Big Block 400 Help!!

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04-29-2019, 09:47 PM

Bradymeger

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Big Block 400 Help!!

So I decided to make an account and ask a quick question on here, I have a thumpr cam in my 400, its not running yet as I have it out of the truck right now. I was wondering if it is okay for me to be running that cam with the stock rockers? Thanks

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04-30-2019, 05:49 AM

Archer

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B -

Assuming new hydraulic lifters and good springs, yes.

Archer

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04-30-2019, 07:56 AM

Bradymeger

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Quote:

Originally Posted by Archer

B -

Assuming new hydraulic lifters and good springs, yes.

Archer

Yes I have new lifters and I just had the heads rebuilt so the springs should be good

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04-30-2019, 05:03 PM

mocotom

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I agree with Archer, roller rockers are not necessary for a cam that size. Save your money for other go fast items

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04-30-2019, 05:21 PM

Iowan

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Probably more important is the correct valve springs. 500 lift stock springs will not cut it. I tried stock springs with a Hemi cam once and was breaking springs with in the first twenty miles and that is a smaller cam than the thumper cam.

Last edited by Iowan; 04-30-2019 at 05:26 PM.