427 dreams
Hotshot
Joined: May 2003
Posts: 11,141
Likes: 25
From: south louisiana
But those would have been the weaker 3 speeds, not the 3.03 the OP has.
Hotshot
Joined: Jul 2005
Posts: 13,834
Likes: 25
From: Middle Tn.
I also had a 57 Chevy with a 394 olds punched to 406 with a slant pan hydro tranny. Could blow *** ends at will at any speed under 50.
Cargo Master
Joined: Dec 2015
Posts: 2,543
Likes: 322
From: Harned, Ky
That's true, transmissions wasn't the only things I broke, in the quest for power and speed anything connected to the crankshaft is subject to failure, even the crankshaft.
Hotshot
Joined: May 2003
Posts: 11,141
Likes: 25
From: south louisiana
Back when I did a V8 swap in an 89 Ranger everyone said the 7.5 rear wouldn't hold up. It lasted a couple years before it started leaking gear oil out of the right side brake drum. Swapped in an Explorer 8.8. The stock tiny u joint driveshaft lasted even longer until I tried a dry burnout on a rough asphalt parking lot, and dumping the clutch, dropping the hammer on the Toploader 4 speed. The 275/60's bit too hard and the middle portion of the shaft snapped. (the solid splined portion) The tiny U joints held, (amazingly)
Logistics Pro
Joined: May 2008
Posts: 3,670
Likes: 370
From: PHX AZ
I have done a bunch of 427's. Current one is 4.25 x 4.25 (482) with Dual Quad EFI, Home built headers, solid street roller
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Hotshot
Joined: May 2003
Posts: 11,141
Likes: 25
From: south louisiana
Logistics Pro
Joined: Feb 2011
Posts: 3,522
Likes: 11
From: Townsend, MT
If you want to build any engine and are looking for advice on parts, the first thing you need to do is establish a budget. Whether it be $2K or $20K, you need to tell us what you have to spend. Cubic inches might not be the most cost effective "HP per dollar".
The second thing to do is throw said budget out the window...
Hotshot
Joined: May 2003
Posts: 11,141
Likes: 25
From: south louisiana
Drug a 20,000 pound tractor home last year on a 6,000 pound trailer behind a 7,000 pound pickup over Homestake pass and Cardwell hill with a lowly 410 under the hood. Grossed just shy of 34K. Need to haul a 9K pound slab of concrete? Why not...
If you want to build any engine and are looking for advice on parts, the first thing you need to do is establish a budget. Whether it be $2K or $20K, you need to tell us what you have to spend. Cubic inches might not be the most cost effective "HP per dollar".
The second thing to do is throw said budget out the window...
If you want to build any engine and are looking for advice on parts, the first thing you need to do is establish a budget. Whether it be $2K or $20K, you need to tell us what you have to spend. Cubic inches might not be the most cost effective "HP per dollar".
The second thing to do is throw said budget out the window...
Posting Guru
Joined: Jul 2003
Posts: 1,287
Likes: 3
Bottom line for towing is torque. Our 767 hp Fe has 713 ft. lbs. torque. Our 2012 6.7 powerstroke diesel has 800 ft. lbs. of torque. No competition. Diesels win hands down.
Sure you can pull about anything with a FE, with the proper gearing, even a 360 ci. FE, but it is going to strain and moan and groan with heavy loads. If you are happy pulling a load up a 6 or 8 degree grade, watch for snails passing you on the left.
Sure you can pull about anything with a FE, with the proper gearing, even a 360 ci. FE, but it is going to strain and moan and groan with heavy loads. If you are happy pulling a load up a 6 or 8 degree grade, watch for snails passing you on the left.
Hotshot
Joined: May 2003
Posts: 11,141
Likes: 25
From: south louisiana
Bottom line for towing is torque. Our 767 hp Fe has 713 ft. lbs. torque. Our 2012 6.7 powerstroke diesel has 800 ft. lbs. of torque. No competition. Diesels win hands down.
Sure you can pull about anything with a FE, with the proper gearing, even a 360 ci. FE, but it is going to strain and moan and groan with heavy loads. If you are happy pulling a load up a 6 or 8 degree grade, watch for snails passing you on the left.
Sure you can pull about anything with a FE, with the proper gearing, even a 360 ci. FE, but it is going to strain and moan and groan with heavy loads. If you are happy pulling a load up a 6 or 8 degree grade, watch for snails passing you on the left.
Posting Guru
Joined: Jul 2003
Posts: 1,287
Likes: 3
Our 511ci engine dyno sheet from Keith Craft
rpm torque Hp
5,000 713.0 678.8
5,100 708.8 688.2
5,200 704.2 697.2
5,300 699.7 706.1
5,400 695.1 714.6
5,500 690.2 722.8
5,600 685.6 731.0
5,700 680.4 738.4
5,800 674.2 744.6
5,900 667.4 749.7
6,000 659.9 753.9
6,100 652.2 757.5
6,200 644.6 761.0
6,300 636.4 763.4
6,400 627.7 764.9
6,500 619.7 767.0
6,600 610.8 767.5
6,700 600.7 766.4
The dyno test was listed from 5,000 rpm to 6,700 rpm. So I am assuming that our engine made 700 ft. lbs torque around 4,900 rpm.
Of course this is a drag strip engine and not a street engine. Not meant to pull anything.
Our 6.7 psd engine makes 800 ft.lbs. torque at below 2000 rpm. It is made for pulling what ever you want to pull.
rpm torque Hp
5,000 713.0 678.8
5,100 708.8 688.2
5,200 704.2 697.2
5,300 699.7 706.1
5,400 695.1 714.6
5,500 690.2 722.8
5,600 685.6 731.0
5,700 680.4 738.4
5,800 674.2 744.6
5,900 667.4 749.7
6,000 659.9 753.9
6,100 652.2 757.5
6,200 644.6 761.0
6,300 636.4 763.4
6,400 627.7 764.9
6,500 619.7 767.0
6,600 610.8 767.5
6,700 600.7 766.4
The dyno test was listed from 5,000 rpm to 6,700 rpm. So I am assuming that our engine made 700 ft. lbs torque around 4,900 rpm.
Of course this is a drag strip engine and not a street engine. Not meant to pull anything.
Our 6.7 psd engine makes 800 ft.lbs. torque at below 2000 rpm. It is made for pulling what ever you want to pull.