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Advice for fresh 440 .030

Started by Mopar94, August 18, 2023, 05:16:47 AM

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Mopar94

OK Thank you for your answers !

Interesting article about LSA

My first choice was Whiplash. But 107° LSA.....

I'm really wondering if I'm going to take the summit one. This makes it much easier for me to pay shipping costs to France.

Chryco Psycho

It will probably cost you 50HP & you will be disappointed  :rubeyes:

Mopar94

#17
Quote from: Chryco Psycho on August 28, 2023, 06:57:49 PM
It will probably cost you 50HP & you will be disappointed  :rubeyes:
Really ?

Ok Chryco. I'll call lunati. never mind the shipping and customs charges  :takemymoney:

let's go for lunati with custom grind 112 LSA

I hesitate between the 703 or the 704 (voodoo of course) :thinking:    with stock rocker, HP manifold,  2355 pistons and hughes 2400 stall torque converter  :bradsthumb:


Mopar94

Hello guys !

The voodoo 703 it's in production.

on the Lunati website it says : Makes un-equaled power to 6200 RPM with proper valve springs

I managed to find 2 spring references in their catalog


73100-16 and "upgrade" : 74820-16 ( BEEHIVE )


this means I need the second part number for the 6200RPM ?

It's OK for stock rocker ?


About connecting rods and pistons, I've changed my mind and bought a set of platinum pistons and forged 440-source connecting rods.


Chryco Psycho

I would use the second spring [beehive] they are far more stable .
generally 6000 rpm is ok on stack rockers , if they are not badly worn , , I would recommend bronze bushed stainless rockers as an upgrade if you decide to to that .

Mopar94

My rockers is ok.

Ok for the beehive thanks Chryco


The seat pressure is more important than the first spring, it's ok for break in the cam ?

Chryco Psycho

Break in is always a crap shoot , use good oil , start it one time if possible & le it run at 2k for 20 mins , don't rev it up


Mopar94

Ok Chryco

With the stock rockers, will I lose a lot of lift?

Chryco Psycho

The stock rockers are not as accurate in the 1.5 ratio as other rockers "should be"
For street use I do not use alum or rockers with roller brgs on the rocker shaft , I only use rockers that are bronze bushed on the rocker shaft as this give a far greater surface area & lean towards Stainless steel roller tip rockers for durability .
When using any aftermarket rocker DO NOT overtorque the rocker shaft to the head , if the shaft becomes oval the rocker can seize holding a valve open which can break the piston & cause the whole engine to end up as Junk [ the intake should survive!] I have seen this in person .