17 replies to this topic

[haggi961]

Hey Guys, I've found a company in the U.K. that could make us a set of stronger oil pump gears. I've been doing a lot of reading and they say if your spending a lot of time over 7k revs then these are a good upgrade http://www.cobaltss....failure-186065/ There is one compaby who sells them in the us but they have stop making them going from the conversion I've had with them. So these are really hard to get hold of now. Anyway I've found a company who said they could make us a set if I sent my oil pump gears into them so they can copy and make a stronger set. I'm happy to do this, but was seeing If some of you guys was interested also. ATM I'm just talking to them and haven't a price as they would like more details before they can give a price. So does anyone have dimensions of the oem gears that I can fire over to get a rough idea on price for now? I also think this is aimed more at the later style oil pump housing as I'm sure the older style is a different size.

Edited by haggi961, 29 March 2017 - 11:58 AM.

[Nev]

Sounds like a good idea, the Z20LET gear is weak too.

[Johnboyhgt]

i would be interested if for NA ??

[chris_uk]

vocky suggests that the b207 timing chain cover have better gears/pump so they are an upgrade over the z22se ones. Thats all i was going to do.

[haggi961]

vocky suggests that the b207 timing chain cover have better gears/pump so they are an upgrade over the z22se ones. Thats all i was going to do.

Yes I've heard this also. Maybe the later ones are worth trying first before spending more money on parts 😂

[Raptor]

Does the Z22YH also have stronger oil pump gears?

[vocky]

I believe it might, think it came out 2004 ish. But not 100% sure on that.

[vocky]

The Neo B207 engines all came with the later spec oil pump

[FLD]

I've a spare set of gears in t' loft I think. Would it help?

[alanoo]

Contrary to what we used to believe, the "GM Racing" gears are not billet, but just OE ones hardened.

When I had my old engine built, I had spare sets hardened by the same process other manufacturers uses, which worked great as I didn't saw any kind of piting as I had on my OE gears.

 

This may be a lot cheaper to do if you want to.

On the other hand, the Sodemo BTCC engine had billet gears, thinner than the OE ones (less flow), and a reduced oil pressure.

[ginek]

Myself if for NA. Actually any ITBd car owner should be interested, as our cars rev to 7800 by default.

But then I have currently a Z22YH pump installed and another brand new B207 one as spare already. The joy of endless spare parts hoarding...

[Exmantaa]

Contrary to what we used to believe, the "GM Racing" gears are not billet, but just OE ones hardened.

When I had my old engine built, I had spare sets hardened by the same process other manufacturers uses, which worked great as I didn't saw any kind of piting as I had on my OE gears.

 

This may be a lot cheaper to do if you want to.

On the other hand, the Sodemo BTCC engine had billet gears, thinner than the OE ones (less flow), and a reduced oil pressure.

 

Any more details on a specific hardening process for the gears?

[haggi961]

Contrary to what we used to believe, the "GM Racing" gears are not billet, but just OE ones hardened. When I had my old engine built, I had spare sets hardened by the same process other manufacturers uses, which worked great as I didn't saw any kind of piting as I had on my OE gears.   This may be a lot cheaper to do if you want to. On the other hand, the Sodemo BTCC engine had billet gears, thinner than the OE ones (less flow), and a reduced oil pressure.

  Any more details on a specific hardening process for the gears?

Yes il would be interested in knowing this please and the type of metal used on the gears?

[alanoo]

 

Contrary to what we used to believe, the "GM Racing" gears are not billet, but just OE ones hardened.

When I had my old engine built, I had spare sets hardened by the same process other manufacturers uses, which worked great as I didn't saw any kind of piting as I had on my OE gears.

 

This may be a lot cheaper to do if you want to.

On the other hand, the Sodemo BTCC engine had billet gears, thinner than the OE ones (less flow), and a reduced oil pressure.

 

Any more details on a specific hardening process for the gears?

 

 

I do not know the English name of it.

From what I understood, it is done by inclusion of water stem one the part heated at high temperatures

The mates explained it is what is used by OE manufacturers and that is basically almost doubles the surface hardness. I even had the hardness data at the time, but not sure I still have it.

 

Pignon_2 by Alan, sur Flickr

[chris_uk]

Make a blast furnace.. Put it in Wait till its yellow Dunk it in oil Done Wait.. have i been watching too much man at arms.. lol

[Nev]

On the Z20LET gear there are 2 issues that I know of:

 

1. The side of the gear errodes into the side of the housing causing some play.

2. The gear shatters completely into 2 or more bits.

 

I think nitdriding (or some other surface treatment) would only help with point 1 above, but not with point 2. The whole thing needs to be made stronger to stop it shattering.

 

[slindborg]

On the Z20LET gear there are 2 issues that I know of:   1. The side of the gear errodes into the side of the housing causing some play. 2. The gear shatters completely into 2 or more bits.   I think nitdriding (or some other surface treatment) would only help with point 1 above, but not with point 2. The whole thing needs to be made stronger to stop it shattering.  

Don't sbd sell some unicorn horn oil pump bits for the xe/let

[Nev]

 

On the Z20LET gear there are 2 issues that I know of:   1. The side of the gear errodes into the side of the housing causing some play. 2. The gear shatters completely into 2 or more bits.   I think nitdriding (or some other surface treatment) would only help with point 1 above, but not with point 2. The whole thing needs to be made stronger to stop it shattering.  

Don't sbd sell some unicorn horn oil pump bits for the xe/let

 

 

Yep, they do/did.