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Yeah, I agree that if you're going to pull the crank to install a crank collar, you may as well go all the way and do a spline drive oil pump. I know that Nitto claims that it's a problem to run spline drive on RBs hence their "sine drive" gears but I've yet to hear about a failure that wasn't due to improper installation.

  • 1 year later...

Is this why the Tomei oil pumps can’t turn by hand from new? I’ve had numerous other brands and it seems so tight

On 21/4/2021 at 4:13 PM, BK said:

I've got a feeling they are discontinued, but any collar may or may not cause an issue. Read the thread again regarding collars not fitting with a Tomei pump and why they had problems. All of the issues of a collar fouling the Tomei pump is purely because of machining or installation error due to the very tight tolerances of the Tomei pump and drive collar - the standard pumps have a lot more room for error on the drive area. The collars were sitting up too high or they didn't return back to their original clearance once heated - all caused by preparation or installation error.

Any of the collars should fit any of the aftermarket pumps and if they don't you machine to suit. Remember you have to machine / grind to crank before fitting so any error here couldl make it foul.

 

  • 1 year later...
On 4/19/2024 at 4:51 PM, Butters said:

So what did you end up doing ?  and is it still alive today ?

 

 

Hey, thanks for asking. 

I ended up using the Nitto crank collar (flat, not spline) with a Nitto oil pump. (Herman from Platinum Racing Products confirmed the Nitto crank collar would work just fine with the Tomei pump, BTW)
Combined with oil restrictors in the head, a head drain (to sump), a PRP block brace (lowers the pan around 3/4in for more oil capacity), a baffled oil pan, and a Leask Spec oil sump extension. I get the high oil pressure that RBs like, it holds 9.5 quarts of oil, and I don't have any risk of oil starvation at the track.

Launch control works great, and I can hit redline without worries. 

Car runs great and it's a beast on the track.  

PXL_20220526_225122283 (2).jpg

PXL_20220523_024957033.jpg

PXL_20220523_024905551 (1).jpg

  • Like 4
On 25/04/2021 at 2:03 AM, groovezog said:

Chill, dude. You seem to make a lot of false assumptions about my build and have some idea that I'm only going to hold the engine at redline and hit anti-lag in a parking lot with the sole intention of shooting flames, while doing no maintenance to the car or something.

I've built this car ground-up, from a shell, for racing and it's held up incredibly well. I'd like to setup anti-lag

At least you use your car as intended, those who have posted have not seen a race track in over a decade and/or their cars are still on hoists or jack stands 🥲😅😁

16 hours ago, Dose Pipe Sutututu said:

At least you use your car as intended, those who have posted have not seen a race track in over a decade and/or their cars are still on hoists or jack stands 🥲😅😁

Hey, thanks dude. Freedom to do whatever one wants to with their own car and build, but personally I don't want anything that's too precious. If I can't beat on it when I feel inspired, what's the point of having a car like this? And if I break something, it's me who's going to be fixing it myself...

  • Like 3

Totally agree here @groovezog!

There's advice and there's advice, sometimes the latter doesn't take inconsideration use case, budget, time, effort etc.

If we all wanted the ultimate track car with a dry sump, big displacement, we would just go to the nearest Porsche dealer and buy a 911 GT3 RS (that's if they even let you these days lol).

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