Cmr0z28

First off, will my NX GM EFI kit handle more than 150? (175-200)
I'm looking to spray 75 in 1st, then another 100-125 on top of it w/a progressive controller. Am I stuck with 150 before I need to upgrade my solenoids and N2O/fuel lines?

Insight is welcome.....thanks.

Joe Brodman

I personally wouldn't spray more than 150 for the sake of your stock shortblock.

I might try bumping up to 175 this year, but only w/ running straight race gas. Just gotta toss in bigger jets.

You could also run a dual stage vs. a progressive controller (which are harder on the solenoids).

Cmr0z28

Thanks for the reply Joe....I'll stick with 150.

If I'm sending out the solenoids to be refreshed annually, will the progressive controller still not be recommended?

84 monte SS

Progressive controllers put a pounding on solenoids. Call NX and ask them if your particular noids are up to it.

Joe Brodman

If you are going w/ a single stage, ESPECIALLY w/ an auto, there is no real reason to have a progressive controller/dual stage. Set the car up to come out of the hole on the spray. I spray mine straight out of the hole; can get a little interesting w/ the 6-speed, but seems to be working for me.

Cmr0z28

Yeah but....you have a 12-bolt

When I get my Racetronix pump in, I'll test 150 in the top of 1st and see how it does. Might have to replace these Nitto's with MT ET Drag Radials and knock on wood

PS - What fuel pump are you running?

Joe Brodman

As long as you are internally stock and running a wet kit w/ stock fuel pressure, and your fuel pump is functioning normally, your stocker is fine. I ran many bottles through my motor when it was internally stock w/ a bone stock fuel system.

When I added the ported heads and cam, nitrous along w/ it was well above what the stock pump could take. Tossed in a Walboro 255 pump, good to go. I would have bought a Racetronix pump, but honestly, as long as you aren't pushing the limits of what the pump is capable of, doesn't it really matter if you are only getting 90% of its benefit, as long as it is more fuel than you need. When I start pushing the limits more, I'll go and buy one of their harnesses.

I have a buddy w/ a built 4L60E, slightly modded 10-bolt, that has pulled a best of 10.9x @ 126.x w/ it on BFG DR's. Mind you this is a supercharged LS1 car, but the 10 bolt can take some abuse w/ an auto.

Derrick Redd

I totally agree on that. Joe what was your buds 60fts.? I've been running a NX 175 shot for the last 2 years with no issues on the stock shortblock. 255 lph intank and tuning.

Cmr0z28

Derrick, are you running 175 with the NX stage 1 kit solenoids? and just upgraded lines from the solenoids to the nozzle?

Joe Brodman

Buddies 60' is in the lower 1.6x range. This was at my car club's Norwalk day. We rent Norwalk raceway twice a year. If you aren't familiar with Norwalk, it is one of the best tracks in the country, and the prep is VERY good. I've yet to run there, but hopefully this fall w/ better gearing and finally gettting to play on a sticky track, I may actually get to lift a tire.

Derrick Redd

Cmr0z28

Thanks...any idea what the limit is on these solenoids? I should probably just call NX.

Derrick Redd

Buddy of mine was running a 200 shot with the same kit with no apparent issues. I'd say it was pushing it. He did have the upgraded noid to nozzle line also.

Loadre

Noids are good up to 250. You need an SHO hose (-4 line with -3 fittings) to run a 200 shot though.

Slayn

I've been running 73/41 jets for a little over a year on a iceman solenoid with 3an lines to a shark nozzle, I'm debating whether or not to move up to 78/44 but everyone that has talked to NX says to upgrade to 4an lines to the nozzle...

I'm not calling BS or anything... but how can a 4an hose with 3an fittings/adapters flow more? It seems to me the 3an fitting would still be the bottleneck limiting the flow... Could someone explain?