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Flat plane 180 Crank Barn Find SB Chevy from 1959 #2653057
05/07/19 04:33 PM
05/07/19 04:33 PM
Joined: Oct 2003
Posts: 6,904
my own world
theraif Offline OP
master
theraif  Offline OP
master

Joined: Oct 2003
Posts: 6,904
my own world

Re: Flat plane 180 Crank Barn Find SB Chevy from 1959 [Re: theraif] #2653058
05/07/19 04:44 PM
05/07/19 04:44 PM
Joined: Oct 2010
Posts: 2,233
Ambridge, Pa.
R
rickraw Offline
top fuel
rickraw  Offline
top fuel
R

Joined: Oct 2010
Posts: 2,233
Ambridge, Pa.
I wouldn't want to b around if those brass weights came off. Pretty impressive power for what it is.

Re: Flat plane 180 Crank Barn Find SB Chevy from 1959 [Re: rickraw] #2653086
05/07/19 05:54 PM
05/07/19 05:54 PM
Joined: Dec 2009
Posts: 18,401
in a cattle trailer down by th...
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Guitar Jones Offline
Paddle faster! I hear banjo music!
Guitar Jones  Offline
Paddle faster! I hear banjo music!
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Joined: Dec 2009
Posts: 18,401
in a cattle trailer down by th...
Neat piece of history.


I raise chickens, so I am literally a chicken tender.

The Scamp is sold, now just two old trucks and one newer one.
'92 D250 Club Cab CTD, 47RH conversion, pump tweaks, injectors, rear disc and hydroboost conversion.
'74 W200 Crew Cab 360, NV4500, D44, D60 and NP205 divorced transfer case.
2019 1500 Long Horn Crew Cab 4WD, 5.7 Hemi.
Re: Flat plane 180 Crank Barn Find SB Chevy from 1959 [Re: Guitar Jones] #2653100
05/07/19 06:27 PM
05/07/19 06:27 PM
Joined: Jan 2003
Posts: 18,261
So Near, Yet So Far
topside Offline
I Live Here
topside  Offline
I Live Here

Joined: Jan 2003
Posts: 18,261
So Near, Yet So Far
Gotta wonder if Smokey Yunick had his hands on that...

Re: Flat plane 180 Crank Barn Find SB Chevy from 1959 [Re: theraif] #2653158
05/07/19 09:16 PM
05/07/19 09:16 PM
Joined: Aug 2003
Posts: 39,976
Bend,OR USA
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Cab_Burge Offline
I Win
Cab_Burge  Offline
I Win
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Joined: Aug 2003
Posts: 39,976
Bend,OR USA
Several comments caught my attention, like E bay purchased twenty + yrs ago confused
The first stroker motor I had was a 1959 383 motor that had a 413 crank in it that had been welded up and offset ground to make the stroke 5/8 longer than stock, I was told it was a 454 C.I.. confused I didn't have the tools or skill to verify the stroke back then whiney It had steel plates welded onto the counter weights for balancing also, not bolted on brass weights work Old times, old ways work
That exhaust sounded a lot different than other 180 degree crankshaft 4 stroke motor I've heard at the drag races years ago, those where 426 hemi motors raced in modified eliminator in either 1970 or 1971 at the NHRA Winternationals. One car had a set of 180 degree headers and the other one (both where 2nd gen Baracuda) had the 180 degree crankshaft, both cars sounded like they had six cylinder motors in them confused shruggy
Lycoming aircraft makes a flat 8 cylinder opposed air cool aircraft motor that is around 720 C.I. that made 400 HP at or close to 2600 RPM N/A. , I think they have a 180 degree crankshaft in them and they don't sound like a six cylinder motor like those hemi motors did confused
The thing to remember about a 4 stroke 180 degree crankshaft motor with 8 cylinders is two cylinder will be firing at the same time to get all eight cylinders to make the complete four strokes in 720 degrees of crankshaft revoltion, correct work
I know guys that would have killed to get that Chevy motor back in the day shruggy

Last edited by Cab_Burge; 05/07/19 09:19 PM.

Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
Re: Flat plane 180 Crank Barn Find SB Chevy from 1959 [Re: Cab_Burge] #2653222
05/07/19 11:07 PM
05/07/19 11:07 PM
Joined: Feb 2008
Posts: 635
Central TEXAS!!!!
sr4440 Offline
mopar
sr4440  Offline
mopar

Joined: Feb 2008
Posts: 635
Central TEXAS!!!!
You can buy a flat plane kit for a ford and chevy today. I had one on the dyno and that thing accelerated stupid fast. LOL

https://steviescrazygarage.com/flat-plane-technology/


Joe

Last edited by sr4440; 05/07/19 11:10 PM.

Without Data, you’re just another guy with an opinion.
Re: Flat plane 180 Crank Barn Find SB Chevy from 1959 [Re: sr4440] #2653316
05/08/19 09:52 AM
05/08/19 09:52 AM
Joined: Apr 2003
Posts: 3,256
Tulsa, Oklahoma
340Cuda Offline
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Tulsa, Oklahoma
I was also surprised at the sound of this engine.

I saw Wiley Cossey run a 1967 Plymouth at I think the 1967 Nationals in Indy with a "flat crank". It sounded like an Indy car and I was told tried to shake everything off the car that was not safety wired.

Re: Flat plane 180 Crank Barn Find SB Chevy from 1959 [Re: 340Cuda] #2653570
05/09/19 02:29 AM
05/09/19 02:29 AM
Joined: Jan 2003
Posts: 16,375
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dogdays Offline
I Live Here
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Joined: Jan 2003
Posts: 16,375
And there's the rub. The flat crank engine has real balance problems and for years the upper limit on flat crank V8 displacement has been less than 300 cubic inches. If you look at all the racing engines and ultra high performance V8s with 180 degree cranks, you find most of them at 200 cubic inches or close, or less. And yes, safety wiring is necessary for most of these engines, although I don't think the new Ford engine is safety wired.

The flat crank 8 is exactly like two four cylinders at right angles to each other. Four cylinders have inherent shaking problems. When they get much bigger than 2 liters they will have a balance shaft to counteract the shaking. So two of them at right angles will have even more severe problems. The advantage is it's easier to do ram tuning with a four cylinder because of the evenly spaced exhaust pulses. The disadvantages outweigh the advantages in most every case, except for the Indycar and Ferrari V8s.

R.







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