304 355" build thread

[Deuce]

#1 cam bearing removed, and oil crossover sorted.

 

[Immortality]

Now you need a small ball burr to round off the edges of those holes

 

[Deuce]

Now you need a small ball burr to round off the edges of those holes

Bad photo, but they are rounded slightly for the entry/exit to the groove. But obviously not to the bearing surface (as why would you)
I possibly could radius them more, but it's only for lifter and top end feed on that side, so not overly important (compared to increasing mains supply etc)

 

[Smitty]

talking oiling and oil feeds...... I do the 'feed No4 'internal mod

pic does not have the joining feed pipe installed yet... but you get the idea

 

[Deuce]

talking oiling and oil feeds...... I do the 'feed No4 'internal mod

pic does not have the joining feed pipe installed yet... but you get the idea

View attachment 267304

Yes!
That's my next plan.
What thread size do you use for fittings?

 

[someguy360]

View attachment 267304

I love that lifter valley!

I've always wanted to try Glyptal and am still deciding whether I want to try with this build as we all know with a Holden any way of helping oil get back to the bottom end as fast as possible is good. but have always been paranoid about not having the surface 100% decontaminated and it flaking or peeling once I get the engine running and I can't see it.

 

[Immortality]

View attachment 267304

I see you have drilled extra holes in the lifter valley to aid oil drain back as well. Are there any other holes other than the one I see between the 2 lifter bores?

 

[Smitty]

I love that lifter valley!

I've always wanted to try Glyptal and am still deciding whether I want to try with this build as we all know with a Holden any way of helping oil get back to the bottom end as fast as possible is good. but have always been paranoid about not having the surface 100% decontaminated and it flaking or peeling once I get the engine running and I can't see it.

Glyptal... in use in my race engines for 20+ years

never flaked, peeled or chipped

Neil Burns (LPs engine builder) said try it... Larry has used it since the 80s
this pic taken in the early noughties (forget which race car the engines was in)

 

[Smitty]

Yes!
That's my next plan.
What thread size do you use for fittings?

6AN from memory

 

[someguy360]

Glyptal... in use in my race engines for 20+ years

never flaked, peeled or chipped

Neil Burns (LPs engine builder) said try it... Larry has used it since the 80s
this pic taken in the early noughties (forget which race car the engines was in)

Does it need to be primed before hand etc or just brush on?

I’m guessing just a degrease of any machining oils etc in the valley should be enough…..tempting