Max

I'd be interested in knowing what your 305 thirdgens are running in the 1/4 mile. I would be especially interested in knowing what you run without boost or spray, but feel free to post those times as well.

As you can see by my signature, my best (G-Tech) 1/4 mile so far is:

14.88 at 98.4 MPH.

I think a little more carb tunning, some better valve springs, an LS1 aluminum driveshaft, and some 1.6:1 full roller rockers arms could get me into the low 14s or maybee into the high 13s with the 305 in my 3,400 Lb. convertible.

What are you guy running in the 1/4 mile? What kind of setups and components are you using?

Dewey316

I went 13.4 @ 106, last year (really crappy 2.2 60'). With the new heads I put on, and some Drag Radials, I should eb solidly in the 12's.

Mods, Stock 305 TBI, UltraDyne Cam, Full Exaust, and a 100 shot.

Cali Z

my best was a 15.4 @ 88.4 mph @ Sacramento Raceway, Ca about sea level.

Best bone stock time was 15.8 @ 86 mph
Current best was with headers, muffler, a/c delete. This was done with a non posi 3.23 and a locking tcc before the traps (gay).

89IrocZ350TPI

So your the one who all the TBI guys brag about. Very good times for an l03

Dewey316

I don't know what the bragging is about. I did like anyone else building cars does. Then spent a lot of time tuning it so it ran well. The lesson is, that throughing parts at the car doesn't get you any where. You have to plan everything out, and pay attention to the details. There are plenty of TBI guys going faster than I am, I guess for some reason mine just gets a lot of attention. :shrugs:

Lo-tec

Not running a 305 anymore, but I got 14.10@98 with a 2.0X 60' out of my 84 305 H.O. 11 or 12 years ago. 218/218 on 110 lunati cam, performer intake, hooker shorties, CC Q-jet, 3" exhaust, stock 3.73 rear with posi, junkyard 88 GTA trans & converter. T-top car with no weight reduction except for flaking paint. This was at the end of it's life, with 150K on it and maybe 40psi of oil pressure going down the track.

brutalform

I had run a 13.99@101, one time only with my original 305 S/D engine in my Formula. It was at Island Dragway, in good air. Normally it ran in the 14.20s.

MaNiAk86

iTrader: (2)

dead stock with a 2.0 60' i ran a 15.400 with my LB9 auto iroc.

mw66nova

iTrader: (13)

my n/a daily driven 305 went 13.03@103mph on a 1.750 60'. click on the link in my sig to find out how i did it.

muggsyjack

Mine is a cheap bracket car.

89305formula

iTrader: (5)

i ran a 15.57 at 95mph in my lb9 formula with headers high flow cat, cat back and a cam , but that was with no traction through 2nd gear then i missed 4th gear but i just bought a set af drag radials and hoping to run mid 14s this friday nite

eric17422001

The car- 88 hardtop Iroc, AC, power windows. LB9 5 speed, 3.08 posi. 188,000 miles. Worn out front struts, some used BFG drag radials.
Mods- in the process of fixing an intake gasket leak, I gasket matched the base and plenum, siamesed the runners, and took the "wall" out of the plenum where the throttle body bolts on. Cut out baffles in the airbox, fresh cheap Purolator air filters.
Stock exhaust manifolds, air pump and the whole works. Cat repalced with straight pipe, "Thunderbolt" brand chambered (Flowmaster knock off) muffler in the stock location. Getting rid of the stock cat and muffler knocked two and a half tenths off the 1/8 mile time.

Ran a 15.11 at a MPH I can't recall in 90* temps last September with a headwind. Has run a 9.53 1/8 mile (my timeslips are not in front of me and my wife needs me to do something right now he hehe) in 45* temps.

I have scored some never installed Hooker 2460 shortys on Ebay for $66 and am having them ceramic coated for another $100, will install them with Hooker's Y pipe and get rid of the airpump while I am at it. Will run it again in March at the GA F body shootout.

mw66nova

iTrader: (13)

yep, and i was with eric in september. that headwind was worth .3 on my car so there is no tellin' what his car would have run!

hey eric, you gonna let me try to bang some gears again in march?

eric17422001

MW-As they say in the midwest where I'm from, "you bet"

I hope I can get the headers back and on in time. I don't think the coater (friend of mine) got them until last Saturday.

chikn305

iTrader: (2)

My 305 went 13.20s on motor and 11.8s on a 160 shot. Mods in sig

PHAT89TA

best time i could get was a 16.02 @84mph with a 3.67 60'. Steve (87tpi) now owns the car and he believes it is faster than his old ride (which went 15.2)

mw66nova

iTrader: (13)

did you send it to AM91camaro (is that his name?) down in florida? the guy with the badass 3.1 that would show most 305 guys his taillights?

you'll have to run down with me again how to do it, launch and all you know, i don't want to break anything!

MaNiAk86

iTrader: (2)

- How do u get a 3.67 60'?

87tpi

iTrader: (5)

That's what I'd like to know.I now own the car and there is no way it's a 16 sec car.I have done some more suspension mods and am adding a posi 3.42 so it should do a lot better,with the mods in the sig,any estimates?

