Stroker size
+5
BBFTorino
rmcomprandy
dfree383
Dave De
nedceifus
9 posters
Stroker size

nedceifus- Posts : 56
Join date : 2019-07-31
Re: Stroker size
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.
Dave De- Posts : 675
Join date : 2011-05-27
Location : Highland, MI
Gregaust, Mark Miller and nedceifus like this post
Re: Stroker size
Bigger the stroke the more torque and power it will make.
dfree383- BBF CONTRIBUTOR
- Posts : 14588
Join date : 2009-07-09
Location : Home Wif Da Wife.....
QtrWarrior and nedceifus like this post
Re: Stroker size
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.
Gregaust, Mark Miller and nedceifus like this post
Re: Stroker size
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.
wickettoby1- Posts : 352
Join date : 2016-02-02
Location : SE Michigan
Mark Miller and nedceifus like this post
Re: Stroker size
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]
Last edited by Doxnoogle on August 8th 2022, 9:01 pm; edited 1 time in total
Doxnoogle- Posts : 20
Join date : 2022-07-30
Re: Stroker size
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.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..?
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.
Dave De- Posts : 675
Join date : 2011-05-27
Location : Highland, MI
Re: Stroker size
Dave De wrote: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.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..?
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?
Doxnoogle- Posts : 20
Join date : 2022-07-30
Re: Stroker size
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
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
Dave De- Posts : 675
Join date : 2011-05-27
Location : Highland, MI
Re: Stroker size
[/quote]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!!
Mark Miller- Posts : 1696
Join date : 2009-09-01
QtrWarrior likes this post
Re: Stroker size
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....
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?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!!
Doxnoogle- Posts : 20
Join date : 2022-07-30
Re: Stroker size
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....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?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!!
Re: Stroker size
I do believe that Scat was the source of the 2.5" journal 4.30" cranks......I'd contact them.
Mark Miller and Doxnoogle like this post

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