Should get GP403 to lock the old one to save on the confusion of two threads.
to summarize:Just got back from the Dyno.
Previous setup, same engine both times.
1971 Buick 350, 2020 Dyno
-3.0 v6 flat top pistons, roughly 9-9.2:1
-TA_310 camshaft (too big for my setup imo)
-30 degrees of timing (8 initial 22 mech)
-10.8 WOT afr, secondaries too tight as well
-Factory exhaust manifolds with NO mufflers, straight pipe dual 2.5"
******247hp/274ftlbs******
1971 Buick 350, 2024 Dyno
-same internals
-36 degrees of timing (14 initial, 22 mech)
-12.0 afr wot (changed secondary rods to thicker/leaner ones, loosened secondaries)
-hooker headers true dual exhaust, thrush welded chambered mufflers
******217hp/250ftlbs******
Pretty much what i expected for a stock bore 9:1 buick 350 with terrible flowing heads, too big of a cam, and loose converter, and 44,000 hard miles.
to summarize:
you increased timing, got a better AFR ratio, better exhaust system
.....and you LOST power and torque? 😵
Mufflers are a restriction. Especially chambered. The question is, it's 30hp less, is that 15hp per side?to summarize:
you increased timing, got a better AFR ratio, better exhaust system
.....and you LOST power and torque? 😵
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