265 Hemi to efi

Converting To Delco ECU From Carby Or Other Injection Systems
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Re: 265 Hemi to efi

Postby Holden202T » Thu Oct 25, 2018 6:09 am

Thanks for the info ill look into it!

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Re: 265 Hemi to efi

Postby heff0018 » Thu Jan 10, 2019 1:23 pm

Hi all

I have been sorting out some radiator problems over the holidays. Seems like the heat from the bigger turbo has overwhelmed the stock radiator but I had a aluminium one lying around that was the right size and configuration. I also needed to relocate the power steering pump so that I could offset the radiator to one side and allow enough room to get a proper cold air intake setup happening.

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Re: 265 Hemi to efi

Postby heff0018 » Thu Jan 10, 2019 1:29 pm

Found a Camry over flow tank with factory mounts fitted nicely. $12 from Upullit.

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Its going to be real hot in Adelaide soon so will be able to test it under extreme conditions.

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Re: 265 Hemi to efi

Postby Holden202T » Thu Jan 10, 2019 1:47 pm

nice and out of the way!

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Re: 265 Hemi to efi

Postby heff0018 » Thu Jan 10, 2019 7:29 pm

The tank might get toasted by the turbo but are cheap to replace

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Re: 265 Hemi to efi

Postby heff0018 » Thu Jan 10, 2019 7:46 pm

Still not 100% happy with the radiator so I have shoehorned an even bigger unit from a CL into it. The current aluminium one is fine at cruise where the temp sits at around 80 degrees, it’s also ok in heavy traffic stopping And starting but if I pull up and stop at idle it hits 100 degrees in about 5 minutes. It’s 39 degrees tomorrow so will be good test conditions
Last edited by heff0018 on Fri Jan 11, 2019 7:08 am, edited 1 time in total.

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Re: 265 Hemi to efi

Postby delcowizzid » Thu Jan 10, 2019 10:23 pm

Nothing beats copper and brass radiators for cooling and get a shroud on it so the fan works instead of paddling air around in a circle
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Re: 265 Hemi to efi

Postby heff0018 » Fri Jan 11, 2019 7:16 am

That was something I wasn’t sure about re copper vs aluminium. Another bonus of using the later model CL radiator is that is comes with a factory shroud. I reckon if I persevered with the aluminium setup and modified a shroud to suit the smaller radiator it would have improved the overheating at idle problem. It’s just I know with my old CL charger Which had the same radiator setup I could idle for long periods without any overheating. The difference is of course the turbo.

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Re: 265 Hemi to efi

Postby Charlescrown » Fri Jan 11, 2019 8:14 am

I don't think there's much between alloy and copper. Yes copper is better but is it that much better. Where did you get that fan. It doesn't look like a Valiant one to me. Why not put a couple of thermo fans on and set the temp to say 85 deg.

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Re: 265 Hemi to efi

Postby vlad01 » Fri Jan 11, 2019 5:04 pm

alloy is usually a lot better as the limiting factor is the solder on copper ones where as the alloy ones are all alloy, even the brazing is aluminium . The solder has a far worse thermal transfer than aluminium , about 1/4 of the rate iirc. So the solder joints on the fins are the bottle neck, also brass is worse than aluminium too. This is why copper rads are 50-100% thicker than alloy ones for the same cooling capacity.

This can be verified here.


https://www.engineeringtoolbox.com/ther ... d_858.html
I'm the director of VSH (Vlad's Spec Holden), because HSV were doing it ass about.

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