turbo sizing

[shearer]

18g's are junk. We've ran them before and have alway gone back to the 16g and have run better. This is the DSM'r in me speaking out. With either twin 16g's or 20g's on a 460" motor they would need the 10cm t3 flanged housing with a good clip on the exhaust wheel to keep back pressure down.

The EVO 16g's are surprisingly efficient turbos. They are a reverse rotation turbo but there exhaust side is way to small for a 460" motor. backpressure would be through the roof and it would prove difficult to control shaft speeds with the little internal wastegate.

Twin GT35r's with a t4 housing would be an awesome choice but very pricey. $1350/ea my retail. A customer of mine recently made 668hp on a 122" motor with a single gt35. Twins on a 460" motor would easily net 1200hp in the mid 20psi range with a good set-up.

If it were me I would slap twin 60-1's on it. They are a good low pressure turbo that can support 500-600hp each depending on wheel and housing selections. They are relatively cheap, common, and are now available with a newly released ball bearing CHRA from Garrett. I ran 128mph in my talon, which weighed 3400lbs, back in 2000 with just one of these.