TDI300 Exhaust upgrades??

Thanks for the replys even though they went abit off topic lol, obviously turbo, intercooler, injector pump tweaks are going to make a difference but on my salary its not an option at the moment, probly should focus on getting an exhaust after my flex pipe broke off from the turbo (running no exhaust at all) i can tell you all having no exhaust like i do now goes the worst having the center muffler cut out and put stright threw muffler in went the best and having stock exhaust just went normal, so thats lead me to beleive a not so much restrictive 2.5inch system might be pretty good for it. ive heard the less back pressure for a turbo d is better but running no exhuast is really no benifit, its rediculously loud and people look at me angrily although i do like the turbo whistle haha.

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Originally Posted by big guy

Thank you for your words of rudeness.
Do I blush now?

Are we talking road or F1 cars?
We are talking about a ancient diesel design that is designed to last not just good for one race or a quick drag.

A tuned pipe mandrel or other, 2,3 or anything can make a difference sure.
Taking out a muffler or putting a straight through exhaust in willy nilly will not.

I spend many hours in my mates exhaust technique shop selling and installing all sorts of stuff mainly that looks good and in general just makes more noise.
Just paint cans really but thats what people like.

We sold the odd Remus system too, they are not loud but tuned to the exact specification of each car. They cost a bundle and all in all, even their german sales rep tells us that its tiny, its a feel good thing.

Do exhaust, injection, cams clutch and driveline mods and now you are talking.

Now please Frank if you want to insult me do it via PM or better still, refrain from doing so in general. If I contribute to a post its from real life experience, if you feel I am wrong thats fine but let that be the end of it.

Big loud exhausts in general do not help, properly tuned for a specific engine will but still only marginal. ;)

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I'm not trying to insult you or be rude, the fact is that what you said is not correct and then you say "There is no science to back that up anywhere", I'm afraid you are totally incorrect, there is a huge amount of scientific (your word) evidence proving the opposite of what you say.
There is a very good book Published by SA Designs called "Tuning for Performance and Economy" a great deal of the book is dedicated to improved airflow thru the inlet and Exhaust, gives you Dyno readings with and without exhaust fitted, good reading, and that's only one of many books on the subject.
Also when I contribute to a post it is from real life, I have been a mechanic for 40+ years, I have worked in Motorsport, Trucks, Mining, Motorbikes and general Mechanicing, so I have had a little experience as well.
A practical example, I had my BA Falcon GT on the dyno, by just removing the the top of the air filter box I got an increase of 8Kw at the rear wheels, with just the headers fitted and no mufflers and no tailpipes I got another 10Kw at the rear wheels. So by unrestricting the inlet and exhaust I had a Gain of 18Kw at the wheels. Where is the evidence to back your story, I would be interested to see it, forgive me if I upset you, it wasn't intended to do so, but if you are going to make a statement that has no basis in fact then you must expect some sort of rebuff, Regards Frank.

can't beat the truck turbo spool sound coming from a decent exhaust on a diesel =D

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Originally Posted by Tank

I'm not trying to insult you or be rude, the fact is that what you said is not correct and then you say "There is no science to back that up anywhere", I'm afraid you are totally incorrect, there is a huge amount of scientific (your word) evidence proving the opposite of what you say.
There is a very good book Published by SA Designs called "Tuning for Performance and Economy" a great deal of the book is dedicated to improved airflow thru the inlet and Exhaust, gives you Dyno readings with and without exhaust fitted, good reading, and that's only one of many books on the subject.
Also when I contribute to a post it is from real life, I have been a mechanic for 40+ years, I have worked in Motorsport, Trucks, Mining, Motorbikes and general Mechanicing, so I have had a little experience as well.
A practical example, I had my BA Falcon GT on the dyno, by just removing the the top of the air filter box I got an increase of 8Kw at the rear wheels, with just the headers fitted and no mufflers and no tailpipes I got another 10Kw at the rear wheels. So by unrestricting the inlet and exhaust I had a Gain of 18Kw at the wheels. Where is the evidence to back your story, I would be interested to see it, forgive me if I upset you, it wasn't intended to do so, but if you are going to make a statement that has no basis in fact then you must expect some sort of rebuff, Regards Frank.

