Increase 93 4L80E shift points?

[LC2NLS6]

Holley Sniper 454 with small cam and dual plane intake, using the stock TBI ecm to control trans, it shifts around 4200. Any way to trick the ecm to think the rpm is less so it shifts out higher? 212/218 cam .503/.503 lift. Should be able to pull to 5250 I'd hope. Or does it require a chip upgrade?

 

[JavaMan]

I thought 5000 was the redline with those engines due to crank velocity or piston velocity?

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[LC2NLS6]

You can spin a big block to 7000 rpm if you had the right heads and cam. She's already got 310,000 miles, 5500 won't hurt it now if it has enough oil pressure.