GSXRAntwon Posted June 28, 2012 Report Share Posted June 28, 2012 NEEDS MOAR BOOOOOOOOOOOOOOOOOOOOOOOOSSSSSTTTTTTTTTTTTT VRMMMMMMMM PSHHHHHHHHHHHHHHHHHHH Quote Link to comment Share on other sites More sharing options...
Patterson Posted June 28, 2012 Report Share Posted June 28, 2012 Hm. Throwing Brandon into the Prop should fix it too. Quote Link to comment Share on other sites More sharing options...
Sam1647545489 Posted June 29, 2012 Author Report Share Posted June 29, 2012 NEEDS MOAR BOOOOOOOOOOOOOOOOOOOOOOOOSSSSSTTTTTTTTTTTTT VRMMMMMMMM PSHHHHHHHHHHHHHHHHHHH Lettuce hook up the boost gauge tomorrow night before our manly shooting and dinner night. Quote Link to comment Share on other sites More sharing options...
Farkas Posted June 29, 2012 Report Share Posted June 29, 2012 Hesitation/Bucking is a lean condition, which is no surprise to me if this is what you're experiencing when you're starting to hit boost. I figure it probably clears up as you get into the main jets of the carbs and off the pump jets and through the progressive circuit which are probably on the lean side. If it were a rich condition the motor would just react sluggishly and even sound loaded up. Reading plugs is a good thing to learn, but I definitely suggest getting a wideband to figure out what you actually have going on. Quote Link to comment Share on other sites More sharing options...
Mattsv8 Posted June 29, 2012 Report Share Posted June 29, 2012 He said it was at cruise speed. If its lean or rich going into boost then pv. But the main circut should not control cruise rpm fuel. That's the ifr job. If its too rich at part throttle less ifr too lean more. Your main air bleeds should be set to slow the mains t not come in on cruise conditions. And I've went 8s on a carb for a few yrs. Built a homemade e85 carb id think my opinions should help. But fuck What Do I Know. Quote Link to comment Share on other sites More sharing options...
Farkas Posted June 29, 2012 Report Share Posted June 29, 2012 (edited) He said it was at cruise speed. If its lean or rich going into boost then pv. But the main circut should not control cruise rpm fuel. That's the ifr job. If its too rich at part throttle less ifr too lean more. Your main air bleeds should be set to slow the mains t not come in on cruise conditions. And I've went 8s on a carb for a few yrs. Built a homemade e85 carb id think my opinions should help. But fuck What Do I Know. Going 8s on carbs is different than setting up carbs that are going to be used for spirited cruising, I'm sure. You're getting pretty defensive about your answers, when nobody has said you're wrong in any way... we're just suggesting other things to consider. Cruising is done on the main circuit, airs richen or lean the mains in the uppermost RPMs. Emulsion tubes and etc. will determine the richness on the main tubes at cruise as well as the choke size. To me his problem sounds like the changeover from the progressive circuit and main circuit has a lean spot. Obviously he's not cruising at the same RPM and then it suddenly bogs out and then goes back to normal. It's probably experienced when he's speeding UP TO a cruise speed, which he would go through the changeover in circuits. If the jetting was fine previously, and you're experiencing this condition randomly, I would definitely check the plugs and maybe even the fuel pressure. Bowl floats could be getting stuck and not filling the bowls correctly, as well. http://www.tr3a.info/TR.images/DCOEchart.jpg Edited June 29, 2012 by Farkas Quote Link to comment Share on other sites More sharing options...
Mattsv8 Posted June 29, 2012 Report Share Posted June 29, 2012 is it a holley 4150. If so it has 2 circuts. The only holley carb with 3 circuts are dominators to overcome the large butterfly. And some 1050s have 2 as well. The progresive circut ur refering to on a 4150 is in fact the idle feed restrictor. This can set cruise rpm all the way up to about 3000rpm. From there its the mains. Most if not all holleys come with the mains comming in way to early. And too large a ifr so too rich at cruise. My suggestion for accel pump is cause most blown cars go lean if u stab it untilll the powervalves open. I had a 6_71 blown 355 with 11.78:1 compresson. I know whatv blowers like his is dinky but I've tuned a few of them. Mine loved a big as shot on all 4 squirters but it only spun to 7800rpm. Proably was off on the tune some cause that was all tuned by ear and vac gauge. With a wideband I proably was a litte fat wot. Quote Link to comment Share on other sites More sharing options...
Mattsv8 Posted June 29, 2012 Report Share Posted June 29, 2012 Id get a innovate lm1 and auxbox recorf rpm afr egt boost and log it then make small changes. U can proably do a clamp on the hedder style if u didn't wana weld in a bung Quote Link to comment Share on other sites More sharing options...
NHRATA Posted June 29, 2012 Report Share Posted June 29, 2012 Id get a innovate lm1 and auxbox recorf rpm afr egt boost and log it then make small changes. U can proably do a clamp on the hedder style if u didn't wana weld in a bung I don't think the O2 would work with the water that come out the exhaust . Quote Link to comment Share on other sites More sharing options...
Mattsv8 Posted June 29, 2012 Report Share Posted June 29, 2012 Some don't have the water I believe but I'm not shure on that not a boat guy Quote Link to comment Share on other sites More sharing options...
Sam1647545489 Posted July 2, 2012 Author Report Share Posted July 2, 2012 Welp it ended up being 1 plug that I closed the gap to tight without opening it up when I was gapping them. Had it almost 100% closed. I regapped all them to .35 and now she runs great. Quote Link to comment Share on other sites More sharing options...
GSXRAntwon Posted July 2, 2012 Report Share Posted July 2, 2012 Welp it ended up being 1 plug that I closed the gap to tight without opening it up when I was gapping them. Had it almost 100% closed. I regapped all them to .35 and now she runs great. Idiot. Thats the last time I take your course on Carb Tuning and Engine 101 Quote Link to comment Share on other sites More sharing options...
Sam1647545489 Posted July 3, 2012 Author Report Share Posted July 3, 2012 Idiot. Thats the last time I take your course on Carb Tuning and Engine 101 Im a bauce at timing distributors :fuckyeah: Quote Link to comment Share on other sites More sharing options...
rl Posted July 3, 2012 Report Share Posted July 3, 2012 Welp it ended up being 1 plug that I closed the gap to tight without opening it up when I was gapping them. Had it almost 100% closed. I regapped all them to .35 and now she runs great. Do you remember setting it that low? Pre-ignition will close a plug in a hurry. Quote Link to comment Share on other sites More sharing options...
Sam1647545489 Posted July 3, 2012 Author Report Share Posted July 3, 2012 Do you remember setting it that low? Pre-ignition will close a plug in a hurry. Sure hope not. I remember closing them all really tight then I would gap them as I installed them. I figured I missed one. I am hoping that is what it is... Quote Link to comment Share on other sites More sharing options...
Sam1647545489 Posted July 8, 2012 Author Report Share Posted July 8, 2012 Just a update, boat has been running good since I changed the plugs and ditched the power valve on the carb. Faster then Anthonys with less prop. Now time to up the boost to 8# and alot more prop. Quote Link to comment Share on other sites More sharing options...
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