Posted By: Sb Valiant
W2 Geometry - 11/11/12 05:57 PM
Has anyone ever heard not to run over a certain lift cam because of the geometry of the w2's pushrods?
W2 Geometry
Posted By: Sb Valiant
Re: W2 Geometry - 11/11/12 06:11 PM
I think I heard something like don't run anymore then a 575 lift because I notice on alot w2 small blocks the ones that run real good have a smaller cam like in the mid 500 range.
Posted By: Plymouth340
Re: W2 Geometry - 11/11/12 06:45 PM
i got a 650 roller in my w2 motor....
Posted By: Sb Valiant
Re: W2 Geometry - 11/11/12 06:48 PM
Thats nice man is that a pro dominator tunnel ram with 2 650's? What's the combo on that motor looks like a high 9 low 10 sec motor!
Posted By: Plymouth340
Re: W2 Geometry - 11/11/12 06:52 PM
yes pro dominator and 2 750s...ran 9.65 w2 motor in my duster
Posted By: Sb Valiant
Re: W2 Geometry - 11/11/12 07:18 PM
Very nice my friend has a pro dominator tunnel ram that I would like to buy off him. Also has a strip domiantor single plane that I have for sure getting off him. We got a 340 stock bore and stock stroke that we are trying to get run and you just get all kinds of different answers. It has w2 econo heads with 2.08 in valves and 1.60 ex. 13:1 trw pistons with a 606 lift flat tappet cam thats getting replaced because it's unknown to us because it was in the motor when we got it. Has a 8 bolt moldex crank and a M-1 intake with a 750 cfm proform carb and 1 5/8 headers. Trying to get it to run 10's with out going to a full roller because don't have the money. Any suggestions? All car is 2800 lbs with driver and has a 904 tranny with trans brake. 10" 4000 stall converter and we are putting in 4.56 gears. Best so far has been 7.56 in 1/8 with 1.65 60 ft
Posted By: 79410aspenrt
Re: W2 Geometry - 11/11/12 07:19 PM
630 lift solid roller in my w2 362'',
![Attached picture 7457997-006[640x480].JPG](https://board.moparts.org/ubbthreads/upload2/7457997-006[640x480].JPG "7457997-006[640x480].JPG")
Posted By: 340Cuda
Re: W2 Geometry - 11/11/12 08:58 PM
Last cam we had in a W-2 engine was .668 Intake, 0.704 Exhaust, solid roller.
Bill
Bill
Posted By: Plymouth340
Re: W2 Geometry - 11/11/12 09:03 PM
my w2 motor ran the best with 1000cfm holley and indy intake 14-1 compression 9.57 139.92mph at 2800 lbs...you need bigger header for sure and 8 inch converter,,them small blocks love rpm..
Posted By: bwhackd34
Re: W2 Geometry - 11/11/12 09:04 PM
Get rid of the small tube headers..... go 1 7/8 and give it more carb
Posted By: Plymouth340
Re: W2 Geometry - 11/11/12 09:05 PM
how fast is it? spraying it? looks good !!!
Posted By: Plymouth340
Re: W2 Geometry - 11/11/12 09:07 PM
Quote:
Get rid of the small tube headers..... go 1 7/8 and give it more carb
Posted By: mafo
Re: W2 Geometry - 11/11/12 09:15 PM
back when I still had my w2 motor (rip) 
, I used a mechanical roller with .760/.738 theoretical lift, thanks to the geometry the actual numbers where much less...
, I used a mechanical roller with .760/.738 theoretical lift, thanks to the geometry the actual numbers where much less...
Posted By: mafo
Re: W2 Geometry - 11/11/12 09:33 PM
The biggest problem is that to gain runner volume you have to have wide runners and lot of offset on the intake rockers, then you waste a lot of lift in the sideways motion of the pushrod...
mine had 1" offset which made it extreme, still managed to go 9.39
mine had 1" offset which made it extreme, still managed to go 9.39
Posted By: Plymouth340
Re: W2 Geometry - 11/11/12 09:47 PM
Quote:yes, how much lift do you think you lose on a 720 intake lift w2 motor becaues of the gemotry?
