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Hey guys, i am new to all this mod stuff and have a few questions for u pros. What is the biggest dry shot that I can run in a stock motor? I am hoping to run at the track a few times a year. Any video links would be great. Thanks again..Maz..
Are we talking bone stock? How much experience with nitrous, this can play a role going big for certain. Anyway, with a spot on tune, and a fuel system that can support 600+ hp, 200/250rwhp is very doable. Now with that said, going to these levels we have to have a very good understanding of all parameters involved in spraying.
Here is a quote of mine from another thread. Info contained within can give much insight into how far, and what's needed to push a stock motor to it's limits. The limit for me was higher than these numbers, but this will give you a good feeling to what's needed.
I have been working on a new dry kit which the title state's the name. This kit is based upon the NX Lightning Stage 6 noids and CF ss dry nozzles. At this time no pics, but they will be coming soon. Now the nuts and bolts of it all. First we need to lay the ground work. This testing is done on an absolutely bone stock long block LS6 (mine), not even headers. The fuel system is upgraded (will list mods later in thread) and a Vararam CAI along with tuning are the only mods. This has been put into a dual stage configuration. 1st stage is/was jetted at 170rwhp and 2nd stage was/is jetted for 65rwhp (3rd stage wet was not used in this test, as that is for later) . We had a dyno day yesterday with a couple car clubs involved so there was many witnesses. We made 3 pulls and all were to 6500rpm red-line. There was absolutely no lean spike, none, nodda, zilch, zero. So, that is good news to all. The first pull was just a tester and came on way late, but a/f was safe and no knock retard, no dropping fuel pressure and no lean spikes. So I set WS for 3200rpm on and 6400rpm off on stage 1, then stage 2 was set at 4400rpm on and same rpm off. Second pull was 547rwhp and 607 torque, actual. This pull was running pretty rich below 10 in a small area. So we leaned it out a bit and made a last pull for the day 550rwhp and 636 torque. Now there was still a bunch of power left on the table. When the 2nd stage comes on it was still all in the 10 to 10.8 area after 4400rpm. Well, this is good news as my base hp is about 340rwhp and we had a gain of 210rwhp on a jetted 235rwhp hit, so there is more (will be going safely for 600rwhp soon).
Just a note here, a buddy's C5 cam and head full bolt on car with a n/a hp of 404rwhp running a competitor's plate system jetted at 200rwhp fell short of our torque mark by about 58 points. What is really remarkable, is that my torque is based on the 1st stage only of 170rwhp jetting, the second was set way latter and helped pick the dropping torque back up. Now who wants to still state that dry hits are lesser than wet hits? I would be willing to put this kit up against any wet kit, win/loose or draw.
OK here is my set-up/mods for this day:
104 Trick unleaded, (about 90%)
TR6 gapped at .035
Timing at 24* (none pulled ever)
Racetronics (Walbro) fuel pump
SVO 42lb injectors (used from a Ford lightning)
'97/98 Vette return and regulator at the rails
Custom tuning by myself that anyone can do (HP Tuner and LM1 WB)
Jetted for 235rwhp in dual stage running 4-nozzles (each stg dual nozzle)
Sorry about the rambling post, but I am really excited about this kit. A dry kit that doesn't run lean and produces power/torque that's on par or better than any wet kit. On top of that it's got the inherent safety that only a dry hit can supply. Nay sayer's input welcome.
Here is the dyno run from the third pull. I have a better printout of a/f if anyone wants to see it (states a/f ratio at each rpm by the 100s). Just look at when the nitrous comes on at 3200rpm, it starts going richer instantly. ( this run was all the way to 6500rpm but the dyno messed up so it only printed to 5400rpm)
Hope this gets you started on your quest for power. The key to having a stock motor survive the big shots, is to keep the low rpm torque in check. Do a search over at ls1tech (n2o section)using my online name and you'll find more info on pushing the stock ls6 than you probably want.