Thank you for "coming to my rescue" and for putting this
s&!t-eating grin on my face! Yep, this could be a costly venture,
but the end result is making me drool with anticipation.
Chuck Robbins
'99 Dakota Sport
http://www.members.home.com/clrobbins/dakota.htm
> With a twin turbo setup, you can optimize one turbo for low RPM's and try
> to diminish the turbo lag.
>
> In general, a turbo can reach much greater boost levels than a SC.
> Remember too that a SC has to be driven by the engine itself which is a
> substantial parasitic loss. For example an SC providing an 8PSI boost
> level might take away 50+hp from the engine just to turn it! The turbo's
> are turned by the exhaust flow. If there isn't any exhaust flow, there
> isn't any boost! Hence the reason for "turbo lag" at low RPM's. SC cars
> have the power almost immediately. Much superior for low rpm/high torque
> needs. But you're not going to get a street SC with much more than 10
PSI.
> Even relatively small single turbo's can make 10PSI look like child's
play.
>
> So the short answer is that a twin turbo setup will probably kick an SC,
> BUT!!! You can't simply slap major boost on a stock 3.9 (or nearly any
> stock engine). I really couldn't imagine putting more than 8 psi through
a
> stock 3.9. I know I'm pretty conservative, but for most of you I doubt if
> you're really looking for dedicated drag toys. For 8 psi, twin turbos is
> major league overkill!
>
> Now if somebody wants to completely rebuild and modify their 3.9, then you
> can have some serious fun with a twin turbo setup!!!
>
> Steve Ekstrand, Pasadena, CA Driver: '00 Dakota CC SLT+ 4.7L 3.92SG 255's
> Stacey's Driver: '00 Inferno Red Intrepid ES-3.2L-24V Autostick w/Leather
> Race Car: 69 1/2 Road Runner 440-6 (ex-NHRA SS/GA future B or C/SA???)
> Project Car: 69 Barracuda Notchback (Orig. 318, now 360w/Edelbrock Heads)
> Homepage: http://sites.netscape.net/professormopar/homepage
>
>
> ----- Original Message -----
> From: "Chuck Robbins" <intense99dak@home.com>
> To: <dakota-truck@buffnet.net>
> Sent: Wednesday, April 26, 2000 11:50 AM
> Subject: DML: Re: Re: SciTeck-twin turbos (Jason)
>
>
> | I'm still learning about all of this and there are a lot of
> | other membrs who could explain better then I can, but ...
> | This twin turbo set-up (for v6's) involves two sequential
> | turbos. The first kicks in with low rpm's and the second kicks in
> | with mid to high rpm's. Therefore virtually eliminating any
> | turbo lag.
> | How do they compare to a supercharger? First and foremost
> | the supercharger is a lot simpler to install & maintain. I don't
> | know specifics, but that is the impression I've gotten from the DML
> | and a few others. As for horsepower & torque, I'm inclined to
> | say the the twin turbo set-up will blow the doors off a supercharger.
> | I know that this leaves a lot open and I'm hoping someone with
> | more knowledge steps in. I have yet to talk to Sciteck personally,
> | so there are a lot of unknowns in this.
> |
> | Chuck Robbins
> | '99 Dakota Sport
> | http://www.members.home.com/clrobbins/dakota.htm
> |
> | > What are twin turbos and how do they compare to a supercharger?
> | >
> | > Jason
> | >
> | >
> | > > I just received an email from Sci-Teck saying that pricing
> | > > is going to take another week or so. I guess they would like
> | > > to see a few more people at least interested in the turbos.
> | > > If you are interested, give them an email at
> | > > SciTeckMiami@aol.com You don't have to committ now, just
> | > > "show an interest".
> | > > Hopefully there will be a few more interested people as I am
> | > > really looking forward to having the turbos on my Dak :)
> | > >
> | > > Chuck Robbins
> | > > '99 Dakota Sport
> | > > http://www.members.home.com/clrobbins/dakota.htm
> | > >
> | > >
> | > >
> | >
> | >
> | >
> |
> |
>
>
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