http://www.racingbeat.com/FRmazda2.htm
Racing beat has a claim that a 59 horsepower increase with there complete turbo 2 exhaust system on my s4 t2. Now i know that rotaries react really well to fresh air, but is the increase really that big? Has anyone had any expirience with this? if so how big was the performance boost? Thanks. Sergei The Saint.


P.S. Also does anyone know of a good place to buy performance bushings for an s4 t2? Thanks

 

Yes but if thats all you add you will blow your motor.

 

I've heard this too...

What would I need to add if I wanted to safely install exhaust/intake?

 

You'll blow motor if you boost past 10 psi on a S5 or hit fuel cut on the S4. You'll also get louder note too. i would really get a FCD with that. and maybe a bigger fuel pump. Leave the stock intake. Fuel is probably the most overlooked item. Funny thing is that without it, you can't make power.

 

Whats FCD? and wait a minute, so along with the exhaust i need to get fuel cut off defender and FCD?

 

FCD=Fuel cut defender

 

Sergei you don't know what FCD man i'm disapointed :P

 

Hrm, should I be alright for a while if I rewire the stock fuel pump? I do plan on getting a walbro.

 

Get a boost gauge and make sure you arent going past 8 or 9psi.

 

59 HP would have also been acheived on a stock FC which was in PERFECT running condition (ie: excellent compression, new spark plugs, newish condition exhaust, etc)

If you put this system on the average used FC which is running 100% properly in stock form, I would estimate that you can safely get a 30-40 rwhp increase.

 

We just put it on a friends car. He also went with GSL-SE injectors and Walbro pump at the time and FCD. Runs awesome and is now boosting 10psi in all gears, I think it would be hard to dispute RB's claim.

 

I had an '87 TII, I now have a totally stock '89. The '87 had a 3 inch downpipe, main cat replacement pipe, and some decent mufflers. Otherwise, the '87 was stock. The 'ol butt dyno says that the '87 was faster than the '89. I'd say the exhaust gave a good 30-40 hp. That's compared to a car that still has the stock main and pre-cats.

Todd

 

I had an '87 TII, I now have a totally stock '89. The '87 had a 3 inch downpipe, main cat replacement pipe, and some decent mufflers. Otherwise, the '87 was stock. The 'ol butt dyno says that the '87 was faster than the '89. I'd say the exhaust gave a good 30-40 hp. That's compared to a car that still has the stock main and pre-cats. The '87 had a totally stock intake and it never hit fuel cut. It was a great running car.

Todd

 

Thanks all

 

what are yall talking about, i boost past 10 all the time, my motor is fine....? am i missing something..mods in the signiture..

 

an averrage used FC would gain more from the exhuast then a brand new one....

also does it say "peak hp" ?? can't remember. it probably adds 59hp at like 4000rpm or something

 

Of course you do, and you have a FCD, so you have nothing to worry about.

Its only if you don't have an FCD that it is a problem.

 

This little punk (rotal), just wont shut up will u, talking about u disappointed. I'm disappointed! You dont know what DEPOMTA stands for, do u? man.........


P.S. also look up AIAD
You Daddy.

 

LOL.... FCD does NOT make it safe to boost higher... it just allows you too. what is making it ok for him to boost past 10 is his 720cc secondarys.

 

ok, noob. relax. but can someone explain to me the whole prim and sec injectors thing real quick :\

 

LOL. You know what I mean :P

 

How do you figure that? The average used FC (in stock trim) would have partially clogged catalytic convertors (even if it's slightly, not noticeable) and lower compression on engine than it should be, a turbocharger that has seals that are starting to wear out (or worn out), probably injectors that could used cleaned, etc.
No way in hell the average used FC makes more power than a brand new (but broken in) FC.

 

exactly.... hence more of a gain when adding the exhuast...

just because it adding 59 doesn't mean its 182 + 59. it's whatever they had before they put it on + 59.