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Learning how to build Lotus Seven replicas...together!
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 Post subject: Heaviest Locost ever
PostPosted: Thu Dec 11, 2014 6:23 pm 
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Joined: Thu Feb 08, 2007 4:35 pm
Posts: 48
Location: Atlanta Ga
http://2jzlocost.wordpress.com

I will try my best to document if I can squeeze motor and a half into Lotus 7ish frame. This should be fun!

Image

I am familiar with the Locost and tinkering in general, no so much with 3.0 liter ironblock Toyota engines.
But I have a feeling that I will.

Thanks for watching!

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 Post subject: Re: Heaviest Locost ever
PostPosted: Thu Dec 11, 2014 6:49 pm 
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Joined: Mon Feb 18, 2013 10:57 pm
Posts: 194
Hey hrk,

Welcome to the club. Glad to see another atlanta build. Are you going for street legal?

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1 year of neglecting my wife and children and all I got was this car... Totally worth it.
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 Post subject: Re: Heaviest Locost ever
PostPosted: Fri Dec 12, 2014 8:44 am 
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We are Slotus!
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Joined: Tue Oct 06, 2009 9:29 am
Posts: 5330
Location: Tallahassee, FL (The Center of the Known Universe)
Good mornin' Heikki!
I'll be looking forward to your build.

I might dispute that "Heaviest" claim... I've got a Ford 302 with cast iron block and heads in mine. :mrgreen:

Maybe our two "fat-boys" can run together up a hill one day soon!

:cheers:
Regards-
JDK

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JD, father of Quinn, Son of a... Build Log
Quinn the Slotus:Ford 302 Powered, Mallock-Inspired, Tube Frame, Hillclimb Special
"Gonzo and friends: Last night must have been quite a night. Camelot moments, mechanical marvels, Rustoleum launches, flying squirrels, fru-fru tea cuppers, V8 envy, Ensure catch cans -- and it wasn't even a full moon." -- SeattleTom


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 Post subject: Re: Heaviest Locost ever
PostPosted: Fri Dec 12, 2014 11:40 am 
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The voice of reason
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Joined: Thu Jan 10, 2008 4:47 pm
Posts: 6104
Location: Massachusetts
With a heavy motor and the willingness to really use it those bottom engine bay tubes are under a lot of stress. It's a big help for the frame if that long diagonal on the side of the engine bay is 2 diagonals meeting near the engine mount. I did some numbers in an FEA program the other day and the stress on those bottom tubes was right up to the yield point with a heavy motor. I think that was with a 500 lb. weight on one side, which you would see under acceleration and over bumps pretty easily.

You could add another diagonal to make an "X" or partial "X" and then drop a tube down from the center of the "X"...

It will be a nice sounding Locost, did you get tired of Turbos?

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 Post subject: Re: Heaviest Locost ever
PostPosted: Fri Dec 12, 2014 2:26 pm 
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Joined: Thu Feb 08, 2007 4:35 pm
Posts: 48
Location: Atlanta Ga
Thank you Dave, although I have been here for some time. I heard we missed each other at Ambush this September. I heard your car was great! I see it in your building logs.

JD, we would do that, if you ever drove any hillclimbs ;P

Horizon, yes those lower frame rails flex a lot. Much more than any motor mount would. I leveraged motor with jackstand handle to inspect motormounts and was in awe how much the support points moved. Since then the motor has been stressed member of the frame. This second one will be done the same from the beginning. Well balanced Miata motor did not transmit (new) vibrations to the frame, I would think smooth six will be same or even better.
I like turbo's a lot and that is the main reason for engine choice.

The last straw breaking the resistance was participating DIYAutotune Megasquirt day this autumn and witnessing this:
https://www.youtube.com/watch?v=m-SOUzyAPfI
and after using higher gear to reduce torque, this
https://www.youtube.com/watch?v=SirpOKTYEIM

On a same dyno where my car pulled 320 hp a week and a half before that day.
I was goner.

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 Post subject: Re: Heaviest Locost ever
PostPosted: Fri Dec 12, 2014 9:09 pm 
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The voice of reason
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Joined: Thu Jan 10, 2008 4:47 pm
Posts: 6104
Location: Massachusetts
Quote:
Maybe our two "fat-boys" can run together up a hill one day soon!


I'm gettin me 2 four cylinders in my car just like JD, so I want to join in the fun too. :cheers:

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Marcus Barrow - Car9 an open design community supported sports car for home builders!
SketchUp collection for LocostUSA: "Dream it, Build it, Drive it!"
Car9 Roadster information - models, drawings, resources etc.


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