Please look at my mods in my Sign and tell me if getting 19mpg on 85% hwy 15% city sounds right. I have new plugs and wires. Original O2 and no code. Before mods I was getting 25mpg. I also have the LT4 knock Module.

 

Why did you put 30s in? Doesn't look like you need em yet.

How many miles on that o2 sensor? it probably needs replacing.

I get about 14MPG so I would love to get 19

 

I agree.

 

is it tuned for 30#?

you have stg 2 heads and stock cam

 

Yeah I have Stage 2 & a stock cam. I was planning on getting a cam for it but ran out of $$$. It has 63K on it

 

I have #30's with the LT4 Hot cam and I'm getting about 19/20.

 

What mods do you have?

 

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1994 Z28/F-1 Black/ Silver Stripes
355 LT1 JE Forged Pistons, LT4 Hot Cam, Crane Racing Valve Springs, Comp Cams Roller Rockers, Ported Intake, Ported throttle body, Accel #30 Injectors, Accel adjustable Fuel Pressure Regulator, Accel 300+ Ignition, MSD 8mm wires, NGK TR6 plugs, Pace Setter Ceramic Coated Headers/Y-Pipe, K&N Cold Air, Custom PCM Tuning, TCI Street Fighter 4L60E, TSI Custom 2800 Stall, H&R 3" Springs, QA1 Racing front 12 way adjustables, 1LE Tranny Mount, Flow Master American Thunder cat back (single out), SS/ZR1 style 17x9/Kumho ecsta supra 275/40, Wolf Racing 4 point cage, Auto Meter 5" Tach and a Nitrous Express 150 shot (wet) Bottle heater/purge.
Best ET:
11.8 @ 118mph (sea level) Carlsbad Race Way, CA (Old Motor/slicks).
13.4 @110 mph PMI Race Way Peublo, CO (Old Motor/Street Tires 2.6 60 FT.)

 

Sounds right -

I'm surprised you upgraded the TB and heads befor the CAI - most folks start there.

You should really feel thr CAI when you put it in.

 

Im with him! The cai is usually the first thing people do.

 

True but I wanted to get a Ram Air hood & I just trade the Ram Air for CAI. Plus at the time I had a friend who did the work really cheap. So get it while you can. So I guess 15mpg in the city and 19 in the highway is about right.

 

Stage 2 porting W/ 1.6 RR, 58mm TB,
30lbs accel Injectors

More Air = more fuel.

 

If you haven't done any custom programming to account for the larger injectors that may be your problem.

FWIW, I can get 25mpg on the highway with 4.10's and the CC306. The car also runs 12.4x's.

 

Programming was done for the 30lb accel injectors.