I bought a '95 Z28 a few weeks ago. Black, 6speed, t-tops, leather, 130k miles. Anyway got to the tack and ran a best of 13.9 @ 99 out of 4 runs.
The mods done are
3.73 gears,
CAI
flowmaster muffler
is that okay time and trap speed?

Second question.
Can I hit high 12s with a 100 or 125 dry nitrous shot? or would it take more?

Here are a few pictures
www.pbase.com/demon440/junkhosting click on "junkhosting" and scroll all the way down for pictures



Thanks

 

About the right times for the mods. Trap does seem kinda low for that gearing though. What was your 60' time?

 

lol well actually I missed 4th gear on that run. I dont know how and I have never done it befor. ( had a '87 GT ) On another run I traped 100 with a 14.1.

on the 13.9 run I got a 2.0 sixty foot.
also this all on 245/50/16 street tires.

 

Times sound about right, 60' seems pretty decent considering the street tires and M6.

 

That's not bad for a ten year old 130,000 mile LT1 on street radials that could probably use a small tune up at the least...Realistically, all you have is a CAI & 3.73 gears...So driven properly, it should trap 100 to maybe 102 in good weather if running properly...Trust me when I say you aren't gaining anything with that Flowmaster muffler...Look at a full cat-back system or a cutout to open up a little power through your exhaust...

Mike

 

Hell My car runs 13.4@106 and my only mods are a cutout, K&n filter in the stock box, Full MSD(6al box, coil wires) LT4 KM, TB bypass. And my car has stock gears, with 156k miles. And a tip to not miss 4th( I did it for a bit) I now grap on the driver side of the stick, b/c before I would tend to pull the stick towards me instead of straight down. So now I wrap my hand on the other side of the shifter. Just my .02

 

I would be happy with that time. Best I could manage was a 14.1@100.5 with a blistering 2.35 60'. Mine has Flowmaster catback, K/N cai, lt4km, and TBB and is a M6. Guess I need to learn to drive the dang thing. How are you M6 guys launching? Seems like I either spin or bog. Can't seem to find a happy medium.

 

cool! I love this car. To the person who asked how to get a 2.0 sixty with a 6speed and street tires. I launched at about 2400rpms and just slowly let the clutch up while slowly giving it more gas. The first 2 runs i bogged real bad and the third I spun but the 4th was real good with the 2.0.

What kind of gains could i expect with a cutout and not missing 4th?

thanks

 

also what is the "LT4 KM" and what does it do?

 

wow thats pretty dang fast for what you have done. Think the MSD did anything for performance? And this was on street tires. I am guess they were b/c of your sig.

Thanks for the tip, i'll try that next time.

 

The LT4 KM or LT4 hot Cam is a real common cam swap, you can buy the whole Lt4 conversion from summit, i think its around $500 and you get cam r-rockers springs, retainers etc. The whole swap is good for bout 30-40HP

 

ah thanks.


Just ordered a summit cutout

 

The LT4 KM is a knock module, it is less sensitive than our stock LT1 modules. People with headers or roller rockers tend to get false knock with the added noise those parts add, and our sensitive LT1 KM will retard your timing because of that.

 

ohhh will my cutout cause that too?

 

How are you running a 13.4 with those few mods?