I brought my B17 Civic back to Jason Herrera (aka St00pid) this weekend for a retune. Since the last time he tuned it I removed the restrictive cat, installed my Flow Stack, and exposed the cam gears for tuning. Motor is a 100% stock B17 shortblock, head has mild port, bowl and chamber work, Omni flatbottom valves, 0.020" shaved on head with OE 3-layer gasket, omni valvetrain and BC3+ bump sticks, oh and I cleaned up the IM runner some. Base line pull left me a bit discouraged, as it was choppy and making very little compared to previous year. Adjusting that cam timing is when this thing cam ALIVE. It’s a different car now. Wow!. We picked up 20whp in spots. Unfortunately the ignition pickup was not functioning properly, so the only good data is the power vs speed graphs. But look at the difference. Jason did tune the car with motor before we started making cam adjustments, but it didn't smooth out the power much and gains were minimial. It was the cam timing that woke this motor up. Just a couple graphs to chew on. Final cam timing with my STR Pro 570 gears, which by the way are super easy to read and dial in, were +2deg EX/+2deg IN. Started by advancing the exhaust, +1, +2, then +3, dialed back to +2. Dialed in -1 on intake, then reversed to +1, then +2. After tweaking the exhaust, gains were minmial, so I settle with the +2EX/+2IN.

Before and after from this weekends tuning


Comparison of 2005 Tune vs June 06 Tuning

 

Wow man thats sweet! Super simple build with some pretty decent results, what header are you running?

 

Simple and reliable, that may goal. Running the B16 DC 421 1-piece.

 

Nice numbers, strong engine.

Are you using the BPI stack on this build?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by BryanPendleton &raquo;</TD></TR><TR><TD CLASS="quote">I brought my B17 Civic back to Jason Herrera (aka St00pid) this weekend for a retune. Since the last time he tuned it I removed the restrictive cat, installed my Flow Stack<U></U>, and exposed the cam gears for tuning. Motor is a 100% stock B17 shortblock, head has mild port, bowl and chamber work, Omni flatbottom valves, 0.020" shaved on head with OE 3-layer gasket, omni valvetrain and BC3+ bump sticks, oh and I cleaned up the IM runner some. Base line pull left me a bit discouraged, as it was choppy and making very little compared to previous year. Adjusting that cam timing is when this thing cam ALIVE. It’s a different car now. Wow!. We picked up 20whp in spots. Unfortunately the ignition pickup was not functioning properly, so the only good data is the power vs speed graphs. But look at the difference. Jason did tune the car with motor before we started making cam adjustments, but it didn't smooth out the power much and gains were minimial. It was the cam timing that woke this motor up. Just a couple graphs to chew on. Final cam timing with my STR Pro 570 gears, which by the way are super easy to read and dial in, were +2deg EX/+2deg IN. Started by advancing the exhaust, +1, +2, then +3, dialed back to +2. Dialed in -1 on intake, then reversed to +1, then +2. After tweaking the exhaust, gains were minmial, so I settle with the +2EX/+2IN.

Before and after from this weekends tuning


Comparison of 2005 Tune vs June 06 Tuning

</TD></TR></TABLE>

 

nice ...thinking of building my b17, good info

 

very impressive.

my friends b17 made 155whp 109 tq (stock b17 head, block, manifold & tb)
iceman intake, dc 4-2-1 header, high flow cat, rsr exhaust and ctr cams.

yours also has TONS more midrange!