Finally finishing up my third project car. One to go.
4 Foxbody Builds at Once!
Just dyno'd with the Vortech Ti yesterday. It's a fairly mild build for daily driving with goals of 600rwhp, no bucking, quiet, ice cold AC, heat etc.
First video is N/A tuning and deciding between a Hogan Box or a Systemax upper.
Details of combo are in the video so no need to relist here.
Running the numbers I went with the Hogan Box for supercharging.
N/A box intake 320 rwhp / 340 rwtq
First pull 16lbs w/ timing waaay down and fuel rich 398/397
16lbs tuned fuel and timing 517/459
16lbs w/ meth, changed timing only 611/531
I initially took my N/A timing curve and calculated timing based on
1 deg/lb below 4k
1.25 deg/lb below 5k
1.4deg/lb above 5k.
Then did a global -4 deg at WOT for the initial pull just to be safe.
From there, dialed in fuel to stay between 12.5 to 12.0. Once fuel was dialed in bumped up timing looking for at least 8hp increase for each degree of timing. The whole curve moved up and eventually the increase below 4k started to narrow so started adding timing only up top.
After tuning without meth I added meth around 4000rpm and started moving timing up in 2deg increments for 2 pulls and then 1 deg until I got less than an 8hp increase and backed off 1 deg from that.
Result, Almost 100hp increase from meth. You can see the IAT temp difference with meth. N/A was obviously a different/warmer day and it was slightly cooler by the last pull but ECT was the about 180 for all pulls.
Numbers are SAE.
I've attached what changes I made in case it helps anyone trying to tune a similar combo. Pics show changes in timing for each combo. I used Tweecer RT with Binary editor on this car.