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PM send and received.

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Originally Posted by Tank

I'm not trying to insult you or be rude, the fact is that what you said is not correct and then you say "There is no science to back that up anywhere", I'm afraid you are totally incorrect, there is a huge amount of scientific (your word) evidence proving the opposite of what you say.
There is a very good book Published by SA Designs called "Tuning for Performance and Economy" a great deal of the book is dedicated to improved airflow thru the inlet and Exhaust, gives you Dyno readings with and without exhaust fitted, good reading, and that's only one of many books on the subject.
Also when I contribute to a post it is from real life, I have been a mechanic for 40+ years, I have worked in Motorsport, Trucks, Mining, Motorbikes and general Mechanicing, so I have had a little experience as well.
A practical example, I had my BA Falcon GT on the dyno, by just removing the the top of the air filter box I got an increase of 8Kw at the rear wheels, with just the headers fitted and no mufflers and no tailpipes I got another 10Kw at the rear wheels. So by unrestricting the inlet and exhaust I had a Gain of 18Kw at the wheels. Where is the evidence to back your story, I would be interested to see it, forgive me if I upset you, it wasn't intended to do so, but if you are going to make a statement that has no basis in fact then you must expect some sort of rebuff, Regards Frank.

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Geez Frank

Anything you haven't been, haven't done ????

In THIS POST you were ......

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Originally Posted by Tank

I have been a Ticketed rigger for over 30 years, so I have some experience in this field,

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Pull your head in and mind your manners please.:mad:

Stevo

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Originally Posted by jt_tdi

Thanks for the replys even though they went abit off topic lol, obviously turbo, intercooler, injector pump tweaks are going to make a difference but on my salary its not an option at the moment, probly should focus on getting an exhaust after my flex pipe broke off from the turbo (running no exhaust at all) i can tell you all having no exhaust like i do now goes the worst having the center muffler cut out and put stright threw muffler in went the best and having stock exhaust just went normal, so thats lead me to beleive a not so much restrictive 2.5inch system might be pretty good for it. ive heard the less back pressure for a turbo d is better but running no exhuast is really no benifit, its rediculously loud and people look at me angrily although i do like the turbo whistle haha.

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Look mate at the end of the day the main thing is that your happy with the outcome on what ever decision you make. All trucks are different in one way or another and some might get a whistle from the turbo and some might not. I went with a 2 and a half inch straight through muffler which benifits me as the egt drops and gets out quicker that what I wanted and that's what I got. So go for it and hope all works out.

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Originally Posted by sschmez

Geez Frank

Anything you haven't been, haven't done ????

In THIS POST you were ......


Pull your head in and mind your manners please.:mad:

Stevo

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That's right, started a mechanics apprenticeship when I was 15 (now 63) and later while working in the mining industry decided to do a Riggers ticket.
Am now a Class 1 Ticketed rigger, a ticketed Dogman, and Mobile crane driver's ticket, ticketed Scaffolder. Also have Class 5 drivers lic., I am now about to do a course to get a welders ticket, anything else you would like to know, anyway it might be better if you pull your head in sport, nobody asked you to butt in, Regards Frank.

You were rude to me that time and rude to others this time...
that time you were wrong as well .........

Mind your manners and don't "sport" me "CHAMP"

There have to be something wrong with the water down south :eek:
Boys we are here to have fun, and if someone have a bad day we just have to ignore their manners if any :D
Have a glass of red :p

Umm, anyway. Turbo restriction is before the exhaust vaine on the turbo. Any time that you remove "restriction" post turbo is going to be a good thing. Removing the center muffler on a Tdi Disco is going to give you better EGT's (ie. lower). For this alone, it will be worth while. It will help performance a little bit (you will still have the main muffler at the back so this will help quiten down the turbo) but, like I said, the decrease in EGT alone will be worth while. It is a cheap and easy mod to do, and once you have done it, it will be easy to change the rest of the system when funds allow. The best exhaust for a turbo application is one that increases in diameter as close to the back of the turbo as possible (so say that the outlet on the back of your turbo is 3", you would want to go to 4"), and is short and restriction free (ie. straight through).