521" pump gas engine w/SCJ heads - 460 Ford Forum
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post #1 of 44 (permalink) Old 11-26-2014, 06:39 PM Thread Starter
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521" pump gas engine w/SCJ heads

solid flat tappet cam. The heads are ported.


B F Evans Race Parts
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post #2 of 44 (permalink) Old 11-26-2014, 06:44 PM
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Any cam info?
Why is the a/f so rich on the one bank? is that just a sensor reading badly?

either way, awesome numbers
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post #3 of 44 (permalink) Old 11-26-2014, 06:58 PM Thread Starter
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Any cam info?
Why is the a/f so rich on the one bank? is that just a sensor reading badly?

either way, awesome numbers
Because the cheap azz headers did not have bung in them...so the sensor was in the after piping which was blown plum off during the pull.

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post #4 of 44 (permalink) Old 11-26-2014, 08:16 PM
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Lem nice build............can u share more about the build?

What would be min stall for a street car on this build?

Cheers, Bob
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post #5 of 44 (permalink) Old 11-27-2014, 09:48 AM Thread Starter
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Lem nice build............can u share more about the build?

What would be min stall for a street car on this build?

Cheers, Bob
The owner intends to use a 3,200-3,400 stall.

O.t.b. tfs 'mafia' manifold, 1050 qfx carb and BP 93 fuel.

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Last edited by Lem Evans; 11-27-2014 at 09:50 AM.
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post #6 of 44 (permalink) Old 11-27-2014, 10:24 AM
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Lem, what makes the torque peak RPM so much higher than the HP RPM? Wide lobe center? The longer stroke? Do you have any head flow #s? Thanks.
Rob

Rob Hawes-Anchorage Rod Works-Anchorage, Alaska

Last edited by White Lightning; 11-27-2014 at 10:27 AM.
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post #7 of 44 (permalink) Old 11-27-2014, 10:50 AM Thread Starter
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Lem, what makes the torque peak RPM so much higher than the HP RPM? Wide lobe center? The longer stroke? Do you have any head flow #s? Thanks.
Rob
I'm not sure that i totally understand the question. Relative to the peak hp rpm.....it's governed mostly by the duration of the camshaft. The engine is going in a street driven car and the owner wanted a package that'd live with his converter and an operating range up to ~ 6,000 rpm. So, it was camed accordingly.

The intake side of the heads are 375ish cfm. There was no intent or attempt to make a 400 cfm port. Things were size to fit the application.

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post #8 of 44 (permalink) Old 11-27-2014, 12:45 PM
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Nice hp and tq numbers there Lem
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post #9 of 44 (permalink) Old 11-27-2014, 12:49 PM
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Quote:
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I'm not sure that i totally understand the question. Relative to the peak hp rpm.....it's governed mostly by the duration of the camshaft. The engine is going in a street driven car and the owner wanted a package that'd live with his converter and an operating range up to ~ 6,000 rpm. So, it was camed accordingly.

The intake side of the heads are 375ish cfm. There was no intent or attempt to make a 400 cfm port. Things were size to fit the application.
The torque peak is a lot higher than the HP peak, RPM wise. I've always seen the torque peak below the HP peak, RPM wise.
Rob

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post #10 of 44 (permalink) Old 11-27-2014, 12:52 PM Thread Starter
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Peak tq. is @ 4,800 rpm

Peak hp is @ 6,000 rpm
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post #11 of 44 (permalink) Old 11-27-2014, 01:05 PM
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Peak tq. is @ 4,800 rpm

Peak hp is @ 6,000 rpm
Oh geez lol. Sorry about that. I'm used to looking at the columns reversed. NEVER MIND! lol.
Rob

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post #12 of 44 (permalink) Old 11-27-2014, 05:56 PM
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Oh geez lol. Sorry about that. I'm used to looking at the columns reversed. NEVER MIND! lol.
Rob
Too much moooonshine......lol, or maybe not enough!!!
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post #13 of 44 (permalink) Old 11-27-2014, 09:38 PM
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what is the carb pad height on the manifold? nice build i have usually only seen this manifold used on 6700+ rpm motors. do you think a victor would cost much power?
thanks, wayne
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post #14 of 44 (permalink) Old 11-28-2014, 09:10 AM Thread Starter
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The carb pad is 5/8" taller than the victor.

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post #15 of 44 (permalink) Old 11-28-2014, 04:05 PM
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Awesome, This is almost my exact engine. I have a 501 w/ unported scj, TFS mafia, Holley 1050 dom, and flat tappet cam that I am looking to get dyno'd locally over the winter. With a good valve job and bowl blend, do you think I could come close to these numbers with my current cam?
specs are:
•Advertised Duration (Int/Exh): 290/298
•Duration @ .050 (Int/Exh): 257/265
•Gross Valve Lift (Int/Exh): .649/.649
•LSA/ICL: 110/106
•Valve Lash (Int/Exh): .018/.018
•RPM Range: 3000-7200
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