428 vs. 390
Post Fiend
Joined: Jan 2003
Posts: 8,600
Likes: 4
From: Iowa
Head flow, valve size, manifold differences, camming differences, etc. Like I said, all other things being equal. With two different motor families, things are never equal. Which of course, negates both of our examples. 
I modeled both motors (428 and 429) in desktop dyno with equal parts (in theory, unbuildable of course) and the curves are nearly identical, with the slight advantage to the 429, by 4 hp and 1 ft-lb of torque.
It's displacement. Stroker cranks just give you more. Nothing magical about the "leverage" or anything like that.
I modeled both motors (428 and 429) in desktop dyno with equal parts (in theory, unbuildable of course) and the curves are nearly identical, with the slight advantage to the 429, by 4 hp and 1 ft-lb of torque.
It's displacement. Stroker cranks just give you more. Nothing magical about the "leverage" or anything like that.
Senior User
Joined: Jun 2006
Posts: 231
Likes: 0
From: Merrill, WI
Originally Posted by rusty70f100
It's displacement. Stroker cranks just give you more. Nothing magical about the "leverage" or anything like that.
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Post Fiend
Joined: Dec 2003
Posts: 6,658
Likes: 4
From: "Islander"
Look at the torque numbers of Olds and Chrysler motors in the 60's with big bores short strokes, high numbers at fairly low rpm's but they had high compression and good fuel back then. Today we have to make torque with crappy fuel.
Anytime someone mentions a 4x4 that's heavy, operates at low rpm's for off road or a truck loaded for towing I recommend a 410 or 428 build with the proper cam and equipment.
If there's such a thing as having too much torque let me know plus use less throttle.
Anytime someone mentions a 4x4 that's heavy, operates at low rpm's for off road or a truck loaded for towing I recommend a 410 or 428 build with the proper cam and equipment.
If there's such a thing as having too much torque let me know plus use less throttle.
Post Fiend
Joined: Jan 2003
Posts: 8,600
Likes: 4
From: Iowa
360 rods are longer. There were two length rods used on FE's and FT's. A short rod, and a long rod.
Short rod = 6.488"
Long rod = 6.54"
Long rod was used on 332, 352, 360, and some 330's.
Short rod was used on everything else.
Short rod = 6.488"
Long rod = 6.54"
Long rod was used on 332, 352, 360, and some 330's.
Short rod was used on everything else.
Junior User
Joined: Nov 2006
Posts: 89
Likes: 0
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Junior User
Joined: Nov 2006
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look for a fairlane wagon, I got mine out of a crashed thunderbird.
Also (hind site for me) check with your local machine shop. The one by me in Everett WA. has two 428's with cranks and rods sitting on the shop floor. Ready to re-build. Lots of people have big dreams and no $$ to pay the machinest when there block/crank are done. Also Craigs-list has a lot of stuff on it. Or just pony up and get an aftermarket block/crank/rods/heads!!
Also (hind site for me) check with your local machine shop. The one by me in Everett WA. has two 428's with cranks and rods sitting on the shop floor. Ready to re-build. Lots of people have big dreams and no $$ to pay the machinest when there block/crank are done. Also Craigs-list has a lot of stuff on it. Or just pony up and get an aftermarket block/crank/rods/heads!!
Hotshot
Joined: May 2003
Posts: 11,141
Likes: 25
From: south louisiana
Originally Posted by Beemer Nut
Look at the torque numbers of Olds and Chrysler motors in the 60's with big bores short strokes, high numbers at fairly low rpm's but they had high compression and good fuel back then. Today we have to make torque with crappy fuel.
Anytime someone mentions a 4x4 that's heavy, operates at low rpm's for off road or a truck loaded for towing I recommend a 410 or 428 build with the proper cam and equipment.
If there's such a thing as having too much torque let me know plus use less throttle.
Anytime someone mentions a 4x4 that's heavy, operates at low rpm's for off road or a truck loaded for towing I recommend a 410 or 428 build with the proper cam and equipment.
If there's such a thing as having too much torque let me know plus use less throttle.
there) it was a torque monster. My Moms 70 Delta 88 4 dr hardtop would smoke em on demand. 
Hotshot
Joined: May 2003
Posts: 11,141
Likes: 25
From: south louisiana
Why would you want to? The 352/360 rods are visibly weaker. Just compare the two side by side, you'lll see what I mean. The miniscule difference in length isn't enough to justify that over the strength loss.