Help Push Rods
This is a discussion on Help Push Rods within the General Help forums, part of the LSx Technical Help Section category; I just bought a comp cam the duration at .050" lift is 224/230 (int./exh.) lift with 1.7 rockers is .581"/.588" ...
02-07-2010, 07:33 PM #1
Help Push Rods
I just bought a comp cam the duration at .050" lift is 224/230 (int./exh.) lift with 1.7 rockers is .581"/.588" (int./exh.) on 114 lsa. I need to know if I need different push rods. If someone could help me out and let me know it would be great.
02-07-2010, 08:08 PM #2
- Join Date
- Aug 2005
- Thornton, CO
Red Tint Jewelcoat
- 2008 Trailblazer SS
Only way to know....is to measure.
You likely don't, but at minimum you will want hardened pushrods and upgraded valvesprings.2008 Trailblazer SS
Yank PTB3600, Kooks 1 7/8" LT's, 4" intake, E-fans, Magnaflow, Sonnax kit, tranny cooler, tune.
Lowered, HID's, tinted.
1999 Pontiac Trans Am WS.6 #1747 SOLD
531.1 RWHP 481.3 FT/Pounds all motor.
02-09-2010, 07:53 AM #3
7.4's will do you fine. Like said earlier Chromoly pushrods and new valve springs would be wise to change also.
02-10-2010, 07:50 AM #4
I did buy new valve springs, and i was going to upgrade my push rods, I was just needing to know if I could buy standard length.
02-10-2010, 08:02 AM #5
Standard will do you fine
02-10-2010, 08:09 AM #6
I have seen the aftermarket cams base circle smaller the stock and it mite take a 7.425 instead of 7.4 but measure and know for a fact.
02-11-2010, 02:55 PM #7
Have you made any changes to your Cylinder Heads?? Lifters??? If not the guys responses are correct: 7.4 or 7.425 hardened chromoly + springs. 7.4 may increase the valvetrain noise slightly, 7.425 should be right on with the different base circle of Comp Cams WITH XER lobes.........
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