stroker mike
Well-Known Member
I have stock early 9.2 cr pistons in my 318, is a 150hp shot too much?
I have a holley ignition with rpm window switch. The fuel pump is a mr.gasket electric 4.5-7 psi unit. None of which matters at this moment, cause I just found cracks in my cam bearings and if I'm not mistaken that's a sign of a cracked block. I am not happy.
My concern in if my timing is at 4* btc it will be a bit sluggish off the line, not rev as hard. I want it to retard in conjunction with the nitrous, as the fuel pump kicks on. I'll have to figure that part out.
You need to pull timing, it WILL NOT be sluggish, always remember that N2o is not flamable, its just "oxygen" in a bottle, think of it as changing Altitudes from say 5000ft. too sea level, there is alot more "air molecules" at the lower Alt., you then need "less" timing & more fuel, this is basically how Nitrous works, but to much higher extreams, i play it safe anymore, i'll list the bare minimums that i run to be safe, N2o can be fun, but it will add up.
Bare safety:
Bottle heater/warmer (you NEED to maintane a propper bottle pressure to benefit)
Window switch: This allows the control of when you want the nitrous to come "on & off" in any given RPM, this is a cool device to have.
Bottle pressure gauge: a no brainer.
Dedicated fuel system: Wether its a 100 hit, or 200, it is always a good idea to do this so you can program/maintane propper flow for the plate.
Propper plugs: Its always best to drop at least 1 heat range colder, even on 100/125 shot, along with narrowing up the gap to around .032", now if you go with a higher like 150-200, i'd drop 2 heat ranges.
Propper fuel/octane: As you know, pressures in the cylinder dramadically increase, so it never hurts haveing a higher octane for the N2o.
Rev. limiter:, this is just incase something lets go in the drivetrain, you already have your "window switch" to kick off the nitrous, so it still won't be "spraying" when its on the limiter & of coarse you won't over-rev & spin a bearing.
PULL timing accordingly!!
Play it safe & nitrous "can" be your friend. My 2 cents.
some great advice your giving him joe!I will add this, back in the day (80s), i would T off & run a mech. parts house fuel pump on my 360 dart sport, ran the good old 125 power shot system, never pulled timing, no heater, no anything, just the kit, with that 125 hit (god knows what the bottle pressure was at), i dropped a solid 3/4 & 7-8 MPH on ET, i thought that was good (this was back in south fla), fast forward to my 97 6sp. Z28, i decided its time to do it right, i found a good used NX 300 hit kit for 400.00, it had everything, purge, new NX heater, blow-down tube, big noids, you name it, i ran a 100 shot to start off slow, got a window switch, max timing was 28* (4* pulled) from factory tuned setting through the computer, off the bottle it ran 13.4/13.5 @ 100/101 on 2.00 60fts. consistantly, on the bottle, after my 3rd. pass (working on the launch), it ran a 12.01 @ 115 on a 1.81 60ft., there was an 11.8 in it i'm sure, so this is why its very important to do this stuff right the 1st. time & keep everything in tune, i dropped almost 1.5 seconds & 15 MPH on just a meesely 100 shot, bottle pressure was at 950 in the lanes, had the window switch set for 3000 (on), 5600 (off), shifted at 6000 (so it wasn't always on the nitrous through the run), launched on that 12.01 pass at 2500 & it got into the nitrous early.
oh, get a purge kit too.
some great advice your giving him joe!
I will add that dynotune makes a great bottle heater for only 99 bucks, and that a purge kit is a good idea too...some like to purge through the motor, but i think its better to do it with the line...just make sure you dont put on a huge purge show so that the bottles start dropping in nitrous and pressure like crazy- thats gay lol....cold fusion makes a nice and affordable purge kit, might wanna check out before going to a NOS or NX brand solenoid (there all from the same company anyways the noids)
I picked up a used NX system for 200.00 last month from a guy close to me, it has the big noids (checked them & there good), bottle, lines & nozzle for EFI, i'm looking at a plate kit from (yeah i know) Procomp for 59.95, it has a 40 hole spray bar, bottle brackets (which i need), 8 jets, braided fuel line & fittings, i'm alittle leary because its from Procomp, but maybe its not so bad.
Thanks for the heads up on the other stuff, i'll look into it, because NX heaters are 200.00.