Overall I was very happy with the results which I'll detail in a moment. The results were (plot is below):

369.0 WHP
310.4 WTQ

And with a very impressive and flat torque curve.

The conditions were not ideal. It was nearly 90 F outside at the time of the dyno and was muggy as can be. This is contrary to what it was the last time on the rollers; about 40 F. Although it is SAE corrected that does not account for timing changes made by the ECU when seeing these temperature differences. Intake temps on the previous dyno were in the 70 range; this time they were in the 110 - 120 range. I'm going to go back next winter and make some more pulls just to see the difference but I would not be surprised to see 380+ WHP (10 - 15 WHP more),

I am also glad to see this was in the range I speculated on. I guess my calculations were somewhat correct.

In the below image are three plots. The red one is one of the old ones which was run at about the same A/F ratio and had no knock at all. I had made 323 WHP previously but that was running it leaner and with audible knock present. I wanted a like comparison so went with this plot to compare with.

The green line was through the stock exhaust which was also done on the old one (red line). Right off the bat the IC and 2 PSI more boost gave me 40 WHP and about the same in torque. The results would certainly have been greater than what is shown if done in like conditions with the same IAT readings. I would expect another 10 WHP gain if run in 40 degree weather which would give the total gains from the IC and boost at about 50 WHP and 50 WTQ.

The blue line is with the exhaust cut-out open and is obviously the highest output. This was somewhat surprising though as I expected a greater change in power. As you can see, torque did not drop off as much up high but was nearly the same down low, actually losing some at points (not altogether surprising). But man was it loud in there as WOT up top.

That little gain, percentage wise, is not enough for me to consider an exhaust change now. I would expect maybe 8 - 10 WHP from high flow exhaust which is not worth the extra sound IMO.

The one surprising part is lack or torque continuing up high. I expected the torque to stay flatter at the upper revs due to the change in runner design. But I guess I was wrong. It certainly is not bad but I did expect a little better flow up top. It may be that no matter how well the intake flowed, the bottled up exhaust was going to limit it at this point. With the cut-out open boost did drop nearly 1 PSI which is expected.

So in the end, 369 WHP was made on 7 PSI intercooled boost.

I guess with an exhaust though I could get another pulley and raise boost a little more. In colder weather that could give me 390 - 400 WHP. Hrmm, maybe I am not done yet...

Full Dyno Plot

 

One thing I forgot to mention or highlight, look at the torque gains with the IC system in the mid range. About 50 lb/ft at about 4700 RPM.

 

unreal, awesome results man!!!


the torque curve is

 

So the exhaust dump WORKS well!!!.... sweeeet...

 

369.0 at the wheels?!

 

One other thing I love about it is having over 260 Lb/Ft at the wheels minimum which was nearly the same as the previous maximum.

 

Scalbert, can you post all your mods here? I couldn't find it in your profile and I know that's gotta be more than a CL-S with I/H/E + s/c + intercooler.


Also, are you running stock compression?

 

You pretty much nailed it though. With the addition of the Greddy E-Manage for fuel management. I did have my TB ported but that ends the list.

Yes, it is the stock compression as the internals have not been touched.

 

Excellent Numbers!

EyeNVU!

 

How long before a trip to the good ole 1/4 strip?

 

Pimpressive

 

That's just insane! Great work man!

 

Soon, once I get the traction items together. If I go this summer I will also need to go back later in the fall when it cooler to see the difference.

 

 

Another thing I wanted to note; this should allow a 5AT CL-S to make in the 330 - 340 WHP range.

 

BTW, this means the engine is making about 445 HP. I don't think that was in the plans when the J32A2 was designed. :o

 

excellent work steve!

 

Excellent work Steve. The numbers are amazing.
Now how do you plan to keep the front end on the ground during launch attempts ???

Shawn S

 

Wow Steve... good work!!! I remember saying 370whp!!

 

I see 110+ mph trap speeds... this is exciting!! Do you have an AFR plot Steve? It shows up the exhaust cutout doesn't play a significant role in an S/C application. I picked up ~20whp at 5.5 psi with an open exhaust.

Boy, you have definateley raised the bar up a notch

 

369 whp is insane for this car! keep up the great work!

 

You have the ultimate sleeper Steve...good luck working out the traction issues

 

Now I really can't wait to get the kit!!!

 

you are the pimp.

 

omg you are the king man, i wanna see some 1/4 mile times after you finish your torque bars !!!!!!!!!!!

 

I don't even try to launch it anymore, that wheel hop will shatter fillings.

 

Yep, looks like the educated guesses were as close as you can get.

 

wow... inspirational

 

Oh my.. that is impressive numbers Steve!

btw, i can't remember if your system was water to air, or air to air? If its water to air, any thoughts of having an opening for dry ice or ice for additional (track use) cooling? What about the NOS system the have for cooling the intercoolers, if it is air to air?

Again, congrats on the awsome numbers!

 

No A/F plots as I just referenced the Tech Edge display. But it held pretty consistent in the high 11's:1 range. Even with the cut-out open it only went up a few tenths. I was a bit surprised about how little the gain was; 14 WHP is not to bad but I did expect more.

The bar is only raised for what, a week or two until you get everything put together?? Now I'm in a quandary, I was fine when I left the dyno in leaving this alone. But knowing that a freer flowing exhaust might allow me to run another pulley and bring it back up in the 8 PSI range thus making 15+WHP is enticing. But then again, would the extra power be welcome with the additional noise. I like how quiet the car is right now but the thought of possibly making 390 WHP in cooler weather is attractive.

Oh well, I'll wait on this some as I wouldn't go back until this winter anyway. That gives me time to mull it over. In the mean time I'll also look into other possible changes to help get to 400 WHP. That is a level which I know is not going to be difficult for your set up.

The one great thing about this car right now is the drivability; it is incredible. The power is everywhere and is completely seamless and linear with throttle input.

 

I am very impressed scalbert!!

 

your joking right?.. 14 WHP from a estimated $150.00 dump is well worth it.. besides this is what we calculated when I first came up with the idea.

 

Pretty soon you will have a 330+ WHP beast.

 

Well, $250 with the installation.

I just expected more from it though but am not all together disappointed. At these power levels I just assumed that the factory exhaust was going to be more restrictive than it was. :o

 

Water to air. I have a reservoir which I can add ice to. I added a little after arriving as I had been stuck in traffic for a while just to help get things to a reasonable level. But a full replacement with ice water could be impressive.

 

That is one hellacious amount of power at the front wheels. And how often do you plan to replace your tires?

 

I have already accepted < 10k replacement period. :o

 

Great #'s!

How driveable is it though? I hear so much bad press with FWD cars that have a ton of power.

 

It depends, if you drive normally it is fine. 1st and 2nd gear do not allow for WOT but I can control that. There is no real feel of torque steer unless in an unusual situation. Overall it is fine and drives like a stock CL-S, just pulls much harder.

 

Any changes to the maps during your dyno session... or basically you tuned it before-hand and just went to the dyno to see what it put down?

Any power differences depending on the boost-cut clamp voltage set in the E-Manage?