Hi Folks,

This is not a direct Honda question as I'm working with a Mazda BP 1.8 engine, but I was hoping some of the experts on this forum can help me.

I'm looking at adding an external Oil Pump to my new built engine, but keeping
the stock Oil Pan and modding the Oil Pump front cover/Housing to have an inlet
and outlet for the external Oil Pump.

Is this possible? Has anyone done this? I understand I am going to have to make mounting brackets for the pump, pullies for the pump etc.

The main confusion for me is what I do with the stock oil pump gears (Take them out) and how I will feed oil into the engine from the external system and how I will take it from the pan.. (Would I use the stock pickup, or just add my own to my stock aluminum oil pan)

I know I'm missing a bunch of stuff here, but I have lost far tooooo many engines in the past 2 years due to Oil Pump Failures and I just can't keep this up. Heck, I'm only making 450-500hp. I would like to make more, but don't want to try until I get this Oil pump problem behind me.

Any help would be great..

Thanks! This new engine is costing me more than my last ones due to come custom pistons and other work.. I don't want to loose it due to the Oil Pump!

 

we are at 550whp in our bp escort and we havent had any oil pump failures ever. i would like to know about this to.

 

What RPM are you revving your engine to? I always seem to break them if I rev to 8000+ rpm and it is when I let of the gas in 4th gear. Happened on the Dyno a few times and one the street/strip a few times.

Have not broken when shifting at 7500rpm yet.. My motor still makes power and is climbing at 8000+rpm and that was with a stock cylinder head.

Thanks, Marc

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by TurboMiata.net &raquo;</TD></TR><TR><TD CLASS="quote">What RPM are you revving your engine to? I always seem to break them if I rev to 8000+ rpm and it is when I let of the gas in 4th gear. Happened on the Dyno a few times and one the street/strip a few times.

Have not broken when shifting at 7500rpm yet.. My motor still makes power and is climbing at 8000+rpm and that was with a stock cylinder head.

Thanks, Marc</TD></TR></TABLE>

yeah we dont rev past 7500. even though we are still making power we wont rev because the head has stock valve train.

 

if you take the gears out of your pump youll never build the pressure. the correct way to do it would be to tap your pan at the lowest point, then run that line to the pump. run a line out of the pump that has a relocated filter housing. then make a fitting that will squirt the oil into the old filter location. bascically the same as a dry sump except you dont have a remote can for the oil to sit in.

 

Mike here from Peterson Fluid Systems. Usually we pull the oil from the pan with an external type pickup and put the oil back into the stock oil filter position. This is for both wet and dry sump type applications. We try to run the pump at 50 - 57% of engine speed as this provides the best oiling with the least amount of parasitic loss. The stock oil pump in most of the 4 cylinders we have seen usually cannot supply enough oil to the bearings once you start to push the motor to twice the stock horspower. The benefits we have seen on Honda and Mitsubishi engine bearings has been amazing. The stock oil pump should be removed as well as the pickup, and most people plug off the pump housing. If you have any other questions please feel free to ask away.

 

Mike,

Great info.. Do you have any info on the recommended pump and how to get the correct engine speed to the pump? I've never done something like this before, but I think it is time..

 

Marc,
The pump speed is determined by the pulley ratio which I can help you figure out once you get a pump mounted. For some different options and some more info why dont you give me a call @ (800) 926-7867 and i can help you figure all this out.

Mike

 

Mark, i too never broke an oil pump in all the bp motors i built. My last race motor was being reved to 8800rpm too! Yes i still had the stock valvetrain and hydro lifters (kids don't try this at home lol)

 

I wonder why my I have broken so many oil pumps? What am I doing weird?