Race Car Tech Discuss anything related to road racing and auto X.

which is better for cooling??

Old 11-17-03, 03:44 PM
  #1  
Rotary Enthusiast
5 Year Member
Thread Starter
 
specRX7_22's Avatar
 
Join Date: Nov 2002
Location: Eastern PA
Posts: 1,014
Likes: 0
Received 0 Likes on 0 Posts
which is better for cooling??

Which cooling setup is better and more effective?

The early setup with the smaller radiator and the oil cooler underneath, OR the later setup with the larger radiator and the oil cooler sorta under the oil filter??

any advantages or disadvantages of either?


ALSO.... is an aftermarket aluminum radiator better than a stock one in GOOD condition? If so, what are some known brands that you guys trust or use?
specRX7_22 is offline  
Old 11-17-03, 05:28 PM
  #2  
SCCA Rookie
10 Year Member
 
Barwick's Avatar
 
Join Date: May 2001
Location: Sterling Heights, MI
Posts: 1,936
Likes: 0
Received 0 Likes on 0 Posts
a lot of cooling for a rotary is done by the oil (or so I heard the Mazda Engineers said)

If that's true, I'm gonna go ahead and say definitely the big oil cooler.

Btw race car drivers prefer the big oil cooler setup as well.
Barwick is offline  
Old 11-17-03, 07:25 PM
  #3  
Find Racing
10 Year Member
 
Redwood's Avatar
 
Join Date: May 2001
Location: Seattle, WA
Posts: 1,219
Likes: 0
Received 0 Likes on 0 Posts
UNDOUBTEDLY the first (oil cooler under radiator).

Oil cooling is huge on rotaries. Make sure the radiator is in good working order and getting plenty of air and you'll be fine for everything except for some damn hard racing (even then, probably be fine).

The later setup with the oil cooler under the oil cooler was a questionable move by Mazda (can anyone justify this for me? always kinda wondered). Even better though is to use the larger radiator and retrofit a 2nd gen oil cooler.

I'd recommend temp gauges too, just to reinforce the efforts.

Good luck.
Redwood is offline  
Old 11-18-03, 06:03 AM
  #4  
Senior Member
15 Year Member
 
SPiN Racing's Avatar
 
Join Date: Mar 2001
Location: St. Pete, FL
Posts: 481
Likes: 0
Received 0 Likes on 0 Posts
Oil Cooler under Rad.
The "Gurus" I know.. as well as ALL the racers I know.. the FIRST thing they do to a mazda they MAY Autocross or even drive hard.. is JUNK the Oil filter Oil cooler.
The Front Mount oil cooler is great.
SPiN Racing is offline  
Old 11-18-03, 11:43 AM
  #5  
Senior Member
 
TrentO's Avatar
 
Join Date: Jul 2003
Location: Edmonton, AB, Canada
Posts: 408
Likes: 0
Received 0 Likes on 0 Posts
Large oil cooler underneath the short rad. I run a 3-core short rad and the large oil cooler underneath. The car only got warm once when I put some expanded metal mesh in front of the rad to keep debris out.
With the addition of a chin spoiler to force extra air through the setup is bulletproof. (As long as you stay on track an out of the weeds)

-Trent
TrentO is offline  
Old 11-18-03, 12:14 PM
  #6  
Polishing Fiend
iTrader: (139)
 
CrispyRX7's Avatar
 
Join Date: Apr 2001
Location: MD
Posts: 3,296
Received 7 Likes on 7 Posts
I heard from one of Downings mechanics that oil cooling in a rotary accounts for about 40% of your total heat load. Use the bigger oil cooler - better cooling and larger oil inventory.
On my FD larger more efficient oil coolers dropped both oil temperatures **AND** water temps considerabl
my2cents
Crispy
CrispyRX7 is offline  
Old 11-20-03, 07:04 PM
  #7  
50mpg - oooooh yeah!
5 Year Member
 
chairchild's Avatar
 
Join Date: Mar 2003
Location: UK
Posts: 527
Likes: 0
Received 0 Likes on 0 Posts
hmmm......

I've got a 12a (with oil-filter mounted oil cooler) would it be ok to plumb in an aftermarket oil cooler and keep the standard cooler plumbed in? If not, which holes do I have to plug to stop water from pouring out onto the floor?
chairchild is offline  
Old 11-27-03, 09:12 AM
  #8  
Racing is life!
10 Year Member
iTrader: (2)
 
cpa7man's Avatar
 
Join Date: Jan 2003
Location: Grapevine, TX
Posts: 2,174
Likes: 0
Received 0 Likes on 0 Posts
It seems most or all of the spec7 cars have the oil filter mount cooler. I was thinking this was a requirement in spec7????

I agree with the above viewpoints, also the large stock radiator does a great job.

What oil and water temps are you seeing on the track specrx722??
cpa7man is offline  
Old 11-27-03, 04:30 PM
  #9  
Rotary Enthusiast
5 Year Member
Thread Starter
 
specRX7_22's Avatar
 
Join Date: Nov 2002
Location: Eastern PA
Posts: 1,014
Likes: 0
Received 0 Likes on 0 Posts
No its not a requirement, I think it's just that alot of people have later cars.

Oil temps - don't remember off hand.
Water temps >> 190-210 (depending on many things.)

I know for a fact that oil helps cooling ALOT because at the last race when my dad had a little 'incident' at the left front corner which caused everything to shift to the right, the oil line got a little bit kinked (only to decrease flow alittle bit, and he saw temps 220-225.

(that little incident also totaled the car... frame and frame tips have been bent 10 too many times lol.)
specRX7_22 is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
He's On Toroids
NE RX-7 Forum
48
10-19-15 08:58 PM
ls1swap
3rd Generation Specific (1993-2002)
12
10-01-15 07:58 PM
carid
Vendor Classifieds
0
09-10-15 09:24 AM


Thread Tools
Search this Thread
Quick Reply: which is better for cooling??


Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: