 reviews	I think for your aplication of DD and wanting to race on the street, a KB will work better for you! I also say dont do any head work except maybe some cams. The reason for this is because if you do head work and then the blower you will have your bottom end to worry about staying together. If it were my car, I would get the KB, then save up for a forged rotating assembly, and then do the new internals and heads at the same time! __________________ RIP Travis Billings Special Thanks to: Andrews Racing Transmissions Baseline Suspensions 25.3 SFI Chassis Build Never Lift Racecars

June 18th, 2007, 09:03 PM	#13
RandoGT Enthusiast 1998 Mustang GT Need to hit the track Join Date: May 2007 Location: Katy, TX Posts: 856 iTrader: 0 reviews	well what about the intake? no PI intake that i hear is so revered

June 18th, 2007, 10:52 PM	#14
MustangMatt96GT Proud American 1996 Mustang GT Join Date: Dec 2006 Location: Lakewood, CO Posts: 10,689 iTrader: 3 reviews	You can do the intake! It will actually benefit you too! __________________ RIP Travis Billings Special Thanks to: Andrews Racing Transmissions Baseline Suspensions 25.3 SFI Chassis Build Never Lift Racecars

June 18th, 2007, 11:17 PM	#15
nes Enthusiast Join Date: May 2007 Posts: 962 iTrader: 0 reviews	dont bother doing the intake if your going kennebell, ur gunna get rid of it anyway if you do... __________________ silver 98gt, blown- sold laser red 98gt, stock- gave away stormy blue 09 mazda3-traded 09 subaru wrx- soon to be 12 sec. daily driver 1988 gt- toy

June 18th, 2007, 11:20 PM	#16
MustangMatt96GT Proud American 1996 Mustang GT Join Date: Dec 2006 Location: Lakewood, CO Posts: 10,689 iTrader: 3 reviews	Yeah it does depend on the type of blower you use, but if you go with a centri I would definatly do the PI intake!! I know if I ever buy another NPI car the first mod will be the PI intake and cams! lol I love how mine pulls up top! __________________ RIP Travis Billings Special Thanks to: Andrews Racing Transmissions Baseline Suspensions 25.3 SFI Chassis Build Never Lift Racecars

June 19th, 2007, 02:38 AM	#17
nes Enthusiast Join Date: May 2007 Posts: 962 iTrader: 0 reviews	ya, so chose which one is REALISTIC for you (sorry kennebells arent for every1) __________________ silver 98gt, blown- sold laser red 98gt, stock- gave away stormy blue 09 mazda3-traded 09 subaru wrx- soon to be 12 sec. daily driver 1988 gt- toy

June 19th, 2007, 10:36 AM	#18
MustangMatt96GT Proud American 1996 Mustang GT Join Date: Dec 2006 Location: Lakewood, CO Posts: 10,689 iTrader: 3 reviews	I agree with nes on this one! You need to chose a blower that will fit your best needs! And in my case when and if I supercharge I will be going with a centri! __________________ RIP Travis Billings Special Thanks to: Andrews Racing Transmissions Baseline Suspensions 25.3 SFI Chassis Build Never Lift Racecars

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June 19th, 2007, 02:02 PM	#19
DrHolliday Enthusiast Join Date: Mar 2007 Location: New Port, NC Posts: 717 iTrader: 0 reviews	Pretty much the only thing you will need if you go the KB route is exhaust. The KB kit, if you get the CAI, MAF, and TB will replace all of your stock intake all the way to the heads. And not to be an @sshole or anything, but something has been buggin me. A KB is not a roots style blower, it is a twin screw. Both roots and twin screw are positive displacement blowers, but the twin screw is more efficient and has less boost drop off than the roots. Just wanted to clear that up. And if you have any questions about the KB I can answer a good deal about install and other similar questions. __________________ Mustangless atm 2006 2500 HD Diesel. Built allison trans and other goodies

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