V8 Radiator Sources |
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V8 Radiator Sources |
kyracedog |
Mar 31 2010, 08:44 PM
Post
#1
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Newbie Group: Members Posts: 19 Joined: 19-November 05 From: kentucky Member No.: 5,151 |
Ok V8 guys, what type of radiators did you use? I know Renegade sells a kit that works, but $1100 is a budget buster. Already have the dual fans to use, so don't need them.
Looking for ideas/suggestions/sources. Thanks. |
stewteral |
Oct 9 2010, 11:20 AM
Post
#2
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Old Member Group: Members Posts: 384 Joined: 4-December 07 From: Camarillo, CA Member No.: 8,424 Region Association: Southern California |
Ok V8 guys, what type of radiators did you use? I know Renegade sells a kit that works, but $1100 is a budget buster. Already have the dual fans to use, so don't need them. Looking for ideas/suggestions/sources. Thanks. Hey Kyracedog, I've been running my 914 V8 on-track for some 7 years. It has a 500 HP 383 and I've been running a SUMMIT RACING $160 aluminum Camaro radiator (SUM-380331). It is 31" x 19" and with a little hammer "massaging" fits nicely between the head light boxes. It is a single pass radiator and according to my engineer bud, gives MAX efficiency by presenting the Highest Delta-T to the airflow (the hotter the water presented to cooling air, the more efficient the heat exchange). With a dual pass, the 1st pass is efficient, but the 2nd pass is cooler and less efficient. I'm afraid I know Scottie all too well at Renegade and there is NO engineering talent there. They don't know how to do "research." They don't make any of their parts for the conversion kits and when my engineer bud visited the Las Vegas shop, found nothing but an open bay and hand tools. Their work is "back yard mechanic", at best. Scottie bought the company from the original founder and is just "turning the crank" to make $$.....IMO. Scottie's "profession" before Renegade was as a Disc Jockey. As a rule of thumb, if your conversion is modest power, 300 - 400 HP, you can probably be OK with venting the radiator air through the fender wells as most do. However, if you are going 400HP+or live in a hot climate (I run at Willow Springs in the HOT upper desert of SOCAL), I found out the "hard-way" (or would you call that "Research?" (IMG:style_emoticons/default/smile.gif) ) that venting out through the hood is THE ANSWER. I posted my finding on the paddock forum a few months back. Regardless, be sure to CONTROL the airflow with ducting to assure ALL goes through the radiator. I my experiences can help you, Terry Attached image(s) |
BRAVE_HELIOS |
Oct 9 2010, 12:09 PM
Post
#3
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"Knowledge speaks, wisdom listens" Group: Members Posts: 295 Joined: 25-September 06 From: The Land Of ID! Member No.: 6,920 Region Association: Pacific Northwest |
Ok V8 guys, what type of radiators did you use? I know Renegade sells a kit that works, but $1100 is a budget buster. Already have the dual fans to use, so don't need them. Looking for ideas/suggestions/sources. Thanks. Hey Kyracedog, I've been running my 914 V8 on-track for some 7 years. It has a 500 HP 383 and I've been running a SUMMIT RACING $160 aluminum Camaro radiator (SUM-380331). It is 31" x 19" and with a little hammer "massaging" fits nicely between the head light boxes. It is a single pass radiator and according to my engineer bud, gives MAX efficiency by presenting the Highest Delta-T to the airflow (the hotter the water presented to cooling air, the more efficient the heat exchange). With a dual pass, the 1st pass is efficient, but the 2nd pass is cooler and less efficient. I'm afraid I know Scottie all too well at Renegade and there is NO engineering talent there. They don't know how to do "research." They don't make any of their parts for the conversion kits and when my engineer bud visited the Las Vegas shop, found nothing but an open bay and hand tools. Their work is "back yard mechanic", at best. Scottie bought the company from the original founder and is just "turning the crank" to make $$.....IMO. Scottie's "profession" before Renegade was as a Disc Jockey. As a rule of thumb, if your conversion is modest power, 300 - 400 HP, you can probably be OK with venting the radiator air through the fender wells as most do. However, if you are going 400HP+or live