your 1/4 mile time

Well almost. To reach 109 mph in the quarter mile in a 3700 pound car you need a certain amount of power (regardless of your chice of measure: kilowatts or horsepower). Work/time is important here. Torque is simply a measure of work, not sufficient in calculating quarter mile performance. Sure cars with higher torque have a tendency to accellerate more quickly, as do cars with more horsepower. But torque alone isn't enough information, because it's a static figure, missing the variable of "rate".

Top speed at the end of a quarter mile run is the best indicator for rear wheel horsepower, providing we know the mass of the car (or weight, providing that we're drag racing on planet with gravity=9.81m/s²). It doesn't change much, even if the tration and gearing aren't optimal, up to a point (remember, we're not talking about 1000+ hosepower cars here).

Knowing that your car has 450 foot-pounds of torque at 3600 RPM is indeed sufficient information to calculate the horsepower at that exact RPM using the simple formula: horsepower=(torque)x(RPM)/5252

This will give us roughly 310 hosepower, however these hosepower are at exactly 3600 RPM. In order to do a quarter mile run at 109mph, you'll
need to have a few more horsepower, namely 370 (plus or minus a few percent). You'll find that your engine does indeed produce the above mentioned 370 HP (providing the information about your car's weight and mph at the end of the 1/4 mile are correct). Using the same formula, and assuming that your engine's torque doesn't drop off drastically above 3600 RPM, you'll find that your engine makes it's peak horsepower at about 4300 RPM.

None the less, the info you gave about 310HP and 450 foot pounds at 3600 RPM are quite believable and probably very accurate. Peak torque at 3600 RPM sounds right, but 3600 RPM is definately not where your engine makes it's peak horsepower, unless you have a substancial loss in torque above that RPM, thus making 109mph in the quarter mile impossible.

Put your car on a chassis dyno and you'll find it makes 370 horsepower at damned close to 4300 RPM at the rear wheels.

that is very good math you got there.i think the reason i got max HP at 3600 is cause the turbo spiked at 22 psi at spoolup and droped off to 19 throughout the run. and right at 3600rpm the turbo is spiked i beleive. but throughout the run my OTHER max HP was right around 4400rpm(you were very close)and around 310HP or so. but the car did max at 316HP. but these Dyno numbers were with my stock turbo and i have upgraded to a 49mm(Ta-49)Turbo and it;s max HP rating is 545 Vs. the stockers 360, and i think i max out my stock turbo. so with this new turbo it should produce 400+HP and 550+Torque. plus i have a new chip burned for 28* timing in 1-2 and 26* in 3rd and this timing change will give me a little more top end.so 11.50's@118mph is what i'm shooting for.should not be difficult at all.

Cody

ok.

Well almost. To reach 109 mph in the quarter mile in a 3700 pound car you need a certain amount of power (regardless of your chice of measure: kilowatts or horsepower). Work/time is important here. Torque is simply a measure of work, not sufficient in calculating quarter mile performance. Sure cars with higher torque have a tendency to accellerate more quickly, as do cars with more horsepower. But torque alone isn't enough information, because it's a static figure, missing the variable of "rate".

Top speed at the end of a quarter mile run is the best indicator for rear wheel horsepower, providing we know the mass of the car (or weight, providing that we're drag racing on planet with gravity=9.81m/s²). It doesn't change much, even if the tration and gearing aren't optimal, up to a point (remember, we're not talking about 1000+ hosepower cars here).

Knowing that your car has 450 foot-pounds of torque at 3600 RPM is indeed sufficient information to calculate the horsepower at that exact RPM using the simple formula: horsepower=(torque)x(RPM)/5252

This will give us roughly 310 hosepower, however these hosepower are at exactly 3600 RPM. In order to do a quarter mile run at 109mph, you'll
need to have a few more horsepower, namely 370 (plus or minus a few percent). You'll find that your engine does indeed produce the above mentioned 370 HP (providing the information about your car's weight and mph at the end of the 1/4 mile are correct). Using the same formula, and assuming that your engine's torque doesn't drop off drastically above 3600 RPM, you'll find that your engine makes it's peak horsepower at about 4300 RPM.

None the less, the info you gave about 310HP and 450 foot pounds at 3600 RPM are quite believable and probably very accurate. Peak torque at 3600 RPM sounds right, but 3600 RPM is definately not where your engine makes it's peak horsepower, unless you have a substancial loss in torque above that RPM, thus making 109mph in the quarter mile impossible.

Put your car on a chassis dyno and you'll find it makes 370 horsepower at damned close to 4300 RPM at the rear wheels.

