: Airaid CAI and tune on a stock CTS V coupe 6-sppeed results



Trainman SRT-10
05-17-13, 06:27 PM
Yesterday I was at RPM Motors in Santa Clarita, to get an AIRAID CAI and a tune on my 2012 CTS V Coupe (6-speed manual). Really nice gains , Same dyno (Dynomite, SAE correction, similar to a Dynojet in calibration).
Pure stock the rev limiter is at 6200 (or so) and I had them raise it slightly . Here are the results ( and we didn't put in a 160 Therm).

RPM......Pure Stock RWHP.....Airaid RWHP......Gain.........Pure Stock RWTQ......Airaid RWTQ .....Gain
2600.........212.9....................213.9....... ......+1.0................. 430.1..............432.0............+ 1.9
3000.........253.4....................265.7....... .....+12.3................ 443.6.............. 465.2...........+21.6
3500.........307.9....................321.7....... .....+13.8.................462.0..............482. 8............+20.8
4000.........349.1....................372.6....... .....+23.5.................458.3..............489. 2............+30.9
4500.........387.2....................416.7....... .....+29.5.................452.1..............486. 6............+34.5
5000.........409.3....................453.1....... .....+43.8.................430.0..............475. 9............+45.9
5500.........431.6....................477.2....... .....+45.6.................411.9..............455. 6............+43.7
6000.........451.5....................500.3....... .....+48.8.................395.1..............437. 9............+42.8
6200.........458.6....................507.2....... .....+48.6.................388.4..............429. 7............+41.3
6500..........NA.......................515.3...... ................................NA................ ..416.3...................
6600..........NA.......................515.6...... ................................NA................ ..410.3...................

I'm really pleased. Pure stock peak numbers were 458.6 rwhp and 463.1 rwtq, and after AIRAID and Tune, 515.6 rwhp and 489.3 rwtq.
AFR ratio was constant at 11.7 after tune and the boost was steady at 8.1 PSI across the board.

Houdini
05-17-13, 08:46 PM
Nice results! I think stock should be closer to 9 PSI.... you might want to check that out.

austin
05-18-13, 03:28 PM
Nice....

Which Airaid are you using, what is the part number... Dry or Wet filter?

Trainman SRT-10
05-18-13, 05:53 PM
Nice....

Which Airaid are you using, what is the part number... Dry or Wet filter?

Airaid 251-253, dry filter, plastic tube.

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Nice results! I think stock should be closer to 9 PSI.... you might want to check that out.

I checked the printout that had a numerical breakdown every 100 rpm and it did creep up to 9.1 at the end. I asked about that and they said it was probably due to a restriction in the stock exhaust and cats causing a rise in the cylinder pressure at a high volume moving through at higher rpm. Here's a breakdown at the higher rpm's: 5800=8.216, 5900=8.238, 6000=8.283, 6100=8.358, 6200=8.460, 6300=8.572, 6400=8.694, 6500=8.835, 6600= 8.995, 6700= 9.185.

austin
05-18-13, 08:28 PM
Here's a breakdown at the higher rpm's: 5800=8.216, 5900=8.238, 6000=8.283, 6100=8.358, 6200=8.460, 6300=8.572, 6400=8.694, 6500=8.835, 6600= 8.995, 6700= 9.185.

I'm surprised your tuner raised the rev limit that high and dyno tested it at 6700rpm... I can see raising it an extra 200rpm, but to 6700rpm.. He must be thinking you have the same internals as a LS9. It's a nice run and ill give you that, but looking out for your own good I think it's way too risky to keep running a stock LSA at 6700rpm. On another note, great comparison of the Stock run vs Airaid run thanks alot for that.

UBNZO6D
05-19-13, 12:10 PM
Charlie raises to the customer request...It does not mean that Jerry revs it that high as I'm sure he shifts when it stops making good power...

Greg

Random84
05-19-13, 04:00 PM
Charlie raises to the customer request...It does not mean that Jerry revs it that high as I'm sure he shifts when it stops making good power...

