9chevy2

How fast can a normal stock 92 Camaro RS 305 tbi without the speed limiter go (top speed).

crytical point

what rear and transmission?

I know that when I hit the speed limit on my 92 T-5 3.08 I have plenty to go and another gear. But I think it will top out in the 130's maybe 140 tops but that is because of the low HP and the resistance at that speed.

9chevy2

It'll prolly get to 130-140 slower then the cars today then, huh?

1MeanZ

iTrader: (9)

It will go as fast as the speed rating on your tires. Then you'll have a high speed blowout and crash.

kkingsrulee

Definitely, but it depends on what you mean by "the cars today", that's too ambiguous, are you talking about a honda accord? Most cars today are designed with mileage above most other aspects of the car, cars that don't produce much bottom end torque but have top end horse power, for example, I drive my girlfriend's '98 volvo all the time that I don't drive my car (I've gotten a speeding ticket and a failure to stop in that ****) anyway if you floor it from a stop you can feel it hesitate below 3000 rpm, but once it hits around 3000 you really feel it start to kick in, and it really pulls up to that redline when it shifts, but compared to my car, which from a stop you really feel it pull from idle all the way up to around 3500 or 4000 rpm to where it's just useless reving, yeah, you're going faster but you really lose that sort of "umph" you get when you take off. BTW sorry if I'm either boring you or merely telling you something you already know.

9chevy2

Well i see what you mean and no your not boring any information is good information in my book gotta question for you, What is your opinion into converting a 305 tbi to a 305 tpi or 305 to a 350 tpi? And the reason i ask is because i was looking at this crate engine CHEVY 350-325 HP. I got a complete tuned port injection system and with that i can just add it to the 305 tbi or the 350, what do yall think ?

Gladstoneiroc

iTrader: (1)

Probably, around 125 - 130, but with either 2.73 or 3.08 gears it will take a long time and lot of open road.

I think it is not worth the time or energy to switch TPI from TBI.

ownor

iTrader: (5)

i did 120mph with my 89 formula once, there was still some power & rpm left with the 2.73 gears, but not sure.. i didn't take it any further because it was already damn loud in there with the leaking t-tops and i don't trust these cooper tires (though VR speed rating)

Kevman

I recently watched TopGear on youtube when they speed tested the Bugatti Veyron. I believe James May said it takes 200 horsepower to make it to 140 MPH, but it takes 940 Horsepower to Make it passed 200 MPH.. Something to do with wind resistance..

ownor

iTrader: (5)

the birds had a pretty good aerodynamic coefficient for the 80s afair, dunno about the camaros. anyway, i guess it would take a lot more if you try taking a brick-like van up to those speeds

thomas1976

I did 128 stock with tbichip, after that it would go in 3gear at around 4400rpm to get out of steam an switch back in 4th and so on. Problem was 119 up speed increases wery slowly requiring lots of street.

With full exhaust tbichip and cold air intake 137.5, i could actually keep it in 4th then gently ad trottle, it would have gone faster but traffic dident allow it.

This was with 2.73 gears. The noise this cars make past 105 is scary, its not only the t-tops because I dit around 128 with a coupe and it wasent much quiter in there.

kkingsrulee

Nah, I wouldn't add a 305's tbi to a 350, they sell specific 350 tbi units aftermarket, i'm pretty sure holley does, the reason being the 305 tbi unit is not made to feed a 350 sufficiently (imho). I'm not sure about tpi though, i don't know much about tpi but i'd assume the same goes for tpi, the 305 fed system won't flow as much as it should for a 350.

kkingsrulee

I don't think that's EXACTLY correct, NASCAR's cars run around 800 HP and could make it 200+ mph without a restrictor plate at talladega.

studdmstr

The actual gm throttle body is the same for a 305 and a 350 it's the injectors that are different. The GM throttle body that is different is the one from the 454. I believe Holly is the only one that makes an aftermarket throttle and the rest of the companies take a GM throttle body and bore it to open up the bores some. A 305/350 throttle body will be able to support the air/fuel requirements up to a certain hp (I think it was like 280hp or 300hp. There have been lots of discussion on this so you'll need to do a search). After that you'll need to move up to one of the bigger bore throttle bodies. With the engine you're looking at you'll need either the Holly throttle body, GM 454 throttle body, or a aftermarket bored throttle body with bigger injectors and increased fuel pressure. You'll also need computer tuning.

Rayvan

NASCAR front end is *very* low to the ground compared to a Veyron, so that doesn't allow much (if any) air underneath the car. Since they're built in a wind-tunnel, they don't need as much HP to get to 200 mph.

