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Old Sep 11, 2011 | 04:30 PM
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Default Cooling System

I added about 100HP to my car, so I thought increased cooling capacity would be needed. I added a Z06 oil cooler and a ZR1 radiator. The ZR1 radiator uses a Vistarpo core and the Euclid adds the tank and mount points.

Before I upped the HP, on a mid 80's day, the cars would run 220+ in traffic with the a/c on and a 160 thermostat. Now it runs 190 water and 195 oil temp. The beautiful thing about this is that everything bolts in and looks like it was made that way!
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Old Sep 11, 2011 | 10:30 PM
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Im interested in doing the same. Is the ZR1 radiator a direct fit? Or does ot require some modifications or adapters. I also wondered about the new Z07 radiator for this.
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Old Sep 11, 2011 | 10:56 PM
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Cool. First I heard of a ZR1 swap. Wonder how this compares to a Dewiits in price and performance?
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Old Sep 11, 2011 | 11:34 PM
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Old Sep 12, 2011 | 03:20 PM
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The ZR1 fit perfect and the Z07 is the same radiator as the ZR1. And you get OE quality.

Last edited by timd38; Sep 12, 2011 at 03:35 PM.
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Old Sep 12, 2011 | 03:51 PM
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Originally Posted by timd38
The ZR1 fit perfect and the Z07 is the same radiator as the ZR1. And you get OE quality.
I thought it should be a direct fit. I was told by a aftermarket manufacturer that the ZR1 radiator had different mounting and hoses.

Do you know why the ZR1 and Z07 radiator carry diferent part numbers?

And could you take some pictures of how the radiator fits and looks?

Thanks..
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Old Sep 12, 2011 | 04:18 PM
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Update!

I gave sum bad info. I just got an update from Euclid.

The ZR1 has a quick disconnect fitting for inlet of the radiator allowing for quick removal where the Z07 has a standard hose and clamp assembly. The ZR1 also has an EOC return line where minr does not. There are a couple other real small differences, but those are the main ones.
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Old Sep 12, 2011 | 08:05 PM
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Originally Posted by timd38
Update!

I gave sum bad info. I just got an update from Euclid.

The ZR1 has a quick disconnect fitting for inlet of the radiator allowing for quick removal where the Z07 has a standard hose and clamp assembly. The ZR1 also has an EOC return line where minr does not. There are a couple other real small differences, but those are the main ones.
Z07 also has straight aeration pipe vs. angled on ZR1.

Dewitt's unit looks like a thicker 2row core with 1 inch tube. Vistapro's ZR1 core is a 36mm tight pitch core with dense fin and dimpled B tubes. This core outperforms the 2row core in a heartbeat and weighs less! Even GM engineering decided to ditch the original plastic aluminum version and upgrade to this full aluminum tight pitch 36mm!
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Old Sep 12, 2011 | 08:26 PM
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Originally Posted by w3!h311
Z07 also has straight aeration pipe vs. angled on ZR1.

Dewitt's unit looks like a thicker 2row core with 1 inch tube. Vistapro's ZR1 core is a 36mm tight pitch core with dense fin and dimpled B tubes. This core outperforms the 2row core in a heartbeat and weighs less! Even GM engineering decided to ditch the original plastic aluminum version and upgrade to this full aluminum tight pitch 36mm!
Thanks for the info!

Thew real key fro me is the fits really well and has passed all of GM's durability testing and it keeps the motor running at the correct operating temperature.

Great product.
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Old Sep 12, 2011 | 08:58 PM
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Originally Posted by w3!h311
Z07 also has straight aeration pipe vs. angled on ZR1.

Dewitt's unit looks like a thicker 2row core with 1 inch tube. Vistapro's ZR1 core is a 36mm tight pitch core with dense fin and dimpled B tubes. This core outperforms the 2row core in a heartbeat and weighs less! Even GM engineering decided to ditch the original plastic aluminum version and upgrade to this full aluminum tight pitch 36mm!
looks like we have a radiator ringer here.
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Old Sep 12, 2011 | 09:37 PM
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Originally Posted by NYC6
looks like we have a radiator ringer here.
At least someone is willing to honestly acknowledge the pros and/or cons of the upgrade..
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Old Sep 13, 2011 | 06:00 AM
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If you add more HP, you generate more heat and need more cooling capacity. With weight being so critical to fuel mileage, and performance, you need the most efficient package.
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Old Sep 15, 2011 | 10:48 AM
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So are there any pros/cons in chosing the ZR1 radiator over the Z07 radiator?

I also want to upgrade to the ZR1 oil cooler, and figured the ZR1 radiator might be a better choice becasue of that.
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Old Sep 15, 2011 | 11:05 AM
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Originally Posted by All_Motor_C5LS6
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Lots of good info, I may do the same mod later.
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Old Sep 15, 2011 | 11:18 AM
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09 Z06 should have regular hose/clamp for the inlet, no engine oil cooler and straight vent on the outlet side correct? If so then upgrade to ZR1 will need to change inlet hose connector to quickconnect type, cap the heater return line on inlet side and tweak your vent connection on outlet side. If you don't mind those small changes, ZR1 rad is a way to go.

However Z07 rad should be a drop-in, just need to cap the heater line everything else should be identical to Z06 rad.
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Old Sep 15, 2011 | 12:50 PM
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Originally Posted by timd38
The ZR1 fit perfect and the Z07 is the same radiator as the ZR1. And you get OE quality.
LOL ...quality will not match that of a Ron davis or Dewitts, but if your getting results similar for less money then thats good ingenuity....
I run a super stroker 457 and temps are 180 no matter how hard I drive it or the weather with the Ron Davis so your close with your temps... Not sure how much money you have into it ?
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Old Sep 15, 2011 | 12:57 PM
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do you happen to have the gm part # for the z07 radiator???
does this have a trans fluid warmer (or cooler as some call it)?


wow just checked parts taxi. regular z06 unit is $270.27 the z07 is $1,182.44

Last edited by el es tu; Sep 15, 2011 at 01:03 PM.
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Old Sep 15, 2011 | 02:35 PM
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Originally Posted by el es tu
wow just checked parts taxi. regular z06 unit is $270.27 the z07 is $1,182.44


Z06 is an upgrade in capacity and adding a 100 HP to C6 puts the car only a little above the stock Z06. Add in the Z06 oil cooler and it probably takes tracking the car pretty hard on a hot day to bump up against the systems' ability to cool.
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Old Sep 15, 2011 | 06:30 PM
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Originally Posted by Ragtop 99


Z06 is an upgrade in capacity and adding a 100 HP to C6 puts the car only a little above the stock Z06. Add in the Z06 oil cooler and it probably takes tracking the car pretty hard on a hot day to bump up against the systems' ability to cool.


Also, check out the Auto-X section. Tons of proven and practical info.
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Old Sep 21, 2011 | 08:53 PM
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Originally Posted by timd38
The ZR1 radiator uses a Vistarpo core and the Euclid adds the tank and mount points
That is correct, but how did you find this out. Its not really something the advertise.
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