400 distributor rework?
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Elder User
Joined: Jan 2004
Posts: 867
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From: Eastern Pa
400 distributor rework?
I have a 410 with 8.7:1 cr. edelborck performer, 600 edebrock carb, crane cam with a 2000-6000 powerband, headers, 350 gears with 33" tires. I've read numerous posts but dont' quite get the drift yet of what I need to look to do to the distributor. My main concern is having it properly curved and the right advance mechanism on it. I have no emmissions crap on it however it was originally a smogger with egr, air pump, cat etc. Many moons ago, ( about 30 years now) I used to rebuild and curve distributors in a speed shop but that was a different age, so I'm not unfamiliar with things, however I don't have access to a Sun or Allen machine like I used to.
Postmaster
Joined: Aug 2001
Posts: 4,270
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From: Delaware
I used that cam with my 4V Cleveland heads. That cam requires a high stall converter, I used a TCI Saturday Night Special.
That cam has an IVC of 72 degrees, you don't have enough compression for that cam, you need more than 8.7:1. I think that Crane recommends 10:1 or higher.
Give me your specs: Bore, stroke, head ccs, head type, piston dish cc's, and deck clearance, I'll simulate the motor.
That cam has an IVC of 72 degrees, you don't have enough compression for that cam, you need more than 8.7:1. I think that Crane recommends 10:1 or higher.
Give me your specs: Bore, stroke, head ccs, head type, piston dish cc's, and deck clearance, I'll simulate the motor.
New User
Joined: Mar 2004
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I'd Appreciate Your Opinions/simulations
Originally Posted by danlee
I used that cam with my 4V Cleveland heads. That cam requires a high stall converter, I used a TCI Saturday Night Special.
That cam has an IVC of 72 degrees, you don't have enough compression for that cam, you need more than 8.7:1. I think that Crane recommends 10:1 or higher.
Give me your specs: Bore, stroke, head ccs, head type, piston dish cc's, and deck clearance, I'll simulate the motor.
That cam has an IVC of 72 degrees, you don't have enough compression for that cam, you need more than 8.7:1. I think that Crane recommends 10:1 or higher.
Give me your specs: Bore, stroke, head ccs, head type, piston dish cc's, and deck clearance, I'll simulate the motor.
Specs:
Bore: 4.04
Stroke: 4.00
Heads: 80cc, 9.2:1 comp., 2.04/1.65 valves with 20 degree backcuts, fair amount of porting-polish chambers, exhaust humps removed, exhaust ports polished and cleaned up, intake cleaned up.
Pistons: Silvolite Hypereutectic 351c with 4.5cc valve relief 1.67 comp ht.
Deck Clearance: .045"
Cam: Custom Ground Comp Extreme Energy 4x4 210/218@.050 dur, .510/.524 lift, 8 deg overlap, 107 deg centerline, 111 LSA
Valve Timing:
Int. 2-BTDC 32 ABDC
Ex. 44 BBDC 6- ATDC
Rockers: Crane Energizer Street/Strip full rollers 1.7 ratio
Intake: Performer 400
Carb: Performer 750
All of this is in a 79 F150 4x4 backed by a stock C6 with a TCI Sat. Night Special HD converter and TCI SFI approved HD flexplate (cause i exploded the stock flex plate
).
Postmaster
Joined: Aug 2001
Posts: 4,270
Likes: 5
From: Delaware
That is OK. The torque is nearly flat from 440@2000 to 432@4000 RPM, with a peak of 446@3000 RPM. The HP peak is 348@4500 RPM. That cam is alomost the same as a 265DEH, with a liitle higher lift.
The Dynamic Compression Ratio is 7.7:1. It should run on any 91 or over gas. If 93 Octane is available in your area, you could have gone up to 0.5 higher in the CR.
With a 1.67 CH piston your deck clearance should be 0.0365. I used your figure of 0.045.
I assumed that you have headers in these calculations.
I don't think that you need a high stall converter with the small overlap of that cam.
The Dynamic Compression Ratio is 7.7:1. It should run on any 91 or over gas. If 93 Octane is available in your area, you could have gone up to 0.5 higher in the CR.
With a 1.67 CH piston your deck clearance should be 0.0365. I used your figure of 0.045.
I assumed that you have headers in these calculations.
I don't think that you need a high stall converter with the small overlap of that cam.
Lead Driver
Joined: Nov 2000
Posts: 6,641
Likes: 350
From: Albuquerque
I have found that a set up like yours responds well to a lot of initial timing but you need to limit total to 38 or so.
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Elder User
Joined: Jun 2003
Posts: 886
Likes: 1
From: Houston/Hope BC
Can you recommend spring/weight combo's and who has them?
Who makes the adjustable vacuum advance? I need all this stuff also.
Who makes the adjustable vacuum advance? I need all this stuff also.
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