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-   -   Small Block ERA Webers Radiator Cap Rating? (http://www.clubcobra.com/forums/era-speak-bob-putnam/101093-small-block-era-webers-radiator-cap-rating.html)

*13* 11-25-2009 09:11 PM

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.

strictlypersonl 11-26-2009 05:38 AM

We normally use a Motorcraft RS-62, which is a 13psi cap.

*13* 11-26-2009 07:27 AM

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!

strictlypersonl 11-26-2009 08:11 AM

The closer to the engine, the better. What remote thermostat setup are you using? Is there a bypass built in?

*13* 11-26-2009 09:15 AM

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

strictlypersonl 11-27-2009 05:58 AM

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.

http://www.clubcobra.com/photopost/data/500/Manny2.jpg

Snakebit 11-27-2009 07:20 AM

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.

*13* 11-27-2009 07:25 AM

So the bypass is necessary! Kinda what we were thinking.. Thanks for your input!


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