strait cut oil pump gears

[Neil Van]

So this winter i pulled my head off my car because of a noise in my head(i thought) found damaged pistons from something passing though the motor. but i also found that my oil pump was about to seize up so it was a good catch because it saved my rotating assembly on my stroker motor. ended up replacing 2 pistons and had to replace the block because my cylinders were too far out of spec to stay .020 over. i bought the GSC race shaft hoping to fix the oil pump issue from the first build. I also wanted to run strait cut gears on my 6 bolt. the existing gears are helical but can i just run the strait cut gears in the same case as long as its a 6bolt?

 

[gsxeclipse102]

Ive read that straight cut cases differ from helical but i installed new oem straight cut gears in my acl oil pump( orig. helical) and all the measurements were in spec. Motors been to 9k many times and no problems yet.

 

[94awdcoupe]

curious. do you hear the straight cut wining ?

 

[Neil Van]

good to know someone has done it. the only requirement i see when ordering them from extreme psi or jnz is that its for a 6 bolt case.

 

[gsxeclipse102]

I dont hear any whining.

 

[gofer]

So this winter i pulled my head off my car because of a noise in my head(i thought) found damaged pistons from something passing though the motor. but i also found that my oil pump was about to seize up so it was a good catch because it saved my rotating assembly on my stroker motor. ended up replacing 2 pistons and had to replace the block because my cylinders were too far out of spec to stay .020 over. i bought the GSC race shaft hoping to fix the oil pump issue from the first build. I also wanted to run strait cut gears on my 6 bolt. the existing gears are helical but can i just run the strait cut gears in the same case as long as its a 6bolt?

You can run straight cut gears in a 7-bolt case too, doesn't matter. It's actually preferable that you do run straight cut gears if you've done a BS delete.

 

[GST with PSI]

Ive read that straight cut cases differ from helical but i installed new oem straight cut gears in my acl oil pump( orig. helical) and all the measurements were in spec.

+1.

I've heard it said the gears can't be swapped between cases, but I've done it many times without issue. I always run the straight cut gears in my pumps. Just ensure the pump specs out according the the manual if you swap any components.

 

[92AWDHX40]

I was curious about that too but I've only seen straight cut gears on all of my of my pumps.

 

[Neil Van]

awesome.. thanks for all the feedback