Just another home build 2056 upgrade...but this one is mine!, Redux THrē: It's been so FUN lets do it again..... Options

[rfinegan]

Porsche 914 2056 upgrade

1.7 case upgrade from 1.7.> 2.0 now> 2056

53.9 cc (turns out these are 1.8 heads)new 2.0 style chamber with 44 x38 valves and 57 CC cambers 9.0 CR

Cam Shaft /lifters RABY 9530. See Cam Card

KB 96 Pistons and rings (2.0 rods) EMW

H-Beam rods ARP bolts. EMW

2.0 Crank.25/ Standard /.25 rods

Webber 40 and 44 carbs

Short Pierce style manifolds 3/4 bolt

Malory Unilite Grey-Grey Distributor

Pete Weber 1 5/8 4-2-1 with Evo 2 muffler Tangerine 1 5/8 stub pipes and
with 02 bung at collector

Innovate LM-1 with RPM

Balance internals

Balance Crank NEW lightened/flywheel and Pressure plate with blower

1.7 tins complete

9.0 CR with Deck height to .040

Recommend RPM range. 6200?

Est HP GOAL. 130-140 HP?

After a tear down of my 2.0l engine I started the build up to the 2056 big bore upgrade. Having a Bridgeport I started with the (5) 3/8 oil galley plug on the block halves
Drilling a hole in the plugs and a slide hammer to remove the old plugs then started the installation of the new pugs I was able to order from Type 4 store.





https://www.youtube.com/watch?v=50CYceSrBq0



https://www.youtube.com/watch?v=GOMa6nqbkBQ

[930cabman]

I know there are no dumb questions, but,

I also have used Plasticgage for checking bearing clearance's and feel this method is reasonably sound. Bolt stretch: once a bolt is stretched with X# ft/lbs. and released does it return to it's untorqued length? and can you repeat the process and obtain the same result with the same bolt? Does the stretch measurement include any stretching with the internal threads in the nut?

BTW: thanks for documenting and good luck with the build

[rfinegan]

Torque-to-yield fastener
From Wikipedia, the free encyclopedia

A torque to yield fastener (TTY) or stretch bolt is a fastener which is torqued beyond the state of elasticity and therefore undergoes plastic deformation, causing it to become permanently elongated.[1][2]

Fastener[edit]
Torquing a fastener to its yield point results in a high preloading of the fastener which, depending on the load frequency and amplitude, can significantly increase the fatigue life of the fastener. When the applied load doesn't surpass the clamping force of the fastener, the strain of the fastener will be lower than when the preloading is smaller than the applied load. It is therefore beneficial in high-frequency high-load situations with a higher risk of fatigue related failure, like a bolted down cylinder head, to use torque to yield bolts.[citation needed]

Advantage: Compared to normally tightened hardware, a smaller sized TTY bolt/screw may be used while still maintaining the same clamping force.
Disadvantage: A drawback with TTY hardware is that it normally has to be replaced when loosened, for example when the cylinder head is removed.[3]

SO...I may have not followed the process of torque stretch or TTY as I did a bench test on the stretch method with just the rod. And I believe the bolts are one time use but the advantages above may be with it.

Anyone feel I should replace the 2 ARP bolts I did the stretch test on prior to installing? This is the same rod as the one I Plasti-gaged too

I know there are no dumb questions, but,

I also have used Plasticgage for checking bearing clearance's and feel this method is reasonably sound. Bolt stretch: once a bolt is stretched with X# ft/lbs. and released does it return to it's untorqued length? and can you repeat the process and obtain the same result with the same bolt? Does the stretch measurement include any stretching with the internal threads in the nut?

BTW: thanks for documenting and good luck with the build