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On my 16ss we made about 850 on 14-15 psi of boost with a non-ported 2650 and forged Manley short block, cam and stock heads except for springs. That was on MS109 race fuel and meth.
When I broke that stock Lt1 crank, bought a stock Lt4 short block with Btr cam from Carlyle racing, we did go to a bigger springs but the heads were still stock. It still made about the same power, we never had high intake temps at those power levels. We could have made much more power, but at that time in 2019 the fuel systems were still high priced and with the Lt4 fuel system upgrade with a boost pump we just didn't have enough fuel to make more.
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