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Old 12-08-2015, 01:45 PM   #1
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300 hp nitrous shot

Would a stock bottom l99 be able to handle a 300 or 250 shot
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Old 12-08-2015, 02:42 PM   #2
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Lots of people have put 800+whp on the stock bottom end so I don't see why not. The key with a nitrous shot that big on stock internals is the tune MUST be spot on. It has to be perfect. Also of extreme importance is proper fueling (standalone system with race gas). Basically just need to make sure all of the components can reliably handle that spraying that much and that your tune is spot on.
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Old 12-08-2015, 03:29 PM   #3
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Like Joseph1LE said, there are a lot of people running around here pushing 800WHP, just remember your transmission is the weak link, not the engine. I cant remember what the magic number for an auto is, but its not as much as a M6.
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Old 12-08-2015, 03:50 PM   #4
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If you do it progressive I don't see why not. The instant hit at mid range with 300+hp of n2o sounds like a bent rod waiting to happen, but if it was setup to ramp in I think it would be fine.
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Old 12-08-2015, 03:58 PM   #5
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Yeah forgot to mention it would be best to use a progressive controller^
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Old 12-08-2015, 04:07 PM   #6
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Well I personally wouldn't run more than a 150 shot on a stock bottom end ESPECIALLY if you were not going to run a progressive controller. The instantaneous pressure that the engine sees with nitrous hits is very hard on the piston rings as opposed to running the same amount of power with a SC or Turbo. Also any sustained high speed runs using nitrous is problematic.

There is more of a tendancy to lift the heads off the short block due again to the instantaneous increase in pressure and combustion temperatures that is a by product of using the JUICE.
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Old 12-08-2015, 05:17 PM   #7
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I can only imagine how quickly you would be out of bottle with a 300 shot. What....a full bottle every 1/2mi of racing total?

Then what rear end is going to hold that if it isn't progressive. 300hp extra sure, but you would probably be looking at at least 350lb ft of torque on top of that. Id be just as worried about the drivetrain handling it.

A shot that big would be glorious though!
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Old 12-08-2015, 06:24 PM   #8
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It would be about a bottle every 1/4 mile pass. Would still be some left after that but not enough to make another good pass so it's pretty much one run per bottle. Which would get extremely expensive, thats the main reason I'll go with boost before ever going to a huge nitrous shot. 200 is the max I'll ever do.

I'd imagine the OP is well aware that his drivetrain will need to be upgraded. He specifically asked about the bottom end. Though some head studs should definitely be on his list as well. I'd have no concerns running a progressive 250 shot regularly with the proper supporting components (head studs, fuel system, drivetrain upgrades, ect.). And from there I'd feel comfortable pilling it for a 300 every now and then if ever needed to get the edge on someone but would stay at 250 most of the time.
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Old 12-08-2015, 06:32 PM   #9
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There is a reason big spray people run 2 or 15lb bottles in parallel.
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Old 12-09-2015, 01:03 AM   #10
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Thanks guys yes I plan on using a progressive controller and a standalone running 116 fuel
Also Im probably just going to run a 250 but be able to run 300 if needed
Auto can take about 650 the rear I dont know but that will be upgraded as it breaks
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Old 12-09-2015, 03:14 PM   #11
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Stock ring gap won't support that big of a shot for very long....... i wouldn't think so that is
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Old 12-09-2015, 03:59 PM   #12
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I personally know someone that has ran more than 300 on stock block..... it will last a little while he ended up burning up the rings
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Old 12-09-2015, 04:41 PM   #13
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I would do 250 and call it a day if you care about blowing the engine. If you don't mind rebuilding or buying a new engine then start with a 250 and keep upping the shot until it pops lol.
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Old 12-13-2015, 10:40 AM   #14
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I think I can live with 250 tuner said fuel pump wont support it so Im probably going to do a stand alone
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