PHAT89TA

i mean 2.67. Steve how does it ride with the bilstein hd's

87tpi

iTrader: (5)

Much more responsive and tight.

V6camaroman

i dont have any slips for mine yet, but its built very similar to a few members motors on here, so i hope atleast mid 13's. i would eventually like to fine tune it to low 13's n/a and spray a 150 shot into mid 12's

Mad-Mic

13.6 @ 103 mph

CFI 305 82 Z

had a mild 350 cam (which is BIG for a 305) 3500 stall, manual shift kit, 3.42 richmond gears, ported lower intake, ported stock heads, alot more timing, few more pounds of fuel pressure, on cheater slicks and some other things done. can't remember this was 15 years ago.

still got the car but it's been sitting for the last 10 years and now waiting for the resurrection got all the parts for her. 388 stroker, t-56, 9bolt w/ 373's and some other good stuff

DrummerDad

Holy crap, I feel slow. My 91 'bird only went 16.80 at 82. But in my defense, it is dead stock. Down to the factory type plugs, and 2.73 gears. Even the factory tires. I am also at Bristol. I have about $1000 worth of mods in the basement, waiting on spring to get installed. A complete exhaust, headers to muffler, and a few other goodies. I am hoping for a 15.99, but am expecting a 16.30. Maybe next year, I can get the 15, with a set of gears.

92CamaroLS1

16.8 and 17.1 both at around 79 mph. 2.3 60' dead hooking. Mods:flowmaster muffler.

New goal...11's

DrummerDad

Good. Now I dont feel so bad. I did nothing to the car for the track. Even filled it up with a full tank of push water. But I was spinning bad(2.40s 60' times) and even spinning into 2nd gear. And it was 100% stock. I have a complete exhaust, now, 1-5/8 headers(shorties), into a 3" y-pipe, and 3" pipe all the way to a 40 series flowmaster muffler w/ single tailpipe,and highflow cat. I am hoping to run a little better this year.

BADDEST305

back when i was running a 305 i got a 13.1 on motor and 11.47 on a 150 shot

eric17422001

Update- Installed the headers and Hooker's Y pipe for them. Weather was much more favorable for the spring shootout- low 60* temps and overcast.

Ran a 14.73@93.86 first pass, did not hook well with a 2.23 60'
Next pass- little better, 14.70@94.12 with a 2.18 60'
Then I uncapped the 3" cutout I put after the Y pipe where the cat would normally be-
I went 14.47@95.07 mph with a 2.16 60' time! I let the car cool nearly 2 hours while I spectated during bracket rounds.

I came back and did a 14.34@95.55 mph with a sweet 2.08 60' .

I knew the car would pick up with headers and it did, but the combo of headers and the open cutout woke it up. I noticed that when it had stock manifolds, cat and muffler it peaked at about 4800 on the butt dyno. Removing the cat and installing a lower restriction muffler raised that, and gave me three tenths at the 1/8 mile track. But with the headers and the cutout open it pulls past 5000 now. And does it sound sweet.

TunedPort 335

Times in my sig are over a year old..


Looking foward to running a 12.9-13.1 in a couple of weeks. Still stock LB9 unported heads, 19lb injectors, small cam and untouched TPI in a full weight pig. i cant wait

1MeanZ

iTrader: (9)

Chickn305, mw66nova, and TunedPort335, DANG YOU ALL IN YOUR AUTOMATICS AND GOOD 60FT TIMES!!!!!!

Ahhhh, who am I complaining to, I junked my 2800 stall Vig and 700R4 in favor of a TKO600, unfortunately my 60ft times are in the junk as well. Anyway with a geriatric 2.2 60ft I run 13.7 @ 100.5. My car would go 13.40s at least if I could get it out of the hole. Soon as the track opens I am back to practice...

TunedPort335, put some heads and intake base on that thing already! I want to see an NA "305" go mid 12s!

jethawk

Car's a 1991 Formula...T-5...3.42's...Dual Cat Option ...LB9.... Bone Stock Form With 185,000 km

60 foot - 2.215
1/8 - 9.605 @ 73.5mph
1/4 - 14.92 @ 92.39mph


added a few small mods since then and looking for some better 60-foots and mid 14's this year!

mw66nova

iTrader: (13)

well, get some m/t et street radials and some lca relocation brackets, and you to can have traction as we do!

and tunedport's car is no more a 305 is than a 383 is a 350...but impressive non-the-less and i wanted to build a 334 stroker very badly because of what he's done...and still plan to build one, maybe to put into a malibu station wagon or something(i have this idea for a malibu station wagon that i've wanted to build since i was 16...)

