Killer_Junior

I am new to the forum and recently purchased a 2002 Z28 automatic. Most of my friends chastise me and say i should have purchased a 6-speed manual. Ok i get that but i obviously didnt. Question is, is there anything worth upgrading under the hood. I searched around and either my search-foo is weak or i dont even know where to start. My friends say its not even worth trying but i feel like they are just being bias. Any suggestions?

BC2002SS

your friends are not as smart as they think they are. autos were faster in the 1/4 than M6.

Killer_Junior

alright! now we are getting somewhere! I use this car mainly for daily driving. Mostly to get to work and back and around town when my wife is gone with the kid. So what would be the best route to take? Like i stated in my intro im not real savy under the hood so youll have to bear with me. Just kinda looking for options.

parkers Z28

A cold air intake is not very had to instal.. next you should go to the exhaust and do as much as you can afford. long tube headers , full exhaust , muffler better flowing cats. transmissions shift kit
the upgrades can add up fast this should get you started.

DANOZ28

1st make sure you upgrade your air lid & cat back (if stk). next if you have any wheel hop do sfc (sub frame connectors), lca's (lower control arms) for traction. headers & gears if in your budget. if you want to upgrade your auto A4, shift kit, servo, boost valve, aluminum pan, stall converter, cooler. after that if your bud can still smoke you heads n cam or bigger motor! cheers! ps a pro tune is very important. for racing a beast shell for your auto.

Killer_Junior

Thanks guys! You have all been really helpful. Im gonna start with a Cold air intake and work my way to the exhaust and shift kit. After that im gonna see what else i can afford. Once again thanks and ill post pics when i get start getting the ball rolling. I cant do much from Afghanistan

WhiteHawk

I nice torque coverter is about the biggest bang for the buck (after an aftermarket lid) you can get on an auto. I like the Yank SS3600 myself.

-Geoff

transamtom

Yup with the right tune you will still have great driveability

Plus you will eat stick cars for lunch at the track

Killer_Junior

So far on the buy list:

K & N Cold Air Intake
Superchip programmer
Flowmaster Cat back exhaust
Aftermarket rims (different thread)

Opinions?

transamtom

Get a lid its cheaper and flows better.

Forget the canned tune get a real tune a mail order tune would be 100x better.

Get a Magnaflow/Corsa/ Borla. forget the Chokemaster.

OE Wheels has a great selection at decent prices.

DANOZ28

i left out zpack clutches for racing A4's & if you rev over 5800 rpm you can run into valve float w stock valve springs! UPGRADE! (LS1 WEAKSPOT)

Jayson Banks

Hey guys I got a 2002 z28 auto I love it but idk what I should do to it it already has an aftermarket SLP exhaust I was thinkn shift kit and cold air intake but what else would be good for performance would I be able to Turbo it I kind of want a car I can drive on the street take to a show and run it down the track if necessary some one help

Injuneer

Which rear axle does your 2002 have? Could be either 2.73:1 (RPO = "GU2"); or 3.23:1 (GU5)? You can look at the service parts label (glove box or driver's door) to see which RPO code it has.

Makes a difference, because the 2.73 gears can hold you back.

Jayson Banks

it has gu2 I seen that on the door

Injuneer

Definitely need to replace the 2.73's with a higher numerical gearset. Options are 3.23, 3.42, and 3.73. Which ratio you go with will depend to some extent on what path you choose to higher HP, how much HP you are looking for, and your budget. Another consideration is a higher stall torque converter. Some mod's like a turbo, need to build RPM to produce torque. Ditto with an aggressive camshaft.

Key piece of info is your budget. I'm more knowledgeable regarding the LT1 engine. Hopefully if you can home in on a budget, the people who know the LS1 engine can give you more specific guidance.