My 87 iroc has the following: 305, line bored .030 over, 10:1 compression, stock heads, ported w\ 1.94 int. and 1.60 exh. valves, comp cams xtreme energy roller cam (.495 int .502 exh.), torker II intake with holley 780cfm carb, underdrive pulleys, 3" edelbrock tes (has 3" y pipe), 3" cutt off, 3" flowmaster american thunder cat back exhaust, modded 700r4 w\ 2400 stall converter, B&M mega shifter, 4.10 gears, and 10"x26"dia. slicks. do any of you think i can get in the 12's? i have been told it cant be done with a 305. ill know for sure in April. Norwalk, here i come!!

 

Hot Rod put a 305 Z28 in the 12's back in the early 80's. I think you've got a shot at doing it too.

 

well read the new GM high tec and magnum TPI went 11s NA but i would loose the TPI intake and use a LT1 intake and a big shot of N2O

 

Several guys over on thirdgen.org running 12s on motor, and 11s on juice with 305s. Not sure of their level of modding though...

 

**** there is a guy running 12s with a 305 TBI on stock heads and cam with juice. Anything is possible!

btw, when you go to Norwalk let me know! Thats where I race all the time, too its great to have the best track in the world in your back yard!

 

I think you might just pull it off with that setup. Hell, even if you do make it, get a supercharger I think there's a moderator over at thirdgen.org that just has a supercharger on his daily driver and he's in the 11s.

 

I think there's a moderator over at thirdgen.org that just has a supercharger on his daily driver and he's in the 11s.

Technically, not yet. But it will happen soon. I'll be making the following changes. Actually, done one already:

1) Cogs replacing my 12-rib setup,
2) F1 replacing my D1SC, &
3) 3.23's replacing my 3.73's

 

I think this is about as modded as im gonna get on the 305. I also have an 89 rs with t-tops that im putting a 4 bolt main 350, ported vortec heads, big valves, and a procharger p-1sc centrifical supercharger (or the "air conditioner" for the mustang guys )with the carbuereted setup. Hopefully that will be in the 12's heh heh hehhhh......

 

Anything is possible. I've seen a 305 run 11.70s here, it was damn impressive.

 

Baddest305 (I think thats is name) runs an 11.6 with his 305 but hes running NO2

 

i was checking out baddest305's car... i pretty much have the same setup he does, except hes got a slightly smaller cam, 3.73's instead 4.10's, and a 3500 stall th-350, i have a 2400 stall 700r4. lets see, what else, i believe hes running 9.5:1 compression, not that much different than me, oh and the biggest diference, he has 305 torquer heads w\ 1.94 int, and 1.50 exh., i have the factory heads w\ 1.60 exh. I wonder how much difference that makes? Stock ported heads vs. 305 torquer heads? He claims a 13.0 sec pass n\a. The only thing im worried about is the factory suspension and factory axles (28 spline). I might have to get some LCA's, some relocation brackets, and some new mosers.