RCR Spline dimension

[Paul Proefrock]

Hoping one of the RCR guys can help me with a couple dimensions. Planning an RCR build and doing some preliminary work.

The RCR GT40 frame has a spline that runs fore and aft. Can anyone supply me with the ID and OD dimensions of the aluminum tube that makes up this spline? This is a shot of the front of it in the nose area

Thanks

Paul

 

[Adam]

Hoping one of the RCR guys can help me with a couple dimensions. Planning an RCR build and doing some preliminary work.

The RCR GT40 frame has a spline that runs fore and aft. Can anyone supply me with the ID and OD dimensions of the aluminum tube that makes up this spline? This is a shot of the front of it in the nose area

View attachment 134969

Thanks

Paul

It’s 2”x 6” with .25 wall

 

[Jim Albright]

It’s 2”x 6” with .25 wall

Paul,
My RCR Lola should be the same - it's 6 inches by 1 3/4 inches (ID)

Best regards,
Jim

 

[Paul Proefrock]

It’s 2”x 6” with .25 wall

Adam, that would make the ID 1-1/2" Are the coolant tubes then substantially smaller than 1-1/2" I understand the interior is full but really confused by all this. Is the 1/4" wall correct?

My RCR Lola should be the same - it's 6 inches by 1 3/4 inches (ID)

Jim, a 1-3/4" ID would accept a 1-1/2" coolant tube with some type of insulation wrap but a tight fit.

I don't have direct access to an RCR build right now so I don't know what size the coolant tubes are. Trying to figure out if I can snake a 1" link tube between the two fuel tanks - it would have to snake under the coolant tubes to be effective and not sure if the coolant tubes can be raised any inside the tunnel/spline

Really appreciate your help on this

Paul

 

[Adam]

It could be closer to .125 wall. Let me check again tomorrow.

 

[Jim Albright]

Adam, that would make the ID 1-1/2" Are the coolant tubes then substantially smaller than 1-1/2" I understand the interior is full but really confused by all this. Is the 1/4" wall correct?

Jim, a 1-3/4" ID would accept a 1-1/2" coolant tube with some type of insulation wrap but a tight fit.

I don't have direct access to an RCR build right now so I don't know what size the coolant tubes are. Trying to figure out if I can snake a 1" link tube between the two fuel tanks - it would have to snake under the coolant tubes to be effective and not sure if the coolant tubes can be raised any inside the tunnel/spline

Really appreciate your help on this

Paul

Paul,
RCR did a fuel tank cross connect line on mine just aft of the lower bulkhead behind the seats. It's tight, but I have all hoses routed above the level of the floor pan so nothing will catch on any road debris. The attached pics are the before and after. I also had RCR install a layer of insulation over the spine inside the car.

Best Regards,
Jim

 

[Brian Kissel]

Per my discussion with Jim about his Lola, I went to RCR armed with some 1.5” tubing and some heat dissipating sleeving . I use this at work and it works great. Ken posted about it in page 41 post 808 on his build thread here.

Ken's SLC build thread

The car arrived September 27th. Here is shot of my Mom and Son sitting in it just after it was unpacked.

www.gt40s.com

I can verify it does fit in the RCR chassis that I checked.

Regards Brian

 

[Paul Proefrock]

Thanks, Brian. Curious on a couple points
1) what is the sleeving you used? Brand? Part No?.

2) how much difference is there between the RCR frames of

• GT40
• Lola
• GT-R
• SLC

Are they all essentially the same with some dimensional changes? I've looked for pictures of the various frames however Fran's site doesn't go into this detail and this site makes it very difficult to search photos.

 

[Paul T.]

Paul, I'm in the process of doing mine now and a 11/2 tube with insulation and shrink sleeve does fit. I've got a lot going in mine. Won't have room for a crossover. If I do one it will be at the rear bulkhead.

 

[Brian Kissel]

Paul, I like Ken purchased mine from McMaster Carr. Part number 7569K15

McMaster-Carr

McMaster-Carr is the complete source for your plant with over 595,000 products. 98% of products ordered ship from stock and deliver same or next day.

www.mcmaster.com

It is blue and with the 1.5” tubing fits nicely. It is a heat dissipating sleeve. There are other sleeves out there, but this one helps dissipate the heat. I had thoughts of using 1-3/4” and make the tubes oval. As far as the RCR spines, I believe they are the same height and width among the cars. You can verify with Fran. They are closed until January 3rd.
Regards Brian

 

[Klaf]

I used that sleeve in my RCR gt40. Just make sure you put the brake lines in first. I found it easiest to put the sleeve through the tunnel and then feed the tube through the sleeve. I could not advance the tube and sleeve in together.

 

[Chuck]

Perhaps this link will help:

Chuck and Ryan's RCR Build

Radiator, Part II A vent line was added, connecting the cool / input side of the radiator to the connection on the top of the expansion tank. This permits any trapped air to vent from the radiator. Three eighths inch aluminum tubing was used to fabricate a long, straight line, equal in length...

www.gt40s.com