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Author Topic: Rear Engine Modified Roadster Build  (Read 159991 times)
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maguromic
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« on: February 23, 2009, 11:33:56 PM »

I am helping a very good friend build a rear engine modified roadster.  Along with my self their will be a about 10 others working on this build.  We have a diverse background in racing many are from the old IMSA and Trans Am days and a few from Indy Car and LSR.  We even have a secret LSR professional that holds a few records even one on an electric scooter helping with the composite work. LOL

Be patient as this will be a slow build as we all have day jobs and we will be working on this on a part time basis.  The build will be done at Sears Point so if anyone wants to come by or event get dirty and work on it, send me a PM and we can meet up.

Tony
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John Noonan
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« Reply #1 on: February 23, 2009, 11:55:24 PM »

Good luck and I look forward to the build pictures and story.. cheers

J

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maguromic
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« Reply #2 on: February 24, 2009, 02:09:05 PM »

I will start with the back of the car since we have the body and trans picked out.

The cars transaxle will need to be modified for the air shifter.  Most likely the case will have to be modified on the bottom to mount the barrel and the air shifter.  Originally this transaxle was designed as an “H” pattern so the shift forks will also need to be modified for the air shifter.  Lots of final gear ratios are available all the way to 2.20 to 1 without going to overdrive.  This setup will also help lower the engine in the car to get  the CG low.


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Glen
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« Reply #3 on: February 24, 2009, 02:12:02 PM »

What is the trans axle out of ?
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maguromic
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« Reply #4 on: February 24, 2009, 02:20:04 PM »

The trans is out of Paul Gentilozzi’s GTS Oldsmobile IMSA car.  Chris Weismann and Bob Riley designed it.   According to Chris its good to about 1500HP, so should be able to take all the HP we can throw at it.   Unless the car runs fuel or turbos its HP limited.
« Last Edit: February 24, 2009, 02:24:49 PM by maguromic » Logged

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« Reply #5 on: February 24, 2009, 02:27:35 PM »

Hey Tony. Make sure you do lots of pictures of the trans axle install. I have a Weisman and have been toying with the idea of a 'liner or rear engine modified too.
Does yours have a bevel gear in it?
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maguromic
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« Reply #6 on: February 24, 2009, 04:18:39 PM »

Hey Tony. Make sure you do lots of pictures of the trans axle install. I have a Weisman and have been toying with the idea of a 'liner or rear engine modified too.
Does yours have a bevel gear in it?


I have not started to design the frame yet, but will post pictures as I go.  Riley redesigned the mounting points as the cases were cracking when the car was jumping in the corkscrew at Laguna and on the transition at Daytona.  It has a small bevel gear in it that Weismann builds in house.  Is yours the Indy box with the 12-bolt ring and pinion similar to the one Al Teague used? 

Tony

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javajoe79
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« Reply #7 on: February 25, 2009, 11:29:41 PM »

Man I will have to come by when I get back to Cali in April. What shop are you in at Sears? I used to work as the fabricator for the dreaded Russell racing. I quit when the new owners pissed me off. I still know a bunch of guys there though.
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« Reply #8 on: February 25, 2009, 11:50:22 PM »

Man I will have to come by when I get back to Cali in April. What shop are you in at Sears? I used to work as the fabricator for the dreaded Russell racing. I quit when the new owners Plymouthed me off. I still know a bunch of guys there though.


We are across the street form Lynx Racing, its the first shop on the left as you come in to that side of the track.  I don't get up there as much as I like to but send me a PM when you want to come and I will meet you up there.  We were working out of Dodge's shop, but if you know him then you know how packed that shop is.

Tony
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« Reply #9 on: February 26, 2009, 12:30:59 AM »

I'm not understanding which shop. You are in the lower shops?   Lynx was where cameron karting was/is right?  Are you in Travis Lewis' shop?
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maguromic
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« Reply #10 on: February 26, 2009, 01:41:10 PM »

Yep, we are on the lower side.  Lynx and Cameron are in the same shop.  Cameron runs the Lynx Formula Atlantic team, we are two doors from Travis's shop on the same side.

Tony 




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« Reply #11 on: February 26, 2009, 01:50:48 PM »

Started on the design of the front suspension.  These are some napkin drawings done by Steve Conover to get an idea before we move forward.



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« Reply #12 on: February 26, 2009, 02:38:34 PM »

 Ok that is why I was confused. Lynx hasn't been a team for a few years. They just have Karts in there now.
 So you are next to Andy Gillespie's shop?

 Nice drawings too.

 What are your plans for the body? Fiberglass, aluminum.....?
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« Reply #13 on: February 27, 2009, 02:16:30 AM »

I'm wondering if you're going to try a lay-down cockpit.  My RMR isn't caged yet and I've got some ideas of an arrangement that would let me get in and out with a Hans device on.  It's a tough decision to make, given we are all heading down a new path, so to speak. undecided

Looking forward to more pics of your project...thanks for putting it up!

JimL
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maguromic
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« Reply #14 on: February 27, 2009, 01:30:41 PM »

Still playing around with the seating position.  We have been talking with Jim Downing and his brother in law who designed the HANS about the angles that are acceptable.   Most likely it will be a seating position a  few degrees (3-7) lower from what current Indy cars are using.  The roll bar will only be about 3" higher than the cowl.  The body will have a contoured step from the body proper to the straight section of the body (this area will be about 20" tall, this will let us get the driver low as possible.  Very similar to the Panoz Indy car around the driver shoulder area.  Still its a bunch of compromises to get everything to work together.

Tony


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