correct pushrod length

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Apr 6, 2011 | 11:17 AM

bill925

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Instructor

Joined: Dec 2007

Posts: 117

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From: Callaway Florida

correct pushrod length

is there anyway to tell what length pushrods you need without going through and installing the roller rockers? just trying to see if i gave you all the specs on the heads and cam and knowing im using ls7 lifters...could anyone tell me what pushrods i need?
heads:
LT1 LE2 heads consist of :

Manley 2.00/1.56 6000 series valves
Patriot Gold Extreme springs (155 lbs seat and 400 lbs open)
Steel retainers and locks
205 cc intake port
milling, cleaning and assembly
flow about 275/190 CFM

cam intake exhaust
duration at .050 236 244
lobe lift .3700 .3700
seperation 112 op-cl op-cl
timing events .050 9 47 57 7
duration at .006 288 296
gross valve lift .555 .555
valve lash(hot) .000 .000
degree intake lobe to 109

Apr 6, 2011 | 11:20 AM

cv67

Team Owner

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From: altered state

St. Jude Donor '05

Youre going to have to get a pushrod length tool and 1 rocker on to check it properly no way around it.

Thats one component you dont want to get wrong.
Buy some good 1 piece rods too, dont cheap out.

Apr 6, 2011 | 11:31 AM

mmracecars

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Joined: Feb 2011

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From: harrison twp mi

check out oepushrods they are in mt clemens,mi. they make alot of the pushrods other people are selling,they have checking tools also.my cylinder head guy told me about them years ago.
mike

Apr 6, 2011 | 12:12 PM

GREGGPENN

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From: Overland Park Kansas

2020 Corvette of the Year Finalist (appearance mods)

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Quote:

Originally Posted by bill925

could anyone tell me what pushrods i need?

Karnak, the Magnificent!

Apr 6, 2011 | 02:39 PM

Kubs

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From: Akron Ohio

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St. Jude Donor '09-'10-'11

You need one of these:

And one of these so you dont compress the lifter instead of open the valve:

What you do is assemble one lifter, checker pushrod, rocker, checker spring, and valve. use a marker to color the top of the valve before putting the rocker arm on. Rotate the engine so it opens and closes the valve a couple times. The worn off marker should be in the middle of the valve top. If it is to one side or the other the pushrod is too long or too short, adjust it accordingly.

Apr 6, 2011 | 02:50 PM

Ray Quayle

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From: North Yorkshire, England

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Quote:

Originally Posted by GREGGPENN

Karnak, the Magnificent!

Hermetically sealed in a mayonnaise jar on Funk & Wagnell's doorstep since noon today! Good one, Gregg.

Apr 7, 2011 | 10:59 AM

bill925

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From: Callaway Florida

alright thanks guys i appreciate it...

Apr 7, 2011 | 02:34 PM

rickneworleansla

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Joined: Aug 2004

Posts: 5,141

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From: Metairie Louisiana

These are the one's I used in my build but you will need to measure. Check out the link below for pics and info on how I measured for mine. Scroll to the bottom.

Trickflow Chromemoly Pushrods 7.150" (21407150)

http://forums.corvetteforum.com/c4-t...-needed-3.html