ive been reading toda's website and they stress how important it is. Does it add any power or is it just a safety precaution?

 

the oil pump gear does exactly what it says. it pumps oil through the engine. correct me if i'm wrong anyone.

 

Well, seeing how it is the heart of the lubrication system I would assume that it is very important

 

with that in mind, would you guys say that an upgraded oil pump gear (such as the one made by prodrive) is a worthwhile upgrade?

-tony

 

Depends on your power-level and rpm range.

Anything over 400whp, prolly recommended. The stock Gears are made of Sintered Iron, which likes to shatter.

Also, if your building the motor for 9k+rpm Circuit Racing, etc...prolly a good investment.

Suprdave

 

Well in the interveiw by Import Tuner (issue #41) of Tatsura Ichishima (Mr.Spoon) . He did say that the oil pump was a weak point of a Hi reving B-series motor. Something about the shock of a rough enagement of the clutch at high rpm could cause the crank move where it touchs the oil pump and makes them shatter.


[Modified by PyR01-0347, 7:25 AM 11/25/2002]

 

I just posted something about this a couple of days ago, here this might help:
Oil Pressure is set by the by-pass spring in the pump it self, and bearing clearance within the engine also affects it, oil pressure is resistence to flow.All of the honda oil pumps have the same volume capacity, well not really, but they are really close, there are an early and late gear set, I believe they are 80 mm and 84mm(diameter),but their flow ratings are very close to each other.The capacity of the pump is set by the gear size itself(diameter and width and number of teeth and type of gears), a honda pump is whats know as a g-rotor style pump where one gear turns around the outside of the inner gear. A g-rotor pump is not really happy at high rpm because of its design, by this i mean from an efficiency stand point,it doesnt pump oil well and this happens because of the gear type,with out getting to technical,the g-rotor cavitates(creates vacuum pockets within the pump section that should be filled with oil,but cant due to its design) at high rpm and high is not as high as you would think(4500 rpm pump speed, which in this case is the same as crank rpm,pump is driven directly by the crank snout).There are people who will argue this point, but the proof is out there, that this is a problem.There are after-market gears sets available to stop gear breakage from the destructive forces of the cavitation,but all they really do is delay the problem,they too will fail eventually,these forces are so powerful that they literally erode small pits into the gears,which over time become larger,at the same time this is going on the harmonics from this process can osicilate the gears to their natural resonate fequency and cause them to just break apart, the cracks starting in the pitting in the gears.Sorry this got a little long,also this is not the only reason hondas break the gears,but I will try to continue this if you guys want.Hope this helps
I had posted this under another topic about a b16 pump vs a b18 pump , for a daily driven street car the aftermarket gears are a good idea, they just dont make it bullet-proof ,the other reason the gears break is from the crank flexing in a high horsepower enviroment,when this happens the gears bind against each other and break.

 

Good info thanks!

to helpful nu.b's

P.S. Some people around here like to bitch about writing structure... not me. (use line spacing)