Best HorsePower Gains and Best Sounding Exhaust???

[WHaaaaaa]

I was trying to find the Best Exhaust for a decent price??? I was thinking about the Apexi GT-Spec but i dunno give me some opinions and some sound clips

[kjtar]

Originally Posted by WHaaaaaa

I was trying to find the Best Exhaust for a decent price??? I was thinking about the Apexi GT-Spec but i dunno give me some opinions and some sound clips

Yeah, I just test drove a '89 GTU and it was too quiet. I'm the kind of guy who likes to listen to the engine and exhaust when I drive, the radio is when I'm on the Interstate. So, any recommendations out there for a good loud (but solid sounding) exhaust system for a '89 GTU?

Thanks,
Tom

[banditkiller]

Remove the cats and get a header from racing beat..... get some custom bent pipe into 2 canister type mufflers...... It will sound pretty nice after that... And with the removal of the cats. and the restrictive stock manifold... you will feel a signifigant power gain. Hope this helps.Ohh.... And the hell with paying 650$ for something I can have done just as well and sounds just as nice for under 250$. just my

[Jims5543]

Definatly go Racing Beat for the Header and Presilancer. (Happy Dana?) As far as cat-back thats up to you. I have no clue what to recomend for a N/A aplication. There are so many out there.

I have seen the Racing Beat and Pacesetter headers side by side and the RB is by far a better header. The bends are less severe and the build quality is much betterer. Racing Beat used to send a block off plate for your ACV. I dont know if they still do that or if you have to buy it. Dont forget a gasket from the engine to the header.

[Jims5543]

What Year RX-7 are we talking about as well. Is it a 86-88 or a 89-92?? With the 86-88 your 6 ports are activated by exhaust backpressure so you dont want too free of a flowing exhaust. If its 89-92 the 6 ports are controlled by the air pump. If you have a 89-92 make sure you leave your air pump connected.

[MyGTR34]

Exhaust wise, id go with the Blitz nurspec all the way. It sounds really good. Very deep and gutteral, and loud, and you car definately here the turbos when they kick in. Along with a Greddy blow off valve, it sounds quite nice. Horsepower wise, it helps A LOT.

[dayna240sx]

Originally Posted by MyGTR34

Exhaust wise, id go with the Blitz nurspec all the way. It sounds really good. Very deep and gutteral, and loud, and you car definately here the turbos when they kick in. Along with a Greddy blow off valve, it sounds quite nice. Horsepower wise, it helps A LOT.

I wouldnt go with that exhaust. It is way too ricey. You can here the turbos when they kick in? Big deal, I hear my turbo spool at idle.

[kjtar]

Originally Posted by MyGTR34

Exhaust wise, id go with the Blitz nurspec all the way. It sounds really good. Very deep and gutteral, and loud, and you car definately here the turbos when they kick in. Along with a Greddy blow off valve, it sounds quite nice. Horsepower wise, it helps A LOT.

There were some questions about the year and type of car, so;
1989 RX7 GTU normally aspirated. I live in a non-compliance area, but don't really want to take the cats off. So, with those parameters, what would you guys recommend? Data point, I had a '94 Miata R version, took off the stock exhaust and added a Borla cat back and was very pleased with that sound, but I know that here we're talking rotary versus internal combustion "regular" type engine. "I'm listening." Also, if given your choice of cars to buy and use as a "special" or "weekend" car, would you get (for around $8k) a 1989 Porsche 944S2 or the 1989 Mazda RX7? Both cars have a little over 100k miles on them.

Thanks, everyone.
Tom

[Entreri33]

I always liked the dual N1's with a offroad pipe or the bonez cat

[MyGTR34]

heh, sorry, i just thought the exhaust was pretty cool. but i guess being the one i hear the most, it kinda gre on me. But as for N/A, the best sounding has been the dual Apexi N1 exhaust system. The units we have sold to our customers have been great products, seen the most power, and best feedback as to noise, simply cuz they come with silencers, so if ya like it loud, throw em away, but if not, you can jus slide em right in.

[J-Rat]

If you like a quieter tone, then go Racing Beat. If you want to shake the windows, go N-1.

Jarrett

[MazdaB1300]

Originally Posted by Jims5543

What Year RX-7 are we talking about as well. Is it a 86-88 or a 89-92?? With the 86-88 your 6 ports are activated by exhaust backpressure so you dont want too free of a flowing exhaust. If its 89-92 the 6 ports are controlled by the air pump. If you have a 89-92 make sure you leave your air pump connected.

There are plenty of other ways to run your 6 ports so don't let those keep you from getting a free flowing exhaust. Personally, i run electronically activated six ports.

[Jims5543]

I am by no means a N/A expert. I have never heard of actuating the 6 ports electronically. How does that work and is it expensive to set up??

[J-Rat]

There are several ways to actuate 6-ports electronically. And its very cheap. All you need is a pressure source (air pump, etc), a solenoid, and a signal thats rpm activated.

Of course this is for S4 cars only.

Jarrett

[kjtar]

Can someone please explain to a newbie what the designations S4 and S5 signify? Series? What years are we talking about for what abbreviations?
FAQ material?
Thanks,
Tom