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Turn circle track car into road racer?

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10K views 21 replies 9 participants last post by  70BossRanchero  
#1 ·
I'm starting to dream up my next adventure... I was first thinking about getting a factory stock dirt car. But now I'm thinking about trying my hand at SCCA road racing. They even have some events at Circuit of the Americas F1 track nearby where I live. Honestly, for me 60% of the fund is building the car. 30% of the fun is being at the event. And maybe 10% of the fun is the actual driving. I like the tinkering and building part a lot. I know I'm not nor ever will be a professional racecar driver.

What came to mind for an interesting road race car build would be to take an old circle track street stock chassis and hang a newer body style set of sheetmetal on it. This seems like a fairly inexpensive way to get a racing chassis. It would basically look like a Nascar. It seems that in SCCA is that I have complete freedom to fabricate whatever suspension I want. So starting with a circle track chassis seems like it would be a good place to start building on. And the exterior is just sheetmeetal.

I'm curious about this because of the few events I've seen, nobody went in this direction. Like they all seem to take an expensive production car, put a rollcage in it and then start to tune the suspension.

Am I missing something? I've just started to brainstorm this idea so I'm not sure if there is an obvious reason why that would be a terrible way to build a road race car.


Thanks,
Sal
 
#2 ·
Most people want to buy rather than build. SCCA seems to kinda attract that group of people. It's faster than years of trail and mostly error at any rate. I'd look at safety rules. There may be issues with getting a dirt track type car to pass the rules for the cage and interior drivers tub and foot box.
If you can manage some changes it seems like your plan could go well.
 
#4 ·
The problem I see is that weight placement, and camber gain on a circle track car is designed to go left. Control arm length and mounts are positioned to put the roll center to the left of chassis center. This makes them turn left well, and not turn right very well.

This can be changed, but to do it well requires a chassis geometry program, and the patience to enter the points accurately. Now if you started with a road race chassis, everything would be mounted in the correct place.

Sent from my moto x4 using Tapatalk
 
#5 ·
The factory stock or also sometimes called bomber class the OEM pick up points are supposed to be untouched. Although I’ve think I seem to remember but not completely sure just off the top of my head that it’s possible to cut them off and move them. Seems like I’ve seen or heard of that before. That does sound like something a racer might do.
 
#6 ·
There are so many things on even the lowest level of circle track car that are biased to turn left, I think it would be much easier to make a road racer from an OE stock car than it would be to undo all the things done to a circle track car to make it turn left only.
 
#9 · (Edited)
I applaud you for wanting to step out and do something differently, it's what has made auto racing so interesting for so many years. Agreeing with jaw22w, I would begin with a bone stock production car such as a Mustang, then either copy and fabricate...... or purchase the myriad of go-faster parts that have been designed by professionals. This could be a fun-fun-fun project......:thumbup:....... I would pay very close attention to their rules concerning construction of a cage. Not paying close attention to the rules is where most racers and I (as a technical inspector) butted heads.
 
#10 · (Edited)
There are a number of late model circle track cars available and if you are a serious cash buyer the sellers would be glad to talk to you and provide an inspection of the car.

I think it would be a capital idea to do that and we here in the PNW have a number of events you could participate in. things like track days at the ridge motorsports track as well as solo events.

I don't think you would be competitive as a national car as those are the big bucks guys that buy a new car and prepare it for racing.

Great fun and the SCCA guys are helpful.

Sam

Here is one already donehttps: https://www.facebook.com/marketplace/item/858507064522608/

Another option https://www.facebook.com/marketplace/item/2415703348692020/

https://www.facebook.com/marketplace/item/420791771804512/
How about a Legend


All kinds of used stuff out there ust need to go shopping..
 
#12 ·
Sal, go on over to Lockhart and have some BBQ for me. I grew up in Austin and miss me some good vittles being here in N.C. For now I make my own...
If you need any services near A-town let me know. I know tons of people back there. There are some world class car builders out there.
 
#13 ·
I'll take you up on your offer!

I haven't found a good engine builder around here. Got any advice?

My last build I went with South Austin Machine shop to do a set of heads... they used to be on South Lamar but now they are down off 71. Their shop was really dirty. I had a set of heads resurfaced and when I got them home I checked them with my straight edge and feeler gauges and they weren't flat. I asked whether they checked them and they said that they just put them on the machine and assume the machine is flat. Not exactly confidence building...
 
#15 ·
the giant belt sander resurfacing machines can wear so much that they won't make a flat finish, they are good enough for many applications but not the head gasket. Would be odd for a millor a bed grinder to produce a not flat surface cut.
 
#16 ·
Somewhere I have a photo of my nephew's machine...

It's in big demand because, unlike the machines with a horizontal cutter on a wheel his grinder can do heads with ceramic inserts too. A lot of diesels have these.

He can use the same machine to do flywheels too. The big problem is that there's 12,000 miles of ocean between Austin and his shop on the Gold Coast.
 
#19 · (Edited)