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Old 05-18-2004, 08:20 PM
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420 Windsor Stroker

Hey Guys,

Is there any drawbacks to stroking a 351 all the way to a 420, i mean the 4.170 stroker crank cost the same as one to stroke it to a 393.

What rods and pistons would you recommend with this stroke?

I've heard Keith Black 302 pistons would work well, as for Rods, there seems to be a debate on which length is best. SOme ppl say stock 351W rods, some say 300 I-6 rods which are 6" or so.

What type of cam would be suitable for this stroker to be a street motor occasionally taken to the track for fun. Torque on the low end would be desired and 6000RPM is plenty and im not sure how much I'd push the crank even if it supposed to be 30% stronger than OEM.

Here is the site i found the cranks for a good price on.
http://www.speedomotive.com/NEW%20CRANKS.HTM

Thanks in advance .

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Old 05-19-2004, 06:28 PM
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Re: 420 Windsor Stroker

Quote:
Originally posted by offroadin
Hey Guys,

Is there any drawbacks to stroking a 351 all the way to a 420, i mean the 4.170 stroker crank cost the same as one to stroke it to a 393.

What rods and pistons would you recommend with this stroke?

I've heard Keith Black 302 pistons would work well, as for Rods, there seems to be a debate on which length is best. SOme ppl say stock 351W rods, some say 300 I-6 rods which are 6" or so.

What type of cam would be suitable for this stroker to be a street motor occasionally taken to the track for fun. Torque on the low end would be desired and 6000RPM is plenty and im not sure how much I'd push the crank even if it supposed to be 30% stronger than OEM.

Here is the site i found the cranks for a good price on.
http://www.speedomotive.com/NEW%20CRANKS.HTM

Thanks in advance .

Brian at www.adperformance.com can tell you all you need to know and can offer you great prices on quality parts.....tell him 2wld4u sent ya...

Last edited by 2wld4u; 05-20-2004 at 12:02 PM.
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Old 05-19-2004, 08:06 PM
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That link doesn't work.
Thanks for the reply though.
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Old 05-20-2004, 07:34 AM
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Hi,

You can't use a 6"rod with a 4.170 stroke, its just too short. They will work for the 393 though. The 393 is popular because its cheap. Its the poor mans stoker because it can use stock rods and a 302 piston.

As a basic guideline the 408 is more street friendly, and the 420 or 427 (4.170stroke .030 over=427 std=420) is more for the strip. Although many people use the 4.170 stroke on the street, there are a few drawbacks. First is going to be wear. The 427's just dont tend to live as long probably due to having a rod ratio of only 1.48. Some of the 427's have problems burning oil because the compression height of the piston is so low the piston pin's are built into part of the oil ring lands. This can be avoided by using thinner rings and moving the top ring closer to the top of the piston, but again this may cause other wear or longevity problems.
One problem also is that this is a small block, and now your stroking into the size of big blocks. The 427 requires some serious heads and port work. Where 19cubic inch doesnt seem like a big difference. When you really think about it, 90% of after market heads are designed for a street 302, the 427 is 125ci bigger. For example, the 408 will make just as much power as a 427 if not more with a set of AFR165 heads. The 408 is already borderline for most out of the box heads, the 427 just needs more air. The 393 not only is cheaper to build but doesnt require as much investments in heads.
Dont get me wrong, there are lots of heads that work great on a 427stroke. You just need to know that the more you stroke the motor the more you need to spend on better heads.


Ben

Last edited by brainsboy; 05-20-2004 at 07:56 AM.
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Old 05-20-2004, 12:04 PM
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That link doesn't work.
Thanks for the reply though.



it works now, sorry, i didnt add a "N" in performance...lol...my spelling sucks...
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Old 05-20-2004, 03:12 PM
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Thanks for the help and info guys.
I guess a 393 would be the way to go for a street moror then. I was a little concerned about the rod ratio.
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