in a hot climate (I run at Willow Springs in the HOT upper desert of SOCAL), I found out the "hard-way" (or would you call that "Research?" (IMG:style_emoticons/default/smile.gif) ) that venting out through the hood is THE ANSWER. I posted my finding on the paddock forum a few months back. Regardless, be sure to CONTROL the airflow with ducting to assure ALL goes through the radiator. I my experiences can help you, Terry I think I understand the part about the Delta T of the air moving past the fins and cooling tubes (or is that the Delta T of the coolant). But how does it (the cooling effect) become less efficient when the coolant essentially passes though the radiator twice... say if the single pass and the double pass radiators are both 2 core? Does it have to do with the rate of change (Delta T). Also, how does the frontal area of the raiator come into play? I read that to get that number, you multiply the CID of the engine by 1.5.... so a 350 would need about 525 sq. inches of frontal radiator area. It does sound like that if a single pass cross-flow radiator works for your 500hp setup, it should work for my 250hp setup. What type of fans are you using? |
Bruce Hinds |
Oct 9 2010, 07:45 PM
Post
#4
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V-8 madness Group: Members Posts: 733 Joined: 27-December 06 From: Port Orchard, WA Member No.: 7,391 Region Association: Pacific Northwest |
Ok V8 guys, what type of radiators did you use? I know Renegade sells a kit that works, but $1100 is a budget buster. Already have the dual fans to use, so don't need them. Looking for ideas/suggestions/sources. Thanks. Hey Kyracedog, I've been running my 914 V8 on-track for some 7 years. It has a 500 HP 383 and I've been running a SUMMIT RACING $160 aluminum Camaro radiator (SUM-380331). It is 31" x 19" and with a little hammer "massaging" fits nicely between the head light boxes. It is a single pass radiator and according to my engineer bud, gives MAX efficiency by presenting the Highest Delta-T to the airflow (the hotter the water presented to cooling air, the more efficient the heat exchange). With a dual pass, the 1st pass is efficient, but the 2nd pass is cooler and less efficient. I'm afraid I know Scottie all too well at Renegade and there is NO engineering talent there. They don't know how to do "research." They don't make any of their parts for the conversion kits and when my engineer bud visited the Las Vegas shop, found nothing but an open bay and hand tools. Their work is "back yard mechanic", at best. Scottie bought the company from the original founder and is just "turning the crank" to make $$.....IMO. Scottie's "profession" before Renegade was as a Disc Jockey. As a rule of thumb, if your conversion is modest power, 300 - 400 HP, you can probably be OK with venting the radiator air through the fender wells as most do. However, if you are going 400HP+or live in a hot climate (I run at Willow Springs in the HOT upper desert of SOCAL), I found out the "hard-way" (or would you call that "Research?" (IMG:style_emoticons/default/smile.gif) ) that venting out through the hood is THE ANSWER. I posted my finding on the paddock forum a few months back. Regardless, be sure to CONTROL the airflow with ducting to assure ALL goes through the radiator. I my experiences can help you, Terry I think I understand the part about the Delta T of the air moving past the fins and cooling tubes (or is that the Delta T of the coolant). But how does it (the cooling effect) become less efficient when the coolant essentially passes though the radiator twice... say if the single pass and the double pass radiators are both 2 core? Does it have to do with the rate of change (Delta T). Also, how does the frontal area of the raiator come into play? I read that to get that number, you multiply the CID of the engine by 1.5.... so a 350 would need about 525 sq. inches of frontal radiator area. It does sound like that if a single pass cross-flow radiator works for your 500hp setup, it should work for my 250hp setup. What type of fans are you using? Double pass only means that it goes from side to side in 1/2 the radiator and then goes side to side through the other half. Thats why the have the inlet and outlet on the same sides. The tanks on each side have a wall in the middle ofo them. Delta-T refers to the amount of temperature change. |
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