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  #1 (permalink)  
Old 11-25-2009, 08:11 PM
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Default Small Block ERA Webers Radiator Cap Rating?

Bob, what Radiator cap pressure rating do you use with your Small Block Weber operated cars? I have a 16 psi. with a 195 thermostat.
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  #2 (permalink)  
Old 11-26-2009, 04:38 AM
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We normally use a Motorcraft RS-62, which is a 13psi cap.
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Old 11-26-2009, 06:27 AM
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Thanks! Where are you placing the Thermostat? I have attached mine to the end of the Y-manifold but the motor likes to expel coolant when under hard acceleration on the street. Yes, i wait until everything is good & warmed up. Happy Thanksgiving everyone!
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Old 11-26-2009, 07:11 AM
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The closer to the engine, the better. What remote thermostat setup are you using? Is there a bypass built in?
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Old 11-26-2009, 08:15 AM
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I just built a custom manifold & attached the 195 thermostat to the end to fix the problem but it doesn't seem to have done the trick. I have no bypass as of now. I stole the idea of wiring the thermostat to the manifold from Rick Parker. http://www.clubcobra.com/photopost/s...7/ppuser/24567
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Last edited by *13*; 11-26-2009 at 08:22 AM..
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Old 11-27-2009, 04:58 AM
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Now that's interesting! You will definitely need to find some way to bypass a small amount of water directly around the thermostat. Otherwise the hot water will never get to bathe the wax bulb to effect the thermostat opening.

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Old 11-27-2009, 06:20 AM
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You need to put in a bypass hose. Rick and I had the same problem with the dual outlet Weber manifold. The temp would not go over 140 on my ERA. I tried different thermostats like Moroso and Mr Gasket, nothing worked. I tried a regular thermostat with a 3/16 hole drilled through the face and the temp would not go over 170. I put in a bypass hose with a Mierze inline thermostst housing and a Napa Super Stat 180 thermostat and it works fine, stays at 180. The ERA radiator is huge.
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Old 11-27-2009, 06:25 AM
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So the bypass is necessary! Kinda what we were thinking.. Thanks for your input!
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