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70 LS5 Radiator

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Old Jan 13, 2013 | 10:18 AM
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Default 70 LS5 Radiator

Anybody use the ZIP #RA-228 aluminum radiator ($400) for a 1970 454 Manual Transmission? I would like feedback on this particular radiator. It's either this one, or have my original brass/copper re-cored. I'm not concerned about how beautiful it is... I'm concerned about fitment and durability.

http://www.zip-corvette.com/ProductDetails/ProductDetails.aspx?pid={4facd627-208f-42dd-96e9-d212fe5830b5}&gid={600b9d9b-a0d5-4052-83b9-f3ff4da94acb}&GroupName=Replacement+Radi ators&pname=69-72+427%2f454+Aluminum+Radiator+(Manual+T ransmission)&Referer=&Alias=&ptct=SGR-SR&CTitle=&

Have no idea why the link showed up like that.
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Old Jan 13, 2013 | 10:46 AM
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You might consider a DeWitts. Then you have no doubts about the fitment (and performance).
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Old Jan 13, 2013 | 11:07 AM
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I agree, DeWitts... Take the guess work out.

They have a Sale going on, right now.

Last edited by CFD E59; Jan 13, 2013 at 11:12 AM.
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Old Jan 13, 2013 | 12:58 PM
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I'm sure they have a great product. I'm going with $400 or less.
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Old Jan 14, 2013 | 08:24 AM
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C3 69-72 Corvette Big Block 4-Speed Radiator

The RA-228 is a DeWitt Radiator.
We have this in stock and ready to ship.
If you have any questions give us a call.
1-800-962-9632
Tom@Zip ext 240
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Old Jan 14, 2013 | 11:15 AM
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That's good to know. Thank you.

Anybody out there install this radiator? I would like actual "user" feedback if possible. I.E.- Is it truly a drop in? Hose connections in the right place and at the correct angles? Tank flanges the correct width and the correct horizontal spacing to fit the factory rubber mounts correctly? Factory weatherstrip can be added/bonded along lip where required (along top edge)? Drain **** in the same/OEM place? No (extra) Automatic Transmission bungs? Lower radiator hose connection is not a "Frankenstein" configuration like I have seen on some?
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Old Jan 14, 2013 | 09:04 PM
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Installed the Dewitt in my 70' 454 automatic about ten months ago (the Keisler RS 500 is sitting on the shop floor and going in as part of a zero time body off rebuild). It is a true drop in. Every thing lines up to stock original. It's a dead bang on replacement. I ordered the insulation kit from Zips and everything went in just fine. The workmanship of the Dewitt radiator is excellent and your cooling will improve. You will not be disappointed. Good customer service too.
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Old Jan 14, 2013 | 09:06 PM
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P.S., The automatic radiator has it's own part number so if you order a manual specific radiator it will not have the trans cooling bungs in it.
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Old Jan 15, 2013 | 10:17 AM
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Originally Posted by tom00799
Installed the Dewitt in my 70' 454 automatic about ten months ago (the Keisler RS 500 is sitting on the shop floor and going in as part of a zero time body off rebuild). It is a true drop in. Every thing lines up to stock original. It's a dead bang on replacement. I ordered the insulation kit from Zips and everything went in just fine. The workmanship of the Dewitt radiator is excellent and your cooling will improve. You will not be disappointed. Good customer service too.
Thanks. That is what I needed to hear.
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Old Jan 15, 2013 | 06:24 PM
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Originally Posted by Tom454
That's good to know. Thank you.

Anybody out there install this radiator? I would like actual "user" feedback if possible. I.E.- Is it truly a drop in? Hose connections in the right place and at the correct angles? Tank flanges the correct width and the correct horizontal spacing to fit the factory rubber mounts correctly? Factory weatherstrip can be added/bonded along lip where required (along top edge)? Drain **** in the same/OEM place? No (extra) Automatic Transmission bungs? Lower radiator hose connection is not a "Frankenstein" configuration like I have seen on some?
I just installed one in my 71 454 W/AC. Everything fits and lines up fine. One minor issue is the Expansion Tank (AC) spout should be bent over more. It makes the Expansion Tank hose kink a little by the time you route over to the firewall. The stock spout is about 70-80 degrees and the Dewitts is about 45 degrees. Not a huge issue, but you asked.

Pic:


Last edited by C6DuffMan; Jan 15, 2013 at 06:26 PM.
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Old Jan 15, 2013 | 06:54 PM
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Is part #RA-233 also a Dewitts? I'm thinking of getting one for my '81. Thanks
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Old Jan 15, 2013 | 08:28 PM
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Originally Posted by C6DuffMan
I just installed one in my 71 454 W/AC. Everything fits and lines up fine. One minor issue is the Expansion Tank (AC) spout should be bent over more. It makes the Expansion Tank hose kink a little by the time you route over to the firewall. The stock spout is about 70-80 degrees and the Dewitts is about 45 degrees. Not a huge issue, but you asked.

Pic:

Thank you for responding. My original is also 70-80.
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Old Aug 25, 2014 | 01:12 PM
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Originally Posted by Tom@Zip
C3 69-72 Corvette Big Block 4-Speed Radiator

The RA-228 is a DeWitt Radiator.
We have this in stock and ready to ship.
If you have any questions give us a call.
1-800-962-9632
Tom@Zip ext 240
Is this true, RA-228 Aluminum Radiator sold by ZIP is made by DeWitt?
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Old Aug 25, 2014 | 02:11 PM
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71Green,
The RA-228 is the Dewitts R69M.
Hope this helps, if you have any questions feel free.
Kind Regards,
Tom @ Zip
1-800-962-9632 ext 240.
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Old Aug 25, 2014 | 02:16 PM
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Originally Posted by Tom@Zip
71Green,
The RA-228 is the Dewitts R69M.
Hope this helps, if you have any questions feel free.
Kind Regards,
Tom @ Zip
1-800-962-9632 ext 240.
Thanks, then it should be a "direct fit", correct?

I'm just about ready to finalize my ZIP order. The list is growing.

Last edited by 71 Green 454; Aug 25, 2014 at 02:24 PM.
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Old Aug 25, 2014 | 02:26 PM
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Yes, it should drop right in.
Glad to hear it!
If you have any questions, feel free.
Tom @ Zip 1-800-962-9632 ext 240
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Old Aug 25, 2014 | 02:30 PM
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Originally Posted by Tom@Zip
Yes, it should drop right in.
Glad to hear it!
If you have any questions, feel free.
Tom @ Zip 1-800-962-9632 ext 240
Thanks Tom, good to hear, I'm placing my order and checking out.

Great sale you're having at ZIP and perfect timing for me.
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To 70 LS5 Radiator

Old Aug 25, 2014 | 03:24 PM
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I have the DeWitts radiator in mine as well, (manual trans), for in excess of 5 years. Everything lined up using stock radiator hoses, drains etc. You won't be disappointed.

Jim
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Old Aug 25, 2014 | 04:04 PM
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Originally Posted by 70BBvert
I have the DeWitts radiator in mine as well, (manual trans), for in excess of 5 years. Everything lined up using stock radiator hoses, drains etc. You won't be disappointed.

Jim
Thanks Jim, did you paint yours or leave it as is?

Dave
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Old Aug 25, 2014 | 05:31 PM
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Originally Posted by 71 Green 454
Thanks Jim, did you paint yours or leave it as is?

Dave
I left mine as is



Jim
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