Stroker size

nedceifus April 4th 2022, 10:23 pm

What stroker sizes are better for different applications? I’m just getting my 460 together but really need to upgrade to a forged piston, I’m going to put some NOS to it next summer. Seems like if I’m going to invest in a good set of pistons I may as well just buy a stroker rotating assembly. This is going in a 64 Ford. Street/Strip, heavy on the strip. Victor, 1000cfm 4150, 700 lift solid roller, SCJ heads, pump gas, 200 shot. I want to be able to beat the piss out if it.

Dave De April 5th 2022, 10:58 pm

If its a factory block... going 4.3" stroke is friendly. D9TE blocks have longer bores where they are the best for using 4.5" stroke but even with them I think 4.3" is the practical choice for a street/strip package.

dfree383 April 7th 2022, 6:27 am

Bigger the stroke the more torque and power it will make.

rmcomprandy April 7th 2022, 10:11 am

Dave De wrote:If its a factory block... going 4.3" stroke is friendly. D9TE blocks have longer bores where they are the best for using 4.5" stroke but even with them I think 4.3" is the practical choice for a street/strip package.

I agree, especially when longevity of ring life is expected.
A 4.3" stroke with a 6.605" rod or a 4.5 stroke with a 6.7" rod is marginal for decent ring life even in a D9 block..
Keep the piston in the bore not out of the bottom.

If it is a high maintenance racing engine then it probably won't matter.

BBFTorino April 8th 2022, 1:57 am

The biggest that you can afford.

wickettoby1 April 8th 2022, 9:50 am

If you’re ‘64 is a “full figured Gal” she’s gonna be weighing in at 4K plus (unless she’s been to fat camp) so lots of torque should be high on the priority list. A 521 can make the same power as a 545 it will just take a few more RPM’s to do it. Personally I wouldn’t be afraid of using either one but I’d definitely spring for all forged internals.

Doxnoogle August 8th 2022, 2:53 am

rmcomprandy wrote:

A 4.3" stroke with a 6.605" rod

Dont mean to hijack, but thats a thing? Every 521 ive been able to find is a 6.7 or 6.8 rod with 2.2 journals, would assume the 4.3 crank would need to use 2.5 journals for the 6.605 rods..?[/quote]

Dave De August 8th 2022, 2:59 pm

Doxnoogle wrote:
rmcomprandy wrote:
Dave De wrote:
A 4.3" stroke with a 6.605" rod

Dont mean to hijack, but thats a thing? Every 521 ive been able to find is a 6.7 or 6.8 rod with 2.2 journals, would assume the 4.3 crank would need to use 2.5 journals for the 6.605 rods..?

Mr. Doxnoodle altered that thread to make it look like I said "A 4.3" stroke with a 6.605" rod" I did not. That is ridiculous.

If anyone thought that I was suggesting 6.6 rods I was not. I agree that 6.7 or 6.8 rods must be used with a 2.2 rod journal. If factory blocks are used a 6.8 rod is best but a 6.7 rod will be okay with a D9 block. Street use is more important to have the pin higher in the bore thus a 6.8 rod is ideal.

Going further to make a point. The weakest link in a BBF is the rods. If you are are looking for more power on a build and who isnt. Using a 4.3 or 4.5 or 4.6 crank with 6.7 or 6.8 BBC rods with a 2.20 crank pin and .990 piston pin is the only way to roll. If there is something better let me know.

Doxnoogle August 8th 2022, 9:01 pm

Dave De wrote:
Doxnoogle wrote:
rmcomprandy wrote:
Dave De wrote:
A 4.3" stroke with a 6.605" rod

Dont mean to hijack, but thats a thing? Every 521 ive been able to find is a 6.7 or 6.8 rod with 2.2 journals, would assume the 4.3 crank would need to use 2.5 journals for the 6.605 rods..?
Mr. Doxnoodle altered that thread to make it look like I said "A 4.3" stroke with a 6.605" rod" I did not. That is ridiculous.

If anyone thought that I was suggesting 6.6 rods I was not. I agree that 6.7 or 6.8 rods must be used with a 2.2 rod journal. If factory blocks are used a 6.8 rod is best but a 6.7 rod will be okay with a D9 block. Street use is more important to have the pin higher in the bore thus a 6.8 rod is ideal.

