I had the S2 camshafts installed along with an Exhaust Depot Y-Pipe. We dynoed the car cold after they finished in 68 degree weather. We made 5 runs total in a row with no breaks for my poor car. The ECU was reset from the install. My runs are as follows:

1. 3rd gear - 223 whp 199 wtq
2. 3rd gear - 226 whp 201 wtq
3. 4th gear - 221 whp 199 wtq
4. 3rd gear - 229 whp 206 wtq
5. 3rd gear - 233 whp 210 wtq

As some may recall I have a Z-tube, motordyne lower plenum, motordyne spacer, and DC Sports headers that dynoed to 239 before these 2 additional mods. The techs were a little baffled, but as their a/f device was out I could not get the ratios to see how they were. I did notice for the first time though that my car was blowing black smoke out of the tailpipe for the first time the first few runs which leads me to think that the car was running rich initially and the ECU is slowly tuning itself as best it can. Jim Wolf is right though the S2s idle pretty much like stock but with a very slight lope once in a while (no shudder like it's about to stall) and I've had no issues with stalling or needing idle correction. Seat of the pants feel is that there is more torque beginning at about 1900 to 2100 rpm whereas pre-cams/y-pipe my car was sluggish to about 2700 rpm and flying from 3600 and up. The car is oddly much quieter than before, and actually runs smoother as I go through revs. The dyno is disappointing because their old data was lost and I cannot compare apples to apples because I do not know what settings they used the first time they dynoed my car compared to today. The graph is all over the place which I blame on poor dyno operation, but does show that it keeps pulling to redline with no tapering off. I do know though that when I took on the IS 350 at Lonestar Motorsports Park today (home of Hennessey) if anyone saw me I did beat it, which I hope means that my car is now in the 5.2 second 0-60 and 13.7 second quarter mile range, because the Lexus seemed to be doing everything right. I plan on going back for another dyno when they recover their old data, and possibly tuning. But at least now I know that an ECU reset does just that, and my dyno numbers are proof that the ECU does indeed learn after a reset even as temps got much hotter.

 

what was the cost of the cams? did you install or have them install? how much for the install if you didnt do it?

 

Get an Osiris Tune to complete your mods.

 

I paid $1000 for the install. There's no way I could handle the install myself.

 

It needs a tune ASAP.
What he said ^

 

yea obvious it will need a tune. you now have headers and cams but no tune. i wouldn't be suprized to see +20whp on the tune if you are shooting out black smoke.

 

get a catback ASAP and a spacer or taller plenum then get your tune

 

I sold my cat-back, already have a spacer so I'm definitely looking at the UpRev tunes now.

 

He said to get an Osiris Tune!!

 

So what exhaust do you have now?

If you are on stock that is going to be a major bottleneck.

 

headers, cams with no exhaust??

Like ttank said, ur car is begging for some air to be coming out of the stock very restrictive sedan exhaust.
Tune with osiris like everyone said.

 

why would you sell your catback? getting cams but taking out the cat-back is counter-productive.

 

*** that noise. Get a utech and a good tune.

 

For an N/A setup like this UTEC may be overkill. A good Osiris tune will do very well for a lot less $.

 

Y? i would take osiris over Utec any day. 5 different maps using the cruise control buttons and the only thing required to tune is laptop and a direct connection into ur OBD2 port.