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Registered:
June 2003
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I supported Toymods
Location:
Perth, Western Australia
Registered:
December 2002
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Re: 3" zorst
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Tue, 25 November 2003 10:35
 
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My CT20 built boost over the wastegate from around 4000rpm with my 3" mandrel bent system, mind you I never bothered to check if it was the exhaust or the wastegate. The current T28 holds boost, but is also a better designed turbo over the CT20.
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Registered:
June 2003
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Re: 3" zorst
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Tue, 25 November 2003 10:45
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~must be getting sick of questions by now, when did the ct20 spool with the 3" - and i recall you saying there was a noticable drone, what about idle?
why did you upgrade to the t28, can you still use the stock ecu with the t28? spool quicker or what? did the ct20 run out of puff at like 5000rpm like mine does(small exhaust still)
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I supported Toymods
Location:
Perth, Western Australia
Registered:
December 2002
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Re: 3" zorst
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Tue, 25 November 2003 15:27
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Can't remember exactly the range of the Ct20, it's been nearly three years since I ran with one, but think it started getting fun around 2200/2300, and was still pulling strong at 6000, before I changed gear. The car is louder than most at idle and at revs inside the car, however have been told it's not noticably loud outside. The only muffling is a Dynomax Straight Through Stainless Steel Muffler at the rear (also 3" diameter).
I upgraded to the T28 as it's simply a better turbo. I use the car for alot of motorsport, so wanted a turbo that came in relatively early and progressive. The current setup starts around 2100rpmish, and has loads of torque through the 2300-4000+ rev range - I can leave the line at 1800rpm and still get wheel spin (back to an open centre diff at the moment). Yes I still use the stock ECU (both ignition and fuel comps), and have had the AFM recalibrated, but as I said in an earlier thread, am not sure if this was due to the new turbo, or simply a tuning requirement?
For the street, my recommendation to you is still to go with a 2.5" mandrel bent system, paying attention to the dump pipe area for flow and oxy sensor location.
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