4.2 Vs 4.0 rod stroker builds

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AIbandit
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4.2 Vs 4.0 rod stroker builds

Post by AIbandit »

I'm a little curious how you 4.0 rod guys justify the cost of using 4.0 rods vs using 4.2 rods.

Correct me if I'm wrong but you get about a 10 hp gain. With the additional cost of about 500$ (kieth black pistons and reconditioning your own rods. vs purchasing PAW stage II rods and Speed pro pistons.)
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Re: 4.2 Vs 4.0 rod stroker builds

Post by amcinstaller »

search some old threads and youll see that this topic has been beaten into the ground, and usually turns into an 8-10 page thread right quick. sometimes it even gets heated.
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Re: 4.2 Vs 4.0 rod stroker builds

Post by Cheromaniac »

AIbandit wrote:I'm a little curious how you 4.0 rod guys justify the cost of using 4.0 rods vs using 4.2 rods.

Correct me if I'm wrong but you get about a 10 hp gain. With the additional cost of about 500$ (kieth black pistons and reconditioning your own rods. vs purchasing PAW stage II rods and Speed pro pistons.)
I know where you're coming from having posted in this thread http://www.naxja.org/forum/showthread.php?t=1022064
. The extra 10-15hp or so that you're referring to isn't from using the 4.0 rods with KB944 pistons but rather from using a performance cam instead of the stocker. The higher cost also comes from the performance cam with upgraded valve springs/retainers/locks in addition to the KB pistons if you're making a comparison to my "poor man's" stroker.
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AIbandit
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Re: 4.2 Vs 4.0 rod stroker builds

Post by AIbandit »

Cheromaniac wrote: I know where you're coming from having posted in this thread http://www.naxja.org/forum/showthread.php?t=1022064
. The extra 10-15hp or so that you're referring to isn't from using the 4.0 rods with KB944 pistons but rather from using a performance cam instead of the stocker. The higher cost also comes from the performance cam with upgraded valve springs/retainers/locks in addition to the KB pistons if you're making a comparison to my "poor man's" stroker.
Thanks that clarifies alot! I thought it was that little bit more displacement.
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