Case Study # 33 - Helix Silencer sucks
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From: 2003 Evo VIII - Silver
Originally Posted by berkel
Hey all,
Just battled CT traffic on 95 and got home.
Wow, car is a monster. I love it.
I was surprised at how much the silencer stole. The funny thing is it made the most horrible noise on the dyno at WOT in the upper rpms. I think everyone was surprised at the horror of the shrieking tea kettle. It sounded much better without the silencer obviously. I did drive the car without the silencer when I first installed the cams at DSG (www.dentsport.com), so I knew it took power, I would have guessed 25 HP as well, not 50. I guess my Butt Dyno sucks!
Leaving with 80 more HP was definitely cool, lol. Al rocks, and IMHO he is actually a very nice guy, hehe. Car is super smooth. I know everyone says it, but it really does transform the car. I was happy to see 300, then 312. When he got the other ~20 HP it was even sweeter. I also found out my boost gauge reads way low, so all this time I thought I was running 20 psi, I was really running ~18! I teed it next to the FPR, so that's probably why...
Nice to meet the Pruven guys and a couple of evolutionm.net/evo-ny members.
Al question, did you do the idle modification for the cams? Car does idle better, but wasn't sure if it was just from resetting the battery. On the other hand, the idle isn't that bad with the 262/272 setup anyway.
Again, thanks to DSG, Pruven, and of course Al/Dynoflash! Updating my sig now...
FB
Just battled CT traffic on 95 and got home.
Wow, car is a monster. I love it.
I was surprised at how much the silencer stole. The funny thing is it made the most horrible noise on the dyno at WOT in the upper rpms. I think everyone was surprised at the horror of the shrieking tea kettle. It sounded much better without the silencer obviously. I did drive the car without the silencer when I first installed the cams at DSG (www.dentsport.com), so I knew it took power, I would have guessed 25 HP as well, not 50. I guess my Butt Dyno sucks!
Leaving with 80 more HP was definitely cool, lol. Al rocks, and IMHO he is actually a very nice guy, hehe. Car is super smooth. I know everyone says it, but it really does transform the car. I was happy to see 300, then 312. When he got the other ~20 HP it was even sweeter. I also found out my boost gauge reads way low, so all this time I thought I was running 20 psi, I was really running ~18! I teed it next to the FPR, so that's probably why...
Nice to meet the Pruven guys and a couple of evolutionm.net/evo-ny members.
Al question, did you do the idle modification for the cams? Car does idle better, but wasn't sure if it was just from resetting the battery. On the other hand, the idle isn't that bad with the 262/272 setup anyway.
Again, thanks to DSG, Pruven, and of course Al/Dynoflash! Updating my sig now...
FB
Hmmmmm,
I remember seeing how an intake makes about 10 more peak HP, but really helps in the upper RPM. My TQ does fall off fairly quickly at ~5500 rpm, but I bet an intake would help. That may be my next purchase, although I promised myself (well the wife) that I was done for awhile, hehe.
Take care,
FB
I remember seeing how an intake makes about 10 more peak HP, but really helps in the upper RPM. My TQ does fall off fairly quickly at ~5500 rpm, but I bet an intake would help. That may be my next purchase, although I promised myself (well the wife) that I was done for awhile, hehe.
Take care,
FB
Originally Posted by berkel
I also found out my boost gauge reads way low, so all this time I thought I was running 20 psi, I was really running ~18! I teed it next to the FPR, so that's probably why...
Did you fix the boost issue before or after the 300 and 312 whp pulls? Just wondering how much of the huge jump from baseline to final result was due to tuning vs. additional boost.
Thx.
Originally Posted by berkel
Car is super smooth. I know everyone says it, but it really does transform the car. =FB
Al has a great flash no doubt.
Originally Posted by EVO8LTW
What's wrong with teeing next to the FPR? Where did you relocate to? I'm tee'd into the BOV line. Not sure if that's an okay location.
Did you fix the boost issue before or after the 300 and 312 whp pulls? Just wondering how much of the huge jump from baseline to final result was due to tuning vs. additional boost.
Thx.
Did you fix the boost issue before or after the 300 and 312 whp pulls? Just wondering how much of the huge jump from baseline to final result was due to tuning vs. additional boost.
Thx.
I meant to ask where they teed the other gauge, so I could check if mine read differently at that location. I would guess they teed at the tubing on the driver's side rear of the valve cover, the little section of hose? We tested and my gauge read about 23/24 when the other gauge read 20/21. It's weird to see a reading that I think is too high. No knock either so, I should be ok. I think we turned the boost down ever so slightly when leaving for a little extra margin.,, Maybe gave up a few ponies, but I can throw some 100 octane in and probably run another psi of boost or so..
Take care,
FB
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