Ever since I put the testpipe on, my low end went to a complete nose dive. Then again, that's expected. If I accelerate (not entering boost) it takes freakin' forever to get up and go. On a positive note, once it passes 0 psi, that thing just rips to 5 psi. Oh well, can't really complain about the trade-off though. Maybe an UDP will help.
Kris "Someday............I'll have traction problems!!!!" Tampa, FL Pinoy Turbo 2GNT
1999 HRC Turbo RS Stage 2 Auto with BOOST!!!!!!!!!!!!
Originally posted by KaptainMyke this is the greatest topic posting i have ever seen, in my entire life on the internet.
great story great attempt at racism dino goes batshit i spilt my juice i can't see my keyboard to type
this is great.
Originally posted by nappyjim make sure you let her know what the dillyo is. just tell her you was the peanut butter and she was the jelly and that night, God decided to make a peanut butter n jelly sandwhich. But let her know God dont eat peanut butter and jelly sandwhiches everyday.
#29727, "RE: Damn........I want my low-end back!!!!!" In response to Reply # 2
yeah i know man the only time you would lose low end if the exhuast diameter is increased to a point where the back presure is "gone" when you add a test pipe you are increasing exhaust flow. later "Z"
#29728, "RE: Damn........I want my low-end back!!!!!" In response to Reply # 3
It's all good though, at least the turbo spool up is much faster now. Plus, I can actually hit 5 psi consistently regardless of temp. outside. Also, EGT's were affected dramatically, like I run about 500 degrees cooler. The difference is also much noticable at night. So I say it's a good trade-off. Bad thing is that it stinks though, I sure hope they won't have that emissions back here in FL.
Kris "Someday............I'll have traction problems!!!!" Tampa, FL Pinoy Turbo 2GNT
1999 HRC Turbo RS Stage 2 Auto with BOOST!!!!!!!!!!!!
#29729, "RE: Damn........I want my low-end back!!!!!" In response to Reply # 4
Correct me if I'm wrong, but isn't the basic concept of a good exhaust system to get the air flowing in one continuous direction. And with a larger pipe size, the exhaust gases can circulate within the pipe at idle (unless there is greater air force caused by turbo, etc.) causing loss in backpressure. Therefore, during acceleration from a stop the gasses being pushed out have to work against the gasses that were circulating during idle which will result in a loss of low end torque.
That's always what I thought caused it, and someone tell me differently if I'm wrong.
Jay | Black '98 GS
Jay | Black '98 GS
AEM CAI ... NGK BKR6E-11 spark plugs ... Motor mount inserts (not yet installed) ... Test pipe (not yet installed) ... Apexi N1 muffler (not yet installed)
#29730, "RE: Damn........I want my low-end back!!!!!" In response to Reply # 5
Kris, I didn't notice a lightweight pulley on your mod list. I had my testpipe for about a week before I put on my AFX underdrive pulley. It felt like the pulley made up for most of the low end loss I got from the pipe. You may want to give it a try.
Jay, I always thought about the backpressure caused the piston to travel faster downward on the intake stroke because of the higher initial pressure in the cylander. Maybe someone else could correct both of us.
#29733, "RE: Damn........I want my low-end back!!!!!" In response to Reply # 8
Kris, I don't know what else to tell you except that the UDP should help with the low-end and the injectors won't. Aren't you running 4 pounds? Do you need bigger injecters with that? Maybe after you get that sidemount on, right?
#29734, "RE: Damn........I want my low-end back!!!!!" In response to Reply # 9
Yeah, about the 310cc injectors, when I'm able to run 13-15 psi, I was a bit worried that I might max out those 30 lbs. I see most, if not, all you Stage 3 guys have 440's. I'm not sure how to calculate injector sizing per pound of boost. I just don't wanna get the 310's when in the future, I need the 440's to run 15 plus psi.
Oh yeah MetalJim, with the testpipe on, I can actually run 5 psi consistently now
Kris "Someday............I'll have traction problems!!!!" Tampa, FL Pinoy Turbo 2GNT
1999 HRC Turbo RS Stage 2 Auto with BOOST!!!!!!!!!!!!
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