I am putting in a 350 .30 over with around 370-390 hp. What would my ET's be with 3.73's?? Thanks alot guys!

 

Well its hard to say without toque numbers, rpms, trans, toque converter, tires. Do you have the dyno sheet? And is 370 to the wheel?

I will generalize and say high12s with decent traction, decent track conditions, 700r4, with an appropriate torque converter.

Give us details

 

700r4 Tranny with a 2800 stall. Auburn posi with 3.73's. 255 street tires, around 350+ torque on a nice 85 degree summer day..... Megashifter, flowmaster catback, hooker supercomp headers. What about that?

 

Dragsim says with 370hp at the crank, good launch, and decent street tires, 12.7-12.8, low 12s with drag radials. Are those numbers at the wheels, or at the crank, and what rpm are they making peak at? I have hp at 5800rpm and torque at 3800 rpm.

 

More of a racing forum topic, me thinks...

 

id say low 14`s high 13`s.


there is no way 370 hp at the crank will get u in the 12.7`s in a stock chasis.Dragsims need rear wheel horsepower not crank.

 

Not trying to argue but 370 will easily get 12's in a effecient car.
We are talking 370 real HP - not the 400 HP that every guy in his hot rod says he has.
According to corral 370 Flywheel will get you 12.41 @ 109 in a 3600 lb car.. That is assuming traction and converter/driver is good.
My Camaro before charging it ran 12.0 @ 114 with just under 400
HP. 3300 lb car.
I have found corral to be very accurate to with in 1/10 of a second on my vehicles.

By the way my T/A with only exhaust/ headers and BFG drags
went 13.7 when it was stock. Do you think those 2 things added
140 HP over my stock 230 horse?

 

I dunno if it helps, but 10.1:1 compression ratio on 93 pump gas....edelbrock torquer plus cam, hyper pistons, 1.6 roller rockers, edelbrock 750CFM carb, edelbrock Performer RPM intake....

 

hmmm ok maybe u can help me out.I had my engine on a dyno and it made 450 hp@6600 400tq@5000.The best et i got out of this engine was 12.73@106.according to corral i should be in the 11`s.my car weight 3600 pounds has a th350 with a 10in converter(stalls at 3500) and 4.11 9 inch rearend.I run mickey thompson et drags 26x10.So what can be slowing my car down a second???i alway wonder how people are running 11`s in a 350 all motor, could it be alot of weight reduction???

i also not trying to start an argument but u contradicted yourself.
first u say its easy to run 12`s with 370 flywheel hp.but then u say"By the way my T/A with only exhaust/ headers and BFG drags
went 13.7 when it was stock. Do you think those 2 things added
140 HP over my stock 230 horse" so 230+140=370hp, and u only ran 13.7.

the answer to the question above is i dont think u gained 140 hp from those mods.I do believe in that it that a certain power to weight ratio to get X et and X mph.

 

Dragsim takes flywheel horsepower. Low 14s is like 270 fwhp.

 

Altitude of the track? Temperature, barometric pressure and humidity at time of run? Head wind?

Dyno HP is a corrected hp to a standard day at sea level. That doesn't mean that's what's going to get to the tires at the dragstrip. Dyno hp means you can compare you dyno numbers with anyone else in the country no matter where they live. A 12 second car in Denver is a lot faster than a 12 second car in Florida because in Denver it needs a lot more hp to be able to run 12 seconds.

I'm not sure how high Chicago is but if you went to Denver, you'd only have a 450 hp 13 second car but if you went to Florida, you'd probably be very close to 11's.

The different altitudes plus the affect from weather conditions determine how much hp the engine will make.

 

the track i go to has a barometric pressure 29.81 right now.im not sure how high the track is id guess around 600 feet.i visited this track 3 times this year and trapped always around 106-107.


rearwheel horsepower is what moves u.using flywheel hp numbers leaves out alot of the variables like driveline,accessories,etc.

 

Do you even see the sarcism?
Thats my point! It wasn't.
Why are you trapping 106? Could be many things.

 

Did i say i didn't know what rwhp was? Dragsim takes driveline loss into accout by having you select the tranny. And no, flywheel hp does take accessories into account. Gross hp is w/o accessories.

 

I ran 12's with a 330 horsepower crate motor. Its about power to weight and how you use that power.

 

Daverr,
Search under "density altitude calculator" and see what your track conditions are - or next time you are there ask someone w/a weather hand held weather station what the DA is??
Keep in mind a naturally asperated car losses approx. 5 % HP per 1000 feet above sea level.

My tracks alititude is 1400 FT, Most of the time DA is 2500ft+
DA=Corrected altitude


And like Stephen 87 said alot of dyno will give corrected HP for
sea level @ 70* and 15% humidity.
Also keep in mind that there are more determining factors than DA
like humidity - Which does not effect DA that much but will effect
ET alot. Also keep in mind that alot of dyno operators out there that you cannot trust. - ALOT!

Meeklay, Not sure if you are using stock heads? but if you are you will be a little hard pressed to pull 370 - Not saying you can not because its very obtainable.. But you will be hard pressed to.
Stock 881 casting flow in the neiborhood of 195 CFM - so with
a extremely effecient combo @ 2HP per CFM thats 390 HP that they can support.

 

I am not using stock heads, .58cc 601 heads

 

ok i checked the current conditions at the track i go to.right its 59 degrees F , 75 percent relative humidity,and 30.02 pressure.they have a DA calculator on the web site ,so todays condition calculates to 67 feet.



i guess im not using my horsepower right .u have to be making more than 330 hp to go 12`s.or your car is really light.

 

Wow! Nice conditions!

A vehicle weighing 3500 lbs making 323 HP can go 12.9 @ 105
according to corral.
I have a friend who can back that up, His 93 mustang made 254 HP@ wheels, Trapped 104 running 12.89 3250 lbs w/driver.
Bone stock engine, Just headers/ exhaust/ pullies ect. and alot of chassis wiork.
Was trying to beat record of 12.6 in a stock 5.0 but could never get his 60ft down to where it needed to be, or the sea level air where the record was made.

 

Trouble is it can also be too cold. Once the temperature gets below the mid 60's the track starts to get cold. A cold track is just as bad as a very hot track. Although the conditions may be fantastic, the track can be too cold to hook up all that extra hp.

 

so your saying with a zz4(350 hp)or a fastburn zz4 (385 hp) id be in the 12`s.But how????

 

I made 272rwhp and went 12.6 @ 106 on a bone stock suspension at 3200+ lbs. Im sure the car has a 12.4 in i in cool weather and the mph staying around 107-108 as it was last event!