Re: 521 progress
[Re: AndyF]
#3192378
11/21/23 10:44 AM
11/21/23 10:44 AM
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Joined: Jan 2003
Posts: 9,872 Weddington, N.C.
Streetwize
master
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master
Joined: Jan 2003
Posts: 9,872
Weddington, N.C.
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What is the Bore and stroke of that 521?
With fords especially big ports want high compression and a big cam....and without both you can't have either.... but it'll still run well with lower compression as long as the cam is on the small side too.
Last edited by Streetwize; 11/21/23 10:47 AM.
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Re: 521 progress
[Re: AndyF]
#3192503
11/21/23 07:29 PM
11/21/23 07:29 PM
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Joined: Jan 2003
Posts: 8,163 Plymouth, MI
Blusmbl
master
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master
Joined: Jan 2003
Posts: 8,163
Plymouth, MI
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That'll be a fun build, and it is impressive how big you can go with the later model blocks, I think it's something like 557" without too much trouble.. Like you said, they put them in everything- 429's and 460's in vans, pickups, the medium duty F600/700, you name it, all through the 90's.
'18 Ford Raptor, random motorcycles, 1968 Plymouth Fury III - 11.37 @ 118
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Re: 521 progress
[Re: AndyF]
#3192512
11/21/23 08:24 PM
11/21/23 08:24 PM
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Joined: Jan 2003
Posts: 9,986 Frostbitefalls MN (Rocky&Bullw...
gregsdart
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master
Joined: Jan 2003
Posts: 9,986
Frostbitefalls MN (Rocky&Bullw...
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4.390 bore x 4.300 stroke. I'm not too worried about the combination. We're using the parts that Kaase recommends and he has built a ton of these engines. Once we get some dyno time on it we'll start trying different things but the first build will follow the Kaase plan. The cam is his "small" one since we have a smaller engine, but the duration at 0.400 is 91 degrees so the intake valves are open more than 0.700 for a quarter rotation of the engine. Andy, this 460 motor has interested me for years. My very first thought was a fabricated tunnelram and twin throttle bodies, running e85 would make a dynomite combo, especially if the 557 size is not too tough to do. A local racer / engine builder runs 598 cube 385 series Fords, dialing 7.80 in the 1/4 on gasoline. One of my last outings i was unlucky enough to race him, and he went 7.80 on a 7.80 dial.
8..603 156 mph best, 2905 lbs 549, indy 572-13, alky
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Re: 521 progress
[Re: gregsdart]
#3192579
11/22/23 10:32 AM
11/22/23 10:32 AM
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Joined: Aug 2008
Posts: 4,066 Mo.
racerx
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master
Joined: Aug 2008
Posts: 4,066
Mo.
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On Kasse web site, possible 659 cu in combo, 4.70 bore 4.75 stroke. Is that current pricing?
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Re: 521 progress
[Re: racerx]
#3192704
11/22/23 07:25 PM
11/22/23 07:25 PM
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Joined: Jan 2003
Posts: 8,163 Plymouth, MI
Blusmbl
master
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master
Joined: Jan 2003
Posts: 8,163
Plymouth, MI
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On Kasse web site, possible 659 cu in combo, 4.70 bore 4.75 stroke. Is that current pricing? Looks like yes. A Ford Performance 460X block at Summit is $3300 as well, there are multiple BBF cast iron options at the $3k-ish price point. There is no reason a Callies MP cast iron block is $6500 (hey, it's on sale this week for $6000 at Mancini's!).
'18 Ford Raptor, random motorcycles, 1968 Plymouth Fury III - 11.37 @ 118
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Re: 521 progress
[Re: Blusmbl]
#3192781
11/23/23 02:23 AM
11/23/23 02:23 AM
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Joined: May 2019
Posts: 712 Lake Villa Il
INTMD8
super stock
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super stock
Joined: May 2019
Posts: 712
Lake Villa Il
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Looks bad ass! I don't know anything about the intake manifolds but if you think what you have will hold it back, maybe send it to John Marcella? I've not needed his services so can't speak from experience but his work from photos looks truly amazing.
69 Charger. 438ci Gen2 hemi. Flex fuel. Holley HP efi. 650rwhp @7250 510rwtq @5700
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Re: 521 progress
[Re: 451Mopar]
#3194101
11/29/23 09:41 AM
11/29/23 09:41 AM
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Joined: Jan 2003
Posts: 8,163 Plymouth, MI
Blusmbl
master
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master
Joined: Jan 2003
Posts: 8,163
Plymouth, MI
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I watch way too much youtube, but Mike Finnegan had John Kaase rebuild the Hemi in his '55 Chevy and he did not have good luck with them at all. Some of that could've been Kaase not being familiar with hemis though.
'18 Ford Raptor, random motorcycles, 1968 Plymouth Fury III - 11.37 @ 118
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Re: 521 progress
[Re: AndyF]
#3194125
11/29/23 11:18 AM
11/29/23 11:18 AM
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Joined: Jan 2003
Posts: 14,493 So. Burlington, Vt.
fast68plymouth
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 14,493
So. Burlington, Vt.
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What installed height are the springs set up at?
What’s the available installed height?
Is the vehicle the engine is going in destined for some street duty?
Personally, I don’t see a set of Manley 221443’s being the hot set up for nearly .800 lift with typical BB valvetrain weight components………. Unless the cam uses very tame ramps, and can function properly with whatever spring force you’d end up with by installing them at 1.250”+ net lift.
There are several more spring choices that facilitate .800-ish lift if you can get the IH closer to 2.00”.
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
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