Currently i have a CAI, pacesetter head 4-1, and a magna-flow 2.5 cat-back exhaust system. I plan on getting rid of the pacesetter down pipe and making a custom one, and customizing the header to get rid of the ball-joint and adding a flex joint. I'm also planning on either a high flow or cat-delete, and adding a wide-band sensor into the down pipe.

With these upgrades would i require a tune? I know it would be best but i'm still saving up for hptuners.

I was also thinking about a bored throttle body and larger injectors, which i know would require a tune.

So what should i do, wait till i get the tuner or go ahead and do the exhaust?

do the exhaust first, the tune wouldn't help enough for it to be worth it

exhaust injectors then tune immediately thereafter.

you will be happy.

if you take out the cat you'll need a tune to turn the cel off, but with bolt on's a tunes not necessary. and you dont need the wideband unless you're gonna tune.


1994 Saturn SL2 Home Coming Edition: backup car
2002 Chevy Cavalier LS Sport Coupe: In a Junk Yard
1995 Mazda Miata R-package Class=STR
Sponsored by: Kronos Performance

WPI Class of '12 Mechanical Engineering
WPI SAE Risk and Sustainability Management Officer

A tune will help just about any slightly modified car. It just depends if the money is worth it to you.

I'm getting the tuner its just a matter of when. These are all supporting mods for a project that i am saving up for and planning on doing this summer.

Supporting mods for a project and they include a header. Looks like someone is getting blown (or juiced I guess). Wait until your mods are done to tune, unless you're tuning it yourself.


1994 Saturn SL2 Home Coming Edition: backup car
2002 Chevy Cavalier LS Sport Coupe: In a Junk Yard
1995 Mazda Miata R-package Class=STR
Sponsored by: Kronos Performance

WPI Class of '12 Mechanical Engineering
WPI SAE Risk and Sustainability Management Officer

I would tune the stock engine if I could... I'm sure you could get an improvement..


- Your not-so-local, untrained, uncertified, backyard mechanic. But my @!#$ runs

who you guys kidding... a tune will help a bone stock car.





If it takes forever.... I will die trying. Underdog Racing