David Buschur's RS/BADBISH 2010 build
... I have stated before in the past my feelings on twin scroll set ups. My thought has been that the smaller runner tubing hurts the power at high horsepower levels. Ron and I both thought that this test would result in some very good gains in the low/mid range power, which the gains are substantial enough to justify the header on a car that isn't looking to run 8's like mine.
As you know, evodan2004 has a TS HTA3586 with the smaller diameter primary tubing, while my TS HTA3582 has the larger diameter. From what I can tell in comparing our 93 octane info, the difference is right about exactly enough to offset the difference in spool between the two turbos.
Good stuff!
Hey Dave, just after reading through the entire thread and seeing the differences between the small and large runners, have you guys thought of taking a look at the idea of having different internal runner area? Basically if you've ever looked at a two stroke quad or bike, about how the exhaust diameter is small when it first comes out, then expands then contracts. With this theory, you would get the stronger bottom end benefits your looking for with the smaller runner, and the top end performance with the expanded internal area.
Could be just some stupid thought, or just what you need.
Could be just some stupid thought, or just what you need.
Scorke
Ooh idea, for ya dave! Variable diameter exhaust manifold tubing! Tie it to the same switch you use for your dual-stage MBC. At low boost, it uses the smaller tubing, at high boost it uses the bigger tubing! Genius! I'm sure implementing it will be no problem 
and hey, you missed my note at the top of the last page: take this thing down the track yourself a few times this year, just for fun!
and hey, you missed my note at the top of the last page: take this thing down the track yourself a few times this year, just for fun!
Scorke
Dave you need to make some passes this year!
Did you end up advancing the camshafts and playing with cam timing?
Have you thought about putting a MIVEC head on your car to help spool up even more?
VGT turbocharger?
E85 makes a big difference in spool up time as well! Test it vs. C16 or Q16. I'm sure Crispeed has done his own testing on this.
THANK YOU DAVE! I loved the TS results. I'm super stoked that you tested it, even if you didn't believe in it... shows that you're open and willing to try anything if it makes the car faster.
Big thumbsup.
Did you end up advancing the camshafts and playing with cam timing?
Have you thought about putting a MIVEC head on your car to help spool up even more?
VGT turbocharger?
E85 makes a big difference in spool up time as well! Test it vs. C16 or Q16. I'm sure Crispeed has done his own testing on this.
THANK YOU DAVE! I loved the TS results. I'm super stoked that you tested it, even if you didn't believe in it... shows that you're open and willing to try anything if it makes the car faster.
Big thumbsup.
Last edited by R/TErnie; Feb 21, 2010 at 03:28 PM.
Sounds like your making great progress here DB. I'll be following this re-build for sure
lol