[Fot] Billet crank and 1500 spitfire engine

[Barr, Scott]

Jerry Barker also did a nice 1500 crank for me, based on a stock unit.  It’s done with all the mods described in the Kas manual article on the topic.  Cross-drilled, etc.  I paired it some Carrillo rods and JE pistons for a nice solid bottom end that lasted well (but I still changed the rod bearings every 3 race weekends and rods and mains every 6 race weekends out of an abundance of caution).  I regularly spun it to at least 6,500.  Probably a bit more than that under Emergency War Power circumstances.

And Jerry later did a nice head for me to go with that bottom end.

Both are sitting in my storage unit awaiting the day I decide to put the old Spit Racer back on the street.  Some day.  After I retire.  Probably.

Scott (B.)

From: Fot <fot-bounces at autox.team.net> On Behalf Of Mike Harmuth via Fot
Sent: Wednesday, November 17, 2021 9:17 AM
To: FoTTriumph <fot at autox.team.net>
Subject: [Fot] Billet crank and 1500 spitfire engine

Hi FOTers, I'm toying with the idea of building a 1500 race engine for the spit. I have the Moldex billet crank in my 1296 race engines and like the smoothness created by the "ghost main" style. I know 1500's have a problem revving (and staying together) so I was wondering if anyone has successfully built a 1500 racing engine with one.

I'm looking because a couple of groups run vintage races in the northeast on very hilly tracks and I'd like more torque. The way they classify cars, a 1300 and a 1500 both compete in the same class. If I can get more stroke and not give up too much top end (like a different diff ratio "provides") I'd be willing to give it a try.

Has anyone found a solution to keeping a 1500 together to 7K (more than once)?

thanks
mike h
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