exhaust size

M

MazdaSpeedTurbo

Member

:

No Car

• Jan 26, 2004

• #1

what size piping do we currently have on our stock msp'S? im looking to do a 5zigen fireball muffler what size pipes do we have?

 

T

Turbo Matty P

Banned

• Jan 26, 2004

• #2

2.25"....dont go any larger than 2.5" mandrel bent

 

A

azian6er

Asian Law Student

:

Mazda Speed Protege #987

• Jan 26, 2004

• #3

we have danm near 2.25 inch for our piping. The general concensus id 2.5 inch is good for the power our cars are capable of making.

-B

 

T

^tyrant^

Member

• Jan 26, 2004

• #4

well ill be damned i was going to post this same question this morning.

 

S

Stealth5

It's SABOTAGE

Contributor

:

02.5 Protege5

• Jan 26, 2004

• #5

how about mah ol' friend trey's supra. 3.5inch.

 

S

Stealth5

It's SABOTAGE

Contributor

:

02.5 Protege5

• Jan 26, 2004

• #6

how about mah ol' friend trey's supra. 3.5inch. 24psi

 

T

Turbo Matty P

Banned

• Jan 26, 2004

• #7

what about it? "ya ole friend trey" aint driving a mazdaspeed either.

 

J

jaymode

Member

• Jan 26, 2004

• #8

i thought 3 inch would give us more top end power especially with boost above 15psi?

 

M

MazdaSpeedTurbo

Member

:

No Car

• Jan 26, 2004

• #9

have fun running 15 lbvs only very little time to run 15 if on stock internals nubbed!

 

A

azian6er

Asian Law Student

:

Mazda Speed Protege #987

• Jan 26, 2004

• #10

jaymode said:

i thought 3 inch would give us more top end power especially with boost above 15psi?

Click to expand...

From the man Corky bell himself, his book states that 2.5 in. is sufficent up to and above 400 HP.

Now i dont know how accurate that is, but i know it is a general rule of thumb that turbos do not like backpressure. I went with 3inch and am not disappointed.

I know many if not all turbo cars should significantly higher HP numbers when the downpipe is either open or off and no exhaust is present.

Bigger isnt worse. It just leaves you room to make more HP and not worry about changing your exhaust.

Larger diameter piping is good for high HP applications. If you are just putting an exhaust on your msp and do not plan on doing many mods i would go with 2.5 in. If you are gonna up the boost in the future to > 15 psi then go for 3in.

-B

 

D

DiscreetSpeed

Member

:

03 MSP

• Jan 26, 2004

• #11

MazdaSpeedTurbo said:

have fun running 15 lbvs only very little time to run 15 if on stock internals nubbed!

Click to expand...

hehe...when i go run i open my cut-out which is right after the downpipe. i love the gains and wouldnt trade it for a cat-back....cheap and very effective. plus you can go from quiet to low growl in a 2 secs.

 

A

AutoBox

Member

:

rockin the awd.....

• Jan 26, 2004

• #12

u runnin a valve on ur exhaust discreet? i saw a motorized one once it seems pretty cool

 

0

02.5 P5

• Jan 26, 2004

• #13

3" all the way, huge difference!

 

K

KyRaceFan

Member

:

03 MSP.

• Jan 26, 2004

• #14

great job searching for the answer.. but good info in the thread anyways... so i wont gripe too much.

 

S

Striker187

Member

:

2008 MS3 GT

• Jan 26, 2004

• #15

here, i took measurements of the stock exhaust a while back. these are inner diameter measurements.

http://www.msprotege.com/vbb230/showthread.php?s=&threadid=36723&highlight=stock+exhaust

btw, go 5zigen!!! you won't regret it!!!

 

J

jersey_emt

Member

:

04 MSM #1089

• Jan 26, 2004

• #16

I plan on going 2.5" back all of the way...with one high-flow cat and a somewhat mild muffler....I don't want it to be too loud, plus I don't plan on boosting that high in the future.

Even an upgrade to 2.5" will net you significant gains.

 

0

03MSPRO

Member

:

05 Nissan Frontier CC 6 spd

• Jan 26, 2004

• #17

the stock pipe is the same as regular proteges, 50 mm=1.97 in.

 

K

KyRaceFan

Member

:

03 MSP.

• Jan 26, 2004

• #18

03MSPRO said:

the stock pipe is the same as regular proteges, 50 mm=1.97 in.

Click to expand...

did you measure?
Its 2.25 inches..

 

S

Striker187

Member

:

2008 MS3 GT

• Jan 26, 2004

• #19

my stock exhaust is in 3 pieces right now. the ID of the piping ranged from approximately:

1 11/16 - 2 3/8 inches = 1.6875" - 2.375" = 42.8625 mm - 60.325 mm

Click to expand...

i posted that info a while back. i measured those with a standard tape measure.

 

X

xenosilvia

Member

:

Kouki S14

• Jan 26, 2004

• #20

Stealth5 said:

how about mah ol' friend trey's supra. 3.5inch. 24psi

Click to expand...

That's pussy s***.

95mm (3.75") A'PEXi GT-Spec. 15 psi.