While very aerodynamic, a racing stock-car would never make it up a driveway or over a speed bump if you drove it around in a city, like the Veyron can.

crytical point

There is a significant weight difference and the veyron is street legal and full trim and goes like 250mph. It really comes down to wind resistance at those speeds and the firebird has the camaro beat at that.

I hit the speed limiter on my car rather quick on my road I like to test on and if it had a better flowing top end I could have made the best out of it. If you look at top speed data collected on the Fiero between Aero and non and there is a huge difference just because of the nose.

kkingsrulee

I was under the impression that "james" was referring to cars in general and basic physics when he said it takes 200 hp to get a car above 140 and 940 hp to get one above 200 mph.

Not specifically the veron or w/e it's called.

Stephen

iTrader: (12)

My old 92 RS 305 TBI/T5/3.08 with the speed limiter disabled, stock PROM........Topped out near 130 on a LONG interstate straightaway in the middle of the night. Doubt it could have even hit 135.

91interceptorZ

iTrader: (3)

my old 305 tbi camaro did abot 115 maxed in 5th......4.10 gears..

kkingsrulee

Mine has stock 3.08, I've hit like 105, but I get too scared, everything starts rattling and stuff, and i start to pass other cars too quickly, i think i hit get quite a bit faster, i'm only revving at like 3500 rpm

Kevman

I heard too, that at a certain speed the nose of a 3rd gen collapses.. Something to do with the urethane..

SLP IROC-Z

iTrader: (1)

had my 91 305tpi 5 speed car to 4300rpms in od (.63 ratio) car has 3.42s in the rear and stock 245 50 16s, it was moving and did not take long, it hit a wall at that point tho.

Gladstoneiroc

iTrader: (1)

Have any proof to the limits of the 1 13/16" bore throttle body?

I'm know FAST355 came up with 330hp+ before they became a limitation.

crytical point

Wouldn't doubt it, if it does it isnt the only GM car to do it.

CaliChevyLover

91interceptorZ

iTrader: (3)

get rid of the steel driveline and go to aluminum.....it's probably the driveshaft shaking the car......all of mine have done same thing too. My current car shook from about 70mph on up....hitting 100-110 I thought it was going to rattle car apart....replaced line with aluminum, and hit 145mph smoothly, I didn't really wanna go any faster, and that wasn't in a tbi car (was in current car), but just some info.....
sorry to get off topic slightly..

neomene

I just tested my 92 z28 350 tpi 700r4 camaro on the highway with an 8 mph wind from the east. i was going north and used my gps to track my speed.
My car topped out at 150.5 mph and up until my speedo hit registered 145 it seemed acurate.

My car is all stock except for headers and 3" exhaust, all smog equipment removed, chipped, and running 46psi fuel pressure.

just thought i would post my results!

Milliardoj

Thats bout where my 350 tbi topped at. Takes a pretty good amount of running room to get there tho.

Stephen

iTrader: (12)

Do you have your tranny built to be able to run WOT in Overdrive? Or did you hit 150 in Drive?

V6F1R3BRD

150?! o.O

Zepher

iTrader: (1)

My 88 Formula which was bone stock had the ability to shift to OD at WOT.
http://www.youtube.com/watch?v=BZIeHa-LwaE

also, the fastest stock bodied 3rd gen firebird went 307mph.

ZONES89RS

iTrader: (2)

Damn...that music is kinda.....

snowboardgod869

i have a 1991 rs camaro tbi and an automatic transmission i got my car to some where around 125 not exactly sure spedo only goes to 110 but i still had a 4th of the pedal left when i hit the governor and it dropped my rpms to make my car slow down

Stephen

iTrader: (12)

Easy fix......
Speed limiter Bypass

ThreeOhFive

my friend's 91 rs hit 135mph. the motor was stock except for a hotchip. and that car was a 2.73 auto. i've heard of 305tbi cars getting close to 150 with exhaust.

92-RS-305-TBI

Realistically the camaro was not built to go as fast as we like it to. Issues with tire ratings, aerodynamics, materials, modifications, electronics, mechanics, weight, and built with too small of an engine 95% of the time. To be perfectly honest I love my 92 RS and I know I am going to do a lot to her, but realistically GM purposefully built these cars leaps and bounds behind another car they manufactured whose name I won't mention out of self respect...as to almost force you into buying it if you like fancy things like digital dash...hardcore ABS, TCS, Launch control, the ability to go over 150 without wondering if you should of made a last will and testament. At least we have little brother on roids to save the day in the form of the 5th gen, which may look like a thrown away bastard baby born in a black and white "everything looks the same these days if it has 4 tires", but at least we can say..."Yeah, there's finally a camaro 'Built' to do what we all aspire to do with ours daily."

