rear engine kit car question


rscamaro305
11-07-2003, 10:35 PM
Hey guys, i'm new to this forum and the kit car scene and i was wondering if you could help me out. I recently bought a kelmark kit car and it is set up for a rear engine application. i was wondering if i could use a standard front wheel drive transverse engine set up in the back of my car. I personally see no problem with this, but i also don't know much about rear/mid engine cars. Thanks a lot for the help.

-FROG-
11-10-2003, 05:03 PM
What chassis are you using?

rscamaro305
11-10-2003, 07:51 PM
I was planning on building my own tube frame

-FROG-
11-11-2003, 12:14 AM
Do a search on GOOGLE or another search engine for "Replicas" or "Kit Cars" and you will see how people build them and what motor/tranny combo's are available. Trust me, theres alot of stuff out there but it takes a bit to find it all.

ANTHONYZERO
03-22-2004, 06:49 PM
I have seen a Ford Focus zx3 with the engine in the back and a honda civic hatchback with the same so I know it's do-able. From what I have seen the problem would be relocating the fluids and the gas tank seeing how the engine would be sitting on it. You would also need to replum your radiator to keep it upfront and setup a different set of hubs for the rear to hook up your shafts. A FF setup is pretty self-contained so moving it around is possible (I've been doing alot of research too) but if you ever build the car it would handle like a porche...not too bad at all.

ANTHONYZERO
03-22-2004, 06:53 PM
Another thing I forgot to mention. The Ultima GTR is a mid-engine rear-wheel drive car. It is considered a kit car but it is pretty much a race car that IS STREET LEGAL. www.ultimacars.com <- Check it out. It uses a Chevy small block and a porsche transaxle. Lots of info about this car on the web that could help with your design.

59elcooldsuv
05-14-2004, 02:42 PM
How much space do you have behind the bulkhead that separates the passenger compartment from the drivetrain compartment? Measure from the current axle centerline to the firewall. Then measure the engine/transaxle package that you want to use.

I seem to recall that Kelmarks were designed for VW chassis & drivetrain. May not be enough space behind the seats. Remember that you'll want enough room in front of the engine to reach the spark plugs and not have the exhaust heating up the firewall behind your elbow.

Also, measure the total width of the rear suspension from axle flange to axle flange & compare that with the one you want to install. If it's wide enough to make the tires hit the fenders you might be tempted to shorten the half shafts, and that's where it becomes outrageously expensive. You prob don't want to install, for example a Buick V6 into a cradle with Volkswagen suspension. you'd want to use the entire Buick setup just as Buick engineers designed it. That way you minimize the fabrication and the Buick axles are designed to take the power that the Buick can make.

Alternatively, you might be tempted to widen the rear fenders. This would be easier and, if done carefully, might make for some major styling points - like a Kelmark on steroids.

On ChevyTalk.com there is a BBS for Corvairs enthusiasts. In there you'll find people who have converted Corvairs from rear engine to mid engine. Some of them may be able to give you useful advice. Also Google for Corvair V8, corv-8, mid-engined Corvair & stuff like that.

check these out:
http://www.pro-touring.com/featured_cars/Corvair/Phillip_West_Corv8/phillip_west_corv8.htm
http://www.automotive-links.com/mak/che/vai.htm

The most important things you need to know about midengined cars concern the shift linkage and the cooling. The shifting is easiest to handle by using an automatic with control cables. If you want a standard then I wish you luck.

If you're going from a VW or Corvair ingine to a water-cooled engine then you'll have to fabricate an entire cooling system. If the Kelmark has a very low nose (I can't recall right now) then you will want to consider a Corvette radiator that sits at an extreme angle. You'll prob fabricate duct work to channel the air from the grill to one side of the rad and from the other side to outlet vents behind the front wheels or in front of the windshield. You'll have to run stainless steel tubes from the engine to the rad, either thru the center tunnel or under the rockers below the doors.

Otherwise you might consider a low, wide radiator in the back with a few electric fans pushing air thru it. This will require venting the transom and you'll have to wrap the entire exhaust in insulation to keep it from heating your radiator.

One of the biggest complaints from folks who have built midengined Corvairs has always been about cooling. Remember that your cooling needs are directly proportional to your horsepower level.

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