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Mazda Engine General \  looking to redo full exhaust, looking for recomendations

looking to redo full exhaust, looking for recomendations

Mazda Engine General Mazda Engine Mazda Tech
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replies 17
following 6
 
jimbeater   +1y
hey guys, yeah im looking to redo the exhaust front to back on my 92 extended cab b22 FI. 5 speed.

i have to pull a pacesetter header from my parts truck and then am going to buy a carsound/magnaflow high flow cat, and a muffler... probabaly will add a resonator in there too... i am not aiming for loud. i would love to get a decent sound out of it though... no raspyness hopefully, and as free as can be... not that im expecting big HP out of the lil beast...

oh and i am a cheap bastard, so there wont be no flowmaster or anything 'showworthy' on this truck,,,lol

so what are the fart cans that people often get that have the silencer you can put in the end? thats what im considering, cause i know they are highflow and they are cheap... but can they be quiet with that silencer?

also what size should i do, i was thinking 2 1/4", im sure many will say that 2" would be very adequate for the lil 22... whats stock like 1 1/2? lol this will be a crush bent setup also, no mandrel.

and where should i have my muffler end up?
dvsdev   +1y
Hey man, I've got extractors made with 1 1/4" primaries, joining into 2 1/4" exhaust just under the cab, no cat into a ugly muffler from the exhaust shop then 2 1/4" over the frame and it comes out in front of the lh rear wheel, sounds pretty good for a 2ltr truck motor.
Had no problems with the cops with noise, it has a slight rasp if I really thrash it though when it gets up high in the revs and pops on decelaration if in 2nd or 3rd going downhill at too high a speed.
I'm pretty happy with my system.
jimbeater   +1y
extractors? meaning manifold flange/ custom exhaust manny? just curious

ok so 2 1/4". notice any HP or torque gain/loss on the butt dyno?

and yeah i would like a touch of sound... but definitely not loud, as i do hwy driving too, and with rpms at 3500 cruising... i just dont want a headache... but go figure the stereo is always pounding too...lol thats why im thinking one of the can mufflers with the 'silencer' slide in... i just dont know if that does anything.
dvsdev   +1y
Sorry we sometimes call things different things here, my "extractors" have a flat flange bolted to the block then 4x 1 1/4" tubes run from each cylinder which then join into a 2 1/4" at the bottom of the firewall.
here's a pic, hope it helps

thread post photo


Power seems to be up over what was on there before (1" pea shooter) , and since it leans out the motor a bit you usually get a small increase in power, I haven't had it dyno'd though (as them laughing often offends)
bodied b2600zx (josh)   +1y
So an extractor is a header. . .


-Josh
jimbeater   +1y
lol no dynos, '(as them laughing often offends)'... understood.

butt dyno have any reaction?

i checked ebay today for mufflers... 112 pages of gheyness... $2 and $60 shipping... lol

i'm going to price muffler and carsound cat at local auto stores... i have got the cat for $60-80 before, and im sure a no name can muffler with silencer will be not much more than $40
jester   +1y
pacesetter header, 2.25 pipe, 2.25 Cherry bomb TURBO muffler (not the bottle), I got mine for $32.00 at the local parts store about 10 inches of 3 inch pipe off the back of the muffler for a boom tube dumped just before the rear wheel. cheap and sounds mellow,throaty without the Honda fart cannon sound. Try to just use squish bent pipe instead of wrinkle wall if you can. not as cheap as the wrinkle stuff, but a hellova lot cheaper than mandrel. HTH
dvsdev   +1y
Yeah headers, I knew there was another name for them.
I can feel a definite difference using my butt dyno, more pulling power too which I noticed when it was fully laden with camping gear going up our mountainous terrain we have over here.
jimbeater   +1y
good to know someone felt a difference on the butt dyno... and more pulling torque too... i was going up a long hill last weekend, and noticed i started at 110km/h and was down to 80 at the top...lol
dvsdev   +1y
Fully laiden?
I filled up my tray with camping stuff at christmas and put a 80kg steel lid on my ute and had to change down a few gears to get up a massive hill but when it's just normal travelling around town going up normal massive hills it does it not a problem, granted I have my foot to the floor but it gets up them all now.