Just thought I'd update. Ran the 1/4 mile today.

Time : 12.55 et
MPH : 109.65

Mods : Intake, Exhaust, custom midpipe, SAFC, & 80HP shot of Nitrous.

 

DAYUMM! Was this on street tires? Any weight reduction?

 

^ Weight reductions : spare tire & floor mats only. I was on 20" wheels 275/30/20 Nitto NT555. I have a video in the IS-F sub / Nat drag comp.
https://www.clublexus.com/forums/sho...=382064&page=5 post #71.
Their is alot left in her also. I have room in tire setups, better DA, and more weight reduction. On my next try I'll have a drag tire setup and pull the pass. seat.

 

sa-weeeeeeeeeeeeet run!

now let's talk about NOS in my car

 

I guess Jeremy gets James' c/t now

 

wow nice run.. when did you move up to an 80 shot, is it a custom nozzle?

 

whoa very impressive, i have only a 50 shot and i am afraid of using that already LOL

 

Just for this last weekend. I bought a jetting kit and have been trying out various HP settings. The IS seems to really like the 80hp jetting. Jet size N2O .41 and Fuel .22


Are you wet or dry? And don't be worried about it.

 

You have a 250?

 

yep, that why it make me afraid lol, and its a wet kit, but really mainly just for looks cause of the polished bottle

 

Won't that really bump compression to like 14:1 or higher?

 

The compression ratio won't change with N20 unless it changes your piston's face, bore, or combustion chamber volume at the same time.

Also from what I have heard N20 seems to like engines with higher compression ratios.

 

That's weird, I was told it pushes compression that's why nitrous makes power.

 

As I understand it basically cylinder pressure is how much pressure is placed on the cylinder walls from the explosion. Compression ratio is how much the material in the cylinder is compressed before the explosion.

Cut and paste off the web to answer the power question:

"When you heat nitrous oxide to about 570 degrees F (~300 C), it splits into oxygen and nitrogen. So the injection of nitrous oxide into an engine means that more oxygen is available during combustion. Because you have more oxygen, you can also inject more fuel, allowing the same engine to produce more power."

 

Hmm...good to know about nitrous. Thanks James, I wasn't disagreeing with you, just telling you what I was told. I see you ran 12.4 now? Nice!! Sorry off topic