This is from another forum, going from a 2.5" exhaust to a 3" exhaust. There was a little more boost added and the downpipe type was changed from a 2.5 split straight tube downpipe (this is for a gasser) to a 3" split bellmouth downpipe.
Quite an improvement! We cannot see how much was due to the exhaust diameter alone and not to the amount of gain is definitely more than just due to higher boost.
I saw that too. I think that they said it was also tuned. So for 70-100 ft lbs and hp gained, lets say, 50-70% of that was due to tuning and the ability to raise boost due to better exhaust. So about 30-50 hp and torque was due to the exhaust. This is all a guess, of course, since there is no apples-apples comparison.
for a 300zx twin turbo...upgraded fuel system, and upgraded turbos and supporting mods. It's a 3.0L gasser. This person had the car fine tuned and switched from a 2.5to a 3" exhuast so it's not an apples-apples comparo.
Yeah, just looking at it you can tell it's not a diesel. The powerband and the rpm range....I don't think there are any passenger car diesels that spin to 6600rpm His point was the exhaust upgrade.
I totally agree with you about the larger exhaust almost always being better on turbo cars, but again, this example is somewhat lessened due to the lack of an apples-apples.
I'm considering buying an A3 tdi. The car has 60k miles and good maint. history. I don't want to buy a car that is not dependable, so would like advise on what to expect in maintenance cost and if well maintained it would be a reliable car. I keep reading horror stories on the VW TDI problems...
Hi all, i have a 2012 VW Amarok,
I bought this car to build up and im stuck ive spent 2k at mechanics who have no clue what is wrong.
I have made a video to show what i have done please see link.
I have replaced sensors etc but still can't get it working!
All advice and help is...
In before answers like just delete it or similar, i'm just asking if it's doable, im aware of all the different not so legal ways to mod it out.
So the question i have is somewhat simple and complicated at the same time, can you make a "high flow" exhaust system for a diesel with a DPF from a...
Hi,
I wonder if anyone can help. I have a Kia Carens 2.0 CRDI 2009 that wont start. What I have found is that if I remove the vacuum hose from Wastegate actuator valve on turbo it starts and runs but not any real power (as you would expect with no turbo control). If I re attach the hose it...
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His point was the exhaust upgrade.
