just wanting to know where to start i am shooting for 12.50 to12.30's 1/4 mile .how close will 3.73 gears, cai, get me and what cam could i get and not have to change much or nothing to help . not run car yet but most everyone here knows about what a stock z28 will run.so give me some ideas keep in mind i have 2 kids and a wife lolalso car is a auto trans

 

You can figure about 10 hp for the CAI and that's worth maybe a tenth in the quarter. You'll see a big gain going to drag radials over the stock tires..maybe half a second. Stock these cars run about 13.5 to 13.7..these changes will have you in the low 13's.

Changing to a cam that doesn't require you to change anything else really isn't worth the effort. The idea behind changing the cam is to increase the air flowing into and out of the engine. If nothing else changes you won't see much change in flow....

 

You can start with simple boltons like cold air induction & catback. 3.73's & a mail order tune from Pcm4less at this point can be good also.

Then later on you can do the more expensive mods like, cam & heads from Lloyd Elliot or Advanced Inductions, 52mm throttle body, long tube headers, electric water pump, & a small stall convertor. Now you are ready for a dynotune.

A 150 shot of nitrous is always an option when combined with the above can give you high 10's or low 11's.


Good luck

 

Basic bolt-ons should get you there.

 

thanks guys for input having gears installed this week cai next week hope to pick up a little with these two mods also how do these cars do on say a 75 shot like i said just looking for mid to low 12 sec 1/4. ooh yea gear code is gu5 which i think is 3.23. and thanks again for all input very appreciated this is by far best forum i have been on.

 

You can easily spray a 125-shot.... that will knock more than 1 second off your 1/4-mile ET, and add about 10 MPH.

 

thanks was not sure what it could hold where should the gears and cold air get me. any guesses on times

 

ok guys got a small issue on road at low rpm i got a miss feels sluggish especially pulling a hill but if i get on it and get rpm's up it does fine any idea's

 

Ignition. You have a bad plug wire most likely.

 

ok thanks i will check that first it seems like it does it at a certain throttle position like 1/4 or so just very sluggish at that spot

 

If you changing the cam make sure you throw in some 1.6RRs while your there

 

ok guys forgot to mention also with the sluggish power it is slow to start or drags to start like battery is dead or timing off .battery is new so thats out

 

What does the dash volt meter read when trying to start the car? ..... at idle? .... while cruising at 2,000rpm? Have you inspected the wiring from the battery to the starter for corroded terminals, or corrosion damage to the wire strands?

 

ok all terminals are good pulled each wire off and cleaned them also charge is good 13 to 15.ok on my power issue could bad fuel filter be a problem it just boggs at low throttle or if i floor it from dead stop it hesitates.
again thaks you guys are great help

 

Check your fuel pressure with the engine under load. That will tell you if its a fuel problem.