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Learning how to build Lotus Seven replicas...together!
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PostPosted: February 7, 2013, 2:00 am 
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Joined: July 6, 2009, 11:50 pm
Posts: 136
The frame continues to come together. I built the floor structure and welded the front and rear subframes to it.
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I used a scrap piece of MDF to create a temporary support to help position the main tubes as I welded them in. It worked very nicely. The trickiest part was positioning the front of the top tubes and the other pieces that make up the nose, but I think it turned out pretty good.
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I've also cut and welded in the supports between the front subframe and the main curved tubes, front sway bar mounts, center console tubes, and some of the cross tubes at the dash and firewall.
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The seat mounts are also finished. The drivers seat is on sliders while the passengers remains stationary.
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Last edited by Zac88GT on July 18, 2014, 8:02 pm, edited 1 time in total.

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PostPosted: February 7, 2013, 1:39 pm 
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Location: Victoria, BC, Canada
Looking good Zac, you can tell that you've spent a lot of time aligning and prepping to make your tube fitment accurate. It shows already in the frame.

The seats look quite low in the frame, its a bit hard to tell exactly where head height is, but how is the visibility with the seats that low?


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PostPosted: February 7, 2013, 9:08 pm 
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I think the visibility will be quite good. The camera angle is a little deceiving in those pictures. When seated, the top of the top tube is roughly 3" below my armpit.


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PostPosted: May 12, 2013, 7:03 pm 
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The main truss supports are now finished and the roll hoops are on.
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I've also fit the engine back in to fabricate the front engine mount, test fit the exhaust, and make some exhaust mounts.
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And just today I finished bolting the suspension back on with wheels so now i have a roller!
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I think the next steps are going to be getting the pedal box mounts in there and then I'll hang the steering column and make the shaft to the rack. After that will be mounting the shifter and making some sort of belcrank linkage at the trans to reverse the cable directions.


Last edited by Zac88GT on July 18, 2014, 8:08 pm, edited 1 time in total.

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PostPosted: May 15, 2013, 12:56 am 
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The quality of your work is impressive! I see welds at the tops of your roll bars, and I am curious about what's going on there? Also what its the measurement from the firewall to the dash tube?

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PostPosted: May 15, 2013, 3:12 am 
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The roll hoops aren't one continuous piece nor are they a thick enough tube to be SCCA legal. It would have been nice to have them one piece but I don't have access to that kind of bender and the autocross racing I do doesn't require them so these are more of form than function. It's 44" from the center of the tube behind the seats to the center of the dash hoop. The dash itself will be closer than the tube but it's nice and easy to step into.


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PostPosted: May 16, 2013, 10:09 pm 
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It looks like it would be. That's why I was curious. Mine measures 38.5". I based it off of measuring around myself, and yours is kind of making mine seem a little tight.

Thanks for the response.

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PostPosted: October 30, 2013, 4:21 pm 
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Any updates?

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PostPosted: November 3, 2013, 8:51 pm 
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I didn't do much work on it this summer but have recently picked it up again. I've put in the steering column, and shaft to the rack. The shifter linkage is also finished. I ended up using the Prelude shifter turned around backwards and welded the shifter base to the center console frame. To reverse the direction at the transmission for the select cable was easy. I removed the select shaft from the trans, extended the height and rotated the arm so the cable now attaches from the opposite direction as it originally did. The shift cable was a little more complicated. I built this belcrank system that bolts in place of the original cable mount.

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For the parking brake I had originally planned to use the Miata lever but the single cable that goes to the balance bar was too long to mount the lever behind the shifter and not long enough to mount it infront. Instead I used the Prelude lever which has a short threaded rod that the ballance bar sits on. Overall it's a much nicer lever, the positioning worked out great, and the Miata cables are a direct fit into it.

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The fuel cell, fuel pump, coolant overflow, and lower radiator mounts have also been completed.

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I spent 3-4 days stripping the Prelude wiring harness down the bare essentials that I'm going to need. I'm far from finished but I decided to put that away for a while until I get all the mounts for everything finished like the fuse panels, vacuum solenoids, charcoal canister, battery, ect.

The next thing I'm going to concentrate on are the mounts for the flex brake and clutch lines, and then I can bend up some hard lines to the master cylinders and proportioning valve.


