Project Bottomless Money II Chassis Plans

 

 

 
 
 

 

Steve's Big Block Powered Chassis

D60 FR/RR, C6, 203-205 Doubler

 
 
 

I received quite a few requests for chassis blueprints that could accommodate a larger drive train.  You asked for it so here it is.

 First, all the components I used in my Project BMP will easily fit into this chassis, however I decided to design this chassis around full width axles (84" outside of tire to outside of tire shown).  To accommodate larger drive trains the new chassis features a taller & wider hood and a wider passenger compartment.  The lower frame rails were also re-designed to allow for a lot of foot room.  Here's some comparison shots of the new 2 seater chassis (BMP II) vs. the original 3 seater I recently built.  The front axle is pushed farther forward in the 2 seater chassis to accommodate the track bar up front and to keep the front axle in front of the motor.  With all the links being 34" long the new chassis would have an estimated wheelbase of 108.5" and better than a 90 degree approach angle front and rear with 39.5" tires.  Longer rear links would easily allow for bigger tires and a longer wheelbase if desired.

The part envelope shown in green is an inline 6 cylinder engine, 5 speed transmission and Dana 300 transfer case from a Jeep YJ (one of the larger engine options out there).  A raised hood or hood bulge would be required and the stock radiator would need to be rear mounted (or a smaller one sourced). A custom 26 x 19" double pass radiator would fit up front. In addition, the belly pan of the chassis is left wide open to allow the transfer case and transmission to be removed from the vehicle without pulling the engine. Other engines that would fit easily: Pontiac 3.8l V6, Chevy 4.3l V6, Chevy 4.8/5.3/5.7/6.0/LT1, Ford 5.0l to name a few.  

The front axle could be located with either a 4 or 5 links (one of them being a trac bar), the rear easily fits a double triangulated 4 link.  There is room for a rear sway bar on the rear axle if you desire one,  the one shown is approx. 36" long.

Isometric views comparing the BMP II chassis to the original BMP chassis.  In back of the BMP II chassis I mocked up a stock YJ radiator and a 20 gallon fuel cell (approximate).  Basically BMP II is a compact 2 seater with lots of room.

Here are a few views without the body panels.  The drive train shown is my existing 1.6l with a Samurai Radiator, dual Toyota transfer cases, a 5 speed manual transmission and an 8 gallon fuel cell.  As you can see the engine bay is very roomy and should provide ample room for larger motors.

Specs:  Outside of door bar to outside of door bar is 55.6".  Belly to highest point on the roof is 55" and length from front bumper to rear most tube is 133.6". Estimated chassis weight is approx. 300lbs as shown.

Suspension Information: For further suspension information see the FAQ.

Comparison pictures, BMP II in front

The plans you will receive are laser printed on 11 x 17 sized sheets of paper.  I have broken down the entire chassis into stages and include a suggested order of assembly guide to help you build your chassis.  The guide lists how I would tackle the chassis build and notes when you should mock up major systems and suggests other systems that need to be considered at that stage.

Things to keep in mind:

1. I make no warranties of any kind for the performance or durability of this chassis.  You are buying plans only. If you chose to fabricate something using these plans you assume all risk in the fabrication and operation of the project.

2.  You will need a basic knowledge of tube bending and access to a tube bender, welder, chop saw, etc. Access to a plasma cutter or cutting torch would be very helpful but is not required.  The chassis is designed around 1 5/8 tubing with a bend radius of 4.5"***.  Larger tubing  or bend radii could be used with some adjustments to the initial tube lengths.  there are no bends over 90 degrees.

*** It has been brought to my attention that the 4.5" radius die is no longer available from JD2. See the FAQ here for information on compensating for different die sizes. It is actually a very quick and easy adjustment to accommodate larger bend radius dies.

3.  The plans are meant to be a guide.  Since there is no way to get the bends to match the plans %100 expect to have to make small adjustments.  The plans do have suggested cut lengths and start points for the bends.  It will be your responsibility to cope the tube ends.  In spots where there are straight braces I usually provide a recommended tube size and length, however in most cases your best bet is to measure the distance between the nodes to determine the actual cut length.

4.  The plans only cover the dimensions of the basic chassis.  This means gussets, mounting tabs, suspension related mounts on the axles, body panels, component mounts, and all interior mounting tubing, etc are your responsibility. 

5.  I will include a recommended list of material for the basic chassis.  You may want to purchase additional material if you would like to leave extra material on the cuts or if you feel you may have to re-do a section of tubing.

For costing purposes I used approximately (8) 20ft sticks of 1.625 x .120 DOM, and (2) 20ft sticks of the following: 1.50 x .095 and 1.50 x .120 for the main chassis bracing. To save money you can get away with using HREW for any piece of tubing that does not contact rocks.

The plans cost $110 which includes all drawings on 11 x 17 paper; shipping is included in that price to any confirmed address in the Continental US. If you would like two different sets of plans you can select the pick 2 option; please specify the second set in the notes field. I do not offer electronic versions. See below for international purchasing instructions. As a bonus I also throw in 4 free DVD's: BTG Volume 1, 3, 3.5 & 4 so you can see what your new chassis can do. the bonus DVD offer is only available to buyers in the US.

All packages ship USPS, please allow 1-2 weeks for domestic orders although actual ship times are usually much faster.

Note- you do not need a PayPal account to use your debit or credit card.

BMP 2 Seater Chassis Plans Shipping Options

 

International customers please read -

If your mailing address is in Canada, Australia or New Zealand you can pick that option from the drop down box above. The customs form number you will receive will serve as a tracking number and as of July of 2015 I have had all packages sent to those countries track to their destination as shown in the screenshot below. 

All other orders going to any country not listed above will need to submit payment as noted below. The customs form number you will receive will show when the package is dropped off at the US postal office and when it leaves US customs but I cannot guarantee it will continue to update with your package status once it gets handed off to your local postal service.

That said, I have only had two packages go missing in the last fifteen years and a few that have required upwards of 8 weeks to reach their destination so my track record is really good. I can provide the customs form number which will show the date the package was submitted to the US postal service but once it leaves the US that number no longer gives any useful information.

 You can enter the customs form number into the tracking field on the USPS website or here.

Payment directions for orders going to any country not listed in the drop down box above:

 I require payment via PayPal using the "Send Money" or "Gift" option. Once you manually log into PayPal you can select send money, enter my PayPal address: chris@azrockcrawler.com. Next you should then see two options for what the money is for, select the "I'm sending money to family or friends." (see picture below). Some countries may show this as a "gift" or "personal payment" option either of which are also acceptable.  If you do not have this option I cannot ship to your country.

Chassis plans for international customers are $140 shipped anywhere in the world. Once you have made payment, please send me an e-mail to chris@azrockcrawler.com and list the items you want as well as your shipping address.

Please make sure to note the items you want and double check your shipping address. Shipping times vary so I always tell people to allow up to 8 weeks for delivery (40 working days). I have had packages reach Australia and Russia in as little as a week but there are always the occasional straggler.  If your order still hasn't arrived after 8 weeks I can give you a discount on another duplicate order.

If you have any questions feel free to send an e-mail to sales@azrockcrawler.com,  

 
 
         
 
 

This work in progress is being built here in Phoenix, AZ by Bill Guier. He had a local shop fabricate the chassis from the plans.

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The chassis was modified for more passenger room.

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The buggy will be powered by a 472 cu/in Cadillac motor which will feed a TH400 and D300 combo.

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A pair of Rockwell axles shod with 44" Boggers will eventually make their home under this rig.

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