yea thats right its a 19 second camaro. Damn guys watch out i might blow right bye you. Anyways i have a 1989 Rs convirtable camaro with a 305 TBI. I have a flowmaster exhaust with a performance cat, MSD inginion wires,and K&N airfilter. The camaro runs great. The tranny was replaced about 7 months ago and it runs strong (its a 700R4).I dont know why its goes so slow. The best time i ever got was a 19.5 on the 1/4.I know that a conv. is heavier the a regular one but damn is it that bad. What should i do. Thanks guys

mimi van beater
jason:lala:

 

EEWWW that is bad. My convertible ran close to 17 stock.

Are you running the factory air cleaner assembly with a K&N filter in it or an open element K&N?

Are you manually shifting that car through the 1/4 or allowing it to autoshift?

Check your base timing and make sure it was 0 and then set it to around 4 on low octane or 6-8 on premium gas.

How many miles are on that car? You may have some carbon buildup on the valves and might need to mist some water down the TBI to clean it up.

 

What do your 60 ft times look like? Do you spin, bog, or hook?

 

Any chance you can post the rest of the information on your slip? Or even scan the slip and post it here? What was your MPH? 60' time?

 

did u run with the convertable top on, or off. Also whats ure mph

 

ok here is my info:

first run second run
R/T 1.026 R/T .895

60 2.562 60 2.655

330 7.807 330 7.951

1/8 12.276 1/8 12.414

MPH 54.87 MPH 55.23

1000 16.159 1000 16.273

1/4 19.509 1/4 19.583

MPH 66.94 MPH 67.65

Every time i ran i manual shifted it, and the top was up. There is around 30,000 Miles on a rebuilt 305 ( thats a guess, its only 2 years old)Its has a open element K&N.And how do i check my base timing.Thanks for the help guys.

- jason:lala:

 

if its a stock tranny DONT shift it manually youll ruin your tranny not to mention hurt your times i used to shift manually and when i stopped i gained a full tenth just put it in D and go

 

something is dead wrong looks like you have teribble wheel spin i think the 4 banger fbody cars were faster than that!!!

 

Where in the world did you get that shifting manually will ruin your tranny? That's not true. I've been shifting my tranny manually for a LONG time (3 years) and no problems not to mention I gain 1mph and 2 tenths shifting myself vs leaving it in D. In this case I would let the tranny shift itself because it's a stock car, any change in powerband and you should be shifting it manually. My car also shifts a lot harder when it's done manually because it builds up more pressure to shift faster.
You definatly need to get at least 10 more mph in tuning. I have a feeling you've got some serious error codes or the timing is too far retarded the car doesn't pull at all.

 

i got that from GM HIGH PEFORMANCE

 

IT SAYS THAT WHEN YOU MANUALLY SHIFT THE TRANNY IT DOSENT BUILD AS MUCH LINE PRESSURE SO WHEN IT SHIFTS IT DONT HAVE ENOUGH LINE PRESSURE TO ENGAGE THE CLUTCHES PROPERLY AND IN THE LONG RUN YOU END UP BURNING THEM SO I DUNNO WHATS UP WITH YOUR TRANNY BUT MAYBE ITS LIVIN ON BORROWED TIME

 

I manually shift as well. If I let the car shift on its own I'm about 2 tenths slower.

I've been manually shifting this car for over 100 runs now and it runs just the same as it did 5 years ago. My tranny has outlived the stock differential gears for ***'s sake... that thing broke 3 years ago.

I've inspected my tranny twice now throughly in the last 2 years, no burnt bands, broken clutch packs or nothing. I've been running a vette servo for the last 10 years and this tranny has served me well.

What hasn't faired well are tranny mounts and my shifter console lol...

Happily running 15.4@90mph with a stock heads, stock headers, smog pump, emissions legal cat, stock intake, stock peanut cam, open differential/3.23, stock working A/C and stock TBI... 200000 miles... fun fun car...

 

oh ***... ure finishing the quarter at only 66, 67mph. Your 0-60 is prob around 17 seconds

 

There in lies the problem....don't trust everything you read.
BTW, my car has been running for 3 years now on a tranny that got a rebuild 30k miles ago but has 165k miles on it. It's the original tranny and for the past 2 years it's been running with 3.73s posi and a beefy stump pulling 380ft-lb 350. Every day I drive it I shift it manually. Either I downshift with it or I leave it in 2nd or what not. Not a problem

 

yea yea yea i know my camaro is slow but what can i change easly to help with this MINI VAN KILLER thanks - jason

 

first, get winaldl (its free!) and hook it up... You wont klnow what the compuiter is thinking without it. Thatll give you a good idea of whats going wrong. Even unmodded you should be better than that.

