hey guys what do u think is the most fastest and most realistic time for a 1991 240sx with full exhuast headers and no cat. and a cold air intake. thanks.

I dont know but that is my setup exactly to the tee and its pretty fast though nothing comparable to an sr20det. Here is my ride, have to take some pics of the motor.
http://atlas.walagata.com/w/flexart2go/my240sx.jpg

expect high 15's if your a good driver and don't have a lot of extra weight in your car. most likely though you will run low 16's. the i/h/e aren't going to add much noticeable HP. expect your mph to be in the mid 80's. and look for a 60' time of 2.1-2.4 depending on suspension and how good of a launch you get.

If it's your first time that you've been to the track then just imagine it being stickier than you think. I remember my first run down the track..... I launched at 4000 RPM while slipping the clutch. If I do that on the street then the tires spin all over so I thought that it would work really good on the track. The tires hooked right up and I left the line. The 2nd run down the track I slipped the clutch from 6000 rpm and just had very little tire spin. I'm sure you know it already, but slipping the clutch = possibly the worst thing you can do to it. haha

rosman i'd just like to say your 240 is maybe the cleanest one i've ever seen looks like its new mang.

rosman4u, hey nice 240 is yours a single over head cam? b/c mine is DOHC do u think that it makes that much of a difference. thanks

thx Ace$nyper, racerh03, its a sohc with only 140hp stock, but I had a 92 240 twin cam and yes it will make somewhat of a difference, being they have the same tq the launch is not so different but overall hitting higher rpms that 15 extra horses does help out, really doesn't matter to me since I will be doing the swap pretty soon, I'll take some pics of my interior and engine bay & post them as well.