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Archive - May 15, 2017

HR heater electric Tap

HR Holden Special with a fan forced heater has been disconnected. Took the heater out to pressure check and have the following questions.
The engine has a heater tap from head which connects to a cable under the bonnet and circulates the coolant when open etc.
There also seems to be another electronic tap like that in the picture.... what does this do? It's seems to be connected to a wire which goes into heater box??
Cheers

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Vn304 into Hq

Hey jim here . I'm putting already built 304 vn into my Hq one tonner. I currently run a 253 trimatic pattern with a 350 Holley and a celica 5 speed . The vn 304 turbo pattern has been totally rebuilt with balancing porting flat tops Roller rockers head work and ground. I'm putting a carbie on top.. I'd like to put a 650 hp .. it's a daily drive and I would like it not to stop at every fuel station .. is their much difference between a double pumper and a vac sec 650 in fuel economy.. do I need thermo fans ?? How efficient is getting new pace makers coated for heat transfer..

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