81_280ZX

What do you think about flowmasters on an 81 zx nonturbo?? or do you think i should just go with motorsport headers and exhaust??

yo2001

Flowmaster is geat. you have to relocate the muffler to under the car for best result. I'm running MSA header with 2-chamber Flowmaster Deltaflow. It's loud.

81_280ZX

How much did all that cost, and how many horses are added??

samzman

How do the flowmasters sound are they deep in tone, on the Z's. My toyota sounded good, I'll probly try them out anyway. Does any one know how the Dynamax glass pack style muffs sound(race use only ones), on a Z.

yo2001

My car sounds soooo good : ) I got 274deg cam too so it really thumps. I have people even the mechanics come and ask if it's 350 or 302. I got my muffler tucked pretty good also have the car lowered so you can't see my muffler. It's leveled with the frame rail.

yo2001

flowmaster is like $60. you can get them cheaper I think. local muffler shop should charge you about $150 for new pipes. I did my own so it was like $20 for flange. I don't think there was much HP gain, but the engine rev smoother.

yo2001

it's deep, not as deep as 350 but deeper than 302.

81Datsun280ZX

did you put your flowmaster muffler under the car in the tranny well?

yo2001

yap, where the pre-muffler use to be

81_280ZX

So do yall think i should just get headers and a new pipe out of motorsport or something... i wanna new tone but also more horses... and i dont want the muffler or whatever coming out the bottom...

samzman

Which model of Flowmaster are you using, a universal or 1 for a Z.

yo2001

2 1/2 inch Deltaflow universal center in/center out. I have use one for 5.0 too. both works fine but 5.0 muffler is offset in/off set out so you would need to lot of curbed pipes.

yo2001

I seen the Mac muffler on 5.0. they are like flowmaster but in more rigid case. I heard the 5.0 gains goo bit of power from Mac but I don't think L28 needs that much flow without major head work. But they are nice mufflers

yo2001

I would get a MSA header and choose whatever kind of muffler you want then take your car to a local muffler shop to get the muffler of your choice installed.

tyco1983

I've done alot of research on exhaust in choosing the best set up for my z. I'm currently running around 200hp to the rear wheels with my high compression 2.8L z motor. I'm going with Borla on my z mated up to 2.5 inch pipes. You see, Flowmaster is a baffle style muffler. These baffle mufflers rely on restrictive metal baffles to deaden the sound as opposed to a Borla style muffler. Borla muffler's have a straight through, perforated interior design, and rely on ceramic coated fiberglass to deaden the sound. These mufflers allow maximum flow with minimum pipe size. This max flow is the very definition of "backpressure" or the "scavaging effect". It is the velocity of the exhaust pulses through the system that aid in "scavaging" or extracting exhaust from the cylinders during the exhaust stroke. I spent alot of time on the phone speaking with a Borla representative who owns a z and showcases it every year during the Motorsport Auto Show and it is becomming more widely known that flowmaster is not the best performance muffler contrary to popular belief. Borla has a million mile warranty which is great. So, though the Flowmaster is a great sounding muffler, it does not perform as well as others.

ShredZ

Is the Borla very loud? Do you just run headers straight to the Borla muffler in back?

tyco1983

Depending on the set up you have, a Borla can be loud. You can run a pre muffler and a final muffler to keep it quieter so you won't having those stuffy ears or you can go with a single multi-core muffler which tends to be quieter when cruising then screamin when you get on it. If louder is what you want though, you can choose from many of their straight through designs. It just depends, they have a lot of different mufflers with lots of different sound characteristics. Call and tell them exactly what you want, and they will help you find what's best for you.

81_280ZX

How much did your set up cost?