Im gonna try this NXL dp kit and work up to a 200 RWHP shot on the stock stuff (car in sig.) Not gonna spray in 1st gear, and not going to spray through the shifts. I am gonna use a stand alone fuel system with a cell containing some good gas. What A/F should i shoot for? Anyone reccommend a gas that you like and would work well for this kinda setup? Any other hints or good advice? Plugs? Direct Port dyno sheets? Ect. Thanks a million.

 

I started spraying a TNT 200rwhp shot just before I put the car away for the winter. I ran the A/F ratio at 11.2-11.5 across the board (I like to shoot for low 11s), 22* of timing, 100/106 octane mix, TR-6 plugs gapped at .035. My fuel pump seemed to struggle to keep up so I had acouple of small lean spikes to around 11.8-12.0 but you shouldn't get that with your stand alone set up. Overall the car seemed happy with this set up, it didn't spit out any parts anyway.

 

what fuel pump are you using GM muscle

 

Walbro 255, no hot wire kit or booster. I'm relocating the regulator and adding a hot wire kit this winter so it should be good to go in the spring.

 

NXL with a dedicated fuel system? Sounds nice. I was thinking of that myself, but after getting it figure it would be easier to go with a different setup as the NXL replacing the stock fuel rails leaves nowhere to mount/receive dedicated fule supply. How do plan on running yours?
Also jetting pattern for the NXL at 200 should be able to do a search and find the jet sizes you'll need since it doesnt come with 200 jets. I ran the 180 for some time, hooked up to the stock lines of course, and it actually ran slower ET & MPH than the old wet kit did at 150 which I contribute to the "lean spike" and intiail lag off the line.

 

yes you cannot pull that much fuel from the rails, don't cae what they say. On a direct port with a bigger shot its silly not to do a standalone. Shoot for a low to mid 11 afr like GM muscle said. Also be careful with a standalone. Its easy to get air traped into the line going to the fuel noid. This can cause a crazy lean backfire. I always purge my fuel noid. I have a fitting to make bleeding realy east by the fuel noid. I have never had so much as hiccup with the n20 on mine.

 

I will not be using their rails. I have heard they are having problems with the NXL rails. Im just gonna tap the solinoids into the stock rails and then use a stand alone to pull good fuel. We have done this on a buddy of mines ZO6. We are up to a about a 210rwhp shot on his car with no problems, hiccups, nothing. A couple of quick phone pics.