1MeanZ

iTrader: (9)

mw66nova, the time listed was with drag radials but no relocation brackets, I have them welded on now ready for my next strip outing. The problem is I think my car is geared too tall. When I did a good burnout and dumped the clutch from 5000 (yup you read that right 5000rpm) the car about did a wheelie and then fell on its face, it just does not have the torque or the super low gears to throw the car off the line (i have 3.23s). So I tried less burnout and dumping the clutch, still bogged. Then I tried slipping the clutch at about 3000, slipped it out too slow, and my ET sucked. On my final pass I did a weak burnout and slid the clutch out hard, which the car responded well to except is spun the DRs through 1st gear. So basically I need to figure out how to slip the clutch out the best way and make sure the slicks are warm enough. Or if the car had 4.10s I could probably dump the clutch and it would haul off the line. This is a summary of my first 4 runs ever with the 5speed and my first experience with drag radials. I hope to 60ft better this spring.

mw66nova

iTrader: (13)

the lca rb's will make a big improvement, i promise. i could definitely see you benefitting from some 3.73 gears though...4.10s are alot of gear, especially for a tpi motor.

TunedPort 335

I like the wagon idea

I figured i'd post up anyways since my car has neither boost or spray. Judging by my "butt dyno" my car feels a few tenths faster than when i ran my 13.4 but we will wait and see Plus, i can shift at near WOT now ... hmmm

mw66nova

iTrader: (13)

may want to get that fixed...i can shift at WOT without issues.


and the wagon would ride on a set of 17x9.5 and 17x11 zr1's with 315's out back and an air ride suspension...334 stroker and some type of fuel injection...and be stout enough to pull my thirdgen on an open trailer.

TunedPort 335

Its just the governor, i haven't tried running through the gears WOT this year yet...but it seems to be alot better so far. I really have no time anymore

KWIK84

iTrader: (5)

Crappy times first time out on this motor. 15.1 @88. In a 3100lbs. car with me in it. Has intake, carb, headers, stall, 3.73, and cam .472 228 @.050. Maybe someone can give me some ideas. The last one i built was near identical and ran WAY better.

mw66nova

iTrader: (13)

where did you set the timing at?

KWIK84

iTrader: (5)

initial was 10 deg, with a trick kit in the dist. for mechanical advance, I am thinking that the weights were sticking, I'm pulling it apart this weekend to check it out, also going to go through the carb real quick.

1MeanZ

iTrader: (9)

wow back from the dead.

Well first off your trap speed really sucks the big one man. You have something robbing tons of power from you, either carb, ignition, or something is wrong in the motor. Keep us posted.

KWIK84

iTrader: (5)

going back on the 5th and 6th of may i'll keep you updated though.

TTOP350

iTrader: (8)

1.89 60ft 13.90 @ 104
stock 305 TPI (put in my 350 car just to c what it would do)
slp cold air
ajustable fuel reg set to 50 psi
ZZ2 crate cam
slp headers and cat back
stock auto w/slp shift kit.. trans was slipping bad
stock rear gears 3.27
half bald GSC tires Yes a 1.89 60ft on these tires!
stock 350 chip
unpluged knock sensor
base timing @ 14-16 deg

1MeanZ

iTrader: (9)

Are you sure that is not a typo? TPI cars never trap very well for the ET they are capable of. you cut a respectable 60ft time, ran a respectable 13.90, but at 104mph? that does not make much sense. most TPI cars runnin 13.90 trap 97-99 mph.

Pony Killer

the old motor in my Z went 14.608@92.5 it was a wore out 305 with a2400 stall converter, 3.42 gears, Qjet, and 26x9.50x15. had a summit 204/214 cam, stock heads with a valve job. and some pocket porting.

My 88 formula is all stock save a flowmaster, and a K&N. T-5, 3.45 gears. That's gone 14.66 @ 93. the tranny's a bit shot and had to granny shift it. i just cruise around in that, i don't race it anymore. start snooring after the 1/8 mile

3rdgenZ

iTrader: (1)

when my z was new with a 305 tpi it went 14.74@97.
bone stock

tpivette89

my old 84' Z28 with the LG4/auto (3.23 gears w peg leg rear) went 16.0 at 85mph with a 2.3 60ft 100% stock. after a catback, open element, flexfan, bumped timing, and a stat it went 15.6 at 87mph w a 2.2 60ft

now i have a 87' IROC with the LB9/manual (3.45 gears) that i ran a 15.1 at 93mph w a 2.3 60ft. the car is 100% original w 110k on the clock, and i checked the timing the next day and found it was only at 2* BTDC. surely with the timing set right, a tune, and some better 60fts ive got a mid 14 sec stock LB9

i also have a 82' Firebird S/E with the LG4/manual combo, but im not taking that down to the track until i get it fixed up a bit

91RockS

I recently ran a 14.835 sec, 2.030 sec 60’ with a mostly stock 1991 RS 305 on bad rubber, 3.73 gears, and TBI (prom tuning by me). I'll soon be installing a set of ported 081 heads, better intake, and bigger cam. I'm looking at a 215/218 dur, .490/.490 lift, 112 LSA full roller cam. With that and some additional suspension mods, hope to be in 13's territory.

LB9GTA

iTrader: (1)

Times in the sig.

Without the n20, I went 9.2 in the 1/8th.

Mcdamit

drop some 93 in the tank and run it with 12-15* timing... you should fair alot better.. car also doesn't feel sluggish at all..trust me 6* is still a slush box