Any updates Matt? I need to get mine out to the track soon.

 

Not much has happened. I adjusted the fuel pressure up 1-2 psi to 60 psi. The long term fuel trims were +1% and +3% and the AFRs were running mostly 12.0 to 12.5 AFR, with one dip that gets into the high 11s AFR. That is a tad on the lean side and I would rather the long term trims be subtracting a little fuel than having to add. I have not got tuned yet.

The car mostly runs 12.5s to 12.7s at my Wednesday night races. I wish I could figure out how to make it more consistent. It runs 12.2s to 12.4s WITH ice in the ice tank, which I only do for special occasions.

Oh! I have a new exhaust! Again. This is version 4.

I replaced the Flowmaster Super 40 with a Magnaflow 14x9 to quiet it down - which worked. The Super 40 sounded amazing, but was super loud and had a horrid drone at 75 mph. The Magnaflow is only 50% as loud, and actually quiets down around 75 mph.

I replaced the Magnaflow y-pipe with a Flowmaster Scavenger y-pipe. I had an odd sound coming from the y-pipe and I think it was resonance from the stamped y-pipe walls. My thought was that the Flowmaster Scavenging y-pipe would eliminate this - which mostly worked. The sound is 90% gone.

I had to relocate the 3" ball joints for disassembly to new locations to make room for the longer Flowmaster Scavenger Y-pipe and Venturi 3.5" to 3" reducer.

 

I'll be venturing into the 61mm territory in a few weeks... gotta get everything figured out before the 1/2 mile race so I gotta get cracking!!!

 

Has EC addressed the issue with the 61's?

 

As far as I know, yes. I haven't mounted mine yet, I'm still running a backup