Turbo education and planning
Sep 17, 2018 | 11:16 AM
#27
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
Sep 17, 2018 | 06:51 PM
#28
Thread Starter
Launching!
Joined: Mar 2016
Posts: 201
Likes: 12
From: Cumberland Plateau
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
Oct 7, 2018 | 03:21 PM
#29
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.
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"
Oct 7, 2018 | 07:15 PM
#30
Joined: Jan 2006
Posts: 16,282
Likes: 438
From: Huntsville, AL
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.