Going further to make a point. The weakest link in a BBF is the rods. If you are are looking for more power on a build and who isnt. Using a 4.3 or 4.5 or 4.6 crank with 6.7 or 6.8 BBC rods with a 2.20 crank pin and .990 piston pin is the only way to roll. If there is something better let me know.

Wtf are you talking about? Three posts up from mine rmcomprandy mentioned using a 6.605 rod with a 4.3" stroke. Forgive me that i missed one of the quote inserts. Jesus you guys next level touchy around here, sweet burn spelling my name wrong, do i have to throw a tantrum now to fit in?

Dave De August 8th 2022, 9:35 pm

Hey Doxnoogle,
I accept your apology for scrambling that quote even though you say that you missed something. When you take my quote and alter it down to a string that doesn't make sense "A 4.3" stroke with a 6.605" rod" it makes me look like a fool. It certainly looked intentional but if it wasn't I'll take your word for it. Please be careful. And yes I intentionally said noodle but wont do it again going forward.
Carry on,
Dave

Mark Miller August 8th 2022, 11:02 pm

Doxnoogle wrote:
rmcomprandy wrote:

A 4.3" stroke with a 6.605" rod

Dont mean to hijack, but thats a thing? Every 521 ive been able to find is a 6.7 or 6.8 rod with 2.2 journals, would assume the 4.3 crank would need to use 2.5 journals for the 6.605 rods..?

[/quote]

Ford Racing Sold a Stroker Kit back in 2002 or so with a 4.3 stroke Crank and with the 6.605 rods!!

Doxnoogle Yesterday at 9:12 am

Dave De wrote:Hey Doxnoogle,
I accept your apology for scrambling that quote even though you say that you missed something. When you take my quote and alter it down to a string that doesn't make sense "A 4.3" stroke with a 6.605" rod" it makes me look like a fool. It certainly looked intentional but if it wasn't I'll take your word for it. Please be careful. And yes I intentionally said noodle but wont do it again going forward.
Carry on,
Dave

Dude, its not even your quote....

Mark Miller wrote:
Doxnoogle wrote:
rmcomprandy wrote:

A 4.3" stroke with a 6.605" rod

Dont mean to hijack, but thats a thing? Every 521 ive been able to find is a 6.7 or 6.8 rod with 2.2 journals, would assume the 4.3 crank would need to use 2.5 journals for the 6.605 rods..?

Ford Racing Sold a Stroker Kit back in 2002 or so with a 4.3 stroke Crank and with the 6.605 rods!!

Ok, so that was the old FRRP 514 kit that used stock length rods. Ive heard that someone bought all the leftover cranks when ford switched to the aftermarket rod for the crate. Anyone know the contact?

Lem Evans Yesterday at 11:53 am

Doxnoogle wrote:
Dave De wrote:Hey Doxnoogle,
I accept your apology for scrambling that quote even though you say that you missed something. When you take my quote and alter it down to a string that doesn't make sense "A 4.3" stroke with a 6.605" rod" it makes me look like a fool. It certainly looked intentional but if it wasn't I'll take your word for it. Please be careful. And yes I intentionally said noodle but wont do it again going forward.
Carry on,
Dave

Dude, its not even your quote....

Mark Miller wrote:
Doxnoogle wrote:
rmcomprandy wrote:

A 4.3" stroke with a 6.605" rod

Dont mean to hijack, but thats a thing? Every 521 ive been able to find is a 6.7 or 6.8 rod with 2.2 journals, would assume the 4.3 crank would need to use 2.5 journals for the 6.605 rods..?

I do believe that Scat was the source of the 2.5" journal 4.30" cranks......I'd contact them.

Ford Racing Sold a Stroker Kit back in 2002 or so with a 4.3 stroke Crank and with the 6.605 rods!!
Ok, so that was the old FRRP 514 kit that used stock length rods. Ive heard that someone bought all the leftover cranks when ford switched to the aftermarket rod for the crate. Anyone know the contact?

Lem Evans Yesterday at 11:54 am

I do believe that Scat was the source of the 2.5" journal 4.30" cranks......I'd contact them.

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