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You will find people that will say.... go vacuum.... and there is nothing wrong with vacuum....it works well....as designed....and is real reliable. IMHO....however....the hydro-boost system provides far more breaking pressure (actual psi in the brake lines) than any vacuum setup....and even marginally more pressure over the failure-prone.... doesn't give a warning... powermaster.....
To the best of my knowledge, the powermaster was only available a couple years.... while the hydro-boost systems are still being built today on many makes/models of vehicles...... enuff said...
Go hydroboost.... you won't find a brake system any more capable of holding a car at the line.... w/o a tranny brake....
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1987 Buick GN
Currently getting freshened up....
Old Parts: 60# injectors, 3" TH DP with test pipe and hooker cat back, Walbro 340 pump, Razor's Alky, TT Chip, 3-1/2" MAF pipe with Big Mouth CA Kit and LS1 MAF, Translator.... yada yada
New parts: Ported heads with stainless valves, RJC FMIC, T&D 1.65 roller rockers, Comp XR2 Hydraulic Roller 210/215@.050 .549/.549 (with 1.65 rockers), champion ported intake, Hemco stock appearing doghouse, PT70 P-trim turbo with H comp. housing, N/A109 block bored .030 over with head studs, main studs #2 and #3 billet main caps, cometics, TRW forged .030 over slugs with hastings moly rings.
New times soon.
(1/8) 8.002 @ 86 mph 12.650 @ 106 mph with a 1.71 60' time with the stock turbo/dutt neck intercooler (best mph was 107.69 mph)
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