862 s Vs 243 s.....

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Originally Posted by pl4yboy

The reason 862s work well is because they can achieve a higher CR. The 243s flow much better but require a heavy mill to get the compression back to stock.

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Put well

I've got ported/polished/milled 862 heads on a 5.3 and I have to say that they did wonders vs. being in stock form. I couldn't say how much HP they added because I did a cam swap at the same time. They're currently going back on that same block just bored to a 5.7 this time around.

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Originally Posted by suburbazine

I've got ported/polished/milled 862 heads on a 5.3 and I have to say that they did wonders vs. being in stock form. I couldn't say how much HP they added because I did a cam swap at the same time. They're currently going back on that same block just bored to a 5.7 this time around.

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How much did it run you to get you lr 862s worked on?

$600ish for the port & polish on top of $250 for the millwork and spring install. The shop I used doesn't do port & polish very often, I only got it done because I was a regular customer.

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Originally Posted by suburbazine

$600ish for the port & polish on top of $250 for the millwork and spring install. The shop I used doesn't do port & polish very often, I only got it done because I was a regular customer.

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Badass bro

AI is supposed to have a killer CNC program for the 862 heads.

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Originally Posted by ss454327

AI is supposed to have a killer CNC program for the 862 heads.

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Thanks bro i'll look into it