oil pump, which one Options

[trojanhorsepower]

All,
I am looking to change the oil pump as a way to up my oil pressure. I understand that this may well not help, but having a new oil pump around is OK.
With that in mind, what are my options? I will pull the motor but hope to not split the case. Is this even possible? Which pump?

Thanks

Peter

[trojanhorsepower]

OK, thanks for all the advice. I will swap the T1 for this T4 later this year and report back.

Just out of curiosity is there anyone that sells refurbished (like the Samba) oil pumps?

[Superhawk996]

Just out of curiosity is there anyone that sells refurbished (like the Samba) oil pumps?

Not that I’m aware of.

The problem is the labor to do the work makes the refurbished T4 pump cost uncompetitive to just buying a T1 pump. I was away from hardcore 914 work from about 1999-2018. Somewhere in there, it appears everyone started using T1 pumps because they are cheap and T4 pumps became NLA.

Maybe at one point the T1 pumps fit better? But based on the Raby post of him doing his own billet CNC pumps I’m inferring that they were always somewhat of a problem for him to get properly sized T1 pumps too.

When I bought that billet CNC 30mm T4 pump that was around $300. Gives you an idea of why so many are highly motivated to use the modified T1 pumps regardless of the warts. Using a $300 pump on a $25k engine build makes sense.

But to reiterate, oil pumps rarely fail unless abused by
1) Overheating
2) Running out of oil and running them dry
3) Engine damage occurs & shrapnel gets ingested and score the pump body, end plate, and gears.
4) Pump / engine sat outside exposed to weather, acidic oil, water/rust pitting damage, etc.

Many could simply reuse their old T4 pump but they have been misled into thinking the new $50 or $60 modified Shadek is always better than a used T4 pump which isn’t always the case. Again: may have made sense at some point but given current T1 pump size issues I personally don’t think this still applies.

A great example of this ability to reuse oil pumps shows up in the 911 world where it’s a whole lot more common to reuse oil pumps and oil coolers unless something catastrophic has occurred. The difference there being a new 4 rib oil pump will set you back $1000 ish. Not an apples to apples comparison as the 911 pump is way more complicated than the T4 pump but you get the point of why reuse is so much more common.