 

make sure all ure plugs are in good, wires are in the right fireing order.

 

something is wrongs...a 90hp 4 cyclinder mustang is faster than that. Pull all the plugs and check them..may want to do a compression test to and see whats going on because those times are terrible. you should pull high 16s stock at around 83mph...not 66mph

Oh and until you fix it you better watch out for those rice burners...even stock ones.

 

There's something seriously wrong with either your engine or how you run the 1/4 mile.

A 67 mph trap speed is something you should have at the end of the 1/8 mile mark. I'm pulling 71 mph by the 1/8 mark.

He says it runs great, almost anyone can pickup that somethings wrong if the car is missing on a cylinder or 2.

First let's take this in steps guys and wait for more info before jumping all over him with what to do...

When running the 1/4 mile are you putting the pedal to the floor?

If so at what rpm do you shift at for each gear?

Are you only using 1st, 2nd, 3rd gear?

What is the timing on your car set at?

Is the idle smooth, no hopping on the tach and no popping cracking sounds from the engine?

Is your air cleaner clean?

Is your cat clogged?

What color are your spark plugs? Tan/brown, white, or black?

Is the stream from your injectors conical?

give us more information about your engine so we can help you...

 

He doesn't know how to set his timing, there isn't much that can be done you help him.

Dude, you gotta learn about your car, start buying car magazines and read every article, that should give you a jumpstart.

My 91 RS runs 15.5@90

Virgin stock, it ran 15.7@80-something.

There osn't one thing we can say to fix your car, you gotta develop the background to ask the right questions.

 

There's no need to yell.

And that's only when you downshift manually while your foot is off the gas. I don't know many people who do that while they're dragracing.

 

My 2.8 ran a 17.4 with a horrendous launch.

 

That is pretty good times for a 2.8 85IROC it would probably give a stock lo3 a decent run. I never ran my 305 at the track but i had to be turning 15s. It was a quick car to me and kept up with my dads 95 GT auto until 3rd gear then he would slightly pull. Give me 1 more week and we will see how that 302 power house does against and engine with 48 more cubes

 

That's with 160k miles on the clock. I had a nasty exhaust leak, and I didn't even bother pulling the stereo and the mound of junk in the back seat out of the car. My launch was so bad that I turned a 2.5 second 60' and still ripped off that time. I only managed to get 1 run in that night, so I never got to work on my launches. I bogged it real bad off the line because I launched at too low of an RPM. I was determined to get back to the track and get it into the 16s in bone-stock condition, but I never got around to it. All I needed to do was knock .2 off my 60' and I could have gotten into the 16s. Between a better launch, a repaired exhaust and the weight reduction, 16s would have been a given.

 

i dont see how a 2.8 can run 16s....thats what the lo3 runs...how is that???!

 

Well, mine did a 17.4 with the laundry list of excuses I listed above. I know it could do high 16s without mods. I'm not exactly at sea level up here either.

It's not my fault that tbi sucks. :sillylol:

 

:sillylol: :sillylol: :sillylol: :sillylol:

 

<--- killed an LS1 firebird convert on 315 south the other night. I passed him going 75 in the left lane. I watched his front end rise and I stepped on it. We were going 110 when I shut down and had moved ~4 car lengths on him and he had the first move. Must have been an auto .
TBI sucks . Tell that to the guy driving the LS1, then explain it to the countless LT1's that started ****.
Hehehe. But "it's just a TBI powered RS camaro"

 

Since when did a firebird get a LS1?

 

<---- killed an LS1 Formula at the track with my 86 TA.

 

WoW that is terrible!

 

Since 1998.

You wanna hear something that'll make you feel really bad?

One T&T night my friend and I were sittin' in the bleachers checkin out the babes and what pulls up to the tree but a damn school bus. And this wasn't that wheelie monster that you see on TV. It was a plain old looking school bus.

The lights dropped down the tree and BOOM..... there goes the green light. We're laughing our asses off the entire run...... THEN IT HAPPENED!!!!!!

