Ramsey Posted July 25, 2006 Report Share Posted July 25, 2006 I have a 98 trans am A4, and I am looking to put on a 100 shot. I have the bottle, 16' line, 1 24" line (soon to have 2), wet nozzle, nitrous solenoid (soon to have the fuel also), also soon to have the throttle switch and I am pretty sure that is all that I will need. But, i have heard of a few people on this board that blew their motor because the 8th cylinder was being starved of fuel and they were thinking of running some type of duel rail & duel return system. Is that true? Should I look into running something like that? If so, does anybody have info on what i will need? The last thing i want to do is blow my motor if there is a way that I could prevent it. Quote Link to comment Share on other sites More sharing options...
Guest Removed Posted July 25, 2006 Report Share Posted July 25, 2006 pull the valve out of the test port, hook your fuel line up.. change your Fuel filter, and i highly recommend a stronger fuel pump!! 100 shot should be ok, unless its a return less fuel system, I cant remember Quote Link to comment Share on other sites More sharing options...
99ta Posted July 25, 2006 Report Share Posted July 25, 2006 The last thing i want to do is blow my motor if there is a way that I could prevent it. lol.....You could start by not spraying it! Quote Link to comment Share on other sites More sharing options...
Nate1647545505 Posted July 25, 2006 Report Share Posted July 25, 2006 I have a 98 trans am A4, and I am looking to put on a 100 shot. I have the bottle, 16' line, 1 24" line (soon to have 2), wet nozzle, nitrous solenoid (soon to have the fuel also), also soon to have the throttle switch and I am pretty sure that is all that I will need. But, i have heard of a few people on this board that blew their motor because the 8th cylinder was being starved of fuel and they were thinking of running some type of duel rail & duel return system. Is that true? Should I look into running something like that? If so, does anybody have info on what i will need? The last thing i want to do is blow my motor if there is a way that I could prevent it. Hobbs Fuel Pressure switch on the fuel line, RPM window switch on the main circuit loop. Quote Link to comment Share on other sites More sharing options...
I Eat Rice Posted July 25, 2006 Report Share Posted July 25, 2006 Hobbs Fuel Pressure switch on the fuel line, RPM window switch on the main circuit loop. +1 Quote Link to comment Share on other sites More sharing options...
Mattsv8 Posted July 26, 2006 Report Share Posted July 26, 2006 spray it with 250. then build a real motor Quote Link to comment Share on other sites More sharing options...
MrMeanGreen Posted July 26, 2006 Report Share Posted July 26, 2006 The engine will hold it just fine. Your transmission won't, as you'll EASILY make past the 450rwtq that will break it into pieces. If this is your daily driver, or if you cannot afford to have it rebuilt first or afterwards, don't do it. If you wanna spray it, though, your engine will survive. Run a wet kit, unless you have the money for bigger injectors, a tune, and a bigger fuel pump. Then go dry. Also 100% make sure you run a fuel pressure safety switch, RPM activiated switch (not window, you have an auto), WOT switch, and blow-down tube with pressure seal (track legal and prevents too much pressure from blowing your bottle up and/or venting the nitrous into the car). Quote Link to comment Share on other sites More sharing options...
Ramsey Posted July 26, 2006 Author Report Share Posted July 26, 2006 Thank you all, for all of this info. This is a daily driver, so I might have some nitrous parts for sale. Tho i do have a 10,000 mile jasper trans with a 75,000 warranty. Quote Link to comment Share on other sites More sharing options...
Nate1647545505 Posted July 27, 2006 Report Share Posted July 27, 2006 The engine will hold it just fine. Your transmission won't, as you'll EASILY make past the 450rwtq that will break it into pieces. If this is your daily driver, or if you cannot afford to have it rebuilt first or afterwards, don't do it. If you wanna spray it, though, your engine will survive. Run a wet kit, unless you have the money for bigger injectors, a tune, and a bigger fuel pump. Then go dry. Also 100% make sure you run a fuel pressure safety switch, RPM activiated switch not required(not window, you have an auto), WOT switch, and blow-down tube with pressure seal (track legal and prevents too much pressure from blowing your bottle up and/or venting the nitrous into the car). Manual or auto, both can trip fuel cut. If the tires start spinning (instant torque in seconds - which nitrous is great at) and the desired MPH isn't obtained....you'll bounce off the rev limiter and more than likely hit fuel cut. Quote Link to comment Share on other sites More sharing options...
MrMeanGreen Posted July 27, 2006 Report Share Posted July 27, 2006 LS1s don't do fuel cut for the rev-limiter, they drop the spark to the firing cylinders EDIT: I just read my first post. I meant RPM activated switch required, window switch not required. Nate = 3800s Me = LSx Quote Link to comment Share on other sites More sharing options...
Billiumss Posted July 27, 2006 Report Share Posted July 27, 2006 LS1s don't do fuel cut for the rev-limiter, they drop the spark to the firing cylinders I thought the same awhile ago, but it's not true. When you hit the rev limiter you can see your Injector pulse go down and a lean spike on a WB 02, hence less fuel. I saw this recently on my car. As for timing, I'll have to go back and check my logs to see if it gets reduced. Quote Link to comment Share on other sites More sharing options...
MrMeanGreen Posted July 27, 2006 Report Share Posted July 27, 2006 The '98s do spark-cut according to the gurus at LS1Tech. I'd look into it more. Quote Link to comment Share on other sites More sharing options...
Nate1647545505 Posted July 27, 2006 Report Share Posted July 27, 2006 http://midnightoilfabrication.com/lol/fueling.JPG You'll notice there are no governing parameters of the spark in regards to a cutoff. It's only fuel. This is from a 98 A4 Caramo/Firebird. Another thing that's interesting is that the A4 can get sloppy when it's abused. I rode around with a buddy from GMR Speed and after a few hard launches and WOT pulls, the car was shifting near 6,300-400, when commanded MPHs and RPMs were obtained by 5,800. You've probably seen more stuff like that than I. Quote Link to comment Share on other sites More sharing options...
Nate1647545505 Posted July 27, 2006 Report Share Posted July 27, 2006 The '98s do spark-cut according to the gurus at LS1Tech. I'd look into it more. This is interesting because I've opened up the file with EFILive, LS1Edit, HPT and none of them had any editable parameter regarding a maximum spark RPM. The dwell times on the coils are all staticly defined so it's not cutting it by means of coils.... I'd still reccomend a window switch, but that's just me. Quote Link to comment Share on other sites More sharing options...
MrMeanGreen Posted July 27, 2006 Report Share Posted July 27, 2006 My car is commanded to shift at 6500 so that it shifts actually at 6800. I dunno, I've been steered wrong by the people on LS1Tech before, so maybe another lesson learned. Quote Link to comment Share on other sites More sharing options...
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