sspower23

LS1 eninge, 228 cam .580 lift-112lsa. Whats the best AFR heads to flow with this cam? 205s, 225s or 235s?

99 Blue Bird

iTrader: (3)

i could not tell you man. i would like to know as well. but is there any reason your switching from the prc heads? cuz the ls6 stg 2.5 have a higher intake flow but the exhaust flow is better on the afr's the 205's that is. sorry this is a bit off topic but im lookin into buyin one of the two sets and wanted to know if the prc heads are just garbage since your thinkin of switchin over.

vettenuts

iTrader: (4)

205's. Two suggestions, talk to Tony and ask Tony about his custom chamber work. No modifications to the intake port but higher flow.

Phil'sC5vette

iTrader: (4)

I have 205s for my 228R set up
See sign for numbers

TransAmcoupe98

iTrader: (10)

205's. You need a close to stock runner size to maintain air velocity in low rmp's. The 205's actually improve MPG as well. Your 225+ runner sizes are for bigger c.i applications.

vettenuts

iTrader: (4)

Thinner gasket will help too, but you need to watch compression in CA. Again, questions that Tony can definitely answer for you.

hammertime

iTrader: (1)

Good point, but since the OP has LT's, an ORY and is running a 228 cam, my guess is he must not be smogging the car or has 'connections'.

I assume you are referring to NOx?

sspower23

Connections yes. The PRCs are good but theres a guy with a 00 camaro ss, 228 cam, AFR 205s etc making 455rwhp! With that cam the PRCs give ~420rwhp but with 205s he made 455rwhp. This is why Im thinking of changing.
However I kinda knew the AFR+225s would have a lazier air velocity so the 205s is probably the best for the LS1 with a 228 cam. Any objections?