Post by daveyofave on Jan 29, 2024 21:46:20 GMT -5
Jetspecs has outputted a value of 5.0 inches for my flame tube diameter. I was searching online and have found one 6.0 inches. What occurs when having a flame tube diameter higher or lower than what jetspecs calculates? Also, the pipe has a 16 gauge thickness, does that seem too thin? Maybe I should perform some rupture analysis? JK JK Also I was wondering if anyone knows why the standard flame tube diameter is 3x the compressor inducer diameter. I emailed Mark Nye but he said Jetspec was created by someone else. The turbo chosen may not have been the most optimum for thrust performance, but I think will be best for just having something that whines.
Exhaust Inlet (Turbo Manifold) Flange: Standard T3 Flange
As the guy who made up the numbers in Jetspecs I guess I should answer your questions, Jesse created the software .
3X inducer dia was made the rule of thumb for smaller turbos due to their lower pressure ratios and general poorer ability to be made into a GT , they also being the cheapest to purchase meant that guys generally didn't have the means to build with the required sophistication , so a generously proportioned flametube produced a greater chance of success .
If there is care put into the build then 3X inducer AREA for the flametube cross sectional AREA will suffice .
52.7mm inducer =2181 sq mms , X3= 6543 sq mms or a flametube ID of 92mm will be enough , so a 4"SStube inside a 6" outer tube would do the job .
Your turbo is small enough to be fueled by a 9kg-20 lb BBQ cylinder of propane , propane is a very forgiving fuel and burns fast , so its not necessary to have an oversized flametube .
Your turbo's comp/turb sizing should be OK , though your turb A/R might cause some problems with reaching full flow potential..............be careful of your turbine temperatures .