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gearheads! Exhaust Question??

 
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Old 23 May 2003, 06:09 pm
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Default gearheads! Exhaust Question??

I had an exhaust run on my car, just a stock setup ,minus the muffler, and dual pipes out the back. I feel like maybe this was the wrong route for the turbo. I am asking what would be best for the turbo we have? A cat-back system? Or what I have with larger piping? Should I add a free flow muffler? What should I do? Thanks for any help.
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Old 23 May 2003, 08:23 pm
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The best route for a turbo would be 3 in downpipe, a 3 in straight pipe (no cat), and 3 in piping the rest of the way. Period. Backpressure works against the turbo, slowing down spool up time and lowering boost. Imagine you are holding a little propeller in your hand. You blow on it to get it spinning. Now you blow on it the opposite direction. What happens? Yes, thats right, it slows down. The same holds true for turbos.

This is physics, plain and simple. The Ideal Gas Law states that gas temperature, pressure, and volume are all related. Compress a gas (reduce the volume) and pressure and temperature goes up. Let it expand, and temperature and pressure go down. Increase the temperature, and the pressure goes up (in an enclosed space) or the volume goes up (it expands). Finally, gases want to flow from a high pressure area to a low pressure area, and the greater the difference, the bigger the push. This means that the greater the pressure difference from where gasses enter the turbine to where they exit, the faster it is going to spin the turbine.

For a more detailed explanation on how turbos work check out this page:
http://www.dsm.org/menu.epl?item=363
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03 PT Cruiser GT - 215 Hp-Airbox and Intake pipe silencers removed
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Old 23 May 2003, 09:35 pm
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well said[^],Finally some one else who understands this stuff!!!! Ah i see, you have a talon....that's why. I used to have a 1.8T
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Old 24 May 2003, 12:58 am
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Great summary. Thanks.
But the M1A1 is closer to 70 tons.
The Avco-Lycoming AGT-1500 puts out 1500hp
The power package including tranny is quite compact compared to the Daimler 12 cylinder turbo that powers the Leopard 2
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Old 25 May 2003, 03:06 pm
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yes very good explination.. thanks.. I used to ride in a bradley.. not as fast or as big or as much armor as the M1A1's .. I used to be a crunchy..
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Old 25 May 2003, 08:27 pm
Cool Cruiser
 
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YOu guys are right. YOu ant a nice setup with a straight through design, not a chambered muffler like the stock setup. My SRT-4 Exhaust should be ready in about 3 weeks. I beleive the downpipe will fit the GT, not sure if the catback will.
But rest assured, Ill be making one for you guys.


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Old 26 May 2003, 12:29 am
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put me on the list for a special discount test price
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Old 26 May 2003, 01:50 am
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i'm definitely in need of a down-pipe, then my in-&-outs will be complete[}]
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Old 27 May 2003, 02:51 am
Young Cruiser
 
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Yeah, put me on that list too. Cop_tzer, its cool to meet a fellow dsmer. I think my next project will involve a 1.8. Just got one thing to say: Dsms, turning ordinary people into mechanics since 1989
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90 Eagle Talon Tsi AWD - 300 Hp -K&N, 16g turbo, JE pistons, 3in Turbo back exhaust, mild port&polish
03 PT Cruiser GT - 215 Hp-Airbox and Intake pipe silencers removed
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Old 27 May 2003, 08:51 pm
Cool Cruiser
 
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I just wish i had one of you guys who would be willing to let me stay with your toy for a day or so. I want to make a hard pipe kit (replace rubber piping with metal pipes)as well as an exhaust. I really want to help you guys blow up your GT's
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E.D. 3\" Turbo Back, , HKS SSBOV, GReddy-e01 Boost controller, Greddy E-manage fuel management, Blitz Turbo Timer, JE pistons, Ported Head, E.D. Large Frontmount Intercooler, E.D. Tubular manifold with t3/t4 (prototype), IPP coilovers, Limited Slip.
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