AFR 205 59cc..

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Feb 13, 2016 | 04:34 PM

Aussie_LS2

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AFR 205 59cc..

I've come across a set of used AFR 205 59cc heads here for the same price as ported 243's. Problem is there's no data on them on the AFR website. Am I right in thinking these are the equivalent of a standard head 243 head that have been milled 0.0327 if 1cc = 0.006 of milling and the 243 head is 64.45cc? Will these heads do the job with a 227/235 comp cam or are they a touch small these days (I'm just assuming since everyone has 215/225 heads)

Feb 13, 2016 | 04:42 PM

gnx7

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I ran them out of the box with a 233/239 cam, ls6 intake, ported TB stock LS1 and made 440rwhp/385rwtq at 62cc with a 90* bend in the intake. A straight shot intake like a Vette would add another 10-15rwhp.

2900lb car with driver went 128.3mph in the 1/4.

Feb 13, 2016 | 09:14 PM

Jimbo1367

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If you snag the AFRs make sure they are stock port job. I would hate to have someone other than AFR or Mamo touch them (screw them up)

Feb 14, 2016 | 01:57 AM

Aussie_LS2

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No they just been milled down. Have 10k miles on them but have only have .600 lift springs fitted. Will there been much of a difference compared to cnc'd and milled 243 heads with a 227/235 cam?

Feb 14, 2016 | 07:06 AM

redtan

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Quote:

Will there been much of a difference compared to cnc'd and milled 243 heads with a 227/235 cam?

They should make comparable power up top, but will make killer torque down low simply because of the smaller and more eficient port.

Given the same price, I would take the AFRs all day long. However for the right price and in the hands of a proper porter, the 243s can be very good esecially bang for the buck.