410 Build Questions
#16
02-25-2013, 01:55 PM
360 stroke = 3.50, 390 rod = 6.49, 390 car piston = 1.778 compression height.
1.75 + 6.49 + 1.778 = 10.018
Deck is 10.17, so your piston is .152 down the hole.
Even if you figure the 390 4v flat top piston without the small volume for the valve reliefs, you get a 7.569:1 compression ratio. (.040 gasket, 72 cc combustion chamber)
This is why they use the 390 piston, either flavor, on the 352/360 rod, which puts it up the hole a bit. With the same info as above and a 6.540 rod, you get a piston "only" .102 down the hole and a compression ratio of 8.248:1, approximatley the advertised CR for a 360.
#18
02-26-2013, 09:02 AM
So im wanting to find a 360 FE motor and build it into a street eating 410 for my 73. I'm not going to rip out my 390 that is currently sitting in the engine bay because I need a driver. I know I will need a 428 crank for the build and I have found that Autozone sells refurbs (for alot less than any stroker crank). I was pondering just porting and blending and milling (ALOT OF MILLING) and rebuilding the heads myself. Pairing it with a biggish cam, a dual plane aluminum intake, and headers. Personally I would happy pumping out 400 horsepower. I would like to be able to run on 87, but 91 is acceptable. Can I expect 400 from this combo or am I shooting wayyyy to high?
smoothing the runners, and opening up the cylinder heads and he came back
with he tried that on some GT heads and he actually lost horse power and torque when doing a head job, He thinks the FE mills
need back pressure to keep the HP/Torque up on them
??/
Last edited by stevejohnson48; 02-26-2013 at 09:04 AM. Reason: miss spilled word
#19
02-26-2013, 09:52 AM
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// I got a friend that a Ford FE nut literately, He owns his own 7 bay garage and races Fords, I have a 390 FE in a inboard and was asking him about port matching, smoothing the runners, and opening up the cylinder heads and he came back with he tried that on some GT heads and he actually lost horse power and torque when doing a head job, He thinks the FE mills need back pressure to keep the HP/Torque up on them ??/
smoothing the runners, and opening up the cylinder heads and he came back with he tried that on some GT heads and he actually lost horse power and torque when doing a head job, He thinks the FE mills need back pressure to keep the HP/Torque up on them ??/
#21
03-24-2013, 11:02 PM
so you might want to bump it down a couple more on the high side say 9-4 to 1 that's still using high octane??/
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