[mdabbott2009]

Let say if you were turn 8000rpm rpm is that the time to run a lightweight scat crank or will the standard weight crank work at this rpm.

Thanks guys

 

[Tom Mobley]

I'd be looking at upgrade cranks if you really want to run 8k. Is it a 350?

 

[cstraub]

Profiled counterweights and anything else to reduce windage will work in your favor. Big kickout on passenger side at pan rail.

 

[mdabbott2009]

Yeah be little 355 was thinking either scat 4340 or Howard's 4340. But didn't know if it didn't know if it needed to be a lightweight unit.

 

[bracketchev1221]

I would make it all as light as reasonable. I have a lightweight crank in my 540. It goes to 77-7800.

 

[Tom Mobley]

Scat 4340, probably one of these:

http://www.scatcrankshafts.com/#5 these are 48lbs, there's lighter weight ones but they're a lot more expensive.

And what Chris said, think early and often about windage. tray, big kickout oil pan, etc. avoid HV pump unless you really need for runniong external oil coolers, etc.

 

[mdabbott2009]

Well it's not for me but for a buddy. It's going in a derby car so I'm gunna go with the biggest pan we can fit probably do crank scaper and windage tray.

I'm thinking of try the piston squatters from blp has anyone used them? What kind of oil pump should be used with this?

Anyone have recommendations rods for it?

 

[Tom Mobley]

what's a derby car?

do you mean oil squirters? needed for endurance applications like NASCAR.

 

[71350SS]

What's a "derby car" ? do you mean a demo derby car ?

 

[mdabbott2009]

Yeah sorry should of put demolition derby car my fault

 

[Tom Mobley]

must be some sort of different demo derby. the ones I've seen use junker cars with stock engines. one of those cranks costs more than a whole demo derby car around here.

Are you sure you know what you're asking about?

 

[burrodebo]

Why would you turn 8k in a demolition derby?

 

[mdabbott2009]

Not for sure why but for some the guys that are around are making some good money and they get a trophy out of it.

We have small areas here so they use 5.13 gears or deeper and some times tour will rev them out too far.

I got asked to help and said yes would you build one if you got asked

 

[-SS454-]

man this thread has completely ruined the good old fun of a demo derby for me. To know there are cars running around with tens of thousands of dollars into them is just sad to me.

 

[Tom Mobley]

a typical engine built around that kind of crank will be an $8,000 to $10,000 or so deal.

 

[atrain]

Right now somewhere in Iowa, while you are building this 8000 rpm small block for your buddy, some dude got his hands on a stock late 70's wagon for free and is filling the frame with chain, welding a mongo piece of c-channel behind his bumper so no one can see, and welding up the spider gears. In the fist 3 or 4 minutes of the derby, while your buddy is revving the piss out of that 355, this good ol boy will line up old bessy and whilst hollerin' YEEE HAWWW, put your buddies radiator through his fan and into his water pump. Then with a resounding bang, cloud of steam, and hopefully accompanied by a fireball, your buddy is going to grenade his motor...and put up his flag...and watch the rest of the show from his smoldering car. That's how you win a derby...

 

[Tom Mobley]

perzackly.

 

[dogsridewith]

maybe this 8k rpm motor is a special present for Bessy?

 

[71350SS]

I would think the biggest cubic inch for the least money would be the hot tip.Maybe a 500 CI Caddy motor witha turbo 400 trans in a Caprice Classic station wagon.A torque monster to spin the earth is what needed, low speed grunt otherwise Bessy's gonna getcha.:clonk:

 

[mdabbott2009]

Trust me you can anything in a demo car they have these things called scopes that go down the frame to see stuff like that. And a wagon ant the hot ticket no more sorry there big slow can't get them to move around in a small area. Better off with a 98-02 Vic why full square frame under them and there nasty

I came to ask a question and learn so if ya mind let's keep to the topic . I'm 22 I would lIke learn some more stuff in my life so if ya mind don't say anything less it's about what I asked