Mild 440
#2605704
01/13/19 01:20 AM
01/13/19 01:20 AM
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Joined: Jun 2013
Posts: 869 Keizer, Oregon U.S.A.
elmor353
OP
super stock
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OP
super stock
Joined: Jun 2013
Posts: 869
Keizer, Oregon U.S.A.
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25 years ago I put together a 440 for my 70 Duster. Nothing spectacular, just a slightly warmed over stock 67 engine. I used factory style replacement pistons with 1.990 compression height to give me 9.3 to 1 compression, 452 heads with M.P. #933 valve springs, M.P. 280-.474 cam topped with a Weiand 8009 intake thru HP manifolds. 340 torque converter into an 8.75 with 3.91 gears. This was really fun to drive and it got me $1275.00 worth of tickets for doing a burnout in the little burg I lived in!(over zealous young cop) Fast forward to today. I find myself looking to build another similar engine for my 77 short-wide pickup. I have another 67 short block that was just rebuilt, with the same type piston, a fresh set of 452 heads that have Crane springs good for .560 lift and an Eddy RPM intake, headers this time and another 340 converter. The previous engine made 430hp. I know technology has advanced, so I'm looking for suggestions on an up to date cam profile. If you were putting this together for yourself, what cam would you pick. The truck weighs 3900lbs and has an 8.75 with 3.23 gears. It will be a fun cruiser, parts chaser and only see the track once or twice a year.
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Re: Mild 440
[Re: dIc dOc Deity !]
#2606330
01/14/19 09:04 AM
01/14/19 09:04 AM
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Joined: Jul 2004
Posts: 3,799 Arlington, Texas
bobby66
master
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master
Joined: Jul 2004
Posts: 3,799
Arlington, Texas
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I’m surprised no one mentioning the 67 pistons with a set of 452 heads !! ... that be looow compression! About .090 in the hole. Wouldn't go too big on the cam in a 3900lb. truck.
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Re: Mild 440
[Re: elmor353]
#2606429
01/14/19 01:43 PM
01/14/19 01:43 PM
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Joined: Jan 2003
Posts: 14,479 So. Burlington, Vt.
fast68plymouth
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 14,479
So. Burlington, Vt.
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At .030 over, heads milled to 84cc, steel shim gasket, pistons down the hole .090”........ 9.16:1
Good candidate for the 75cc e street heads.
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
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Re: Mild 440
[Re: elmor353]
#2606935
01/15/19 02:26 PM
01/15/19 02:26 PM
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Joined: Jan 2003
Posts: 14,479 So. Burlington, Vt.
fast68plymouth
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 14,479
So. Burlington, Vt.
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First thing I’d do before getting excited about the 516’s is cc a couple chambers.
I’ve seen unmolested ones measure in the 84cc range, so it’s not like they’re a guaranteed big boost in cr. The closed chamber buys you nothing with quench on this build, so no benefit there.
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
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Re: Mild 440
[Re: lewtot184]
#2614288
01/29/19 09:54 PM
01/29/19 09:54 PM
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Joined: Jul 2008
Posts: 259 Khemi, Stygia
Mebsuta
enthusiast
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enthusiast
Joined: Jul 2008
Posts: 259
Khemi, Stygia
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I put a summit 6400 in a 9:1 compression 383 a couple of years ago and was surprised at how nice and quiet it ran along with good performance for a stocker 383. I like the 6401 in the 440 and if you have a decent one with good tappets and matching springs I would use it. Do you remember what the manifold vacuum at idle and cranking compression was with the 6400? Thanks.
68 Roadrunner. 383 4-spd. Beat up.
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Re: Mild 440
[Re: Mebsuta]
#2614492
01/30/19 11:17 AM
01/30/19 11:17 AM
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Joined: Jun 2008
Posts: 3,913 usa
lewtot184
master
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master
Joined: Jun 2008
Posts: 3,913
usa
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I put a summit 6400 in a 9:1 compression 383 a couple of years ago and was surprised at how nice and quiet it ran along with good performance for a stocker 383. I like the 6401 in the 440 and if you have a decent one with good tappets and matching springs I would use it. Do you remember what the manifold vacuum at idle and cranking compression was with the 6400? Thanks. didn't check the cylinder pressure but idle was 15".
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