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Well edelbrock was awesome and very helpful, I can’t say enough about the guys at Edelbrock Customer Support. Dave was the guy that helped me for the most part. That said, I am almost certain that the issue was NOT Edelbrock’s fault. After talking to builders across the country about the setup I...

The 850 has cured my problems. So far. I had 2 Holley techs tell me 750DP but after explaining the richness I was getting at cruise another tech told me I definitely should have gone with an 850. The Brawler is no disappointment. It tuned in nicely after setting up my primary throttle blades...

I do have a PCV setup on it. But today I called Holley and talked to their techs dept again about it and they guy I talked to recommended going with an 850 Brawler so I ordered one this afternoon. After going around and around it seems like the undersized barrels might be causing more velocity...

I know it’s happening before the mains start coming in because I can see it happen in my wideband. Cruise will be 12.2-12.6, maybe getting into 13. But the second I tip in to accelerate lightly, keeping the pv closed and running right above the pv opening point, my afr is around 14.7-15.2. Last...

So what can I do to lean out that rich condition?

Alright, I got a few more questions here. After tuning a bit today and trying to get a baseline for this carb I’m noticing that I’m cruising on the T slots and they’re running a little rich (12.5ish). Today I pulled the carb off to check the T slots and found that the primary T slots were way...

I got ahold of Holley and ended up getting a replacement carb sent out, the off idle transition is way better now that the accel pump shooter isn’t messed up. It’s still wanting to run way rich on light throttle (10.5-11.5) making me think I’m running on the T-slots and the IFRs are flowing too...

Well, I dove into the primary accel pump circuit today and found a huge part of the off idle stumble issue, and it may help explain some of the decel richness. It seemed that no matter what size accelerator discharge nozzle I used the dead spot wouldn’t go away. I pulled the carb off, flipped it...

Tim at Hughes designed the build for me, and it’s in a heavy truck so it’s really not bad. I haven’t done a comp test yet.

Looks like I’ll be bumping the power valve up even more, 8.5 still leaves a dead spot so I’m gonna go with a 10.5 and see how that works. I’ve also got a dead spot off idle that is killing me! I’ve messed with the accel pump linkage, I’ve messed with cams, I’ve bumped the nozzle size up and...

I had it set up with an in tank pump from a 91 w250 gas pickup. That pump supplies plenty of fuel at 75+psi so I ran it to a bypass regulator originally set to 45psi and returned it back to the tank. Interesting thing about the Atomic is that it needs to have the regulator mounted after the...

Yeah it’s a bummer but I ended up getting it sold. But just like anything else, when I bought it there was so much positive and negative info out there on every system that was available that I ended up goin with the MSD because it seemed to have the best overall publicity at the time. Right...

Yeah, the 4.5 was terrible! After I took it for the first drive and it fell on its face hard and then lurched out of the hole when the PV finally came in I hooked my vac gauge up and ran it around to the dash so I could see what the heck was going on. Made it pretty clear that my vacuum coming...

Been a couple busy days so I haven't had time to try these tweaks but today I finally got some time to play around with things. Thanks for the input, I ended up getting some great results. First, I decided to hold on to the 750DP, im not running this thing at WOT down a strip, this motor is...

S Speaking of vacuum, I’m lucky to see 11in at idle warm, is that par for the course with a cam like this?

Thank you for the replies, I’ll mess with these tomorrow and see what I can get with it. Even with a manual trans you’d prefer a Vac Secondary? I did have a Vac Secondary on this truck before and man, it was a bear to tune the transition to secondaries in with the gearing in this transmission...

Hey guys, feel free to redirect me to a better place to post this but im looking for some tuning advice with a fresh 496 build in a truck. I figure you B Body guys are a wealth of info on the subject of tuning. Build specs are down at the bottom. I have about 450 miles on this build and broke...

I’m sure they do but Dave has been terrible to deal with over this whole thing. He’s always been a jerk on the phone but I’m really disappointed in his customer service after all the money I’ve spent with them. I’ve spent over $18000 with them on this build and other projects over the past 6 or...

looks like I might be on my own here, I’m gonna have to find a shop that can do this for me. Will this kit work on the performers? Is it true that if I tap deeper on pedestals 1,3, and 5 that my studs go into water jackets on the performers? Anybody recommend any shops in northern ca that can do...

How did you find the article that was under this link? I can't seem to find it now.