My dad ran 100 shot on his '64 Riviera from the mid '90's up until a few years ago. Full weight Riv ran 12.6 on the bottle and 13.7 on motor. 425, home ported heads, healthy cam, dual quads and headers. It has a switch pitch trans with 4000 high stall and Ford 9" rear with 4.11 gears with a Detroit locker. He made hundreds of passes on the spray. He ran a separate fuel system for the nitrous, which I highly recommend. He does not race it much anymore and has removed the nitrous system from the car. Ken
Andy-since you're a smart fella, the juice will be added carefully and you'll be monitoring 'things'. That said, NOT doing the previous, Nitrous use has been the 'end' of many engines. Myself, I'm thinking about the engine build with this in mind as to clearances and metalurgy. I guess I was always thinking about using quality forged pistons. (and I'm not too sure of the quality of many of the cast pistons 'out there' these days either). And boosting output with stock parts for a quickie blast is different from the duration of the 1/4 mile(or more!). I know-I'm another old f**t with the cold water bucket. Just a couple thoughts, but I guess you know where to find some replacement parts! BTW-a very clean/tidy underhood
nitrous loves old worn, loose motors. if your looking for having some reliable fun(as long as that fuel solenoid always opens) nothing like a 75-100 shot for a little more power. I wouldn't be worried about hurting a piston with that little of nitrous as long as you are monitoring spark plugs after runs and making sure you are not going lean. I would say nothing leaner that 12.5-12.8 at wot.
I'm definitely being a little conservative. I'm pretty confident I can spray the 75 shot all day long and be safe. I could probably even spray the 100 shot with no ill effects. Forged pistons would definitely be ideal though. Hopefully I won't find myself calling you looking for a new Nailhead! And thank you! That's kind of my take on it. Plugs have looked good so far so I think the tune is pretty safe.
Cedar Falls Raceway has their last race Saturday and the forecast looks like 70 and sunny! Maybe you can get some runs in yet this year. Maybe see you there.
The only way to read your plugs is to, after you spray the nitrous and at the end of your run, release the button and turn your ignition off you after you just let off your gas peddle. This will be your true spark plug reading of lean or rich.
Not sure how far you can go with a stock cast piston, I wouldn't hit it with more that 100, and you need to look at the fuel ring in the plug, like others mentioned, shut it off, keep rpm high until you can shut it off, then pull a plug, throw in a new one, drive back and adjust accordingly.Not sure on a nail head, but on the 455, #3 is the one to watch and adjust from what you see there... All "off the shelf" kits are "fat".. And who ever is selling you nitrous is makin a killing!! I'm in expensive California, and pay $5 a pound or alittle less... Have fun, Gary G.