I like your math, Im not saying that it is wrong but, Turbo buicks are goofy. I don't agree with his numbers, im not saying that, I'm just asying it's not uncommon to see a GN with like 400 HP and like 500+ ft-lbs of torque. I wish I could launch with 5 PSI on street tires. I can only launch at 2. However with the slicks I car launch at 10PSI.... Its fun

12.68@109 MPH with the only mods being 42# injectors, SMC Dual nozz alcohol kit. TE-60 turbo with 3" downpipe, Pump gas (93 octan) 24PSI

11.81@116 MPH with all the same stuff except slicks and 118 torco fuel. and 27PSI. Had to turn the alcohol off for 118 torco..... With that fuel it makes a cool 20' blue flame :evillol:


Did all this without a posi open rearend one wheel wonder.

It weighs 3690 LBS with me in it.

9.47 @ 144mph, 1/4mile, at 8800 corrected altitude.
1967 nova super gas, 2700# w/driver
509 bbc, small 310 dart pro 1heads, normal mods.
Havent had it to sea level yet, but hoping for 8.90s
we run a 10.53 super gas index in denver

69 RS Camaro, 11.96 at 111mph 1/4. Street tires and mufflers. NO NOS, just cast iron head 406 small block. Full interior and about 3100lbs. Drove it to the track and drove it home. My 70 Nova, 9.83 at 132mph. 434 small block. Fully tubbed rear end, fiberglass body panels but still weighs 3000lbs. Ran Super Street at many NHRA races and winning my shares of Wally's.

Hey Super Gas, if I had a 509 that didnt go any quicker than 9.47, I would put that motor in my TOW vehicle. I dont care if it was at 8000 ft. 2700lbs is kinda heavy but thats alot of cubes. We have 500 cube fellas around here running 8.50 and 8.60s in super gas trim. You might want to go Small Block and make things interesting.

Well Shadetree, First Off I'll Bet You A Hundred Bucks You Dont Have, And Never Will Have A Wally, Because If You Did, You Would Be A Better Racer And Sportsman Than Your Reply Shows You Are. Second, Why Dont You Bring Your Cars Up Here To The Mountain And Run Em In The Thin Air, Ill Throw Some More Time In My Throttle Stop To Run Super Street, And We'll See Whos Laughing Through The Traps. My Car Is A Ten Year Old, Mild Steel Chassis Car, A Bit Heavy And Dated Compared To The 1700# Cm S/g Cars That Are Running Up Here, And A 509 At This Alltitude Is Quite Small Compared To The 572's And 632's That Most Of The High Altitude Super Class Racers Are Running. My Motor Is Pretty Maxed Out With The Heads She Has, But I Have A Dyno Sheet To Show 842 Hp At 7400 Rpm, And 696 Ft Lb At 5900 Rpm. Thats At Sea Level Of Course, We Lose About 30-33% Of It At Altitude. So Why Dont You Put Your Money, Or Your Dyno Sheet Where Your Mouth Is, And Learn To Respect Other Peoples Equiptment. Like Your Mom Always Said, If You Dont Have Something Nice To Say, Keep Your Mouth Shut!

Hey Super gas, no sense of humor? MY my, no reason to get all upset. Your right, I have no Dyno sheet, dont need one. You are incorrect about the Wally's. Got FOUR of them and a Divisional Championship a few years back. Wasnt aware of a CM supergass class. CM sounds like comp el. to me. Also wasnt aware of any supergass car weighing 1700lbs. Sounds about 500lbs light to me if i remember my NHRA rules. But what the heck, this is all fun and games, no reason to get your rocker arms in a wad. My mom always said it aint bragging if its true. Mellow dude, its just for fun.

Shadetree, No Hard Feelings, First Off, Congrats On The Wallys, I'll Have My First Soon I Hope, Planning On Attending 3 Div And 2 National Events This Year, Maybe It'll Be My Year. Second, I Was Referring To Chrome Moly When I Wrote Cm, And You Are Close, Sg Weight Is 2100# Except 4 Cyl, Which Is 1200#. I Was Referring To All The Super Class Cars That Have To Add Weight To Make Class, But Take It Off To Bracket Race. Anyway, Are You Doing Any Super Class Or Bracket Racing? I Am Currently Building A 94 2wd S10 For My Wife To Bracket Race This Year. Just A Small Block And A Th350. Try To Get Her In The Mid 12's But Keep It Street Legal. She Wont Drive My Nova, I Sit So Low And Back She Cant See Out Very Well, She Drove Our Friends 72 Nova, 377 And Glide Last Year, She Went 11.98 @ 113mph Her Second Pass, She Didnt Do A Burnout, Didnt Use The Trans Brake, And Didnt Leave On The Converter, But She Had A Blast. So Shes Hooked On Driving Now, Shes Not Content With Helping Me And Running The Weather Anymore. Take Care

I have a Chevy Silverado 2500HD Ext Cab Long bed with the 8.1 V8, and the best I ran was a 15.97 @ 83mph. All I added was a Gen II K&N intake and Magnaflow exhaust.

