exhaust question

[Matty]

losing back pressure is a good thing.

[sirbob]

A muffler will only add bling and noise, and will have minor benefical effects on backpressure and ultimate power.

[jules]

It was actually my understanding that the standard rear muffler was quite restrictive?

Jules

[Bevan]

It was actually my understanding that the standard rear muffler was quite restrictive?

Jules

Pretty sure you understand correctly. A muffler only change on an MX5 has fairly good benefits in comparison to other cars. Heard this from a few people.

[Sheck]

from what alot of ppl have been saying the most restrictive muffler is at the back because once the air gets there its not that hot and has un-expanded (dont want to say compressed cause it not really compressing).

Try a free'er flowing cat (like metal cat, others are a waste of time) and maybe a resonator in the middle instead of the muffler (if it has one - never seen a stock system before). Thats if you dont want your exhaust to drone like mad with the cannon on the back. - i know i'm getting over mine, and its turbo so its a nice sound not the n/a drone!!

Read an article in the latest HPI where they tested a cat back after market system and a stock GTR system (on either a GTR or a GTS-T) and found that the stock one made a little bit more power even though it was quieter and smaller diameter just. - not sure on details but its fairly corrrect

Dave