LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

what push rods ?

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Old 02-17-2005, 12:26 AM
  #1  
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Location: Central Florida
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Arrow what push rods ?

This is what I have...............

Combination motor sports springs .600 lift single spring

Proform 1.6 S/A rockers

Speed pro cam
>>>>>>>>>>>>>>>>>>>>> INTAKE .......... EXHAUST >>>>>
>>>>>>>>>
>>>>>>>>>>> .050 dur .... 222 .......... 232
>>>>>>>>>> SAE dur .... 297 .......... 307
>>>>>>>>>> CAM lift ..... .319 .......... .334
>>>>>>>>> VALVE lift .... .479 ........... .501
>>>>>>>>> lobe centers .... 109 ......... 119

I want to go with hardended push rods BUT WHAT LENGTH SHOULD I GET ??

I am also getting 3/8 ARP studs

ANYTHING ELSE ???????????????
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Old 02-17-2005, 01:05 AM
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Re: what push rods ?

To be 100% exact about pushrod length, you must check it using a pusrod length checker. I have used the comp checker which is adjustable from 6.8-7.8" and checked the ideal length different LT1 setups including decked blockes and small base circle cams, and it always came to 7.2" (stock length).
Factors affecting pushrod length:
1- Deck hight,
2- Head milling,
3- Cam base circle,
4- Lifter hight,
5- Valve length.
Saying that I'm 99% sure that the stock length of 7.2 will be perfect for your setup.
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Old 02-17-2005, 02:19 AM
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Re: what push rods ?

you will be fine w/ 7.2 pushrods. For your setup, i would NOT recomend spending alot of cash on chromoly pushrods.

Your stockers will work fine. You dont need hardened because you are not running guide plates due to the fact that you are running self aligning rockers.

If you want to run new pushrods for peace of mind, i would just get combination motorsports' standard pushrods. They should run you about $20
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