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> At what displacement are external coolers needed?, Building an alternative engine for my six
Speedo
post Aug 12 2019, 02:24 PM
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I have read that the general consensus is above 180 hp an external cooler is needed.
I am at a crossroads with the 2.2 T I am building. I have 2.2 S pistons and cylinders and and cams. If I stroke it I get a higher cr 2.4 S. If I don't stroke it I get a decent 2.2 S which would still be a nice choice. I have everything I need for the 2.2, but if I stroke it I will need to source a 70.4 crank. Curious what the board thinks about the "red line in the sand" for needing cooling. It goes without saying that I am not interested in cutting on the six for a cooler up front.
Having said that...I spoke with a friend over the weekend with a 76 911 with a 3.2 transplant that doesn't run a cooler. He says his temps never go over 210...which I question as I have a stock 74 2.7 with a modified pulley setup that runs 200 but will show 230 when pushed. I think I need to measure his temps with a pyrometer to double check his temp gauge. (IMG:style_emoticons/default/bs.gif)
Tell me what you guys think! (IMG:style_emoticons/default/idea.gif)
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thelogo
post Aug 12 2019, 06:04 PM
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Just seems like common sense to me if you have
A higher performance air or oil cooled car .then you need a oil cooler unless you live in alaska .

Stock coolers do and can work well but front cooler are great insurance in case your caught in traffic

I could see not using one on a stock 1.7
But when your engine starts costing more then 5k
Budget for a remote oil cooler /heat exchanger
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