Header Dyno tests

[Devil Dog]

Hi everyone. It's been a long time since I have posted here. I hope everyone had a great Holiday season. We have been trying to catch up on production and projects in the shop. The long awaited "Header Dyno test" took longer to get done than i had planned. But my car had some problems with the differential and I didn't want to take it to the dyno until they were resolved.

Well, I finally made it. I drove up to Bellingham, WA yesterday to (MPS) Meridian Performance Services. Vince from Trifecta Performance went with me to record date and tune the car. I drove up with the TRI-Y header with ports 1 & 4 and 2 & 3 matched and stock tuning. I have all the graphs and date sheets but need some time to compile a report. I am also waiting for Trifecta to complete a report on his observations.

In the mean-time here are some fun facts I kept track of on my own:

My home to Bellingham with a stop in Duvall - total miles 135.4
Fuel economy - 26.6 MPG average.
Average speed - 49 MPH
Everage coolant temp - 192F
Highest speed reached - 83 MPH

While car was on the dyno:
total miles - 30.1
Fuel economy - 11.1 MPG average.
Average speed - 32 MPH
Highest speed reached - 137 MPH

Drove back with the stock manifold and stock tuning.
Bellingham to my home with a stop in Duvall - total miles 136.7
Fuel economy - 26.7 MPG average.
Average speed - 50 MPH
Average coolant temp - 192F
Highest speed reached - 75 MPH

I brought along the other TRI-Y header with ports 1 & 3 and 2 & 4 matched, a shorty header and the stock manifold. My car was bolted down to the dyno for 6 hours. There was enough room underneath it for me to access the bottom and swap headers without having to un-strap the car. I averaged 35 minutes to remove one header and install the next. All headers and stock manifold tests were conducted on a Dynojet dyno.
Each test was performed through a hi-flow cat converter and 2 1/2" exhaust with a single outlet muffler. The hi-flow converter was set back in the tunnel to allow the long tube headers to be bolted directly to them. The shorty header and stock manifold were bolted to the same converter via an extended hook-up pipe. A wide band O2 sensor was installed in the O2 bung behind the hi-flow converter and each header/manifold allowed the stock front O2 bung to be installed in the collector or manifold.
The owner of the shop had a decible meter but I didn't know until I had already made the first header swap. The shorty header and TRI-Y (1&3, 2&4) were both 102 decibles at 6800 RPM. The TRI-Y header (1&4, 2&3) and stock manifold were not read. However, they both seemed somewhat quieter without knowing a reading.

I will get the graphs and data sheets posted as soon as I can.
Over-all it was a fun and very informative day. I was surprised by the over-all results as were Vince of Trifecta and Tim of MPS. I'm sure you all will be just as surprised.

Results coming soon.

Thanks.

[RedHeaded RedLine]

Originally Posted by Devil Dog

. The long awaited "Header Dyno test" took longer to get done than i had planned.
In the mean-time here are some fun facts I kept track of on my own:
I will get the graphs and data sheets posted as soon as I can.
Over-all it was a fun and very informative day. I was surprised by the over-all results as were Vince of Trifecta and Tim of MPS. I'm sure you all will be just as surprised.
Results coming soon.
Thanks.

Has the potential to be the best thread EV-ER. -J

[Devil Dog]

Here ya go everyone. Grab a drink, sit down and enjoy:

Ecotec 2.4 NA Dyno Results

[bones]

wheres the base line test with the stock header- and with a custom tune?????

[Bruce]

Originally Posted by Devil Dog

Here ya go everyone. Grab a drink, sit down and enjoy:

Ecotec 2.4 NA Dyno Results

Very nice presentation Dan.

Thanks!

[Randy@DDMWorks]

Originally Posted by bones

wheres the base line test with the stock header- and with a custom tune?????

Check page 7

yellow line = stock manifold/stock ecu
green line = stock manifold/custom ecu

[Devil Dog]

Thanks Randy...

Also, Page 6 shows TRI-Y vs Stock with both stock (yellow line) and custom programming (green line).