-
25th June 2008, 12:20 PM
#1
TD5 3 inch exhaust.
I'm going in to have the middle pipe put in tomorrow, and while talking to him, he said hes done a few with a 3 inch straight through and had good results. Said a lot more power and a good whistle blah blah blah. (salesmen talk)
The company is a reputable company so I don't doubt him really. The note is a worry for me. depending on the level, turbo whistle can get a bit obnoxious IMO but Im not much to care about what people think of me.
Im after real feedback on how exhaust noise carries through to the inside.
And is there a worth while power/economy increase.
-
25th June 2008, 12:27 PM
#2
from TD5Alive.com
Interesting.
Why didn't we make a 3" system? A 3 inch bore system would not be appropriate for Td5, since the turbo outlet is only 2 1/4 inches in diameter. Age old (Proven) tuning theory states that the optimal turbo downpipe should be 10% larger in diameter than the turbo casting outlet port. This is precicely why land rover chose 2 1/2", as it's a perfect match to the turbo. Using 2 1/2" pipe maintains a rapid flow of exhaust gasses to get them out quickly! Using 3" pipe would reduce the velocity of exhaust gasses, their fore retaining excess heat at the turbo, and of course the fragile exhaust manifold casting. Another factor is the reduction of back pressure you'd get from a 3" exhaust, as the wide open space of the exhaust takes more gas to fill it, and hence push out the tailpipe. The result could poentially cause turbo overspeed, which can seriously decrease the lifespan of your turbo!
-
25th June 2008, 02:34 PM
#3
my turbo exit is 2 and 3/4. but i have a 3'' dump fitted.
if your only replacing the center pipe/ muffler you wont need to worrie about the turbo pipe.
and you wont get a noise whistle till you remove all the mufflers. been there tried that
the OE land rover exhaust on my 90 was not 2 and 1/2 it was 70mm (2,3/4). 3'' all the way with just the rear glass packed muffler will be fine, as to the same system in 2,3/4. the key is mandrel bends!
cheers phil
Posting Permissions
- You may not post new threads
- You may not post replies
- You may not post attachments
- You may not edit your posts
-
Forum Rules
Search AULRO.com ONLY!
|
Search All the Web!
|
Reply With Quote
Bookmarks