Adding oil injectors from a 3500 to a 3400?

[bob442]

So i've been pondering this idea, unfortunetly, i cant seem to find any pictures for reference on how there is the 2 oil injectors on pistons 5 & 6 on the 3500.

Has anyone gone further with this idea than i have? is the oil pump that same on a 3500? i was thinking it might be a really easy upgrade to do, and the only reason i want to is after seeing my 5 & 6 pistons out of my block. They have gotten alot hotter, and have alot more wear on the skirts than pistons 1 through 4.

If it was as simple as tapping 2 or 4 holes to mount and plumb the injectors...why not?
But then, again, i havent had a 3500 apart in my hands to compare.

[MidnightriderZ24]

ive looked into it and even purchased the squirters. it will require machine work, more than i wanted to had done..

[robertisaar]

i think dropping a 3500 block in would just be easier.

[mickaz]

i think dropping a 3500 block in would just be easier.

and cheaper LOL

[AaronGTR]

You could use the 3500 block yes, but then you have the problem of less availability of aftermarket components for the internals, and 3500 rods are supposed to be weaker than 3400 rods iirc. It would depend on you power goals, but I imagine if you are wanting to add oil sprayers then you are probably aiming pretty high? You can use modified small journal SBC rods in the 3400 but not in the 3500. Only thing that is stronger in the 3500 is the crank. If I was really gonna bother with machine work to add oil sprays, I would do it on all cylinders. Not sure but I think the 3900 had that? But anyway if you were doing that you might end up having to add a high volume oil pump to keep the pressure up and possibly other modifications to the oil passages... it could get expensive and complicated. If you aren't building a racing engine, I'd just stick with a base 3400 or 3500 block and not mess with the oiling.

[bob442]

Ya, i thought it might be as easy as adding oil passage lines on a SBF, which you basically tap 2 lines from the rear of the block on the main oil passage and another 2 in the middle of the valley and run 2 copper lines from and 2 each. Anyone got a picture of the bottom end with the oil injectors in plain view?