The biggest problem is that to gain runner volume you have to have wide runners and lot of offset on the intake rockers, then you waste a lot of lift in the sideways motion of the pushrod...
mine had 1" offset which made it extreme, still managed to go 9.39
Posted By: mafo
Re: W2 Geometry - 11/11/12 10:11 PM
Hard to guess, depends on offset
we did measure lift but I cant remember the exact numbers but it was more than I expected , I remember we had to measure 2 or 3 times just because it didn t make sense at first
we put one dial indicator on the lifter and another on the valve ,that was the moment I understood why they made 48* blocks
we did measure lift but I cant remember the exact numbers but it was more than I expected , I remember we had to measure 2 or 3 times just because it didn t make sense at first
we put one dial indicator on the lifter and another on the valve ,that was the moment I understood why they made 48* blocks
Posted By: 79410aspenrt
Re: W2 Geometry - 11/11/12 10:35 PM
Quote:
how fast is it? spraying it? looks good !!!
50 shot of spray with no tuning did 10.76 @ 128 mph. 1.65 60'. 3800 lbs race weight.
This was the first time I sprayed. Everything stayed together. I will make my way to 150 shot next summer.
Posted By: LA360
Re: W2 Geometry - 11/12/12 10:57 AM
Quote:
Very nice my friend has a pro dominator tunnel ram that I would like to buy off him. Also has a strip domiantor single plane that I have for sure getting off him. We got a 340 stock bore and stock stroke that we are trying to get run and you just get all kinds of different answers. It has w2 econo heads with 2.08 in valves and 1.60 ex. 13:1 trw pistons with a 606 lift flat tappet cam thats getting replaced because it's unknown to us because it was in the motor when we got it. Has a 8 bolt moldex crank and a M-1 intake with a 750 cfm proform carb and 1 5/8 headers. Trying to get it to run 10's with out going to a full roller because don't have the money. Any suggestions? All car is 2800 lbs with driver and has a 904 tranny with trans brake. 10" 4000 stall converter and we are putting in 4.56 gears. Best so far has been 7.56 in 1/8 with 1.65 60 ft
Sell the 10" convertor and put a 8" unit with around 5000-5500 of stall speed. That alone will liven your combination up.
Posted By: Guitar Jones
Re: W2 Geometry - 11/12/12 04:50 PM
My W5 has net lift figures of .698/.714 as measured at the retainer.
Posted By: 79410aspenrt
Re: W2 Geometry - 11/12/12 05:35 PM
Quote:
My W5 has net lift figures of .698/.714 as measured at the retainer.
What make of cam?
I'm building a 450+ small block. Using my w2's and tunnel ram. 13.1 comp and wondering about what cam to use.
Posted By: Guitar Jones
Re: W2 Geometry - 11/12/12 05:48 PM
Quote:Quote:
My W5 has net lift figures of .698/.714 as measured at the retainer.
What make of cam?
I'm building a 450+ small block. Using my w2's and tunnel ram. 13.1 comp and wondering about what cam to use.
It's an older Crane 340 Super Stock roller cam. I'm using 1.6 Harland Sharp rockers on it.
Posted By: Sb Valiant
Re: W2 Geometry - 11/12/12 09:31 PM
Yea we are building a set of 1 7/8 headers and I got an 850 holley but might build a 950 instead because it's just an out right better carburetor. I have a set of 5.13 gears and I notice alot of people run a pretty low gear it's just I don't know how we would make the 1/4 with it. We have a 29.5x10.5 tire and lite car. I don't know if changing the converter size and stall would either help or hurt the rpm's through the traps in the 1/4. I really don't want to be screamin the motor at 8000 rpm every pass but yet I want it to run good lol.
Posted By: LA360
Re: W2 Geometry - 11/13/12 01:07 AM
Your engine just isn't going to accelerate well with that converter, I would estimate your engine makes peak torque around the 5000-5500 rpm. Your converter would be quite inefficient also, so you would probably see a reduction in your trap RPM.
As anyone will tell you, make one change at a time.
As anyone will tell you, make one change at a time.
Posted By: Dartthunder340
Re: W2 Geometry - 11/13/12 04:35 AM
I'm not too sure you are going to be running a 10sec 1/4 shifting at 6600rpm with a stock stroke 340 and w2's. These things need to be wound up.