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I should also mention that these plugs only saw cruising conditions with light to moderate acceleration. I've yet to do any WOT pulls. I need to change my clutch disc before I can do that. Damn trans leaked oil on it and now it won't hold the power.

I've got the reusable copper collector gaskets. Last time I had the exhaust off there was no sign of leaks. I wanted to put the sensor in the header but couldn't bring myself to do it.

By the looks of the base where the threads end it is still rich. I've heard this area shows the mixture at cruising speeds. The O2 sensor is in the header collector and there there are zero leaks in the exhaust before it.

Checked the plugs after a little cruising and I like the look of the 6. The 5 just looks like it's too hot. On a sidenote the FR5s that were in the car for about 30 miles now are showing signs of still being rich which the wideband confirms. From what I've read, the ground electrode shows...

Picked up the 2 test plugs. The numbers I posted previously were wrong. I got a BRK6E and a BRK7E. Pretty sure the 7 will be too cold but you never know. I'll test her out tomorrow.

Nice chart. Looks like the 2 I listed above will do the job.

Looks like a BKR6E would be one step colder. I'll pick up a BKR6E and a BKR7E tonight and throw them in different cylinders to see the difference. That way I'll have a 5, 6, and 7 to compare side by side.

I've been reading some articles and it appears that i need a colder plug. Anyone know the next step colder from an FR5?

They only had about 7 miles of freeway driving on them so they should look pretty clean. The ones that I replaced were black.

Did a little research and I may need one step colder plug. That should move the color on the ground strap closer to the bend. These are NGK #7373

The timing is set at 32 total right now. I verified that the timing marks are correct again tonight while adjusting the valves. I used the piston stop method so I know it's right. If it's lean then the wideband isn't reading correctly.

On the ride home tonight when it was cooler outside, the 40-60mph went back to high 13's low 14's. I think I'll leave it there so it doesn't get too lean on chilly San Diego nights. I did notice it gets a little lean under light acceleration and then goes to mid 12's once the PV opens. A more...

Drove the car to work after lunch today. It's probably about 15 degrees warmer than the last time I tested it. The idle and transition definitely got richer with the warmer weather. Here's what I saw on the meter Idle 13.7-14.0 40mph 13.0-13.5 50mph 13.0-13.5 60mph 13.0-13.5 70mph 13.7-14.2...

Swapped out the 72 mains that came with the Proform body for 70s after work today. I probably won't test it out until my drive to Escondido to meet up with Mad Dart tomorrow. I also changed the plugs because they were pretty nasty from running so rich up until now. Once the main jets are dialed...

Haha. Yeah but double digit MPG would be nice....

Interesting graph. Since it's a nice cool night out and traffic is minimal, I figured that some more tuning was in order. I drove it to work and the last numbers I posted were pretty accurate. Anything above 50mph went rich to mid 12s. I enlarged the air bleeds another .002 for a total of .005...

Increased the idle air bleeds by .003. It was difficult to do the same cruise tests as above due to rush hour traffic but I managed to get some info. I couldn't get above 60mph this time. Up to 50mph the curve definately leaned out some but above 50 it richened up pretty quickly. I wonder if the...

Drove the Dart to work after lunch today. Seems to be running about the same which is what I expected. It's currently setup with all the Jets that came with the Proform body. As you can see she's very rich while cruising. After work I'm going to adjust the idle mixture screws to see if the idle...

I guess I'll soon find out. The carb definitely looks like it means business now.

No I didn't check. I swapped to this body so I could increase the air bleeds if I need to lean it out.

Carb body swap was so easy I could have done it in the dark. Fit and finish was great. Hopefully the tuning goes just as well.

Pulled the carb off so I can swap in the new body at work tomorrow. Was tempted to do it at home tonight but I just cleaned my condo and don't want it stinking of gas for a month. I also need to get some carb studs tomorrow. The bolts were supposed to be temporary...

I thought it listed 850 on the package but I guess it doesn't.

It should. Says it flows up to 870CFM and fits all 650, 750, 850 DP with mechanical secondarys.

HAHA! Yeah, that's quite the claim they are making. I'm sure some gain is to be had with increased airflow but 25HP!! I've heard they're great pieces though.

Proform main body arrived today. Should be able to get it swapped in tomorrow night so I can get back to the tuning. I'm going to start with the jets included in the Proform kit. Comes with 72/84 for the mains and 36/73 for the air bleeds. I'll also switch back to the stock 6.5PV from the...

Let me know if you're gonna make it to Grand. I may meet you there.

Got it from autoplicity.com. Total was $120 with the 30offshipping coupon code.

I decided to go with the Proform main body. The mod to the one that I have would be simple but I like the fact that the Proform gets rid of the choke horn. I never use the choke anyways. If anyone is looking for a manual choke main body for a Holley DP I'll let it go pretty cheap.

Good point. Would it be worth it to do the high speed bleeds as well? Do you happen to know the thread size?