Date: 6 May 2005 06:55:50 -0700
From: "es" <>
Subject: Re: rrett t3 turbo

Dexter J wrote: > Salutations: > > On Fri, 06 May 2005 09:01:49 +0100, Grunff <> wrote: > > James Sweet wrote: > > > >>> es wrote: > >>> > >>>> Hi i have a 1990 saab 9000 cd 2.0 turbo with a garrett t25 turbo on it > >>>> can i run the t3 after the t25 so it wll be twin turbo the t25 will be > >>>> the lowend and the t3 will be the highend boost. or is it better to > >>>> just run the t3 > >>>> > >>>> and where can i get a good t3 turbo > >>> > >>> Do you have any idea what would be involved in doing this? > >>> > >>> More to the point, do you know how crap the car will drive if you do > >>> this? > >>> > >> It should drive pretty well, just more lag. I've got a car with a T3 > >> and like it, though it's not a 9000. > > > > No, I'm referring to "can i run the t3 after the t25 so it wll be twin > > turbo". It would not drive well. > > Agreed Grunff. > > If someone really wanted to go twin turbo - you might get away designing a > custom split header and IC intake so that one turbo spooled up earlier > than the other and then didn't back flow into the smaller turbo. > > To do this - you would really have to do some heavy work on which pair of > turbo's you would need to pull it off. T3 and T25 wouldn't be it. > Personally, I think you would want to match a smaller pair that simply had > different boost controllers for the same affect. > > You would then have to custom chip all the computer controllers from fuel > rates to waste gates to account for the higher rates of pressure so as to > stop the car from cutting back ignition to account for what it would > perceive as being an over boost situation. You would need to build some > sort of airflow kit to bleed off the extra heat under the hood too. > > Common wisdom on the greater problem is to swap out the intake cam with a > 2.0 N/A intake cam (which is claimed to increase lower end torque in turbo > engines). Go with a 3 inch exhaust system from the turbo flange to the > tailpipe, changing out the turbo after talking to Maptune about which chip > and turbo to accommodate the new curves. This will impact total top end - > but - will give you earlier and stronger boost through anything to 110mph. > > Personally - I think you might be better off simply going with a fresh > stock turbo, a more open exhaust, bigger IC and new chips first (don't > forget to pull the AC unit) - and then see where that takes you. > > Be warned, there is *a lot* of kit on both sides of the crank stubs that > needs uprating as befits your engine modifications. > > -- > > Radio Free Dexterdyne Top Tune o'be-do-da-day > Doris Day - Whatever Will Be > > > all tunes - no cookies no subscription no weather no ads > no news no phone in no sign up required - all the Time OK i think i will go with the one i got right now and just 3" down pipe. will it be better if i get the intake manfoled from the newer 2.3 turbo saab 9000 engein. where can i get one of thoes and i have a M boost controler right now what do u guys think i should run for psi im at 14 right no. i heard it would be better if i run the fiul presher regulater from a non turbo saab is that true. i just wont to have a better topend on the car what is the best way to do this bcs the lowend is really nice as is. later when i get the t28 in there it should be really nice does enyone know where i can get a good t28 THANKS

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