Building a beast...doing a 391

[EvanZR1]

Originally Posted by -=Jeff=-

Yep.. been to Pete's many times.. My buddy and I are meeting at Rookies in Roselle Wed evening

That looks easy enough to get to, I'd be up for meeting you guys there.

[Demps]

My lesson learned--ALL ON ME being in a hurry/meeting a schedule: radical engines should be turn-key from their magician mechanics. Taking them away before they are truly finished has the potential to yield an unfinished (read undesired) product...that costed you a lot of money.

Ted

[EvanZR1]

To be clear, the tune is done. My engine is almost an exact match for Pete's personal car (I'm one stage larger on cams), so he's had plenty of time to get baseline tuning for 391s worked out.

Any fine tuning will be exactly that, fine tuning. Honestly, I'm not really even expecting to need it, but it can't hurt to throw it on the dyno with a wide band after break in and see what it looks like, and then tweak it if needed.

I've given Pete plenty of time to make sure everything was built/done at the timeline he was comfortable with, and while it's taken longer than I originally anticipated, I'm very happy with the progress reports he's given me over the course of the build.

[-=Jeff=-]

5:30pm Wednesday
Rookies in Roselle

[Karl]

Originally Posted by -=Jeff=-

5:30pm Wednesday
Rookies in Roselle

I will be at work until 8 and can't make it

[EvanZR1]

Finally got the car back to Dallas last weekend. Car drove great on the way back, and I'm happy with the 391 build. Sounds mean and pulls hard. Didn't have any time to do anything with it other than put it in the garage before I had to go out of town for work last week, and then Friday we loaded it on a buddies trailer and took her up to the Ultima Mile in Blytheville, AR. The car ran great and did a 152MPH in the 1/2 Mile and 176MPH in the full Mile. It was the oldest car there, but it definitely opened some eyes when the speeds posted.

Some other car times for reference:
Stock ZR1s general #s at various events: 1/2 Mile: low to mid 150s, 1 Mile mid 170s to low 180s
Stock ZR1 at same track in 2016: 148MPH in the 1/2 and 177MPH in the Mile
My previous 13 GS with blower, putting down 675RWHP at the same track in 2016: 155MPH in the 1/2 and 186MPH in the Mile.

I do need to get it on the dyno with a wideband so Pete can do a final cleanup on the tune. It's good, but still rich on the top end to be safe. We can probably get a little more power out of it by cleaning up the tune, but overall I'm very happy with it. Will try to get it on the dyno and tune cleaned up before next 1/2 Mile event in Dallas in November.

Home from Pete's:


Loaded on trailer to go to the Mile:


Staged for run:






Startup at Pete's

1/2 Mile run:
https://youtu.be/9fZ0RjNkgkk

1 Mile run:
https://youtu.be/G6Va-Zh4kuU

[-=Jeff=-]

I assume no FX3 issues on the way home? Don’t forget to get he tail light wiring sorted then you have a completed car ready to enjoy

Great meeting you too

[gtcollins@maxnet.co.nz]

Cool videos

Glen

Sent from my SM-G960F using ZR-1 Net Registry mobile app

[Karl]

Awesome times and a great sounding car. The power sure is there. If you want to get out of those euro taillights and go back to stock, I will take the lenses!

[EvanZR1]

FX3 was fine on the way home other than one error which cleared on car restart. It looks like the clip on the connector may be broken, so the one that was on there may be ok. I zip tied it together when I got home and haven't had any more issues.

Started looking at the taillights when I got home, and it looks like someone wired the center brake light into them for the brake side, which causes problems when trying to rewire to use the red for running lights and brake lights (as it causes the center brake to stay on with running lights). Will have to dig in deeper at some point to fix it, at this point it's not a high priority as I don't normally drive the car at night often.