And of course we have more pride in our cars than most owners of any other generation or model of car out there. Being part of thirdgen.org is an honor...the resourcefulness of members..the concern for others issues... the head nod or wave as you pass another one...the stares you always get from middle aged men as you pull up in one of these and the chuckle you give yourself aloud as you squeal first. It is a whole other world and I like nothing more than just riding around in her and sucking gas down like an Ethiopian with a chicken wing. My 57 year old father is helping me with all of the tasks "although i don't let him touch the important stuff" and it has been great bonding to have with him. He says the car makes him feel like a teenager again. If I leave my car cherry forever I honestly will not care at all...And anyone who still doesn't feel like a school girl at a backstreet boys concert from time to time when they are behind the wheel of their 3rd gen...well maybe your rides over...maybe having an American legend and owning a car most have wrapped around trees isn't enough to make you proud...I know I'm biased because I loved mine since i was 6 years old and some of you will never understand or experience that feeling...but to be honest if 110 is not fast enough for you...why don't you hand the keys over to someone who asks you about the car and let it go to someone who cares. Sure I am young and like my speed but a 3rd gen is different...and if you can make yours last another 10 years guess what...you will actually be in a rare club.

I came in here wanting to do everything I can to my camaro and after reading the inconsiderate garbage that comes out of some of you. I think I will stay cherry...restore her completely and be done. I don't know how many of you have been approached by an owner of the car who's name shall not be spoken who has like an '07 and paid over $70k for it, And say "Yeah she's a 25th anniversary" And when the guy says "all original?" you just nod...But I had that guy with the 70k car wiping the sweat off of his brow...and forget speed limiters and insane modifications. I can say that if you want to push the car to extremes i hope you are a professional drag racer. Other than that please rethink the mod and remember that these cars have 20 year old technology, and that no matter who you are you can lose everything in an instant. I wrecked on a bike doing 70 and now my military career is over, but I'm glad i have my life...and that I finally became a man in my stepfathers eyes so that he just handed the keys over one day. I tell you what, earning a marines respect is not easy...and going army didn't help. I, unlike many of you, cannot replace the camaro I have or what it means to me...No third gen will ever mean anything to me but this one, so I'm saving it.

You guys are special members of a family and we are all brothers here, so I want you to all know it's all love and respect, not condescension. I appreciate greatly the work the moderators and senior members have done to make this a truly unique place for us third gen owners from all walks of life...and remember the next time you see one of our bodies in the junkyard...remember it could have been one of us you read or commented to that was in that seat, now in a box.

Stevo

iTrader: (45)

I had my 92 Z28 with L98 up around 140-145 when i was young and stupid. Here on I395 into D.C... I own a 02 Z06 now which i hit 142 on the road course and 121 on the drag strip. Sure i don't have some fun in a little while but got to keep it smart and safe...i think i have had this car up around 100 once on an empty road at night. It's just not worth the risk to do stupid **** on the streets.

I know the Z06 will do 165-170 but i don't need to find that out unless i have this car out at the texas mile or something like that.

Oh and another thing, third gens are just flat out scary anything over 100. They shake, they rattle, the wind, and make some funny noises.

ThirdGenFire93

You have more or less completely changed my mindset. I originally wanted to keep my car stock, then somebody convinced me to do modifications, and now (because of reading your post) I've decided that the engine is going to stay STOCK, exhaust mods only, the car is fast enough. (For the most part).

I love my car to death, in 20 years I hope to be at shows, seeing peoples faces when they look at the car in restored cherry condition (I'm actually getting my car all redone and painted in a few weeks, when it warms up outside here in CALI).

I guess having a fast car is one thing... But having a fast ENOUGH original car is another.

Good post.

ThirdGenFire93

Wasn't trying to change the subject there.. Just responding to "92-RS-305-TBI."

Stephen

iTrader: (12)

7 month old thread & it gets revived by a book being written for it!

