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How much power and 1/4 mile times. 

 

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 Post subject: How much power and 1/4 mile times.
Posted: Tue Sep 20, 2005 6:56 pm 
Getting Side Ways
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Ride: ford au wagon 4.0 na

Power: 170 rwkw

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I was just wondering what you guys get on the 1/4 mile and what sort of power do you have? If you can please mention mods.

I have dynoed 136-147.7 rwkws dev 4 cam jmm extractors and pod.No real 1/4 but a gtech best of 2 runs at 15.1

 

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Posted: Tue Sep 20, 2005 8:57 pm 
Getting Side Ways
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pretty sure mate if you do a search you will be able to find a thread, there was one not too long ago.

cheers
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Posted: Tue Sep 20, 2005 9:41 pm 
Getting Side Ways
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Ride: ford au wagon 4.0 na

Power: 170 rwkw

Location: Merrylands
NSW, Australia

Ta mate... :lol:

 

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14.77 @92.71mph July 06 14.52@95.68mph July 07 14.241 96.7 MPH in a shoebox/taxi au ford wagon!!Bwahahah still cant believe it!!!

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Posted: Tue Sep 20, 2005 10:36 pm 
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There's also some maths to guesstimate one from the other.

You need to know, time, weight of the car (and you/contents) in pounds, then do this...

RWHP = WeightLBs / (ETSecs*5.825)^3
RWKW = RWHP * 0.745699872

So in your case.... (I'll assume an EF/EL @ 3400LBs with a average sized guy in it)

RWHP = 3400 / (15.1*5.825)^3
RWHP = 195.1HP
RWKW = 145.5KW

Sounds about right.

If you have yout 1/4 TS (trap speed) in MPH you can do it this way:

RWHP = WeightLBs / (TS/234)^3
RWKW = RWHP * 0.745699872

 

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1998 DL LTD in Sparkling Burgundy, daily, 302W, stereo, slow - 97.5rwkw
2006 BF GT-P in Ego, mods. 293rwkw - 12.427@109 - 0-1000m 24.838@221

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Posted: Tue Sep 20, 2005 11:07 pm 
Getting Side Ways
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Ride: ford au wagon 4.0 na

Power: 170 rwkw

Location: Merrylands
NSW, Australia

Thanks data mine.. :lol: The car is an AU wagon which weighs 3790 pounds...and Im crap at maths but ill try to work this formula out.

 

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14.77 @92.71mph July 06 14.52@95.68mph July 07 14.241 96.7 MPH in a shoebox/taxi au ford wagon!!Bwahahah still cant believe it!!!

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 Post subject: q times
Posted: Tue Sep 20, 2005 11:27 pm 
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14.69 at 93.97 mph..
133.5 rwks or 140.5 rwkws without the snorkle on.. :wink:

 

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Posted: Wed Sep 21, 2005 7:46 am 
Getting Side Ways
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Ride: ford au wagon 4.0 na

Power: 170 rwkw

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That some good times mate!!

 

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14.77 @92.71mph July 06 14.52@95.68mph July 07 14.241 96.7 MPH in a shoebox/taxi au ford wagon!!Bwahahah still cant believe it!!!

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Posted: Wed Sep 21, 2005 10:11 am 
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Torque plays a big part in quarter times though doesnt it? Ive seen heaps of VN-VS strokers that have less rwhp than the ls1 boys with faster quarter miles/trap speeds. Sorry for the commy example though.

 

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Posted: Wed Sep 21, 2005 10:21 am 
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Yeah like Ktastrphe was saying, how does Torque come into the equation? As when we had a FM Dyno day last month I only managed to pull 114RWKW but then was able to slam out a reading of 420Nm of Torque at the same time. Though I havent done a proper 1/4 mile time. But managed to time myself doing 0-100km/h in 8.1 secs in an Auto

 

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Posted: Wed Sep 21, 2005 3:23 pm 
Getting Side Ways
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Ride: ford au wagon 4.0 na

Power: 170 rwkw

Location: Merrylands
NSW, Australia

Firstly no engine moves without torque or horsepower.People keep talking about torque but lets face its all the same.
In baxr6t I think they have a flat torque curve of 450nm coming on from 2000-5000rpm..ok? So how come these dont have a flat horsepower curve?It climbs. Why? Because horsepower increase as rpm increases in relation to the torque at each climbing RPM.

