Does anyone know if the stock pushrods are hardened or not?

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1991 Z28 5.7L
All free mods/afpr/hurst lock up harness/flowmasters(off)/lakewood Lca's/accel stock size injectors/msd6A-plugs, ignition coil/k&n/lakewood adjustable panhard rod.
1/4mile 13.7@102. Expected et next outing 12.9@? (with slp 1 3/4 headers and new ported sportsman II heads along with 24lb injectors, adjustable torque arm spohn or bmr)

 

I don't know for sure, but I'm guessing no. Hardened pushrods are about $35 bucks... Comp Cams

 

stock pushrods are typically carbon steel tubes with hardened ***** welded on the ends. The pushrods that alot of aftermarket guys sell are one piece and are hardened as a single part. Which is better? well, the factory is adequate for normal stock type seat pressures, but as you increase the spring pressure, better units are mandatory. You would be surpised how much the stock ones can handle though, if you are re-using them and not going overboard with springs, then just make sure they are straight(roll em on a peice of glass and make sure then don't wobble) and you will be fine. If you have to buy some, get some aftermarket ones, probably only pay a few $ more, and can be used if you ever decide to go bigger.

 

Thanks for the replies. The reason I asked was because i'm putting new cylinder heads on and they have guide plates, I know they say that you should use hardened pushrod with guide plates. Can I make it with the stock pushrods?

 

So you bought new heads with guideplates and you're going to get cheap on the pushrods? Spend the $35 bucks. You are going to spend it now or spend it in a month when your pushrod buckles due to a severely decreased wall thickness, but then you have to buy new intake manifold gaskets and worry about little pushrod shavings floating around in your oil pan. I vote new pushrods.

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355 c.i.
Dart 180 Heads
Lunati 224/224 cam
Harland Sharp 1.5 rockers
Performer RPM Manifold
Holley 600 cfm double pumper
Hooker Super Competition Headers
Flowmaster Exhaust
Competition Engineering Sub-frame connectors
Super T-10
GM posi 3.42 rear
Hurst Roll Control
13.9@102

 

You better buy new headbolts and decent head gaskets too!

 

I have all new fel-pro gaskets and arp bolts. I will just have to wait to order some new pushrods...damn!

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1991 Z28 5.7L
All free mods/afpr/hurst lock up harness/flowmasters(off)/lakewood Lca's/accel stock size injectors/msd6A-plugs, ignition coil/k&n/lakewood adjustable panhard rod.
1/4mile 13.7@102. Expected et next outing 12.9@? (with slp 1 3/4 headers and new ported sportsman II heads along with 24lb injectors, adjustable torque arm spohn or bmr)

 

hey cam28 boy, where did you run those times?

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1991 Firebird
350 L98 (was a 305 TBI),T-5,Edelbrock TES and cat back,Accel manifold
NOS,subframes,jegster torque arm,MSD Digital 6
AFPR,Lakewood lcas
Hurst linelock,SLP cam (206 212 .480 .486),relocated battery,cold air,Hypertech chip,centerforce df,clutch
poly bushings and mounts
AFR 190s
Harland sharp 1.5 rockers
autopower rollbar

12.33 @ 114.83 juiced uncorrected

13.510 @ 102 non juiced uncorrected

 

Hey GoFaster, I ran those times @ Lapeer dragway, about 2 months ago. After I but these sportsman II heads and torque arm on, I plan on running a 13.0 or even a 12.98.

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1991 Z28 5.7L
All free mods/afpr/hurst lock up harness/flowmasters(off)/lakewood Lca's/accel stock size injectors/msd6A-plugs, ignition coil/k&n/lakewood adjustable panhard rod.
1/4mile 13.7@102. Expected et next outing 12.9@? (with slp 1 3/4 headers and new ported sportsman II heads along with 24lb injectors, adjustable torque arm spohn or bmr)

 

I ran those times about 2months ago at lapeer dragway. I'm expecting even lower times with my next wave of mods.