Cobra4B

My Dewitts w/ left side OC is on its way. I've heard that you can cut out parts of the shround to get more airflow through the cooling system. Anyone have a pic of where to cut? I'm sure I could "figure it out" but I dont' wantto destroy it.


Brian

0Randy@DRM

Send me a e-mail, and I can send you picture.

Randy
drm@tcinternet.net

Cobra4B

email sent.

0Randy@DRM

Email sent back!
Randy

Cobra4B

Randy for some reason I can't get the word doc to open... it's saying invalid file path.

Cobra4B

Got it

vms4evr

Randy,
Would this help with the stock radiator and your standalone oil cooler stacked in front of it?
Graham

0Randy@DRM

Thanks Brian, that's what I tried to do. I hate computers and computers hate me. If it wasn't for cars and girls I wouldn't even look at a computer.

Graham, Airflow is always a good idea. I would do it!!

Randy

John Shiels

winter project thanks Randy

jlucas

I have the mod above with my DRM/Ron Davis radiator. Maybe just to clarify a bit with my automotive engineer hat on, it is a benefit while moving. Sitting still, the stock configuration is better. I was not concerned because I already have more cooling capacity for stop & go driving with the DRM/RD rad.

Edit: Also it will take you forever with a dremel. Use a hole saw or uni-bit for the big chunks and then a air powered hack saw for the rest.

danswofford

For a track only car, should I just take the whole shroud out?

vms4evr

I don't see how you could. The shroud is also what the fans are installed into. Unless I missed something in that picture. The holes appear to be cut in areas when there is still enough material left to keep the structure rigid.

varkwso

Once again great info - picture saved so when I install the Dewitt rad sitting in my living room I will be good to go....

0Randy@DRM

For full time track cars you will not need the factory fans. But it is a good idea to put a slim 10 inch fan or so. Just incase you are running hot in the paddock area. Or if they red flag and make you stop.

Randy

Bill Dearborn

Didn't the early C5 (like 97) have shrouds with rubber flappers on them? If I remember correctly in 2001 when I installed the DRM radiator in my 97 I didn't have to cut the holes since most of them were already there and had rubber flaps over them. At speed the rubber flaps blew open and allowed air to pass through the shroud but when sitting still they closed and allowed the fan to pull air through the radiator. If so it might be useful to use an earlier shroud to get the benefits of both.

Bill

Cobra4B

^ Very interesting... but I bet the newer shround superceeds the older one and the only way to find it is a junk yard... neat idea though.

0Tom@Dewitt

It's a very nice photo, but I wouldn't do it. Puller fans suck the air through the core when at low rpm and/or idling in traffic. When you open these up, it's like punching holes in a vacuum line. You will notice that GM separated the two fans with a gusset in the middle. That's so you have a seal between the two fans and it allows you to run one fan without sucking through the one that's not running.
If you want to boost air flow, check out our SP015 package. That is a direct fit shroud with two Spal fans (3200 cfm) which double the factory unit.

96GS#007

Minor thread hijack, my appologies to Cobra4B

What do you have in regard to a '96 C4 and how does the cfm of your C4 package compare to the airflow of the factory fans?

Thanks

0Tom@Dewitt

My appologies too Cobra4B

SP461 Kit for an aftermarket dual core radiator &
SP462 kit for an original single row GM

Both double the stock air flow at 2760 cfm

http://www.dewitts.com/pages/categor...s.asp?catID=15

Cobra4B

Thanks Tom... it's your radiator... I'll listen to you.