the need for a 3" exhaust?
19 February 2018, 10:55 PM
#1
Scooby Regular
Thread Starter
the need for a 3" exhaust?
I currently have a 3" cobra sport system on my blob, running 420bhp.
The wife, neighbours and several tracks would appreciate it if I lowered the db level, and I have to admit I would'nt mind too as the car is getting used more frequently.
My question is, I also have a cobra sport backbox in my shed but its 2.5", and the box is more of a traditional shape rather than the round can type thats on it at the moment, how much is this likely to affect performance? The car is in for a map tweek soon as a couple of things have changed so it would be a good time.
I would keep the 3" centre and downpipe.
The wife, neighbours and several tracks would appreciate it if I lowered the db level, and I have to admit I would'nt mind too as the car is getting used more frequently.
My question is, I also have a cobra sport backbox in my shed but its 2.5", and the box is more of a traditional shape rather than the round can type thats on it at the moment, how much is this likely to affect performance? The car is in for a map tweek soon as a couple of things have changed so it would be a good time.
I would keep the 3" centre and downpipe.
20 February 2018, 10:00 AM
#2
Scooby Regular
Join Date: May 2012
Location: Scotland
Posts: 168
Likes: 0
Received 0 Likes
on
0 Posts
Is the internal of the 2.5" back box straight a through like a tunnel with perforations all around?
If so it will affect performance a little but not as badly as if it had a convoluted route to take through the back box.
I would guess you wouldn't see 420bhp after the map tweak, but it would still be very close...
If so it will affect performance a little but not as badly as if it had a convoluted route to take through the back box.
I would guess you wouldn't see 420bhp after the map tweak, but it would still be very close...
Thread
Thread Starter
Forum
Replies
Last Post
brickboy
Wheels, Tyres & Brakes
8
03 March 2005 12:52 PM