Hi-test 403

[Kennybill]

Wow, dyno sheet says it all.

Dr. Dan's 478 - ClassicOldsmobile.com

Racing and High Performance - Dr. Dan's 478 - Dan and Bill have already posted this on FB but thought I'd put it here as well. 403 block with one of my 4.00 stroker cranks. BTR built with BTR Girdle and BTR ported Edelbrocks. Port matched Victor, 850 QF, 10.7:1, hyd roller running solid roller...

classicoldsmobile.com

 

[Olds 307 and 403]

I considered using the stroker pistons I have with that crank and 5.7" rods. Mark said it would wear the bores out quickly, so I guess 424 ci will do.

 

[Kennybill]

Yes, Smokey Yunic always said, "put the longest damn connecting rod you can"
Easier on the cylinder walls and the piston dwells longer at TDC.

 

[Kennybill]

All I can say is DrDan has a lot of cha-ching $$ in this engine. He must have faith in the 403s if built correctly. I'd shift this engine @ 5,400 and whatever it sings to it the traps, so be it. I'd error on the side of caution but that's just me.