Originally Posted by Tesseracter
(Post 163541)
the 8psi sounds like a decent looking girl who dresses conservatively, but you can talk intellectually to her and she happens to be a nyphomaniac and bi-curious.
i just join the rest of the guys in checking out the hot chick with massive clevage, then turn to my girlfriend and she says "damn i'd like to see her naked" |
Originally Posted by Saml01
(Post 164158)
btw, whats the stock exhausts diameter?
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Originally Posted by Atlanta93LE
(Post 164236)
Stretch bent 1 7/8"
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Originally Posted by neogenesis2004
(Post 163025)
I don't think it matters. Hondas make 700+whp with 3" turbo back exhausts. I doubt "turbulent" flow is a concern in their minds when it comes to the exhaust.
Mark |
Originally Posted by Saml01
(Post 164158)
So whats the verdict? 2.5 inch or 3 inch when the target is 200 - 230 hp?
btw, whats the stock exhausts diameter? It didn't even spool any better to be honest. With that small of a turbine at 240 RWHP, the 2.5" system was plenty adequate and a lot more quiet than the 3" dump pipe. I subsequently made 300 RWHP on that same 2.5" system with a T3/T4 hybrid, but I am pretty sure that it is now an issue compared to a 3" system. 2.5" systems are fine up to about 250 RWHP. (I will concede that on a well designed 3" system with an external wastegate you can see benefits of a 3" system as low as 200 RWHP. YMMV) Mark |
Well then, I will have my BEGI DP go into a nice fatty 3" back pipe with the external waste gate dumping to the atmosphere.. By 2008 that is..
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Originally Posted by Saml01
(Post 164158)
So whats the verdict? 2.5 inch or 3 inch when the target is 200 - 230 hp?
btw, whats the stock exhausts diameter? My car has done 243 on a 2 1/2" exhaust. Now that the 3" dual is on, I think that the power band is much smoother. There is not the sudden sit you back in the seat. But it has not been back to the dyno. The 3" sound is deeper. I wish I had put the 3" on sooner. :) Stephanie |
The best exhaust for a turbo is no exhaust at all. Period.
Probably the pinnacle of turbocharged piston engine technology was WWII era airplanes. They ran no exhaust, turbine housing straight to atmosphere, along with lots of other fun stuff (nitrous, alky injection, cockpit boost controllers/overboost). No exhaust is unrealistic on a car but I'd never suggest smaller is better. I may suggest that smaller is sufficient but you'll always have gains with a bigger exhaust, no matter how minute they may be. Period. If you have the ability to go 3" all the way from the start, do it. If not, 2.5" will probably be fine for anything under 300hp. |
^
The pinnacle of turbocharged piston engine technology was the F1 turbo era.Where cars were making 1300+hp in qualifying trim on 1.5 liter 4 cylinder engines. |
You got me there.
What did they run for exhaust? |
^ I'm pretty sure it was open header/flame thrower.
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Originally Posted by spike
(Post 164824)
^
The pinnacle of turbocharged piston engine technology was the F1 turbo era.Where cars were making 1300+hp in qualifying trim on 1.5 liter 4 cylinder engines. Man i love F1. |
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