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How much vacuum do your motors make? I took a reading from the pcv hose and it was about 4-5 but bouncing all over between 0-5. If I brought the rpms up it would go to about ten but still jump all around. The car runs rich at idle and I think it’s because the base timing is at 14 degrees and...

I might have 2000km on the motor

Yes exactly.

Another question. The Holley xp carbs don’t have vacuum ports on the plate. Is it possible to get a correct vacuum reading from the Pcv hose?

Cylinder 8 the first two was cylinder 2

How does this look to you guys?

I just thought of a question not sure if this would matter. I’m running the Holley 850 Xp but I’m running a open gasket with the duel plane intake? It does have the notch center. Could this cause my issue?

I may break down and buy a duel a/f gauge to see what it’s running at in all areas of the throttle curve and load range.

If it was the intake if I spray intake cleaner around the outside and under the intake if it’s a leak I should be able to hear a change in idle correct?

The intake was new in box

10.5 : 1

I also had the intake off and reinstalled with new gaskets.

Click on the picture it will get bigger

400/512. Edelbrock performer rpm, trick flow 240, crane hydraulic roller 252/258 @ .50, 2 1/8 Tti headers, Holley 850 Xp, hs roller rockers.

I did a 512ci stroker a few years ago from a 400 Chrysler. I had the engine Dyno and it was running a bit leaner on the right side over the left. Just wondering if this is a normal trait for a duel plane intake on bb mopar because of different intake runner length? Being on a dyno this was...

What size of fuel line are you running? Has to be at least 3/8.

I did a 512 last year and have been lucky with my cooling system. My car runs 180f down the highway and will run 200-205f if I get stuck in traffic. It always cools down out on the highway. You are saying that you are running hotter on the highway. This would make me believe that you are not...

Prnd21 was correct. I called crane with my part number and they are a full travel lifter with a pre load spec of .080. 1 1/8 to 1 1/4. I was setting them to Harland sharps instructions. My ticking is gone I still have ramp noise but with extreme energy cam there is no getting away from some...

Thanks for the suggestion I’m going to see if that’s a possibility.

I’m super disappointed in the quality of the hydraulic lifters and whats even worse is the company has no consequences for pumping out junk that they don’t have to warranty. Not happy at all! I went hydraulic because they are supposed to be more reliable and less maintenance then solid. I could...