Hey Andreancic, thats pretty quick for a truck that weighs over 5000lbs. Hope you dropped your tailgate, get that body out of the wind.

It's all in the sig!

who has the fastest street legal car? both on and off slicks.

Well I have run 10:39 and I drive my Mustang to work every day. It is a 72 mile round trip also...

i use to run 13.4s at 109 but i yanked the motor out, i see some of yall go to mir? how often do yall go? ive been goin these past few weeks, and ill be up there this fri, but not im my camaro, ill be racin a bronco

my best run was a 16.2 in a bone stock ford bronco

1988 toyota 22R Carburated, 14.29 all motor and 12.66 w/ nos.

1999 Honda Civic Si completely stock B16A2 engine.
1595 cc 160 hp@7600 revs.

15.37 at sealevel (car and driver tested it at 15.6) but i did some weight reduction and lowered pressure of tires.

16.6 at 5400 ft above sea level.

i would imagine a low 15 in my car :dunno:

Hey, your car's probably about even with mine... but I've definitely got the cool factor over on you...

1963 Ford Galaxie Boxtop w/4bbl 390: Completely untested... *warning! estimated numbers follow*
0-60 in the high 6's or low 7's
1/4 mile in the upper 14's or low 15's (it's an auto trans... calm down)

around 320bhp/400lb-ft. at the wheels (estimate based on stock numbers and what little I've done so far)

the bloody thing weighs about 3900 with no driver... so there's a good chunk of my slow times... but hey, this thing is like 99% stock the way it is... and as soon as I get a job (got one lined up starting in mid-june... I'm about to turn 17 btw) I'm gonna completely work the engine over... replace the cam, piston heads, intake manifold, carb, essentially everything on the motor but the block.

12.73 @ 113 with no traction in first... dire need of slicks! :rolleyes:

1969 Camaro, can see car at www.agbulletracing.com Best run was a 9.12 up until Sunday, then got it down to 9.09 @ 145. In car video of a 9.12 pass will be up shortly. Didn't have the camera in during the 9.09 run. Torque converter blew up 2 runs after the 9.12.

hey quickchange i have a question why does my dads camaro run a 6.89 and yours runs a 6.91 wait a 6.89 is faster than a 6.91 that means you dont have the fastest car on the board

but still anything in the 6's is stupid fast congrats on the time
hey my chevelle with slicks only runs a 9.2 but i hope to beat it this weekend i just gutted it

well anyway nice car

but

hey quickchange i have a question why does my dads camaro run a 6.89 and yours runs a 6.91 wait a 6.89 is faster than a 6.91 that means you dont have the fastest car on the board

but still anything in the 6's is stupid fast congrats on the time
hey my chevelle with slicks only runs a 9.2 but i hope to beat it this weekend i just gutted it

well anyway nice car

but


I'm curious what all is done to your Chevelle to get in the 9s. Maybe 9.20 in the 1/8. It takes a lot more than slicks to make a car fast.

:bs:??????

no it runs a 9.2 on the 1/4
it has a edelbrock 502 board to a 540
it also has a tubro 400 shifter
overdrive system (6 speed with overdrive)
a blower
tubbed tires
nos
and alot more but i dont say

im raceing this weekend and im going to post pics

and ya your right it does take alot more than slicks to run that fast

o ya my dads camaro runs the 6.89 on the 1/4 to

no it runs a 9.2 on the 1/4
it has a edelbrock 502 board to a 540


hummmmm.... well i didnt know why i thought that was strange at first. but i do now. guess what....


