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Dual predators !!!!
I'll be curious how you like those predators. I've heard they were a godsend and then I've heard they were okay if you were simply "ON or OFF"...
I have run a single predator on a stock 390 in a truck and a 429 in a jet boat. I practiced tuning on the 390. Compared to like a Holley, they are super easy to tune. No jets. Literally only two or three adjustments. I can't remember exactly now as its been some time, I'm going to have to read up on it again. But depending on the carb, you have idle speed, the spring tension on the doors to adjust how much vacuum it takes to open them ( basically high speed mixture I believe), there's a screw on top that adjusts mixture I believe, it works through the float. And there is a cam inside that you can change but it is super rare that it needs changed and I don't remember anything about it. And then for some reason one of mine has a screw on the side but I don't know what it does and nobody could tell me. They also have no vacuum ports but you can drill a hole in the side of the carb and put one in. I did to run vacuum advance and it works fine. It sounds complicated and I wish I could explain it better but right now I can't. But its really super easy, you just have to have lots of patience. For example instead of turning the mixture screw 1/4 turn, you might try 1/8 or 1/16th. They're very sensitive. But throttle response is almost instant. No hesitation, no bog, nothing. Close to fuel injection. Throttle response seemed quicker through out all rpm's, and it ran great up high. I liked it much better then the Holley on the jet boat, but mpg does go down slightly with these carbs.
There were a lot in the early days of drag racing with good results. I have heard that they were banned because they were considered a form of injection. I don't know if this is true but could explain why they didn't take off.
Before Predator, they were made by Kendig and were race only carbs that were 1250 cfm tops compared to Predators 930 cfm.
I like them a lot but I also like being different. Considering this is the first time I'm building a blown motor, I wanted to go with something simple to tune and I have had good experiences, and have also heard that these worked extremely well with blown applications not to mention you can pick one up for around $150 - 200 and make in brand new for another $100.
Besides that, this check I'm going to try and get the other two tires for my dad, so if there's enough left over then I will get the carb adapter plate but if not then it will come next check.
Thanks for your interest so far guys !!!
And good luck to you too Firebird.
Very cool setup, haven't seen many blown FEs. Whenever I see a blower on a truck it brings to mind the scene in one of the old Chuck Norris movies when the bad guys bury Chuck alive in his blown Ram Charger. He fires it up, stomps it to the floor and the truck digs itself out. I think it was in "Lone Wolf McQuade".