Cam specs...347 - Ford Mustang Forums : Corral.net Mustang Forum
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post #1 of 9 Old 07-10-2019, 10:08 AM Thread Starter
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Cam specs...347

Hello all,

Looking for advice shift points/ max RPM with the attached Cam Specs

Car/Motor Details

1982 GT 5spd 8.8 rear with 3.73

347
Scat Rotating Assembly
10:5 C/R
TF 11R Heads
Airgap performer with Quick Fuel 650 dbl pumper Mech secondaries
MSD 6AL2 and Pro Billet Dist.

Hopefully will get a dyno run in the future but looking for a good starting point.
Thank you in advance!

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post #2 of 9 Old 07-10-2019, 10:17 AM
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Hard to say, but I would start by shifting around 6000 and see if it likes that. shift up and down from there and watch to see what it likes.

Also, I think your carb a little small. I think a 750 would be better sized for that combo. That 650 would be great for a 302-331. It will work and probably work pretty well. I will bet throttle response will be really good.

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post #3 of 9 Old 07-10-2019, 11:30 AM
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Probably shift around 6300 or so peak power in the upper 5000s. That cam is probably a little bit small for that engine.

The easiest way to figure shift point is to put it on a dyno and do the math.
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post #4 of 9 Old Yesterday, 09:05 AM
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Bigger isn't always better.

I would try these specs instead:



224* intake/224* exhaust @ .050

.480/.480 w/ 1.6rocker

Thank me later.
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post #5 of 9 Old Yesterday, 09:12 AM
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HA HA!!
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post #6 of 9 Old Yesterday, 01:14 PM
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Quote:
Originally Posted by kjb302ho View Post
Bigger isn't always better.

I would try these specs instead:



224* intake/224* exhaust @ .050

.480/.480 w/ 1.6rocker

Thank me later.
You gotta B kidding.
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post #7 of 9 Old Yesterday, 03:16 PM
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post #8 of 9 Old Yesterday, 04:45 PM
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Quote:
Originally Posted by taco View Post
Probably shift around 6300 or so peak power in the upper 5000s. That cam is probably a little bit small for that engine.

The easiest way to figure shift point is to put it on a dyno and do the math.
This is good advice. I have a similar cam in my 347 and I shift around 6500.

1996 Mustang
347, 205 11R's, Box R Intake, Ported lower, custom comp cam, 42lb injectors, 255LPH, pro-m 80, 75mm Cheap-ass TB, 1 3/4 x 3in LT's, exhaust by me, A5 trans, 4.10

422WHP/456Ft/lb. Tuned using QH by Tony @ Tuners Inc.
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post #9 of 9 Old Today, 11:19 AM
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Comp Cams XE274HR. Had one in my 351W and though I never did get it tested N/A, it did put down 640hp/715lb ft through a 74mm On3 setup. I feel it would have easily made 430/450 naturally aspirated. Vic Jr heads 10.4:1 comp, TRW forged pistons stock rods stock crank, custom box upper and Tmoss ported Pro Products lower and tuned Megasquirt.

I originally built the motor for myself to be a mild, enjoyable and torquey setup that I would eventually run a small turbo at low boost with. A customer liked the idea so much that he threw a great deal that I couldn't say no to. One of the best all around off the shelf cams for engines in that displacement range. Great street cam.

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