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Bogging off the launch

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Old Dec 18, 2010 | 07:08 AM
  #41  
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Originally Posted by ZONES89RS
Acc pump has nothing to do with it launching off the 2 step, the pedal is to the floor.
true, sorry, I foot brake. Power valves rating?
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Old Dec 18, 2010 | 07:15 AM
  #42  
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I have run both a manual tranny and automatic and in both cases I have run much slower times when I spun off the line. 3500 plus runs. Your 60' is one of the most important times in the 1/4 mile.
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Old Dec 23, 2010 | 08:35 AM
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I went 1.56 60ft in a 457rwhp Cobra on 26" ET Streets. Suspension and for the most part the whole car is stock. I launched at roughly 6200 and dumped the stock clutch against the stock aluminum flywheel. I think what made it launch so well is that the stock clutch slipped just perfectly and it didn't bog too hard. It can be done, just takes time. Good luck with the man pedal.
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Old Dec 23, 2010 | 11:29 AM
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Doesn't someone make a adjustable launch control that ties in to hydraulic slave cylinders and works off the two step button?? You could introduce some slip that way also. You could try running a really tall gear also. You have plenty of OD with that trans. Do yourself a favor use holley parts from now on. You don't want to have to deal with a cheap float sinking on you.
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Old Dec 24, 2010 | 01:15 AM
  #45  
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So far the car is running good and the float is a solid neoprene piece, so it shouldnt be possible for it to sink.

Otherwise, the car should be at the track beginning of next year to see if the bog is gone, i bet it is, now that it will have fuel on the launch.
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Old Dec 24, 2010 | 11:51 AM
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I hope for your sake it is but I don't usually see jet extensions beeing a problem unless the car is putting the front end 3' in the air or better. but you never know.
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Old Dec 24, 2010 | 05:59 PM
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It will happen with the dive line shock i am getting, a trans break or spraying a decent shot on a motor that is making power with just a stalled auto, not to mention, my rear floats were not that high, now it is up where it should be. If it still bogs at least it wont on nitrous, LOL.
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Old Dec 24, 2010 | 09:27 PM
  #48  
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Originally Posted by ZONES89RS
It will happen with the dive line shock i am getting, a trans break or spraying a decent shot on a motor that is making power with just a stalled auto, not to mention, my rear floats were not that high, now it is up where it should be. If it still bogs at least it wont on nitrous, LOL.
if it does bog have someone ready to catch your carb when it comes back down and pick up the parts of the hood too
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Old Dec 25, 2010 | 03:10 AM
  #49  
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Why is that, assuming you mean a backfire...
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Old Dec 25, 2010 | 06:19 AM
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Originally Posted by brngrhd
if it does bog have someone ready to catch your carb when it comes back down and pick up the parts of the hood too
I don't think I would juicing anything that was not absolutely spot on. Little tuning problems tend to turn into big drama when the squeeze is on.
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Old Dec 25, 2010 | 09:21 AM
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Originally Posted by speedtigger
I don't think I would juicing anything that was not absolutely spot on. Little tuning problems tend to turn into big drama when the squeeze is on.
^^Dito. If it's not happy on motor and then you're spraying it things might get really intersting.
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Old Dec 25, 2010 | 10:14 AM
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^^^this is what im talking about i have seen many many guys who really know nitrous (not saying you don't) blow stuff apart because of bogs on the line. one guy went to a bigger, better tire and did not change his 2 step....... oops he was a class racer and had his car dial in well with the tire change and the bog it backfired and blew his intake apart. is was a 5.0 stang where they have that plate on the side of them



that thing blew off killed his hood they never found the plate......

just saying.......
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Old Dec 25, 2010 | 11:53 AM
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Must have snatched the engine completely out of cam range. I don't see how that could have happened without the throttle blades being shut. How can the pressure get that high with a 75 or 80mm hole in the plenum being kept wide open. I seen a car get covered in flames from a nitrous backfire this past Thursday and the guy let off the spray and kept the throttle open and it sucked the flame up and kept right on running.
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Old Dec 25, 2010 | 12:33 PM
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I have never seen a carb car have an issue with back like blowing the carb off, but mustangs? Yea, i have had a buddy blow a sheet metal intake apart, when we had it repaired, we didnt grind the welds down the next time so it wouldnt happen as bad.

LS1 EFI cars, seen them blow the intake off as well, put a couple dimples in the hood, LOL.
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Old Dec 25, 2010 | 12:41 PM
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I have never seen a carb blow off, but I did see a carb and part of the intake manifold melted down into the valley of the motor. When that Vette blew the hood went at least 15 feet into the air.
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Old Dec 25, 2010 | 06:53 PM
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At work I've many throttle blades tacoed and a few main bodies melted like crazy!!
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Old Dec 25, 2010 | 07:24 PM
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Melted main body? What the hell happen, catch on fire?
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Old Dec 25, 2010 | 08:11 PM
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Originally Posted by ZONES89RS
Melted main body? What the hell happen, catch on fire?
On the car that I saw, the owner assumed the that nitrous solenoid must have stuck open. The carburetor and the better half of the intake manifold had completely melted down into the valley of the motor. There was an insane column of fire shooting straight up out of the engine compartment after the hood blew off. The guy had a picture of it in his office on the wall.
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Old Dec 26, 2010 | 06:58 AM
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Sounds like both solenoids stuck open dues to a faulty activation switch.
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Old Dec 27, 2010 | 12:47 PM
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when you going back to the track ZONE?
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