The Jalopy Journal
Discussion in 'Traditional Hot Rods' started by dart4forte, Aug 9, 2021.
By chance is there any early Hemi owners that happen to know the Desoto 330 Hemi pushrod length?
From a 1956 330ci, hope this helps.
Looks 10 3/4”
Aren't the intake and exhaust pushrods different lengths?
I thought they were all the same with non adjustable rockers
Intake and exhaust will be two different lengths,,,,,be cautious of that .
So not same length. Inherent with all early hemis?
A good pair of 12" calipers should get you very close.... I have the Mititoyo calipers... Very accurate!...
The ones for my 426 are two lengths as well,,,,,,it all goes back to the rocker layout .
The intake rockers rotate inboard,,,to push the valve down .
The exhaust rotate outboard to push the valve .
Since the exhaust rocker is almost twice as long ,,,,it requires a different angle of attack from the pushrod,,,,,so length is quite a bit different .
Good to know
Pushrod length checker is $20-$30. Blocks get decked, Heads get milled. Buying pushrods twice sucks.
Cams are Reground,no one can give you the correct answer,measure for your self.
Fortunately I have the build sheet for this motor
Exhaust are longer, high decks longer than low decks
I apologize for the quick and misleading response last night. That’s what I get for trying to do one more thing before I go in for the night, I should know better. Every response after mine is accurate. The exhaust and intake pushrods are different lengths. And much more accurate measurements are needed to complete the build of a high end motor.
Maybe I misread or misinterpreted your question but I took as a generic question. As in; I have these pushrods laying here but I don’t know if they are Desoto, Dodge, or are poly motor pushrods, about what length am I looking for. Or I’m headed to a swap meet but… Never would I assume someone would build the engine using the same tools as to frame their house.
The pushrod pictured is an exhaust. Taken from a 1956, S-23, 330ci motor, if you had seen the rest of the motor you would be as confident as I that it had the original pushrods. It may have even had the original oil. If you want a rough measurement for the intake I can get you that this evening. If you are looking for a good set of stock pushrods, I suggest watching the Hot Heads Swap Meet site. As mentioned by many of the previous post, most people that put thousand’s into their build go with adjustable pushrods. That leaves a lot of stock sets being sold for around $20-$30 a set.
Call Smith Brothers Pushrods.
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