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Opininon on cam
#1
OK, been working with a cam co. for my cc stock cleveland SCR 10:1. Here's what we came up with so far.
230/240 dur@.05 remember it's a solid cam.
114 LSA=51* overlap, more overlap than I wanted but smooth idle
ICL =114 (straight up) Intake closes at 71*= DCR 7.57
Adv. cam 4* ICL=110 for intake close @67*= DCR 7.83 so room to play with.
Running 3.73's/5spd. 2.97 first/ .62 od looking to cruse 70mph @ around 2g's...Am I dream'n or what?
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#2
What is the intended purpose for the car...street cruiser?

Here's a Wiki on cams to see some variants.
http://www.7173mustangs.com/thread-71-73...-cam-specs

This thread has some great info about cams.
http://www.7173mustangs.com/thread-how-d...m-you-want

[Image: 386_07_10_13_5_58_42.jpeg]
My Mustangs:
71 M-code Mach 1, Medium Blue/White Sport, 4R70W, 3L50, Factory Ram Air.
72 Q-code Mach 1, Pewter/Black Sport, 4-spd, 3L25.
65 Convertible, Britney Blue/White/White, more modified than original.
05 Convertible, Legend Lime/Tan/Tan, future classic??
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#3
No you are not dreaming

I am running CC heads on a 73 Q code block with a Comp Cams 282S and a 5 speed t45 and a 3.89 rear gear

I don't have the split pattern, but otherwise the specs are close.

I am at 2200 rpm on the highway with 255-35-17 rear tires (26 inches tall)

the down side is that the power band is a little higher than the cruising rpm. Still I can cruise the interstate without ever downshifting and can pass most cars without an issue.

3.50 gears had me so far off the power band that it was unpleasant to drive on the interstate in 5th.

[Image: 1_01_07_15_8_53_18.png]

"I love my Hookers!" and "Get some Strange" probably have a different connotation to non automotive enthusiasts!
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#4
If I understand the intended use correctly, it should work fine and be smooth with the 114 LSA and installed 4 degrees advanced. I am admittedly conservative on DCR/ECR 7.85 is about as high as I'd go with your combination/purpose and ever degrading pump gas. What company are you working with? Chuck
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#5
Perhaps I am missing something but the stated outcome (70 MPH at 2000 RPM with a 3.73 rear gear) seems to be at odds with my calculations (if you are using a "normal" sized tire).

Specifically, I thought the following formula applies:

TD = Desired MPH X Gear Ratio X 336 divided by desired RPM or in this case

TD = 70 X 3.73 X 336 divided by 2000 RPM = 43.86" diameter tire

Wallace Calculator seems to bear this out:

http://www.wallaceracing.com/Calculators.htm

...my $.02

BT

Do the RIGHT thing.
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#6
He stated a .62 overdrive, so with a 27 inch tire he would turn 2000 rpm at 70. Assuming a 26 inch tire he will be just under 2100 rpm

welcome
Jeff73Mach1;108098 Wrote:He stated a .62 overdrive, so with a 27 inch tire he would turn 2000 rpm at 70. Assuming a 26 inch tire he will be just under 2100 rpm

Keep in mind I am not a Tech Adviser, a Super Moderator or even a certified Mechanic, just an old gear head who makes a living as a lawyer LOL

. . . but I am right

[Image: 1_01_07_15_8_53_18.png]

"I love my Hookers!" and "Get some Strange" probably have a different connotation to non automotive enthusiasts!
  Reply
#7
How you make your living has nothing to do with it as you have provided a QUALITY and ACCURATE responseSmile. I (as a old school gear head) missed the Over Drive transmission information.

The following Site provides the "calculator" with overdrive.

http://www.dennysdriveshaft.com/potentia...lator.html

So YES, you are RIGHT...GREAT information, Jeff!

BT

Do the RIGHT thing.
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#8
I think you will have to carefully tailor the ignition advance curve to avoid pinging on 93 octane when load is applied in 5th gear such as maintaining speed on a hill on the highway or when lugging the engine in a lower gear but otherwise should work OK.

73 conv. 460, D0VE large valve heads, Performer RPM manifold, Voodoo 227/233 cam, Holley 950 HP carb, C6 trans, 3.25 trak-loc.
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#9
his set up nearly mimics mine and I went through the speedometer caculations more than a couple of times I just was in the right spot at the right time. I won't let it happen again lol

[Image: 1_01_07_15_8_53_18.png]

"I love my Hookers!" and "Get some Strange" probably have a different connotation to non automotive enthusiasts!
  Reply
#10
Don65Stang;108079 Wrote:What is the intended purpose for the car...street cruiser?

Here's a Wiki on cams to see some variants.
http://www.7173mustangs.com/thread-71-73...-cam-specs

This thread has some great info about cams.
http://www.7173mustangs.com/thread-how-d...m-you-want

Street Cruzr all the way.

Jeff73Mach1;108081 Wrote:No you are not dreaming

I am running CC heads on a 73 Q code block with a Comp Cams 282S and a 5 speed t45 and a 3.89 rear gear

I don't have the split pattern, but otherwise the specs are close.

I am at 2200 rpm on the highway with 255-35-17 rear tires (26 inches tall)

the down side is that the power band is a little higher than the cruising rpm. Still I can cruise the interstate without ever downshifting and can pass most cars without an issue.

3.50 gears had me so far off the power band that it was unpleasant to drive on the interstate in 5th.

These issues you point out are what I'm concerned about cuz I'll be below the power band too.

c9zx;108085 Wrote:If I understand the intended use correctly, it should work fine and be smooth with the 114 LSA and installed 4 degrees advanced. I am admittedly conservative on DCR/ECR 7.85 is about as high as I'd go with your combination/purpose and ever degrading pump gas. What company are you working with? Chuck

Kevin at Schneider, we've been emailing back and forth. He's been very helpful. I've sent emails to other co's and the usual response would be thin to non existant. Kevin is a good one, imo.

TommyK;108105 Wrote:I think you will have to carefully tailor the ignition advance curve to avoid pinging on 93 octane when load is applied in 5th gear such as maintaining speed on a hill on the highway or when lugging the engine in a lower gear but otherwise should work OK.

Yes, been studying coil on plug conversions and such.
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