mrr23

iTrader: (3)

Almost a year later, I'm finally back at the track. Car has been through a couple of changes. Here's the run down. SLP airlid, K/N filter, ASP under drive pulley w/overdrive alternator, no cats, Bassani tru-dual exhaust, Yank PY3400E, stock PCM tune, two stage n2o (75/150), FJO dual stage window switch, 3.73 gears, and M/T 26 x 10.50-16 ET Streets. Still can't break a 12 second pass on motor. Burned up #7 plug on the nitrous. The first nitrous pass was leaving on the 75 and having the 150 come on at 3500 RPMS. Blew off the tires and went 11.51 @ 119. The next pass, I set the 150 to come on at 3000 RPMS and after that, I turned the 75 on. also, richened both stages up. 75 by two sizes and the 150 by one size. Went 11.444 @ 119.85.

Best NA - 13.245 @ 104.96 75/150 N2O - 11.444 @ 119.85 Made 4 runs.

mrr23

iTrader: (3)

oh, and waiting for the 150 to come on at 3000 rpms sucks. was going to try 2600 rpms, but it started raining. good thing though.

CAT3

iTrader: (9)

Why you gotta wait, are you launching under 3k? Hell, when I had the small Yank 3k stall I launched and nitrous was right there with me. I would have so stage one is normal WOT ( you go WOT after you gently roll into the throttle, or right from the line, your choice) and then stage two at 3500-4000rpms

mrr23

iTrader: (3)

yep, launching under 3k. i've tried idle and foot braking until the tires almost let loose. i get the same 60ft either way.

that's how i did the first run. i foot braked it to about 2200 rpms, then floored it. the 75 came on as soon as i went WOT. tires spun. let out, then back into it and ran the 11.51 @ 119. the 150 came on at 3500 rpms.

so, i did it in reverse. i sat at idle, had the 150 come on at 3000 rpms. as soon as it came on, i didn't spin, so i turned on the 75 and got the 11.444 @ 119.85. was going to try turning on the 150 at 2600 rpms but it started to rain.

i'll be trying some different things next time out. wire the 75 into the FJO and have it come on at 1800 and then 2600 for the 150. but, i have to figure out why i burnt #7 plug first.

Beaflag VonRathburg

iTrader: (176)

Those are some really good numbers for just a few bolt ons and some juice. Good job.

Firechikn

iTrader: (15)

need some full slicks. get the 60' down, and bust a 10 sec.

TRYTHSS

iTrader: (2)

with a stall, slicks and nitrous, you should be getting better than 1.80 60', i spray out of the whole to a 1.67 60', with no after market stall.

mrr23

iTrader: (3)

you would think. i've accepted the fact that the two slowest LS1 cars on the planet, i bought. i've done a 1.709 with the 4.10 gears on nittos. only two runs with this set up. give me about two more weeks. oh and a better prepped track.

Nasty Hawk

I blew my posi unit to pieces on my first pass with my 2-stage. It actually blew off the line with Nitto DR's. I launched at 2,500. Did take it into 2nd till about 4-4,500 rpm and had 2 let off. Coasted thru the line with 12.4@90 with a 2.08 60". Think i would have saw a low 11??

NXRICKY

iTrader: (1)

Why did you richen up the systems?
Ricky

mrr23

iTrader: (3)

because back on the dyno day, the original jet sizing showed somewhat lean. so, i jetted it up then to see what would happen. lost some torque and held at 12:1. so, at hte track, i wanted to see what would happen with the original jetting. after that pass, it started to run a tiny bit rough. so, i richened it up. ran even more rough after that pass. gave up because it started to rain. glad it did. pics up shortly of the plugs.

oh, and i was using the SHO nozzle on the 150 shot and the shark nozzle for the 75.

mrr23

iTrader: (3)

here's the tale of a plug.

in order. left side 2,4,6,8 bottom to top right side 1,3,5,7 bottom to top


number seven


number six

sleeperstyle

iTrader: (4)

i think that car can do better with that much juice going through it- ditch the k@n and clean the maf first off (not saying you are a newbie by any means but i've had results from cleaning the maf- my car actually gained .1 on motor). Q D contact cleaner is all you need.

if you have to "wait" till 3000rpms spraying the 75 out of the hole also i'd say get a bigger stall. i "wait" about .5 seconds or less spraying at 3900 with a 3800 stall, so if you are spraying below the stall speed i don't see how it wouldn't be an instant hit..

do you have headers?

mrr23

iTrader: (3)

my car is weird.

i welcome your input, and will consider looking into it.

ok i'll break this down a little more into detail.

pass #1
held rpms to 2200. as soon as the lights came down, i mashed the pedal which instantly activated the 75 shot. doing this netted me tire spin. let off, then went WOT again. 150 shot comes on at 3500 rpms. traction held. went 11.51 @ 119 with a 1.81 60ft both stages on at same time.

pass #2
car idling slightly rough, i richened up the stages a little. decided to reverse the procedure as the tires spun the first time. set the 150 to come on at 3000 rpms. this time sat at idle. when the lights came down, i mashed the pedal to WOT. no spin. 'waited' for the 3000 rpms activation of the 150 shot. when it finally did, the tires held, so i flipped on the 75 shot. netted me 11.444 @ 119.85 with a 1.802 60ft. with a better prepped track, i can improve on the launching along with earlier activation of the 150. those two things will get me closer to my realistic goal of 11.3x and closer to my optimistic goal of a 10 second pass on a stock motor from TB to exhaust manifolds.

unfortunately, you can see by the plugs, i have some distribution issues right now.

sleeperstyle

iTrader: (4)

get some headers and knock a little timing out, probably 10's then.

mrr23

iTrader: (3)

that's the easy way. i'm a difficult person.

CAT3

iTrader: (9)

Dont change your WS under 3k. Not worth, besides even a stock converter will go up to 3k quick enough. Under 3k your adding too much cyl press. and will hurt more than do any good. Stick the 150 off the line, it may spin some hoepfully your running good DR's/Street or Drags... Keep in mind if you Let off and get back on it like that with wet kit, you can backfire.

mrr23

iTrader: (3)

search for my name about using nitrous under 3000 rpms. that little 'safe rule' don't fly with me. we've had plenty of conversations about that idea. i've been hitting 150 ish as low as 1800 rpms back when i had a stock converter. i didn't go 11s on stock car without drag radials by waiting for 3000 rpms.

cantdrv65

iTrader: (3)

You were definitely lean to burn up the plugs like that....Also on a 225 shot Id go one step colder to a TR7....

mrr23

iTrader: (3)

yeah i was. i now have autolite 103 which is the equivalent of the NGK BP7EFS plug. i'm also going to put the fuel jets i had from the very last dyno run. then we'll see what happens.