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Switch to hydroboost, it's not hard and it is worth it.
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Definitely switch to hydroboost brakes, the factory vacuum brakes suck. Plus the engine bay looks better |
Ok, 2 guys who know what they're doing suggest hydroboost. Any clue what the cost of switching is?
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$200ish depending where you get everything. I made a huge write-up about it on here a few years ago.
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That ain't nuthin too scary. I'll look for your writeup.
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Atomic, found your writeup on the H-boost switch. Great writeup!
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I bought my setup from a company on eBay called “just Chevy trucks” came with pump, hydroboost and master cylinder, and all the lines. You need a different pedal tho, the Hydroboost pedal has a different mounting location for the pushrod. The eBay company was the best bang for the buck that I found. And I researched the pedal and purchased it new from GM online as well for maybe $35 |
Originally Posted by MrHorsepowerLSx
(Post 5447889)
I bought my setup from a company on eBay called “just Chevy trucks” came with pump, hydroboost and master cylinder, and all the lines. You need a different pedal tho, the Hydroboost pedal has a different mounting location for the pushrod. The eBay company was the best bang for the buck that I found. And I researched the pedal and purchased it new from GM online as well for maybe $35 |
Originally Posted by Northeastconfederate
(Post 5447391)
Can someone address the area ratio question?
Also Tig's question about hot side tubing is a good one. I know a little bit about the effects of pipe diameter on flow rate (velocity) vs pressure, at least in pump and piping systems (I'm a power plant operator). Though how that fluid dynamics theory applies to hot exhaust gas movement and turbo function, I'm not sure. https://ls1tech.com/forums/forced-in...er-pipe-3.html Copied from that thread by Phil, post #41 "Here is some data from real world applications that perform at the top level of competition. From my import days I learned how important velocity was.... - 632 BB with twin 94s, 3.5" crossover 8300rpm, 35# of boost will make 3500hp 1100fps in the crossover - 525BB with Twin 88s, 3.5" crossover 8500rpms, 42# of boost 1050fps in the crossover (my turd which has gone 164 @ 3300 to the 1/8 mile) 438" small block with 106, 2.5" crossover 8500rpms, 40# of boost 900 FPS in the crossover Lets say a 346 would make 450 at the tires NA, you would need 14-15# to double the rwhp assuming its built correctly 346", 15psi, 7500rpms 2" crossover yeilds 550 fps 2 1/8" crossover yeilds 480 fps 2.25" crossover yeilds 430 fps 2.5" crossover yields 350 fps" |
Keep the mach number under 1 and itll be fine. Speed of sound goes way up with temperature and pressure, so you can get away with a lot smaller pipes than you could on the cold side.
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