Plumbing fitting sizes

[JHandley]

Hello all,

Getting some plumbing materials together and was wondering about some sizes.
All for a 2.0 pinto

Water Pump Inlet
T-stat housing outlet

Titan Standard Oil pump
Inlet from oil tank
Scavange Ports
Pressure Ports to Block
Return line to oil tank

Thanx one and all
Jeff

[kea]

Jeff,
Most 2Ltr. F/C engines use 5/8" (-10AN) sizes for the oil system. Some scavange pipes may be 3/4".
Keith

[JHandley]

Thanx Keith,
So the 3/4 would be a -12an?

[kea]

Yes, 3/4" (or 12/16th) is -12, see how it works!
Keith

[JHandley]

Okay, I see the sizing now
Thanx Keith
The water pump inlet and the t stat housing outlet look to be about 1 1/2 to 2 "

[EricP]

I need to piggyback on this thread... I’m swapping things over to a new (to me) elite engine. All the oil lines on my engine are -10 but the fitting on the oil filter boss (where the pressure line from the pump goes into the block) is -8. So, my pump pressure line fitting is -10 but will step down to -8 entering the block. Is this bad? I would have to tap the new block for a bigger fitting. Possible but not easy.

[Garey Guzman]

You should be able to just change the adaptor fitting. This will be best so you don't add another joint and the different adaptor will *should" have the smallest change in ID to minimize flow disruption.

[EricP]

So change to -10 fitting with same size NPT as current that threads into the block?

[DaveW]

I need to piggyback on this thread... I’m swapping things over to a new (to me) elite engine. All the oil lines on my engine are -10 but the fitting on the oil filter boss (where the pressure line from the pump goes into the block) is -8. So, my pump pressure line fitting is -10 but will step down to -8 entering the block. Is this bad? I would have to tap the new block for a bigger fitting. Possible but not easy.

I have always used -8 push-on hose and fittings for everything on the pressure side. IMO, any larger is a waste of space and harder to route (needs a large bend radius). -8 has never caused me any issues. I use -10 for the supply side of the pump and the returns to the tank.

And while on the subject of hose, SS braided lines are nothing but a PITA and have no benefits over push-on hose and fittings (except, of course for brake and clutch lines).

[BeerBudgetRacing]

So change to -10 fitting with same size NPT as current that threads into the block?

Yep - the pressure outlet on the pump can be changed from -10 to -8.

It's a piece like this:
https://www.summitracing.com/parts/s...162b/overview/