What diameter should my exhaust be?
What Size Exhaust Pipe Should I Use? The quick and easy way to choose what diameter pipe you will need from the headers to the mufflers is to go back to the old rule of thumb, that for every 100 horsepower, 1 inch of total pipe diameter is needed across the system.
What size is stock Miata exhaust?
As I recall, the stock size for the 1.8 engine exhaust is about 1.75 inches in diameter, and about 6 inches around the outside of the pipe. Most aftermarket “free-flow” exhausts begin at 2.25 inches (naturally aspirated) and stretch from 60 mm (2.37 inches), to 2.5 inches (turbo cars), and up.
How much horsepower does a 3-inch exhaust?
Our 3-inch exhaust baseline netted 527 whp at 19 psi. With the 3.5-inch exhaust, it climbed to 567 whp with a peak gain of 66 whp at 6000 rpm in fourth gear. At 29 psi, we went from a baseline of 699 to 740 whp. Peak gains here were 52 whp at 6100 rpm.
How much HP gain from straight pipe?
As stated in the intro, a correctly designed and tuned exhaust system can increase torque and horsepower across a wide range of the power band. While this gain usually isn’t “big” – we’re talking about a 2-3% increase – the modification offers a few benefits: An exhaust upgrade is relatively cheap.
What kind of exhaust system does a Mazda MX5 use?
Our cat back exhaust system. To enhance the sound, aesthetics and performance of the NC Mazda MX5 for either the 1.8L & 2.0L engine we have the option of a road type or louder race type cat back sports exhaust system manufactured from the same 2.5 inch/63.5mm stainless steel pipework
Do you need a larger exhaust in a Miata?
A larger diameter exhaust won’t necessarily hurt performance (unless you go for 2.5″ or more in diameter), but you won’t see a boost in horsepower or torque with anything larger. Basically, your MX5 will be louder, but it won’t go any faster. Adding a supercharger to your Miata does not always mean you need a larger diameter exhaust.
What is the straight pipe on a Miata MX5?
The RoadsterSport Race and similar straight pipe designs (SuperStreet, Superstreet Twin) are designed for the three pedal owners out there who love to zing these amazing sportscars to redline daily.
Is it OK to wrap exhaust headers on MX5?
See below for answers to the most common questions when shopping exhaust options for the MX5: Do NOT wrap headers. Wrapping headers VOIDS THE WARRANTY on every brand of header made. The wrap holds moisture and also gathers petroleum emissions from under the hood like any oil leaking (meaning eventually you can have a fire).