| I wrote: I have a '93 nissan 300zx twin turbo. V6 3.0 liter. I am shooting for 600rwhp. I dont know where the proper balance between efficiency and flow is. But is it best to use the tube / fin or bar / plate design? This would be a street driven car.
Before looking at your site I was about to buy a frontmounted Intercooler with 2 ins and 2 outs which was 3" deep 12" high 24" wide. Or 3"x6"x24" per side. Would this be a good size?
Any info would be helpful.
Thanks,
Tom reply:
Hi Tom,
Surprisingly, all cores work out to be just about the same when sized properly for the job. There are no bad pieces out there, as far as basic core material goes. The size is determined by the pressure loss at the desired flow rate. The standard of the industry says a 2 psi pressure loss is okay. We prefer 1 to 1.5. The flow loss is determined by the internal flow area. In general, 6.0 square inches of air channel flow area is needed to support 100 bhp, or 150 cfm. In your situation, 600 bhp would equate to about 900 cfm. Either look for a core with a 900 rating, or calc the estimated flow area. The estimate is typically the area of the charge face under the cap times about 40%. With 600 bhp times 6 inches square per hundred, that equals 36 square inches of flow area. Divide by .4 to get a face area of 90 square inches of area under the cap. Example cores would be 4.5 thick by 20 long, or 3.5 x 26. Then make the tubes a convenient length that will fit the space required. Tubes of 8 inches will do about all you can do with heat removal. With caps added, that will generally make an IC height of about 13/14 inches. Regards, Corky Bell. he kinda lost me at the end :)
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