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SN95 Cobras
Mishimoto radiator pics and some data.
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<blockquote data-quote="Twisted2" data-source="post: 16414304" data-attributes="member: 152625"><p>Just an update, for anyone who may ever consider a radiator upgrade. I am beyond impressed with this unit. I just spent over an hour driving the car in 90° weather, in all kinds of conditions. The sole purpose of the trip was to put the radiator through its paces, and see how it actually performs.</p><p></p><p>I spent a fair amount of time deliberately trying to heat the motor up, and overwhelm the cooling system. I couldn't though--and anytime I thought I was making progress (so to speak), the motor would start cooling back down before I'd get the chance to get more heat into it.</p><p></p><p>Here are some temperatures, in different conditions. Again, this is with the stock 188* thermostat, and fan settings (low/high on at 208/228). This is also via my Autometer gauge, which reads 4-5 degrees hotter than the PCM.</p><p></p><p>--With AC off, idling in traffic, the temp would slowly rise to 212 (or 208, according to the computer), and the fan would come on. The temperature would continue to rise 1 or 2 degrees for about 10 seconds, and then the needle would start to come down, developing momentum as it went. In less than 30 seconds (I think), it would drop to 207 (203), and the fan would turn off. (As a side note, I'd actually taken a 20-minute trip earlier, before traffic, and the fan never ran once. With the stock radiator, it would have been running most of the trip).</p><p>--AC on, on the freeway, it behaved the same as yesterday. Blasting up the ramp, uphill, at full throttle, to merge with 80 mph traffic, the temperature hit 211. Within a minute, it would start dropping, and seem to settle at 208 (the computer's 204). From there, it might dip a couple degrees higher or lower, depending on the load. This is compared to 231°, and climbing, with the stock radiator.</p><p>--Around town, the car ran much cooler with the AC on, than off (with the fan running the whole time). This was never the case with the old radiator. Even when I'd hammer on it from stop lights, AC blasting, in varying terrain (picture a hilly desert), I don't think I ever saw more than 210 degrees. At one point, down a very long hill (a few miles), it got down to 192.</p><p></p><p>This same hill (uphill) has always been my testing ground, anytime I'd make changes to the Cobra's cooling system--and even for high-speed tuning of motorcycles, back in the day. It's' a solid test area, where you don't stand out as a maniac while screaming up the road. The speed limit is 60-65, but people routinely do 70+. With the old radiator, in this weather, AC running, driving very gently, I might have seen 225 degrees by the time I'd reach the top. Today, I drove up that hill 3 times, at times, very aggressively--downshifting for no reason, just to lay it wide open repeatedly. The highest temperature I could muster by the top of the hill, was 214 degrees--and that was only for several seconds, before it started cooling off again.</p><p></p><p>Basically, with the Mishimoto, even driving the car hard, I couldn't get to within 10° of where it used to run, driving gently. Even getting it hot, at all, was difficult. Before, I would often choose my other car in 85+ degree weather. Now, I have no concerns driving the Cobra in SoCal. I'm actually looking forward to seeing how it performs at the end of August, when it's 105°.</p><p></p><p>One interesting thing about this radiator is that, in normal driving, at a glance, the temperatures might not look all that different. Day-to-day driving around town, in fair weather, if you're not watching them actually vary, the temps look about the same. Where this thing shines is in its overall and reserve capacity, under load and stress, and also in its ability to cool things back down quickly. This makes me think that if your stock radiator already handles heat well--which most do--then you might not notice the glaring difference that I did. This thing definitely seems to have solved my "96 Cobra cooling problem." </p><p></p><p>By the way, I also suspect that my 97+ AC condenser is actually helping now, whereas with the stock radiator, it made very little difference. Anyhow, thanks again everyone, for helping me talk through my cooling drama.</p><p></p><p>Oh, I also don't work for Mishimoto or anything. Haha. Just sharing my experience with what seems to be an awesome radiator.</p><p></p><p>Tom</p></blockquote><p></p>
[QUOTE="Twisted2, post: 16414304, member: 152625"] Just an update, for anyone who may ever consider a radiator upgrade. I am beyond impressed with this unit. I just spent over an hour driving the car in 90° weather, in all kinds of conditions. The sole purpose of the trip was to put the radiator through its paces, and see how it actually performs. I spent a fair amount of time deliberately trying to heat the motor up, and overwhelm the cooling system. I couldn't though--and anytime I thought I was making progress (so to speak), the motor would start cooling back down before I'd get the chance to get more heat into it. Here are some temperatures, in different conditions. Again, this is with the stock 188* thermostat, and fan settings (low/high on at 208/228). This is also via my Autometer gauge, which reads 4-5 degrees hotter than the PCM. --With AC off, idling in traffic, the temp would slowly rise to 212 (or 208, according to the computer), and the fan would come on. The temperature would continue to rise 1 or 2 degrees for about 10 seconds, and then the needle would start to come down, developing momentum as it went. In less than 30 seconds (I think), it would drop to 207 (203), and the fan would turn off. (As a side note, I'd actually taken a 20-minute trip earlier, before traffic, and the fan never ran once. With the stock radiator, it would have been running most of the trip). --AC on, on the freeway, it behaved the same as yesterday. Blasting up the ramp, uphill, at full throttle, to merge with 80 mph traffic, the temperature hit 211. Within a minute, it would start dropping, and seem to settle at 208 (the computer's 204). From there, it might dip a couple degrees higher or lower, depending on the load. This is compared to 231°, and climbing, with the stock radiator. --Around town, the car ran much cooler with the AC on, than off (with the fan running the whole time). This was never the case with the old radiator. Even when I'd hammer on it from stop lights, AC blasting, in varying terrain (picture a hilly desert), I don't think I ever saw more than 210 degrees. At one point, down a very long hill (a few miles), it got down to 192. This same hill (uphill) has always been my testing ground, anytime I'd make changes to the Cobra's cooling system--and even for high-speed tuning of motorcycles, back in the day. It's' a solid test area, where you don't stand out as a maniac while screaming up the road. The speed limit is 60-65, but people routinely do 70+. With the old radiator, in this weather, AC running, driving very gently, I might have seen 225 degrees by the time I'd reach the top. Today, I drove up that hill 3 times, at times, very aggressively--downshifting for no reason, just to lay it wide open repeatedly. The highest temperature I could muster by the top of the hill, was 214 degrees--and that was only for several seconds, before it started cooling off again. Basically, with the Mishimoto, even driving the car hard, I couldn't get to within 10° of where it used to run, driving gently. Even getting it hot, at all, was difficult. Before, I would often choose my other car in 85+ degree weather. Now, I have no concerns driving the Cobra in SoCal. I'm actually looking forward to seeing how it performs at the end of August, when it's 105°. One interesting thing about this radiator is that, in normal driving, at a glance, the temperatures might not look all that different. Day-to-day driving around town, in fair weather, if you're not watching them actually vary, the temps look about the same. Where this thing shines is in its overall and reserve capacity, under load and stress, and also in its ability to cool things back down quickly. This makes me think that if your stock radiator already handles heat well--which most do--then you might not notice the glaring difference that I did. This thing definitely seems to have solved my "96 Cobra cooling problem." By the way, I also suspect that my 97+ AC condenser is actually helping now, whereas with the stock radiator, it made very little difference. Anyhow, thanks again everyone, for helping me talk through my cooling drama. Oh, I also don't work for Mishimoto or anything. Haha. Just sharing my experience with what seems to be an awesome radiator. Tom [/QUOTE]
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