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Re: W8/9 guys
[Re: 1967dartgt]
#1433882
05/10/13 09:24 AM
05/10/13 09:24 AM
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Joined: Dec 2007
Posts: 830
east coast
Otherlane
OP
super stock
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OP
super stock
Joined: Dec 2007
Posts: 830
east coast
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Quote:
3.91 with a 28/10.5 tire [/quote what rpm are you going though the traps at? Do you mind telling how fast you're going?
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Re: W8/9 guys
[Re: Otherlane]
#1433886
05/10/13 11:07 AM
05/10/13 11:07 AM
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Joined: Nov 2004
Posts: 4,330
Lynchburg, VA
Leon441
master
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master
Joined: Nov 2004
Posts: 4,330
Lynchburg, VA
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Not all W8/9 heads are the same. In fact there is about as much difference in the way these heads are ported as comparing a stock set of J's to a fully ported W2. The point I am making is there are a ton of variables. Bore and stroke would determine your gear as much as the size of the runners and valves.
I ran a set of Arringtons that would require similar characteristics as a Circle track W8/9. The engine was 4.125X4.125 I turned it 8,000 through the traps. If it had been smaller it would have needed to turn more to be productive. Camshaft changes this as well.
My CFE W8 on a 468 was only good for 8,600 RPM on the motor. With nitrous it was good for more. The same heads on a 3.800 stroke 421 needed to turn well over 9,000 to make the best runs.
With the powerglide I ran a 4.88 with a 33" tire for best results with nitrous. NA it did not make a ton of difference between 4.88 to 5.88. But, the cam and converter combo was way off and running an engine like this with a powerglide is difficult to get the best performance.
Leon
Career best 8.02 @ 169 at 3050# and 10" tires small block power.
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Re: W8/9 guys
[Re: Leon441]
#1433887
05/10/13 03:10 PM
05/10/13 03:10 PM
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Joined: Feb 2009
Posts: 1,019
Finland
mafo
super stock
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super stock
Joined: Feb 2009
Posts: 1,019
Finland
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5.29 with 31", cfe w8, 9000- 9200 rpm
-65 Valiant,420", all motor,2700#, dot tires, 8,42 @ 160,2
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Re: W8/9 guys
[Re: Otherlane]
#1433888
05/10/13 03:37 PM
05/10/13 03:37 PM
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Joined: Feb 2003
Posts: 3,456
Out West
408strokerdart
master
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master
Joined: Feb 2003
Posts: 3,456
Out West
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Quote:
408 strokerdart, you're running a glide right? A friend has a w8 car and going though the traps at 8000. His engine builder told him to gear the car to go though the traps at 7400.hes running 4.56 with a 28 in tires with a 3 speed trans. Should he drop down to a 4.10?
I'm not sure on his set up, but mine is only good for about 8200rpm max and I think a steeper gear might perform just a little better for me in the 1/8th mile. As Leon suggested, this combo with the glide probably isn't the best for maximizing ET potential. I have gotten it to preform pretty well though.....with lots of experimentation.
With that said, I haven't seen big changes in trap RPM with gear swaps that seem pretty big in difference of ratios. 
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Re: W8/9 guys
[Re: Otherlane]
#1433889
05/10/13 06:00 PM
05/10/13 06:00 PM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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Quote:
408 strokerdart, you're running a glide right? A friend has a w8 car and going though the traps at 8000. His engine builder told him to gear the car to go though the traps at 7400.hes running 4.56 with a 28 in tires with a 3 speed trans. Should he drop down to a 4.10?
Or go to a taller tire... that gives him 2 good things...
a bigger foot print for the launch and it will reduce
the rpm..... if he can fit the taller tire in there
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Re: W8/9 guys
[Re: MR_P_BODY]
#1433890
05/10/13 09:25 PM
05/10/13 09:25 PM
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Joined: Sep 2004
Posts: 1,499
San Antonio,TX
440W8 Duster
pro stock
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pro stock
Joined: Sep 2004
Posts: 1,499
San Antonio,TX
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29.5 11.5W Hoosier with a 4.56.
70 Duster W8 motor.
1.29 60ft 5.79 1/8 at 120 mph
glide with 1.80 gear
@3170 lbs.
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Re: W8/9 guys
[Re: Otherlane]
#1433894
05/11/13 10:22 AM
05/11/13 10:22 AM
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Joined: Jan 2007
Posts: 437
south central pa
bdaz smblk
mopar
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mopar
Joined: Jan 2007
Posts: 437
south central pa
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how much timing is he running?w8 ans 9 motors don't like a lot of timing.I run 4.88 gears in mine with a 29.5 tall tire
3120lb, small block, 10.5" tire, NA, through exhaust, full int, WITH 83/4 REAR, 9.0 at 150mph
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