right now my car is completely stock except for a flowmaster series 80, for xmas im getting hooker comp headers, taking the cat off, running straight pipe no cat to the flowmasters, k&n open element, a tran-go shift kit and a k&n breather...what kinda numbers will i be making? and also in the next month or so im gonna get a 3.73 posi rear if i can find one outta a wrecked camaro..what you think ill be pulling after that also?

 

Low 15's high 14's if you can get some traction and tune with the AFPR. Run lean and you won't be any faster so I hope you adjust the fuel pressure accordingly.

 

high 14's should be enough to run if not beat a 5.0 stang correct?

 

Assuming its a stock 5.0, yes.

 

what could i do for cheap after that, that would make me beat a 5.0? thats my main goal right now since im tired of all the goons kicking my *** in there old mustangs.

 

I'll say it before anyone else does.


Nitrous.

 

Swap the stock peanut cam for a used LT1 cam. It will pull much stronger and higher into the RPM's. If you've got high mileage replace the springs while you're at it. I don't think you'll hit the 14's with just the mod's you mentioned. Good luck, Lon.

 

yeah you're all on crack.
By the time your done blowing your cash on the rear end upgrade you will not see much 1/4 mile improvement, since your engine output is the same. Yes you will get up to speed a little quicker, but that stock 305 just has no *****. Also Long tube Headers on that stock motor are useless. Wait to you see how much they cost! (A good set like Hookers) then add ceramic coating. yes the engine will breathe better, but the heads, intake and cam are still STOCK (ie crap) Imagine having a fire hose hooked up to a kitchen sink faucet . not much water flowing thru that sink facuet compared to the size of the hose right? so the Fire hose is not being used to it's potential.

A stock 305 with headers and 3.73 gears, Good for low 16s high 15s

You want to BEAT a 5.0 stang better get a power adder. N20 is cheap and effective. a 135 shot will get you in the mid 14s.

If you plan on making more power then yeah a 3.73 is a great ratio same with long tube headers. BUT they are a waste of money right now on a stock setup.

It's your car and good luck with it, but I'm telling you from experience, spend money on upgrades wisely.

The faster you want to go the more expensive it gets.

I have a built small block 350 with Projection 900CFM, 1 3/4" Hooker Super Comp Headers, Mufflex 4" exhuast, bullet proof trans., and 3.73 10 bolt rear soon upgrading to a 9" ford with 3.70s.
Not to mention subframe connectors, lift bars, drag shocks/struts, Be Cool 4 row Radiator, etc. etc. = Shitload of money, It took 7 years to build but I did the major mods all at once (motor, headers etc). All this to run low 12s - high 11s.

I still have my N20 system too, although I haven't sprayed it since I got rid of my 305. that same 135 shot that used to get me into the 14s should help me get low 11s high 10s now. Time to get the bottle filled and try it again!!

Best of luck.




The faster you want to go the more expensive it gets.

 

i didnt get longtube headers i got a set of shorties since i dont need very much flow since my heads are crap...whats a stock 5.0 run in the 1/4 i think i remember reading around the high 14s or 15s...thats stock tho...you dont think the mods i have now plus rear end, new intake, and cam wont get me into at least mid 14's?

 

Honestly ,, NO

Not without a power adder.

I have been there already.

An engine can only flow so much air/fuel. again think about the fire hose analogy...

you have 2 options to increase flow.

Increase the size of the engine....
Force more air/fuel into the engine... ( Blower, Turbo, Nitrous)

Cam, Heads, manifold all help increase flow but you are limited to the dispacement of the engine. ie how much air/fuel in can it suck in and burn.

An old stag has about 55 horse on you (stock), more torque, and weighs less.

Plus the ford 5.0 was designed to make power and was improved upon every year. GM needed a 5.7 just to keep pace with it since the 5.0 was dog.

 

Year Model 0-60 1/4 Mile E.T.
1978 Pontiac Firebird Trans Am 6.50 15.30
1980 Pontiac Firebird Turbo Trans Am 9.80 N/A
1983 Pontiac Firebird Trans Am 9.20 17.00
1984 Pontiac Firebird Trans Am HO 7.90 16.10
1987 Pontiac Firebird Trans Am GTA 7.10 15.50
1988 Pontiac Firebird Trans Am GTA 7.40 15.90
1989 Pontiac 20th Anniv. Trans Am 5.10 14.20 (TURBO TA)
1990 Pontiac Formula Firehawk 4.90 13.40
1991 Pontiac Firebird Formula (5.7L) 6.50 14.80
1991 Pontiac Trans Am Conv. 7.00 15.40
1993 Pontiac Firebird Firehawk 4.90 13.50
1993 Pontiac Firebird Formula 6.10 14.70
1993 Pontiac Firebird Trans Am 6.30 14.80
1994 Pontiac Firebird Formula 5.80 14.10
1995 Pontiac Firebird Formula 6.70 15.10
1995 Pontiac Firebird Trans Am 5.60 14.00
1995 Pontiac SLP Firehawk 5.30 13.90
1996 Pontiac Firebird Formula 5.80 14.30

