Posted By: mrart01
4spd vs. 904 - 09/09/09 12:26 PM
Which is faster in the 1/4 , anyone make the switch ? Did u gain or lose
4spd vs. 904
Posted By: sixpackbee
Re: 4spd vs. 904 - 09/09/09 12:45 PM
All things being equal a 4 speed will beat an automatic every time.
Posted By: LAR_414
Re: 4spd vs. 904 - 09/09/09 12:47 PM
4spd is always FASTER. ET's could go either way.
Posted By: Anonymous
Re: 4spd vs. 904 - 09/09/09 01:27 PM
Next time your at the track see what every racer is running just about every car will have an automatic in it, i;ll put a auto up against a 4-speed any day of the week.. 
Posted By: rowin4
Re: 4spd vs. 904 - 09/09/09 01:41 PM
Ask Charlie Westcott [ War fish ] Now they want to penalize him because he's running a stick. 
Posted By: Cab_Burge
Re: 4spd vs. 904 - 09/09/09 02:36 PM
Quote:It depends on the car and driver
Which is faster in the 1/4 ,
If you could make all things equal the stick trans and clutch has less parasitic drag and torque converter slippage so it will be faster and quicker due to those reasons, at least on paper 
Your results may vary 
Posted By: LAR_414
Re: 4spd vs. 904 - 09/09/09 02:59 PM
Don't get confused on auto vs stick at the track. People run the autos, because they are CONSISTENT and easier to hook up and easier to shift. Makes for great bracket racing.
Doesn't mean they are FASTER or Quicker......just easier.
Doesn't mean they are FASTER or Quicker......just easier.
Posted By: S/ST 3040
Re: 4spd vs. 904 - 09/09/09 03:02 PM
I'd bet on the 904 over 95% of "833" racers. 
Posted By: fourgearsavoy
Re: 4spd vs. 904 - 09/09/09 04:25 PM
Quote:
I'd bet on the 904 over 95% of "833" racers.
I went 11 rounds one day and beat a 340/904 combo in the final round for the win with an "833"
Gus
Posted By: Anonymous
Re: 4spd vs. 904 - 09/09/09 04:31 PM
Quote:
I'd bet on the 904 over 95% of "833" racers.
I'll second that...
Posted By: Rapid340
Re: 4spd vs. 904 - 09/09/09 04:33 PM
You can't duplicate the torque multiplication of an automatic torque converter with a stick. They are almost always quicker but less efficient.
The trick setup would be an automatic that locks up the converter after the launch. You get the best of both worlds. I dont know any mopar guys doing it. I think a lockup 904 wouldnt survive with much more torque than a stock motor at WOT.
There are some GM guys with this setup.
The trick setup would be an automatic that locks up the converter after the launch. You get the best of both worlds. I dont know any mopar guys doing it. I think a lockup 904 wouldnt survive with much more torque than a stock motor at WOT.
There are some GM guys with this setup.
Posted By: LAR_414
Re: 4spd vs. 904 - 09/09/09 04:45 PM
Not a perfect comparison, but look at SS/AH class. There you have 727 cases with 904 guts and every trick rollerbearing known to man. Very very efficent converters and transmissions. You also have 4spd stick cars there. I'm not sure what stick they are, but they are still a stick.
The stick cars are a little lighter weight, so it's not a perfect comparison at all.
Stick cars out MPH the 904's, and they are at about the same ET....right now.
The stick cars are a little lighter weight, so it's not a perfect comparison at all.
Stick cars out MPH the 904's, and they are at about the same ET....right now.
Posted By: S/ST 3040
Re: 4spd vs. 904 - 09/09/09 05:01 PM
SS/AH ala Charlie Wescott Sr.
Posted By: MoparforLife
Re: 4spd vs. 904 - 09/09/09 05:02 PM
Quote:Quote:
I'd bet on the 904 over 95% of "833" racers.
I went 11 rounds one day and beat a 340/904 combo in the final round for the win with an "833"
Gus
Doesn't mean you are quicker or bang the gears any better. Just had a better package.
Back 'in the day' the 4 gear cars were quicker but do to improvements in transmission parts and converters available that no longer is as true as it once was. Also there aren't that many good 4 speed drivers left. Used to see a lot of 4 speed drivers that could bang a gear keeping the right foot on the floor (I could even do it (no more)) but not so many any more.
Posted By: S/ST 3040
Re: 4spd vs. 904 - 09/09/09 05:07 PM
Quote:Quote:
I'd bet on the 904 over 95% of "833" racers.
I went 11 rounds one day and beat a 340/904 combo in the final round for the win with an "833"
Gus
I meant in the same package.
All's I'm saying is; most 833 guys can't nail their shifts with any kind of consistancy.
You might be in that other 5% though.
edit: I also see you don't run the 833 anymore.
Posted By: emarine01
Re: 4spd vs. 904 - 09/09/09 07:06 PM
Now I will confuse everyone with this, In the mud I have never seen anyone shift fast enough to keep up with a auto trans, most manual shift trucks fall flat on the shift, the resistance in the mud is grater than pavement and instantly slows down the drive line dropping rpm too much on clutch release, this factor must come to play in drag racing to some extent 
Just something to kick around 
Just something to kick around
Posted By: mrart01
Re: 4spd vs. 904 - 09/09/09 11:34 PM
the combo i have i bought off of a class racer w/ a 360 /904 since i have a 340 i`m looking 4 any advantage i can get over a 360 even if it`s a 904...727...or 4 spd.
Posted By: S/ST 3040
Re: 4spd vs. 904 - 09/09/09 11:54 PM
Quote:
the combo i have i bought off of a class racer w/ a 360 /904 since i have a 340 i`m looking 4 any advantage i can get over a 360 even if it`s a 904...727...or 4 spd.
Who did you get it from?
Posted By: mrart01
Re: 4spd vs. 904 - 09/10/09 12:08 AM
vance cummins out of grand haven michigan
Posted By: 68shifter
Re: 4spd vs. 904 - 09/10/09 12:17 AM
4 speed for me, and for alot of years. But a 4 speed will probably cost twice as much starting from scratch than an auto. It all depends on what you want. If you want something only 5% can shift and have that ego push, excellent. Otherwise get what everyone can drive and stay with the auto.
Just my
Just my
Posted By: mrart01
Re: 4spd vs. 904 - 09/10/09 12:50 AM
It`s a 4spd car which i already have and 727 w/a 5000 tci but no 904 so i guess we know which way i`m headed
Posted By: fourgearsavoy
Re: 4spd vs. 904 - 09/10/09 02:35 AM
Quote:Quote:Quote:
I'd bet on the 904 over 95% of "833" racers.
I went 11 rounds one day and beat a 340/904 combo in the final round for the win with an "833"
Gus
I meant in the same package.
All's I'm saying is; most 833 guys can't nail their shifts with any kind of consistancy.
You might be in that other 5% though.
edit: I also see you don't run the 833 anymore.
This was back in about '93 and my power level was pretty low,Now I change parts BEFORE I break them so I can still sell the old stuff.
When I leave off the 2-step I don't lift until the stripe.The Face-Plate Liberty gears are the poop for a street/strip stick car
Gus
Posted By: Cab_Burge
Re: 4spd vs. 904 - 09/10/09 03:24 AM
Sell the TCI, if you can, and use that money to buy a good converter for your car