EDELBROCK DOES NOT MAKE 502'S

infact, they only make sbc 350's. now would you care to explane this one? anyone else care to have a look.... http://www.edelbrock.com/automotive/index.html
go to the link then select crate engines on the laft side.

no it runs a 9.2 on the 1/4
it has a edelbrock 502 board to a 540
it also has a tubro 400 shifter
overdrive system (6 speed with overdrive)
a blower
tubbed tires
nos
and alot more but i dont say

im raceing this weekend and im going to post pics

and ya your right it does take alot more than slicks to run that fast


I'm going to throw the BS flag again. :bs:

You say in this quote, you have a blower. However, in your pics a couple posts later, there is no blower, unless you don't know what a blower is, which wouldn't surprise me. Also, from your poor wording, they made a Turbo 400 trans, but it was not a 6spd.

lol, lowsonoma, umm... look at the user names agin. the pictures are of my 68 chevelle. i am not the other "68 chevelle" my name is "68chevelle". there has been lots of confusion ever sence he got on here and people have been starting to think im an ass because of the way he is and they think im him. i dont like it. im not mad at your or anything dont worry im just clarifying for you and anyone else who reads this. check out my post right before yours about his 502 though. its cant be so. read his other posts too. as far as you calling BS on him though it still stands true as far as im concerned. just the pictures are of my car and on my sig not his.

like i said befor

it is CUSTOM MADE MY EDELBROCK
they dont sell theese motors in stores and you cant by them

they specialally made it to my car

really so if i call them up and ask them to make me a 502 they will... well i think i will go ahead and do that.

like i said on the other topic i am going to put pics of my chevelle befor and after it was street legal

maby... they did for me
but its going to cost you

alot

My bad "68Chevelle" I was wondering why he would be callin himself out on a lie. But I get it now. I think the other one is about 14 years old, and just bored now that school is out for the summer. He joined this forum just a few days ago, and already has over 50 posts.

well we are all still waiting. originaly you said they were being developed and then you said you would take some this weekend. what happened to the ones being developed? that was days ago. and if you have the money for your car then i would think you have the money for a digital camera so go buy one and take some pics and put them up here now. please

the ones being devoloped are old pics and i had the naggitives lieing around
their of my little bro 2 years ago standing infront of my car with his prom date

again this was 2 years ago it was when my car was street legal

still looks good thogh

the ones being devoloped are old pics and i had the naggitives lieing around
their of my little bro 2 years ago standing infront of my car with his prom date

again this was 2 years ago it was when my car was street legal

oh ok. my bad. i didnt realize they were of your car when you were 16,(your profile says your now 18 for a few more days), of your "little bro" who at the time was probably 15 at the oldest, seing as how you were 16 and he is your little bro, with his prom date. your bro must be good looking to be 15 and have some older girl want to talke him to prom, unless your school lets freshman go to prom. i know my old school didnt unless it was with a junior or senior.

dude do u really think that i spent time doing my profile
i was just filling out the forum as fast as i could
im 23
not 18 and i will be 24 6/24/88
sorry would you like me to change my profile

o ya did u call edelbrock yet

ya you probally did but they said they would make the engine and now your pissy

no actualy im doing what i was asked to do, im not saying anything else bad tword you.

Still waiting for pics from last weekend. We ever going to see them????

On slicks I ran a 11.4 at over 120mph. The <A TITLE="Click for more information about car" STYLE="text-decoration: none; border-bottom: medium solid green;" HREF="http://search.targetwords.com/u.search?x=5977|1||||cars|AA1VDw">car</A>; was having some problems though, probably would have went 11.1 or maybe a 10.99. The ecu was kicking the rev limiter back to 6.5k rpm when it's normally 8.1k rpm. Killed the powerband bad. Shooting for mid to low 10's the beginning to mid season and 9's by the end. This is a street legal car that is driven everday, no trailor queen here. 00 honda civic coupe w/b18c1 turbo, full interior and a cage.

Yeah but its still a civic!!

dad owned a 1968 camaro that went a best of 10.90@? in the late 70's, early 80's, but it blew the converter on that run. On average prob. high 11's low 12's@ about 110.

Grand Prix Turbo (Modded GTP) doing 10.674 @ 129.34 mph (1.672 60') in a 1/4 mile, with a 670hp.

Turbo Grand Prix:
http://www.intense-racing.com/GTP/TurboGP.html

Powered by 3800 FWD engine

I have a Jerry Hass

My best time is 9.08

Monterrey Mexico

9.08? what kind of car?

13.67 1/4 mile @ 99.34 MPH with a 8.8 1/8 mile in a 98 Buick Regal

Best in my Nova N/A on et streets is 11.37 at 117 mph, with 100 hp shot of spray 10.71 at 124. Street tires (non-drag radials) 11.71 at 115.

Firebird's best was 12.89 at 107 on m/t sportsman pros and 13.00 at 106 on stock goodyears.

Truck has run 15.71 at 85 mph, bone stock

Derek

Not as fast as some on here, but not too shabby for a daily driven truck :) [email protected] That was before the heads & intercooler, last dyno was 432rwhp/422rwtq. Killed the tranny last week tho, new built tranny is going in this week, then we'll see if I can't pull some 11's out of her :biggrin: