Pushrod length calculator inside!
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From: Lexington, Ky
Pushrod length calculator inside! First measure your stock cam's base circe diameter. This is the widest point on the intake and exhaust lobes. Punch this into the stock cam base circle diameter.
Repeat this for your new cam's intake and exhaust lobes in the labelled cells.
Finally, if you milled your heads put in how much they were milled, i.e. 0.010 milled.
This will spit out the length of the pushrods required for your new cam and/or heads set-up. Thanks to Allcammedup for getting me straight on the math <img border="0" alt="[cheers]" title="" src="graemlins/gr_cheers.gif" />
Here ya' go: http://home.insightbb.com/~l.proctor1/p-rod.xls
Enjoy!
This assumes stock spring installed height for an LS1. The stock pushrod size is base on an LS1 stock pushrod.
<small>[ October 29, 2002, 03:29 PM: Message edited by: NastyC5 ]</small>
Repeat this for your new cam's intake and exhaust lobes in the labelled cells.
Finally, if you milled your heads put in how much they were milled, i.e. 0.010 milled.
This will spit out the length of the pushrods required for your new cam and/or heads set-up. Thanks to Allcammedup for getting me straight on the math <img border="0" alt="[cheers]" title="" src="graemlins/gr_cheers.gif" />
Here ya' go: http://home.insightbb.com/~l.proctor1/p-rod.xls
Enjoy!
This assumes stock spring installed height for an LS1. The stock pushrod size is base on an LS1 stock pushrod.
<small>[ October 29, 2002, 03:29 PM: Message edited by: NastyC5 ]</small>
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From: SW Florida
Re: Pushrod length calculator inside! Neat! <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />
Oh BTW, I think someone who has access to a set of calipers should go measure a stock pushrod and see if it is actually 7.400 inches.
I'm over in Korea right now, so, no help from me.
<small>[ October 29, 2002, 08:09 PM: Message edited by: Kimchee and Rice ]</small>
Oh BTW, I think someone who has access to a set of calipers should go measure a stock pushrod and see if it is actually 7.400 inches.
I'm over in Korea right now, so, no help from me.
<small>[ October 29, 2002, 08:09 PM: Message edited by: Kimchee and Rice ]</small>
Thread Starter
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From: Lexington, Ky
Re: Pushrod length calculator inside! Kimchee, a stock p-rod is not 7.400". It's quite a bit smaller <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" /> . I measured one to be 7.375"
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From: SW Florida
Re: Pushrod length calculator inside! Well, that puts a monkey wrench in everything I wrote in my thread!
Where the hell did this 7.40" number come from anywhere? We have allways been told the stock GM rod length is 7.40" by all the rod manufactures and sellers.
Now, I wonder if the aftermarket hardened 7.40" rods everyone advertises as stock length are really 7.40" or actually shorter!
Jeese... <img border="0" title="" alt="[Confused]" src="images/icons/confused.gif" />
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<small>[ October 30, 2002, 03:29 PM: Message edited by: Kimchee and Rice ]</small>
Where the hell did this 7.40" number come from anywhere? We have allways been told the stock GM rod length is 7.40" by all the rod manufactures and sellers.
Now, I wonder if the aftermarket hardened 7.40" rods everyone advertises as stock length are really 7.40" or actually shorter!
Jeese... <img border="0" title="" alt="[Confused]" src="images/icons/confused.gif" />
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<small>[ October 30, 2002, 03:29 PM: Message edited by: Kimchee and Rice ]</small>
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From: SW Florida
Re: Pushrod length calculator inside! Steve...
The reason I said this is because NastyC5 measured one to be 7.375"
Thats .025" (25 thousands shorter than 7.40)(alot)
Steve, your 7.395" measurment is close (5 thousands)
The reason I said this is because NastyC5 measured one to be 7.375"
Thats .025" (25 thousands shorter than 7.40)(alot)
Steve, your 7.395" measurment is close (5 thousands)