The maths of power relies on torque and rpm for its figure.So if you can maitnain torque and increase revs,your horsepower reading will climb and you will go faster.
So this brings me to my next point.A i6 with 200 rwkws at 6000 rpm will suck on the street if the low down torque suffers because the cam only kicks in at high speed.Are you with me?Let me explain further.A standard cammed i6 which puts out 110 rwkws as opposed to a 200rwkw i6 engine with crap low down dead torque ..ok. On the street and low speeds the standard cammed car can out acclerate the lbigger cam with dead low down torque.However once you hit the track and a 1/4 mile the bigger cam should have a higher terminal speed and the potential to do quite well on the 1/4.]
This is why people change their diff ratios ,get manuals so that that they can maximise low down takeoff.
In my opinion an engine setup should be designed to give its best in accordance to what you want.The best set up should have the best low down torque possible while increasing maximum horsepower to go down the 1/4.You really want something to take off well and then keep going faster as horsepower carries the car to its upper rev limits.

 

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14.77 @92.71mph July 06 14.52@95.68mph July 07 14.241 96.7 MPH in a shoebox/taxi au ford wagon!!Bwahahah still cant believe it!!!

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Posted: Wed Sep 21, 2005 4:38 pm 
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torque is what get's all that weight (mass) moving. That's why you don't see rotaries in falcadores, they're too heavy for the relatively torqueless rotary donk. But a big cube 6/8 is there cause they've got the torque required to get the big body moving. Of course once you're moving, it's the HP that'll make you fast (as long as you still have enough torque, to overcome air resistance, rolling resistance, etc.).

 

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1998 DL LTD in Sparkling Burgundy, daily, 302W, stereo, slow - 97.5rwkw
2006 BF GT-P in Ego, mods. 293rwkw - 12.427@109 - 0-1000m 24.838@221

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Posted: Wed Sep 21, 2005 4:45 pm 
Getting Side Ways
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My ED's doing around 200wkws at 4500 on 10psi with the auto slipping on the dyno... so really with the auto holding power and a few more rpm its closer to 230wkws on the road. I also run it on 14psi and it pulls alot harder, but wheelspin seems to spoil the fun alot of the time.
It has a dead stock 4.0lt with 220kays on it, Garrett custom built T4, Tial external w'gate, 3in/2.5in exhaust, big intercooler injectors fuel pump, Wolf ecu tuned by Cresent Motorsport... Once sorted some more it will easilly see 250wkws on 10psi and hoping to reach 300wkws on more boost... should pull a high 12
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Posted: Wed Sep 21, 2005 8:04 pm 
Getting Side Ways
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Age: 49

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Ride: ford au wagon 4.0 na

Power: 170 rwkw

Location: Merrylands
NSW, Australia

data_mine wrote:
torque is what get's all that weight (mass) moving. That's why you don't see rotaries in falcadores, they're too heavy for the relatively torqueless rotary donk. But a big cube 6/8 is there cause they've got the torque required to get the big body moving. Of course once you're moving, it's the HP that'll make you fast (as long as you still have enough torque, to overcome air resistance, rolling resistance, etc.).

Exactly!! Higher horsepower indicates a higher torque curve above peak torque.So ..peak torque say at 400nm 3400rpm but one with 130rwkws at 5000 rpm and the other with 200 rwkws at 5000rpm.The car with 200rwkws will have a higher curve of torque above peak torque figures(3400rpm) than 130.

 

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14.77 @92.71mph July 06 14.52@95.68mph July 07 14.241 96.7 MPH in a shoebox/taxi au ford wagon!!Bwahahah still cant believe it!!!

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Posted: Wed Sep 21, 2005 8:18 pm 
ACT Cruise Moderator
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Age: 36

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Ride: '06 BF GT-P

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just to clarify, it won't be HIGHER than peak torque, but won't fall away as quickly as the lower HP engine. ie. a flatter curve.

 

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1998 DL LTD in Sparkling Burgundy, daily, 302W, stereo, slow - 97.5rwkw
2006 BF GT-P in Ego, mods. 293rwkw - 12.427@109 - 0-1000m 24.838@221

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Posted: Wed Sep 21, 2005 9:01 pm 
Getting Side Ways
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Ride: ford au wagon 4.0 na

Power: 170 rwkw

Location: Merrylands
NSW, Australia

data_mine wrote:
just to clarify, it won't be HIGHER than peak torque, but won't fall away as quickly as the lower HP engine. ie. a flatter curve.


Yes. Absolutely.

 

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14.77 @92.71mph July 06 14.52@95.68mph July 07 14.241 96.7 MPH in a shoebox/taxi au ford wagon!!Bwahahah still cant believe it!!!

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