I went to the track for the first time this year with my current setup as follows.

Stock 305 TPI engine with Jet Chip
160 Thermostat
B&M stage 2 shiftkit
headmen headers with2 1/2 in pipe w/ flowmaster 3 chamber
MSD superconductor wires 8.5 mm
corvette 02 sensor

everything else is completely stock

first run:
rt - .237
60 - 2.482
330 - 6.706
1/8 - 10.160
mph - 71.42
1000 - 13.126
1/4 - 15.621
mph - 90.90

second run:
rt - .217
60 - 2.185
330 - 6.301
1/8 - 9.766
mph - 71.06
1000 - 12.705
1/4 - 15.262
mph - 90.35

third run:
rt - .234
60 - 2.120
330 - 6.153
1/8 - 9.562
mph - 72.13
1000 - 12.505
1/4 - 14.985
mph - 91.37

forth run:
rt - .204
60 - 2.117
330 - 6.153
1/8 - 9.566
mph - 72.00
1000 - 12.516
1/4 - 15.001
mph - 91.25

the temps ranged from 91 for the first run to 86 on the last run
the humidity ranged from 60 on the first run to 80 on the last run
average barometer 29

also, my posi didnt work for me.

I have videos if someone can host them for me. thanks.

any other ppls times with their similar setups would be nice. thanks.

i would appreciate anyone giving me some ideas as to what i could do differently.

 

Good times, but not all that consistant.

 

i know, i only got the hang of it for the last two runs... which were pretty consistant

 

thats pretty good times for a 305 tpi with an automatic tranny.

what gears do you have? you should either have 2.73's or 3.42's, from the good times and mph i would think u have the 3.42's.


https://www.thirdgen.org/newdesign/tech/techdb.shtml

 

i thought that 86 irocs came with either 3.23's or 3.45's? i have no clue...anyone?

 

Mine came with 3.23's factory. Look in your center console on the underside of the lid - it should either be a GU2 or a GU5 code.

Here's a timeslip from my car pretty much stock, mods were: 1LE Alum. DS, K&N's, gutted air box, 13* base timing, gutted cat.

60'... 2.02
330'... 6.244
1/8... 9.745
MPH... 69.54
1000'... 12.785
1/4... 15.355
MPH... 87.76

HTH

 

my code is gu5 and my timing is still at 6 degrees...any ideas as to what i could do next. i was thinking cam and new aluminum heads with roller rockers

 

what kind of roller rockers could i put onto my current stock heads? what would work and make more power?

 

I know what you should do next. Get some more displacement!

 

Well said, I have the exact same setup except mine is a Trans Am. I dumbly rebuilt my 305 instead of just yankin it out and throwin a 350 in. Oh well, live and learn. My times were high 16's and low 17's. Mainly due to the fact that my exhaust has holes and my intake box has a hole as well.

 

Well said, I have the exact same setup except mine is a Trans Am. I dumbly rebuilt my 305 instead of just yankin it out and throwin a 350 in. Oh well, live and learn. My times were high 16's and low 17's. Mainly due to the fact that my exhaust has holes and my intake box has a hole as well.