Hot Rods The Belly Button Bucket Build Thread

This morning, I leaned all 3 carbs by 1 jet size, so now I’ve got 62 pri and 61 sec.

Did some driving today- it was supposed to rain but the forecast shifted …

The AFR readout today was not consistent with previous testing, also not consistent throughout the test, so I’m not going to make any changes. If anything, after confirmation of some more driving, I may go back to the previous jetting. The drive out, after the car was warmed up, was what I expected to see, although the weather should have made a richer condition. On the drive back, I was lean everywhere like back before I started tuning. Like I said, invalid test session. Plugs are a golden brown and it looks like I could probably tickle a couple more degrees of timing into it, but I’ll wait for better weather and more testing.

I drove out to the lake and to a spot where I like to look at birds. As soon as I got there… pouring rain. Managed to get home without issues, and took some decent pictures of the outing.

 

You might want to try giving it a little choke on the next drive to confirm AF is reading well. Quick, easy way to confirm, and gives you numbers (if it's accurate) for amount of enrichment gained on the knob.

 

Another successful outing- about 20 miles round trip out to look at birds and enjoy the river. Only one picture taken though.

 

Drove the car 50 miles today. Went to show the guys who welded the suspension and chassis, and all around Vancouver. I adjusted the squirter pump shot again- didn’t do anything, so I drilled out to the next size- that showed an improvement. Might need to go one more size up, but the off idle stumble is about gone. I also bumped up the main jets from 62 to 64 - much better at cruise. Previously at the top end, it was pretty lean, and I hadn’t seen that in previous testing because I wasn’t getting up to freeway speeds. I also leaned out the secondaries from 61s to 59s because as best I can tell, AFR was in the 10s. Holy cow that woke it up. Not sure what the AFR is now because it spun 1st from a roll and kept spinning when I grabbed 2nd. Absolute rocket ship lolol. I love this car.

I also adjusted the rear proportioning valve so it’s all the way open now. The car brakes decently now - I think it needed that fluid being sent rearward to help slow the rotating mass of the rear tires- front brakes weren’t really doing it. Not sure if I’ll have any more test sessions this season, but the last couple days have been amazing.

 

Awesome

 

MAN! how did I miss this!?!?

First drive, tuning, and a bunch of photos out in the wild?

I'm here for it!

looks great and sound like you are dialing it in.

It's interesting to hear the differences from your tri-power and my single, i'm running a 66 jet on mine.

 

Thanks! On the carb, I threaded them for Holley jets, so for all I know, a #64 Holley jet may be equivalent to a #66 Rochester lol.

 

oh nice! yeah I have no clue on holley jets, rochesters are in thousands of an inch.

 

@BigJoeArt Judging by your own thread you have been all over the place, often out on the road at or before sunrise. Glad you got caught up!

 

This might help?
https://www.carburetor-blog.com/knowledge-base/holley-jet/
I remember reading that it wasn't just the hole, but the taper above the passage that determined the flow. Note 80-82.
Anyone watching water go down a funnel should get that.

 

More testing today. Went to the hardware store, came home to make a change, then drove out to the lake. I’m just about there I think. Famous last words. Made a sound clip by setting the phone down and hitting record. Fuel pump is right under the floor so you hear that more than you hear the exhaust note, but it still communicates the feeling inside the car.

 

Sounds good
Dan