Hope this Helps

 

Year Model 0-60 1/4 Mile E.T.
1982 Ford Mustang GT 8.00 N/A
1984 Ford Mustang SVO 7.90 15.80
1985 Ford Mustang GT 7.20 15.90
1987 Ford Mustang GT 6.70 15.30
1988 Ford Mustang GT 6.40 15.00
1989 Ford Taurus SHO 6.60 15.20
1990 Ford Mustang LX 5.0 6.40 14.90
1991 Ford Mustang GT 7.30 15.60
1991 Ford Taurus SHO 7.70 16.20
1992 Ford Mustang LX 5.0 6.20 14.80
1992 Ford Taurus SHO 7.50 15.40
1993 Ford Mustang Cobra 5.90 14.50
1993 Ford Mustang GT(auto) 8.00 16.10
1994 Ford Mustang Cobra 6.90 15.30
1994 Ford Mustang GT 6.70 15.10
1995 Ford Mustang Cobra R 5.20 13.80
1995 Ford Taurus SHO 7.70 15.80
1996 Ford Mustang Cobra 5.50 14.00

 

I know I posted a couple of 1/4 mile times and hp ratings and got plenty of flames,,,,but the numbers you posted are very wrong.

#1- I'll have to give even Mustang a little more credit here 15.6+ come on they'll do better than that.
#2- The LT1 powerd cars run better than a 14.8 on any day unless the track is icy.
#3- The TTA is faster than 14.20

These numbers are off the 1/4 time's site aren't they? I seen most of the same errors there too. Not trying to flame here but eveyone here should know an LT1 doesn't run a 14.8

 

Nope, don't think so, do your homework... I did. Funny how people always argue the 1/4 times but never question the 0-60.

Hard to believe when you seen the numbers staring at you eh? These #'s are from MY my data base and taken from magazine test reports such as Road and Track... not every car is set up for drag racing.


I raced a late model TA last fall. (LT1 car) he ran a 16.838 @ 96.72 Obviously major traction problems since his 60' was 2.9 seconds.

 

i agree those numbers are slow, stock 5.0s are better then 15.6 and a LT1 WILL do better then 14.8, your data is wrong

 

Yeah for example the '88 Mustang tested went 15.00

You should really quit zeroing in on one particular year.

Get back with me when you come back down to reality 15s, & 14s are respectable times for STOCK street cars.



Sorry but I wouldn't drive a 11 second car every day.

 

Quit being so **** these numbers are NOT absolutes, but can be used as a bench mark to gauge performance. It's easy to bitch and moan "wahh, that number is wrong" but I don't see anyone else backing up what they say with any hard data. Flame at your hearts content, I will not repsond to hearsay.


Most of you have wet dreams about breaking into the 13s with 305s and stock junk TBIs. Hate to burst your bubbles but it ain't gonna happen. You'll figure it out. Few if any are flying with 305s it makes no sence when for the same money you can build a 350 that will make more power.

I gaurantee that not of the guys that are fast on this BBS is using a 305. 3rd gen TBI cars are not known for their 1/4 mile performance.

 

Hey FRM, I was running pretty low 15's with headers, 3.73s & positraction, and a few minor mods on my '88 LO3.

 

Man those aren't even bench marks there bottom of the barrel. They shold be titled the : "Times if you tow a trailer in the 1/4" 14.8 is an embarrasment to the LT1 and I hate to say this but 15.8 is a embarrasment for Mustangs. I got yelled at for being off on times and hp for the 1993 Cobra but this is rediculous. Those #'s are very incorrect no matter where there from, I know I did a post similar but on Mustang Hp ratings. Seriously the last thing i'm trying to do here is flame but come on.



P.S. FRMULA- Everyone already knows TBI cars suck stock but if I made mine run 14.9 without lifting a valve cover someone else can make theirs faster!!! 350's are great but some people can't just yank there engine out and throw one in.

