Larry,
I can't give you any technical "insights" into what Barry does with his systems and pumps. I know that my pump delivers incredible power/torque all the way from about 1800 -- 3400 rpms; it'll actually spin up to 3650 before the governor kicks in... It's a 7500 pound truck that'll do better than 90 mph in the quarter mile.
I'm self-conscious about thumping my chest like a prized jerk, but this truck is really awesome, and Dr. Performance deserves some positive recognition (okay, ALL the recognition). Barry has taken a lot of flack from "unbelievers" on these boards who are more than just a little skeptical about what he's doing. A lot of the folks who are doing the stone-throwing have a "vested interest" in selling cam plates and promoting less expensive alternatives to producing power -- so they bash the **** out of him and his products, calling him a charlatan, and worse. I've never understood this, particularly, since his trucks have been reviewed, several times, favorably in the TDR and other publications...
My feeling is that there ought to be plenty of room in the "arena" for both the folks who want to "bomb" their trucks, and have fun for a lot less money; they are the "torque plate" aficionados; I say "more power to 'em!" Mark C. is a really good guy, and he's making low priced bombing affordable to a lot of good folks. I take my hat of to him for an honest job, well done -- and for making a lot of people happy in the process... But, that doesn't mean that Doc isn't doing a great job, too; he's just taking a different path (a cooler one!) to the top of the hill...
What bothers me, though, is the hostility that is consistently directed at "Doc. " It comes across like pettiness and jealousy to some of us. He's providing a worthwhile product, too, in my opinion -- and he's not really competing with the cam plate crowd, because his systems are in a whole different price category, and he makes no bones about it.
My temperature probe is in the "elbow," after the turbo. It has only hit 850 degrees one time, and that was trailering a pretty heavy load, heading (up I-75) over the mountains in Tennessee, running straight up a long, steep, grade and making over 40 pounds of boost most of the way to the top... This truck hardly smokes at all -- not much more than factory. It's burning the fuel delivered to the cyliders -- not blowing it out the exhaust!
A couple of Saturdays ago (a day that "shall live in infamy") I was driving with my wife on the way to Highlands, N. C. , and a guy in a beautiful, new, bright red, 24 valve 3500 blew our doors off. We were going 80 and he went by us like we were backing up. I've never seen so much smoke, though. I seriously thought he'd blown his engine. We were on a straight stretch of the "Gainsville connector" where the speed limit is 70 (and could be 90!) and I floored it to catch up with him. We went by him with the speedometer pegged and my wife yelling in my ear to slow down. I thought my heart was going to explode in my throat. He got off in Gainsville and I reset my "Magellan" (GPS) unit; it said our top speed over that not quite 3 mile stretch was 127 mph. I'll never do THAT again. My wife didn't speak to me for most of the rest of the day. (but, talk about FUN!)
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Barry isn't sharing his "secrets" with anyone. One of his mechanics, Everett Smith, (Smith Diesel, Carlisle, KY) is a close friend and he's told me, straight up, that he has no idea what makes these pumps so hot (and so "cool-running"). Personally, I don't give a rat's nasty. I can't tell you how my cell phone can be tracked, via satellite, anywhere in the world, either... I just know it works.
I've never heard of anyone who's bought a pump from Barry, or dealt with one of his installers, who has had a complaint -- at least one that hasn't been resolved, satisfactorily. I live in Atlanta, and I would be more than happy to answer any emails from anyone interested in test driving this truck, or getting in touch with Everett. He's much better qualified to answer specific questions than I am. I just want to see Barry (Dr. Performance) get a fair shake on these boards, that's all.
Attention: TDR Forum Junkies 
