470 Stroker pushrod length

470 Stroker pushrod length - 11/21/11 05:56 AM

Hello all,

I dont mean to open a can of worms regarding Stealth heads because I understand some here don't prefer them. However, many have used them with good results.

I am building a 470 Stroker, with a standard 400 block (no decking or milling done to the block or heads), Stealth CNC ported aluminum heads, and stealth rockers (1.6:1 ratio) and these valve springs:

http://www.hughesengines.com/Index/produ...mp;partid=10270

I am wondering if I can go with stock-length pushrods, or should I order custom length. Does anyone have this combination or one similar?

Thanks in advance

Posted By: AndyF

Re: 470 Stroker pushrod length - 11/21/11 06:00 AM

When using aftermarket parts you have to measure the pushrods. Aftermarket heads, cams, lifters and rocker arms can all change the pushrod length.

Posted By: 383man

Re: 470 Stroker pushrod length - 11/21/11 08:37 AM

I picked up an adjustable pushrod from Mancini when I was ordering parts. My 493 with Indy EZ heads had to have longer pushrods as the stock ones were to short. I ordered mine from Manton and had great service. Ron

Posted By: 70Cuda383

Re: 470 Stroker pushrod length - 11/21/11 03:49 PM

yup. just something as simple as changing to a new cam with higher lift... the base circle could be lower than a stock cam, giving more net lift on a similar sized lobe (gotta keep it small enough to fit through the cam tunnel!!) and that lower base circle means the lifter drops lower and you need either adjustable rockers or a longer pushrod to make up the difference.

Jegs/Mancini/etc. have adjustable threaded "checker" pushrods for about $10. pick one up, mock up your valve train, then measure how long of a rod you need and order a set. they aren't that expensive

Posted By: cjs69mope

Re: 470 Stroker pushrod length - 11/21/11 04:18 PM

Get your self a junk lifter and take it apart to rig it into a solid lifter for the checking process . Or buy a solid lifter because the measurements can be off if you use a spongy lifter.

Posted By: GomangoCuda

Re: 470 Stroker pushrod length - 11/21/11 05:48 PM

Quote:

Get your self a junk lifter and take it apart to rig it into a solid lifter for the checking process . Or buy a solid lifter because the measurements can be off if you use a spongy lifter.

Don't forget that solid lifters are not the same length from base to pushrod seat as hydraulic lifters. If you are using a hydro cam then the first suggestion in the above quote will work fine, the second one, not so good.

Posted By: Texas_Charger

Re: 470 Stroker pushrod length - 11/21/11 07:12 PM

Thanks guys, I plan on getting a pushrod length checker so I can figure out what length to get. Any idea on a ball park length I should order? (summit sells them in a variety of size ranges and I dont have the stock pushrods here to check)

Thanks

Posted By: cjs69mope

Re: 470 Stroker pushrod length - 11/21/11 07:25 PM

Quote:

Quote:

Get your self a junk lifter and take it apart to rig it into a solid lifter for the checking process . Or buy a solid lifter because the measurements can be off if you use a spongy lifter.

Don't forget that solid lifters are not the same length from base to pushrod seat as hydraulic lifters. If you are using a hydro cam then the first suggestion in the above quote will work fine, the second one, not so good.

That is correct!

I forgot about the solid lifter beening shorter .
The old Mopar performace book says B eng push rod length w stock rocker hyd. lifter 8.593 inches. w/adjustble rocker 8.375inches .
I have edelbrock heads on a 383 that has been decked so the piston is 6 thow in the hole and i use a 8.250 inch push rod with adjstble roller rockers with HYD cam . but all rockers are not the same so you need to measure .
hope this helps Cj.