 

Getting back to the question asked as been said before you will need to do some changes.

You can read from my sig what's been done and the most noticeable performance came from the head and intake change.

If I were to only do two things the best bang for the buck would be there. You should also keep in mind any future upgrades in C.I. and buy parts that you could apply to a 350. The heads I used were off a 350 and were not made for a 305 but they made a huge diff.

 

yeah and 14.9 is something to brag about... NOT

 

I can tell you that my friend with a 91 RS with edelbrock headders, 3" cat, 3" cat-back, and a hypertech chip ran 15.5 through the stock single snorkle air cleaner at Norwalk with the stock peg-leg 2.73.

A bone stock L03 with full exhaust is not running low 16's unless it hasnt been tuned up in 200,000 miles.

Most of the stock stangs I see (5-speed) run 14.5 to 14.70 depending on the driver. My friend dan got his bone stock 88 GT to go 14.4, but he powershifts the hell outa it. You'll need a rear with 3.42s or higher, full exhaust, open element, some suspension stuff, cam (stock LT1: .440/.460 low 200's duration) for $30, and possibly heads to go that fast NA.

Its safe, from what I've seen, to run a 100-125 shot on these motors, but I'd rather do it NA, call me old fashioned

Good luck with whatever you do though! Keep us informed.

 

Did anyone else think I was bragging? I just simply stated my LO3 ran 14.9 without lifting a valve cover for an LO3 thats pretty damn impresive though, oops there I go braging again.

 

Guys, I know from experience, I raced my dad at Great Lakes Dragway this summer. I have a 91' Firebird LO3, dad has an 89' 5.0 LX, both with automatics. My car has headers, 3" catback, shiftkit and open element. Dads has headers, catback, 3.55's, shift kit, and Cobra intake. I ran 15.66 he ran 14.29. Was never a race from the begining. Point being, if you wanna keep up to 5.0's in a 305 Firebird, you gotta go heads, intake and cam. Otherwise I don't think it would happen (without N2O). Just my opinion, I learned the hard way, but good luck!!

 

Yeah have 2 Stangs push em from behind instead of ONE

Bring your flying 14.9 305 junk out to union grove next spring for a RSD event. After I land on your decklid I'll teach how to make some REAL power.

oops there I GO bragging...AGAIN!!

 

i know i should just yank the 305 and put in a 350 but i cant and noone seems to understand that...im 17 years old....work at burger king...that should say it all righ there...i didnt get the car to race id just like something i could run a decent 14 in...im not looking to go to the drag strip on the weekend....if i can get the money id like to get a zz4 but i doubt itll happen....

 

hey man I'm with ya on the 305 thing, I would like to do it just cause every time I see a Mustang and Camaro/Firebird guy go at it the Mustang guys says why do you need 5.7 Litres to run even??? I think it's a good arguement, I would like to see the 305 run with the Stangs, and I wish you luck. Try finding a used LT-1 cam, do some intake work, ultimate TBI mods and bolt on a good header/cat/catback exhaust to start. You wont even recognize the car anymore. Later when money alows get a limited slip rear end with lower gears (3.42 or 3.73) By then you should be able to run solid 14's and hang in with evil stangs. Good luck!

 

why is it that the formula to run 13's with a 305 tbi on the cheap has been posted up here a million times and everyone still seems to ignore it?
the long and short of it is this:
1. posi w/3.73 gears
2. box your stock control arms
3. get control arm relocator brackets
4. drop the drivers side endlink off the front sway car when you are at the track
5. a 14x3 flat base air cleaner
6. ultimate tbi mods (350 injectors suggested), adjustable fuel pressure regulator, and ALDL convertor lock up from tech articles
7. edelbrock performer tbi intake
8. stock LT1 cam and upgraded valve springs
9. headers, y-pipe, high flow or cat eliminator, and cat back(1 5/8 primary headers w/3inch collector, 2 3inch into 1 3inch y-pipe, 3inch inlet/outlet car, 3inch cat back)
10. do a minor auto diet(remove spare and jack, run with half a tank of gas or less, clean all your junk out of the car, give the car a bath)
11. keep the car tuned up
12. have someone from the board do a chip for you.

that is a simple and easy to follow plan that will net huge results.
theere is even more you can do with a little more money, things like some heads(world products torquer 305's would be great), a bigger diet, and sticky tires(nothing over 26inches tall) would net even more gains. this combo should be good for a 60ft time in the mid to low 1.9's and 1/4 miles in the 13.8's @ about 98mph.

later
tim