Z28z

iTrader: (1)

I'm currently running a 100 shot at full timing with no problems(I believe its at 10 degrees, whatever sticker under the hood states). Its an NX wet kit. I wanted to know how many dgrees I should retard the timing to run a 150 shot?

Z28z

iTrader: (1)

I was thinking 4 degrees, sound right?

LIL QIK

iTrader: (1)

I was told by NOS to count on 2 degrees for every 50 shot. Take it for what its worth.

Sparkee

I have heard the same thing: 2deg, per 50Hp. You should be retarded 4 deg. already. I would retard it a minimum of 4 degrees, but you would be better off closer to 6 deg.

Once you get to 150 Hp or more, you are pushing your luck with the stock fuel pump. I would use a fuel pressure safety switch. It turns off the NO2 if fuel pressure drops too low. I prefer to play it safe. Better to spend $40 now, than to have to rebuild my motor. Good luck.

Z28z

iTrader: (1)

With the NX kit I was told I could run the 100 shot with no retard. I already have an extra fuel pump, 2 stages colder plugs and an upgraded ignition.

91Bird305

I also was told that 2* for every 50hp shot. So 4* retard now and 6* retard when u run the 150 shot. And I also would go with a fuel pressure saftey switch, like he said, 40 bucks now or a whole new engine later. Its good insurance.

bjm323

I ran a 150hp shot all day long in my 91 305 TBI. Stock fuel pump no timing retard. NO problems.

12 Sec GTA

NX doesn't require you to retard the timing at all... I had a long discussion with John Stewart (the founder/owner/ceo of NX) about this.. But, i've heard 1degree for every 50hp on the "other kits" (nos, n.works, zex, etc.)

Superman

I also had a pretty lenghty conversation with John Stewart and he assured me that no timing retard was needed with the NX kits. I'm spraying 150 Shot and I took out 2 degrees just for peice of mind and have had no problems.

The Man

I run the stock timing on my TPI 6 degree on a 150 shot. 2 step colder plugs. I do run race fuel when I plan on racing alot just to be safe. I am going to put the 175hp in and see what happens.