Last edited by Zac88GT on July 18, 2014, 8:14 pm, edited 1 time in total.

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PostPosted: July 16, 2014, 2:35 pm 
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Zac88GT,

I saw in your model that you are using Miata 4 lugs, with 9" wide wheels. I've been trying to find wheels/tires for my application without much luck. My hubs are (will be) 5x114.3 (5x4.5). I noticed you managed 275's on a 15" wheel, which is awesome, but looking at the tire stores, I could not find any road legal tires that size. Did I miss some selection somewhere, or is this a track only setup?

I'm leaning towards 16" wheels on mine to be sure I can clear various donor car brakes and allow for more spindle clearance, but the only size I really can find a decent selection on tires is 205's.

So, my question is, did you account for needing street tires on your build? Should I worry about trying to put on tires wider than 205/45/16s for a mixed use car?


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PostPosted: July 16, 2014, 4:03 pm 
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The Miata wheel pattern is the same as the Nissan 240SX, a car popular with drifters. Type that model into a search engine and you'll find wider wheels. I's running 275s on 17 x 9 wheels from XXR, on Miata uprights. See sig for more info.

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PostPosted: July 16, 2014, 7:56 pm 
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Man, either I have to get a bigger computer or you need to start jpging your photos down to a reasonable size. If you knock 'em down to, say, 816 x 612 they'll be easier to see*, and if you get their memory demands down by a factor of a hundred (seriously, 25k each instead of 2.5M each) they'll load faster and be less demanding of RAM resources.

And now that that's out of the way...cool car, dude! Keep those photos coming.

*[EDIT: at least for those of us lacking 3,264 × 2,448 monitors]

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PostPosted: July 17, 2014, 8:33 am 
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JackMcCornack wrote:
Man, either I have to get a bigger computer or you need to start jpging your photos down to a reasonable size. If you knock 'em down to, say, 816 x 612 they'll be easier to see*, and if you get their memory demands down by a factor of a hundred (seriously, 25k each instead of 2.5M each) they'll load faster and be less demanding of RAM resources.

And now that that's out of the way...cool car, dude! Keep those photos coming.

*[EDIT: at least for those of us lacking 3,264 × 2,448 monitors]


+ "1200x800 pixels". last night, I tried viewing this thread on my android phone. oops. that popping noise you heard was my head asploding.

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PostPosted: July 17, 2014, 10:29 am 
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Tired2 wrote:
Zac88GT,

I saw in your model that you are using Miata 4 lugs, with 9" wide wheels. I've been trying to find wheels/tires for my application without much luck. My hubs are (will be) 5x114.3 (5x4.5). I noticed you managed 275's on a 15" wheel, which is awesome, but looking at the tire stores, I could not find any road legal tires that size. Did I miss some selection somewhere, or is this a track only setup?

I'm leaning towards 16" wheels on mine to be sure I can clear various donor car brakes and allow for more spindle clearance, but the only size I really can find a decent selection on tires is 205's.

So, my question is, did you account for needing street tires on your build? Should I worry about trying to put on tires wider than 205/45/16s for a mixed use car?


I'm not sure what you can find for 5x114.3, but there are lots of wide options for 15's in 4x100. The 6UL wheels come in 7", 7.5", 8", 9", and 10" widths, well, at least they used to. They are currently undergoing a redesign so I'm not sure what sizes will again be available but the 8's and 9's should be available this fall.

The 275/35/15's are Hoosier A6's for autocross. They are also what I'm currently using on my Miata and mounted on 15x10's. As far as street tires I'm planning to use the 15x8 with a 205/50/15 front, and 15x9 with a 225/45/15 in the rear. Nitto NT01's and a few other nice tires come in these sizes but I think I'm probably going to go with the new BFG Rival.

Sorry about the huge pictures guys. I've been meaning to go back through and scale them down and host them differently since I notice a lot of them are broken. Hopefully I'll get around to that this week and also include a massive update.


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PostPosted: July 17, 2014, 12:41 pm 
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Sorry about the huge pictures guys. I've been meaning to go back through and scale them down and host them differently since I notice a lot of them are broken. Hopefully I'll get around to that this week and also include a massive update.


Reduce them and upload them here. That is the preferred method. That way, 2-4 years from now, when someone wants to see what your work, the pics will be here.

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