StevenB L98/LS1

Its not really a 100, its 120 and up is when to me my car doesnt feel safe. Yea i know my car can do about 150 top out. But im not insane or stupid to end up killing myself just to see how fast my L98 is.

btw i had an 89 formula t5 305 tbi it went about 135 i believe when topped out

matts86cam

iTrader: (1)

86 z carb'd topped just over 100mph speedo was bouncing so much i cant tell for sure, had 170,000miles on it and rings were going. It was the first day I got it, I wanted to know exactly what it had and what it needed and since then I havent had it over 65mph. New engine in it now but I still have the stock. Plan on rebuilding it myself when I get the ***** to try it. Have to learn along the way you know. Been 6 months now and every single time I go into the garage I still grin ear to ear. These cars are bad***!!!!!

rojas1826

oooh what kind of volvo is it a t-something, i got an s80 t6 and after about 70 it seems like power kicks in and ive done 135 in it and slowed down right away. my camaro does 130something easily but stoopid trans wont shift to od so not much top speed there,so screw doin top speed in mine and im gettin bigger gears

ThreeOhFive

Never found out... 700r4 won't shift out of 3rd on WOT and wants to kick down if I let it shift and then press the gas again... I hate Automatics! Got to 108 and backed down fearing if my engine revved any faster, I would hang a rod.

92-RS-305-TBI

Ya man I'm glad to have a standard. But again on the speed limiter topic and pushing these cars places they don't belong...I did my limit once because I have to know what the top end is and how the engine manages and all of the other factors. So I hit the 110 governor and she was easy at 3 grand. That still leaves me 2k left before the red line which I am willing to touch from time to time but will never push. Although at I think 60 or 70 in 5th I'm only pushing 2k...so to get 40-50 more with only 1k more on the tach and 2k to spare...I know she can probably do much better...but staying safe is important. We all get these cars with a $*** eating grin on our faces waiting to see what we can't do with them, But when I hit eh...90 I think my hatch vibrates like it came from an unmentionables store. I never thought to check engineering or ever even heard of speed ratings on tires before...and so many of us find out what can make us fast before we even upgrade the important things like tires, brakes, and suspension. Before you go out in a boat don't you make sure to pack a life vest? But its ok to do 140 in a tank with brakes that are as strong as peewee hermon? I don't think so.

thomas1976

Yea I know, not a stock camaro, but I find it appropriate at this point in the tread.
http://www.youtube.com/watch?v=eK8AD4ayIs0

Damon

Had a 91 Camaro with the 3.1 V6 that would hit the fuel cutoff around 115 MPH on a slight downhill. Took a LOT of real estate to get it there, though. It was an automatic with 3.08 rear gears, if I recall correctly. The motor was only rated like 140HP or so.

Brother's old 86 Trans Am with 305 TPI (190HP) 2.73s and an automatic would get up to 130 and just stay there. Not hitting the fuel cutoff or rev limiter, it just wouldn't go any faster. And since the automatics back then wouldn't allow 4th gear upshift at WOT that was where the party ended.

Same car built as best we knew how to run the Silver State Classic Challenge race would almost touch 180 on a long straight with a motor that made somewere north of 600HP, near as we could tell. THAT was a wild ride! You think the lanes of a highway are pretty wide, but it's about all you can do to keep it running down the middle at those speeds. Doesn't take much of a cross-wind for you to see the Allmightly.

My 94 Formula (4th gen) with the LT1 motor, 6 speed and 3.42 gears went up over 140 a couple times (5th gear is used for top speed, 6th is a .5:1 granny gear for mileage) and had a little more left. I can imagine it was capable of surpassing 150. I had to replace the stock driveshaft with a good quality aftermarket aluminum unit. The stock unit would vibrate so bad over 110 it was like riding inside an electric razor.

I also remember reading a magazine article way back in the day about a police package 92 Camaro with the 350 TPI and no speed limiter pushing a little past 150 (and utterly humiliating the 5.0 Mustang police package car in the face-off).

Fast355

iTrader: (2)

Gotta love how GM refused to let the non fancy F-body 700r4s shift into OD at WOT, yet let my brick of a fullsize vans stock 700r4 do it. WOT around 120-125 MPH it would shift right into OD and keep going. It takes plenty of level, clear road, and a little time to get there. From 30-130 it took me about 40 seconds with a little 305 pulling 5,500 lbs with a 3.08 gear.

It never would do it with the stock 305, because it would top out at 110-115 MPH from lack of power, but once it was built up a little it had no issue.

ThePain

I tried racing a guy on the highway once, I hit 115 on my speedo and that's all she wrote. I think I was around 3000 rpm

and he was able to just push on real easy past me. At the time I just blamed crappy aerodynamics from my top being down and my little 305, but I guess it was the damn limiter.

91rscammie

iTrader: (2)

I used to get high performance chevy magazine and back maybe 12 years ago or so they did a article on how to make a 340 horse camaro go 185mph. Although 340 horse is not stock.