Magnaflow catback exhaust, good for Turbo?
 

Hello, i'm soon to be upgrading to a Bell Series 1 Turbo kit with Garrett GT2554R, this car will never see more than 220 horsepower (I want reliability and drivability, not open hoods), should I go ahead and sell my Magnaflow 2.25 inch catback exhaust with hi-flow cat, or should I keep it and just delete the catalytic converter. (In Alabama, our cops don't care about that stuff)

I would think that running just resonator and muffler would surely open up the exhaust...

no cat FTW

you should be OK with that exhaust, but a 2.25 is pretty restrictive, going with a bigger pipe, like 3" will help your spool a lot and wont restrict as much up top...its your call though, its cheaper to keep what you have

A 2.5" should see a noticeable gains even...but you could try it w/ no cat...then just take the whole exhaust off and see what less would be :)

You'd want at least 2.5inches.

It's certainly better than stock. I'd tackle other things first.

Such as???

Like an intercooler upgrade for the kit.

Is not the stock intercooler big enough? I don't want anything that's too massive that it lags the throttle or makes me remove A/C

Oops, sorry. Didnt see you going for the Begi S1 kit, it has an intercooler.

You could spend the money on a wideband, or a high pressure fuel pump since you will probably be using the AFPR.

you said it yourself, with your turbo you aren't looking to make the most amount of HP available. Upgrading the exhaust while it may net small HP/TQ gains, wouldn't really be the first of your concern. It's certainly better than a stock exhaust and should be sufficient for now. I doubt you'd notice a big difference one over the other with that turbo, it certainly couldn't spool much faster ;)

well i do agree with brainy on the priority list...
maybe you should look into a better clutch, maybe brake upgrade and diff upgrade unless you already have a 7" rear...
what year is your car?
look into watermeth as well, its a very nice insurance policy

for that power level I'd keep the 2.25" exhaust for now. you'll need a clutch, timing control (don't think the S1 includes Bipes), and injectors. Once you up those things you should be able to hit that power level without any problem on the exhaust you have now. Once you reach your power level change the exhaust to help spool and increase sound.

Meth for 200whp!? Magana is that u?

New high performance clutch, already got that ;) Did I forget to mention I was running a JRSC Supercharger

lol, no its not magna
i do think that water meth is great though, easy to make more power by increasing timing while staying on the safe side...

i still have no idea what the newb drives though

*Sigh* another misguided soul. at least you are going turbo now.

I'd do a 3" exhaust. It's going to improve spool and response and get you power.

Begi S1 + MSPNP + injectors + wideband + clutch/exhaust/etc = a reliable, bulletproof 220whp

Pm me if you decide to sell your SC kit

Do it once.. do it right.. do it 3". One day you'll catch the power bug and want more boost/bigger turbo and you'll be glad you did it. Werd to your moms.

what good is a 3" on his 2554R if all he gets is 10hp up north, 100rpm extra spool and major booost creepage. If he had a 2560 or 2860 I'd say hands down do it.

I know I'm all about 3", but I think money could be spent elsewhere.

I'm another in the do it once crowd. 3in for turbo or don't bother. Regardless of power goals or turbo size, it will spool faster and make power goals easier to reach. Simple as taht.

Hey 02BlazinMiata. I just got your message, I am holding this supercharger until friday, I got a man from Houston that has agreed to 1,550 shipped. I got other people interested, but if he backs down, i'll let you know friday. Thanks!

P.S. My supercharger kit has less than 15k miles includes FM Voodoo card, TDR 62.5mm pulley, TDR header blanket, MSD ignition box, and a custom Tensioner designed after moss 2nd generation tensioner, but a one piece unit. :)

Now of course, I love Flyin Miata. If Flyin Miata had a grocery store, I would shop there just to get the little flyin Miata shopping bag, if Flyin Miata sold Dog Food, I would buy their Turbodog Brand, if Flyin Miata had condoms, I would buy there GT28 series size condoms. Heck, if Flyin Miata had toilet paper, I would wipe my a## with their toilet paper.

Seriously, now I am considering the Flyin Miata 2.5 inch Duel exhaust without a catalytic converter, remember I do live in Alabama, our cops don't care about that stuff. ;) I don't know, but i've seem some reports done and it appears that cfm flow more than double when the catalytic converter is removed, would this more than offset the disadvantage of a 2.5 inch exhaust?

Second, everyone seems to talk about power, power, and more power. To be honest, I was happy with my 7psi Jackson Racing Supercharger, it had a predictable 150-160 horsepower, but I could not justify spending a 1,000 dollars more on a TDR intercooler. Why does supercharging necessarily mean i'm a wayward soul, I loved my JRSC supercharger and that's why I am so hesitant to just go and buy some big big turbo, because I place power predictability and drivability as my number one most important aspect. I have driven 289 horsepower Miata's and IDK it's almost like its too much power. Most people claim that the GT2554r turbo responds like a supercharger and has a headroom of 220-240 horsepower, I will never go over 220 horsepower..

There is one thing that i'll miss with the supercharger, and that is the sound of what can best be described as a jet turbine engine. Does all turbos sound like blowing air through a straw? And BTW, blowoff valves, obnoxious...

them's fight'n words where i come from bubba.

What year model is your car? Please keep me informed I am very interested; Thank You.

Please pm me if he changes his mind, im very interested thank you.

Pretty much. At least for now its money in his pocket by not upgrading, then later on if he is going for more power it wont be that much harder to throw in a 3 inch turbo back.

He 02BlazingNB, the buyer has backed down, I'll take 1500 dollars plus shipping if you are interested. It is for a 1994-1997, but heck it should be compatible with a NB IDK. Second I have an entire exhaust assembly with less than 7000 miles on it. OBX-4-2-1 header, Magnaflow hi-flow cat and Magnaflow catback exhaust, it really opens it up and it's a perfect match to your supercharger. Thanks!

P.S 1,800 dollars and i'll ship it all to you.

ever heard of PMs?!

I tried that, said I had to have 15 post, before I could private message. :(