Gudgeon Pin Wall Thickness/weight -> RPM Limit?

[TurboTapin]

Question for everyone. I'm wrapping up an RB28 build (Stroked RB25) and went with .250" gudgeon pins along with CP Pistons. I figured the extra wall thickness would come in handy down the road if ever I decide to push it further with nitrous. I'm running a complete Ferrea valvetrain and new hydraulic lifters. 

I had presumed at the time my hydraulic lifters would limit my RPM well before the extra gudgeon pin weight would. My machinist who has done countless RB's seems to think otherwise. I have no reason to doubt what he says, but he does tend to err on the side of caution and I just wanted a second opinion. I was planning on pushing it to a somewhat conservative 8000RPM. He said he would not be comfortable past 7400RPM due to the added rotational weight. 

Thoughts? 

Edited March 15, 2022 by TurboTapin

[33GTRV]

I have the upgraded pins in my rb28. Regularly sees 8500+rpm. Drag pro I beam Spool rods and CP pistons. For science, weigh a stock piston and pin assembly, then an aftermarket piston and pin assembly, you may be surprised. 

Provided the rotating assembly is balanced well, crank thrust is in spec, a good oil pump and restrictors are used and a decent balancer is on it, the limiting factor will be hydraulic top end, then crank flex, block movement and cylinder pressure. The last one, cylinder pressure, is the one that catches most RB guys out. Watch the timing at peak torque on stock unfilled blocks. If you can, blow some pressure out the exhaust or take timing out of it, and it will live a happy life, full of fuel guzzling

[GTSBoy]

On 3/16/2022 at 4:55 AM, 33GTRV said:

weigh a stock piston and pin assembly, then an aftermarket piston and pin assembly, you may be surprised. 

As in, the engine builder needs to put the crack pipe down because the weight difference of the pins is 3/5ths of f**k all?

[TurboTapin]

Happy we're all on the same page! He's a great and very well known builder in the area but I believe he's overly conservative to try and cover his ass. 

Thanks.