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Ron Davis radiator questions

Posted: 01 Mar 2016 03:32
by jonk
Hi Guys,

I'm in the market for a new radiator for my SR20det 510. Getting more and more focused on track days, i've realised that my current Jap N13 radiator isn't up to the task and my car overheats after only a lap or two.

I've seen some people on this forum using Ron Davis 1A-22163 (22x16x3") which seems very well priced at $300us, and i'm hoping someone can answer my questions.

That part number is no longer listed, and they now list a 1S-22163. Is anyone aware of the difference between "1S" and "1A"?

Also, is there any reason why nobody used the 24163 (24" wide) or wider? According to my measurements, it should fit fairly easily, even with intercooler piping (I'm using a generic china 450x300x76 intercooler. My current radiator is about 27 inches wide). The CX racing radiators people use is about 28" if I'm not mistaken, so why go only 22 inch with the Ron Davis?

Is there something I am missing?
Surely bigger is better..?

Thanks for your help.

Re: Ron Davis radiator questions

Posted: 02 Mar 2016 15:04
by PoorMtnKid
I have the Ron Davis radiator that McKinney Motor sports builds....... Not too sure on the excat part number but I can measure the length when I get home.

Re: Ron Davis radiator questions

Posted: 05 Mar 2016 21:40
by jonk
PoorMtnKid wrote:I have the Ron Davis radiator that McKinney Motor sports builds....... Not too sure on the excat part number but I can measure the length when I get home.


Yes please. If its not too much trouble...

Re: Ron Davis radiator questions

Posted: 06 Mar 2016 13:54
by PoorMtnKid
The fin area covers 18Wx14.5H. Add two inches on each side for the end tanks. Top of the radiator measures 3 inches , hope that helps

Re: Ron Davis radiator questions

Posted: 12 Mar 2016 22:08
by jonk
PoorMtnKid wrote:The fin area covers 18Wx14.5H. Add two inches on each side for the end tanks. Top of the radiator measures 3 inches , hope that helps


Thanks a a lot for that.
It does sit above the chassis rails at the bottom, yeah? (as in not between)?

Cheers,

Re: Ron Davis radiator questions

Posted: 13 Mar 2016 07:46
by PoorMtnKid
Here is a link to my build, specifically a page where I was working on the radiator. You can see in the first photo the brackets on the bottom frame rail.

viewtopic.php?f=3&t=15796&start=660

Page 47 of the build has a good picture of the upper mount and shows how high above the top rail it sits.

Re: Ron Davis radiator questions

Posted: 14 Mar 2016 05:03
by jonk
PoorMtnKid wrote:Here is a link to my build, specifically a page where I was working on the radiator. You can see in the first photo the brackets on the bottom frame rail.

http://the510realm.com/viewtopic.php?f= ... &start=660

Page 47 of the build has a good picture of the upper mount and shows how high above the top rail it sits.



Looking at your pics, i don't see any reason why the 24" wide version won't fit.

Thanks a lot for that!

Re: Ron Davis radiator questions

Posted: 14 Mar 2016 07:27
by PoorMtnKid
You will just need to cut out more of the support to clear the opening for air to hit. Good luck

Re: Ron Davis radiator questions

Posted: 15 Mar 2016 07:10
by bertvorgon
viewtopic.php?f=2&t=9032&hilit=radiator+shroud+project

For what it is worth, here is a link to my fan/radiator project. I did open up the rad support to maximize the surface area of the rad exposed to air flow.

Re: Ron Davis radiator questions

Posted: 28 Mar 2016 05:33
by jonk
bertvorgon wrote:http://www.the510realm.com/viewtopic.php?f=2&t=9032&hilit=radiator+shroud+project

For what it is worth, here is a link to my fan/radiator project. I did open up the rad support to maximize the surface area of the rad exposed to air flow.


That's a good idea. Thanks for sharing.

Re: Ron Davis radiator questions

Posted: 02 Jun 2017 16:08
by eastbaysolo_73
Hey guys I have another question in regards to the Ron Davis #1S- 22163 rad listed above. What did you guys do for the radiator hose connections? I know the Sr's inlet and outlet on the engine is about 33-35mm 1 11/32 and the Ron Davis in and outs connections are 1-1/2 and 1-3/4. Thanks in advance to those who chime.
Oh FYI the #1A-22163-1 is with fan and shroud. No fan and shroud #1S- 22163

Thank again