We both shut up, stared at the time on the display board, then turned, looked at each other and said "DAMN!!!!!!!!!!!!"

That bus ran a 20.38 ET!!!!!!

A damn school bus!!!!!

At least you know you've got him by ALMOST 1 second!!!!! :lala: :lala: :lala: :lala:

AJ

 

a FIREBIRD? um, no formula's and T/A's got LS1's...I was being a smart *** towards JPrevost, just messing with him

 

OoOoo Thats gonna start som chit on this board. I liked the drivability of TBI but I decided to go carb on my 350. I didnt want to spend ~300 on a holley TBI and 300$ on a chip burning equipement to find out that it wasnt going to work very well.

 

Jason, you forgot to mention your times were run as Las Vegas Motor Speedway, which is at 2500' altitude or something like that. Those times are uncorrected.

Save up some money and bring your car to my dad. He'll get you set up with a nice 350 engine.

 

Jason, trying to get back on subject here...

Can you answer Slade1's questions? I know it might sound trivial but we've all had the problem where the floor matt has bunched up under the pedal and made it so you cant go WOT. Have a friend press your throttle down and look at the tbi to make sure its opening all the way.

To check timing you need to disconnect the brown weather pack wire that's right by the strut housing in your engine. Then get a timing light and connect it to the #1 wire. Your timing marks are behind your water pump, on top of the harmonic balancer. Start the car and point the gun at the marks. You might have to clean them off before you start so you can see what the heck you're looking at.

 

I sounds to me like a bad clogged converter. It is one thing that can rob your HP without giving any other symtoms.

John

 

yes i can beat a school bus finally good news sorry that it took me so long to write back , ok here are the answers....

1. ok when i ran the 1/4 i had my foot all the way to the floor
2. i always shift when it hits red line (around 45 hundred)
3. i use 1st ,2nd , and 3rd
4.i have no idea how to set a timing so i dont know what the timing is set at
5. idle is smooth, it bearly moves
6. the K&N is clean
7.I just got the cat about 2 years ago, it should be clean, its a high performance cat
8.the sparks are black( well they have black covers over then, but the wires are blue [MSD])
9. what is stream from your injectors conical?

my machanic said that the computer thinks its a V6. I dont know if it matters but my cat is a high performance cat with 3inch pipes going to the flowmaster. thanks for the help again guys.-

jason

:lala:

 

Ok, from the 2 tbi's I've driven, a friend's and mine, it likes being shifted at 5000-5500 rpm, depending on mods that affect airflow ie headers, exhaust, intake etc.

Try a 5000 rpm shift and see how that works for you.

Next, engine can sound ok, but timing can still be off. Check timing with a timing gun at a good mechanic if possible, or buy a el cheapo gun and check the tech articles for checking timing, or post and we'll try and direct you.

I'm asking about hte condition of your spark plugs, ie you have to take them off to see the condition they're in.

If you take off your air cleaner and look at the injectors on top, observe the fuel being sprayed into the engine. The spray should be perfectly conical in shape and barely any fuel should pool at idle.

There's a serious lack of power in your car at the moment from the mph you are running and their are a lot of things that can do it. Still need more info as to why your running such low numbers. A stock TBI should at least be in the 80's on mph...

 

I agree with slade on checking the spray pattern....check those puppies for drips or a non conical spray pattern....If you cant see it a trick a buddy of mine taught me is to shine a timing gun/light on the spray in the dark and they will be clear as day to check for a bad spray.

As for the shifting at 5000/5500, Like I said to slade on sunday...no way for me, especially with the stock cam/heads intake, regardless he kicked my but on sunday at the track and every other time I have been out with him!

 

ok so you want me to take my air cleaner box off and start my car so that i can see the fuel spray and see if its good. some times i use thats stuff that cleans the carberater ( i have know idea how to spell that)you know you put it into your fuel. Ok tell me if thats what i do and ill do it thanks guys- jason:lala:

 

i just have hooker 3 inch catback, hypertech chip, and open element, my freshly rebuilt transmission likes to shift at 5000 rpm's at full throttle.

 

You all are speaking chinese to this guy. Save your breath.

 

When was the last time the car had a tuneup? You should be able to do that yourself and maybe take it somewhere to have a compression test done.

 

thanks guys ill get a tune up and test it again and let you all know how it goes , thanks for everything later on - jason:lala:

 

hey remember Pablo at one time you didnt know how to do all of this........... :sillylol: