I am puttin a 305 HO in a 1984 firebird and was wonderin of it would be fast at all, it will be stock acept mabey some heads and a radical kam if it needs it.

 

What do you consider fast?

 

i have one in my 84 t/a, needs a tune up and even up here in colorado (about a sec slower e.t.'s) it is pretty dam quick, ive taken a new v6 stang for a walk in the park. Cam and heads are really supposed to wake these up.

 

hey 8 ball...305 is a good little motor...cant go wrong with a v-8 ya know...my bro still has an original L-69 in his 83 z..and back in the day even bone stock..that sucker would haul..throw some nice heads a cam,intake..exhaust yada yada yada..you know the drill..and it should be a good runnin motor...later bro and good luck

 

well my buddy ran a 13.9 consistent with his. it was an 84 Z28 gutted interior and a 5 speed. Oh yea a cam and stock heads with a posi and slicks, exhaust, blah blah blah

my 305 will hopefully be a 14.5 or so once i get it running right before my next motor will be put in~~~12s hopefully

steve

 

aren't they stock like low 16's high 15's?

 

nah, thats the LG4 motor. the L69 (305 HO) is rated 40hp over the LG4, probably good for low 15s if driven properly

 

40 hp?! your full of it! lg4 had 165 h.o has around 180

 

Actually you're only partially correct.

In 1982 the LG4 put out 145 hp
In 1983-84 it put out 150 hp
1985 the LG4 put out 5 more @ 155 hp
1986 was when it put out 165 hp
and the final year, 1987, the LG4 was rated at 170 hp

Every year the L69 existed in the 3rd generation F-body it put out 190 horsepower. So there's a difference from 20 - 45 horsepower.

Only the Monte Carlo SS L69's were ever rated at 180 hp.

Next time you post I suggest you be less confrontational or you'll find yourself being wrong more often than not.

 

They run around mid 15's.

 

i was comparing them for the year of my Camaro (1984) when the ratings were 150 for the LG4 and 190 for the L69. look whos full of it now

 

pretty sure the L-69 in the camaro had 190 tire shredding horsepower..lol..correct me if im wrong now..but good little motor thou..later fellas.

 

old fashioned mods put mine in about the high 13s

 

I would say mid 15s with it because that is what I get with the LB9 305 TPI on my car with 190 hp and according to the RPO code the LB9 is the HO with TPI.

 

83-85? L69s were carbed 305s

 

they do anywhere from low 15 to high 15, and the key thing to these 190hp/245lb cars running as good as lb9's is they more often than not came with stock 3.73's which work awesome with these motors. Im gonna run my l69 very soon (stock) and ill post times

 

A good cam, roller rockers and headers/exhaust should get you into the 14's.

All 305 HOs came with 5spd/3.73 in '83/'84.

You guys should look at the technical data more often, it has a lot of good info and I haven't seen it wrong yet.

 

ive seen a few auto 84' 305 HOs... i thought the 5speed restriction was only in 83'?

 

No use in trying to point that out, most people would rather speculate. Guess that's to be expected though on a "theoretical" board.

 

i know my stuff on l69's and have reviewed tech data numerous times, plus owning one never hurts, its just the l69 was only around for a few years and people tend to overlook it and they are not commonly encountered or studied over because not a lot of people have them, thus the speculation.

 

some L69's came with 3.73 gears, those probably go real decent, especially a well driven M5.

 

*sigh

 

what would a 89 lb9 with the g92 option run?......in a 5spd as well.....?......im thinking mid 14's.....also is a 1le car quicker then a normal iroc?........due to it being a little bit lighter?.......and how muh lighter is a 1le compared toa non 1le car?

 

an lb9 g92 is almost just an 85 iroc lb9, so with a 5 speed, it would do very low 15's stock, maybe a very high 14 with a very good driver, if a car weighs less, ofcourse its slightly quicker, i dont know the differences though

 

check my sig, thats basically stock and i will have alum driveshaft !ac !smog so i should be as light as a 1LE. the l98 1le i guess have ran 13.9@101mph. i bet a lb9 would run 14.2-14.4 in stock trim.

 

thx 90 iroc-zee.......i was thinking mid 14's.......cuzz jsut dirivng around in it theres noway its a 15 second car......

 

15.0 quarter stock