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Author Topic:   Stroking a 460
SG236
Gearhead

Posts: 416
From: Jasper, TN, USA
Registered: Dec 2000

posted 07-29-2001 10:10 PM     Click Here to See the Profile for SG236   Click Here to Email SG236     Edit/Delete Message   Reply w/Quote
Looking at the stroker 460. If I use a 6.8 rod what will the crank have to be turned to?


Thanks for the info Jay!

------------------
Russ Hood
70s Maverick S/Pro
https://mustangsandmore.com/ubb/SG236.html

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S/Q 2204
Gearhead

Posts: 103
From: Ozark, AL(again after a year of being deployed)
Registered: Feb 2001

posted 07-29-2001 11:22 PM     Click Here to See the Profile for S/Q 2204   Click Here to Email S/Q 2204     Edit/Delete Message   Reply w/Quote
SG 236,
You can do the crank pin however you feel good about. The proper placement of the piston pin will make it all click. You can specify it's location when you order pistons. However, 4.15 stroke, 2.2 crank pin with 6.8 rod will use a common piston that should keep cost down some.
Good luck,
Mark J.

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jkilroy
Gearhead

Posts: 1808
From: Vicksburg, MS
Registered: Dec 99

posted 07-30-2001 08:34 AM     Click Here to See the Profile for jkilroy   Click Here to Email jkilroy     Edit/Delete Message   Reply w/Quote
The Ross pistons I picked up use a 6.8 rod, BBC size, on a 4.5 stroke crank. Works out to 545ci, I better invest in tires and oil companies quick.

------------------
Jay Kilroy
68' Fastback GT 390
"No such thing as a cam thats too big"

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SG236
Gearhead

Posts: 416
From: Jasper, TN, USA
Registered: Dec 2000

posted 07-30-2001 09:01 AM     Click Here to See the Profile for SG236   Click Here to Email SG236     Edit/Delete Message   Reply w/Quote
SRP (JE) has a piston in the Herbert mag that is for the 4.15 X 4.44 with the chev pin. I'm gonna go with Eagle rods.

Do I need to fill the block up on the bottom for that kind of bore? Already had the block sonic checked and it is ok. I'm gonna turn this motor around 6200-6400 so I think I should be ok.

Thanks Mark and Jay for your help!

------------------
Russ Hood
70s Maverick S/Pro
https://mustangsandmore.com/ubb/SG236.html

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jkilroy
Gearhead

Posts: 1808
From: Vicksburg, MS
Registered: Dec 99

posted 07-30-2001 12:30 PM     Click Here to See the Profile for jkilroy   Click Here to Email jkilroy     Edit/Delete Message   Reply w/Quote
Even though the idea of a that large an overbore is a little scary, I have been told that almost all of the 460 blocks have the meat to support it. Hell, proabably makes the block 20 lbs lighter.

------------------
Jay Kilroy
68' Fastback GT 390
"No such thing as a cam thats too big"

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Mike_R
Gearhead

Posts: 176
From: Indianapolis, IN 46237
Registered: Feb 2001

posted 07-30-2001 01:23 PM     Click Here to See the Profile for Mike_R   Click Here to Email Mike_R     Edit/Delete Message   Reply w/Quote
Usually .080" over shouldn't be a problem. I've seen lots of D1VE blocks bored .080" over with no filler. If you had it sonic tested and there is no major core shift it should be okay.

The 4.150" stroke, 4.44" bore is sort of the classic "514" combo. The 4.15" is the maximum theoretical amount a stock 460 crank can be offset ground with a 2.200" pin. The actual stroke is normally 4.140" because the crank grinder has to have little extra to work with. The Eagle cast steel cranks are also 4.140". That would give you a 512 cubic incher.

In that case your pin height on the piston should be in the 1.42-1.45" range.

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