Post by
Brandon93240 »
https://forums.nicoclub.com/brandon93240-u58236.html
Tue May 08, 2007 3:03 am
I wouldn't listen to anyone who hasn't had first hand experience with nitrous on a 240. I've had some sort of kit on my car for over 8 years, alot of street racers in the houston area can vouch for seeing my car run not only on the streets but at the track also. So in other words if u've never had a kit on ur car, or a car that u tuned urself this guy doesn't need ur 2 cents. As for the fp reg. My fuel system was completely stock up to when I had more than a 100 shot other than a z32 fuel filter, which isn't really a mod, just a new filter every 2-3 months. If u try spraying on an all original 200k mile motor, chances are something will go wrong. Thats why u need to check the condition of the enigne and supportive systems first. I guess I'll make a break down of what I had and what I think is safe.All examples are with 93 oct unless noted.
50 shot-no mods needed(in consideration that the engine is in good running condition)
75 shot-atleast need 1 step colder plugs, recommend pulling 2 degrees timing if u live in a hot climate
100 shot-step colder plugs, 3-4 degrees pulled atleast, mix 100 oct with 93, I usually did half and half until I got my aeromotive.
125 shot- 2 step colder plugs, no iridums(trust me the electrodes will melt, have pics) 4 degrees pulled, half half fuel, fp set to 46 psi at idle.
150 shot-same as above, increased fuel pressure to 48 psi at idle
175 shot- 2 step colder plugs, safc, same fuel pressure, super98 and 114 cam2 half and half mix(kiss ur 02 sensor goodbye)pulled 5-6 degrees timing.
200 shot-tried this a few passes, kept melting electrodes, car ran good on the bottom end of the track but the top end it was leaning out, didn't have the wideband on at the time to see my a/f's so I rejetted to the 175.
This car was setup by me and Conley's on a dyno with a wideband from the 100 shot to the 175 shot. The jets I used weren't the recommended jets from NX, if u run a NX dp kit I'll give u the sizes of the jets needed for the actual gain wanted. I don't recommend using NOS kits, the seats are brass and are bad about leaking, NX are all casehardened and ss bodies. The only other person I know of who has had a large hit on a 240 is Chris Aries, I don't think he comes around that much anymore, also a Houstonian, I know he's seen my red s14 in action at RSI on westimier. Almost forgot, I used a dp kit when I went from the 100 to the 125 and up. I really don't feel its safe to use a single nozzle kit for anything larger than 75 even if u are using the pirana nozzle.