Greg

Seems odd to dyno it that high unless the owner secifically requested a 6700+ limit - and then there's the whole "free advice" thing from an experienced tuner. OP describes his request as raising it as "slightly," so I agree it probably was specifically OP's request... it just seems like someone would say "how about 6400 RPM on stock springs - you know, just to not press your luck?" :D

Trainman SRT-10
05-19-13, 09:27 PM
Charlie raises to the customer request...It does not mean that Jerry revs it that high as I'm sure he shifts when it stops making good power...

Greg

I only asked it be raised, I did not ask for a specific RPM limit. The car is still making power at 6600 rpm (peak power). At the latest test and tune I power shifted at 6500 (as best I can tell from the factory tach) each time still pulling and no loss of power. Once I get the launch down better my times will improve, as my MPH show good power and 11 second ET potential. Best run: DA 1250', 60' 2.055 (street tires), 1/8th mile 8.07 @ 93.16, 1/4 mile 12.240 @ 118.91 mph.

mrkool
05-20-13, 01:49 AM
so if you don't get a tune do you still get these kind of numbers from just a CAI?

Trainman SRT-10
05-20-13, 03:07 AM
Probably not.

austin
05-20-13, 09:09 AM
so if you don't get a tune do you still get these kind of numbers from just a CAI?

http://youtu.be/NIwuW1ovkW4 :)

Gary Wells
05-20-13, 11:14 AM
so if you don't get a tune do you still get these kind of numbers from just a CAI?

Without the tune, try about 6-7 RWHP at best.

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Previously posted by user name "newcadman" on this forum on 07-31-2010

P07-31-2010: 06:53 PM: newcadman: Re: All KPE CAI owners: As indicated I took my 2009 V -auto- V (7000 miles) to the same (dynojet) dyno where it was previously tested when it was bone stock…………… Three pulls were made with the now installed KPE cai. End result, the -engine- made 8 MORE rwhp on its best pull than it did on its previous best bone stock pull.

austin
05-20-13, 07:22 PM
I only asked it be raised, I did not ask for a specific RPM limit. The car is still making power at 6600 rpm (peak power). At the latest test and tune I power shifted at 6500 (as best I can tell from the factory tach) each time still pulling and no loss of power. Once I get the launch down better my times will improve, as my MPH show good power and 11 second ET potential. Best run: DA 1250', 60' 2.055 (street tires), 1/8th mile 8.07 @ 93.16, 1/4 mile 12.240 @ 118.91 mph.

I may have to take back my concerns..... I searched for a LSA Crate motor and in the details section it has 6600rpm as the max recommended rev limit. Everywhere I looked had 6600rpm as the max recommended limit. That is from GM's own LSA the spec sheet.

http://www.chevroletperformance.com/EngineShowcase/index.jsp?engId=LSA&engine=LSA&sku=19211708&engCat=ls

http://www.jegs.com/p/Chevrolet-Performance/Chevrolet-Performance-LSA-62L-556HP-CTS-V-Supercharged-Crate-Powertrain/2122868/10002/-1

UBNZO6D
05-20-13, 11:14 PM
I think he's referring to the ET & MPH...

gaduser
06-06-13, 04:05 PM
Nice improvement. So far, my 2011 Coupe is stock. However, I wonder if my exhaust is right.

While looking over the underside of my V Coupe, I noticed that the cross section of the left exhaust pipe is quite oval, while the right is circular. That is in the area immediately behind the flange where the pipe becomes parallel to the ground. The height of the left pipe section is about 1.7 inches while the right is about 2.5 inches, the pipe diameter.

That really seems odd for a high performance system. Since the two sides are so symmetrical, I would expect the pipe dimensions to be very similar at each point. Further, I expect that symmetry was actually chosen to provide good back pressure balance over the operating range.

How does your's look? I would really appreciate hearing.

Regards,

gad

Boosted2000si
06-06-13, 07:20 PM
WOW! Impressive!

Random84
06-06-13, 09:49 PM
I may have to take back my concerns..... I searched for a LSA Crate motor and in the details section it has 6600rpm as the max recommended rev limit. Everywhere I looked had 6600rpm as the max recommended limit. That is from GM's own LSA the spec sheet.

http://www.chevroletperformance.com/EngineShowcase/index.jsp?engId=LSA&engine=LSA&sku=19211708&engCat=ls

http://www.jegs.com/p/Chevrolet-Performance/Chevrolet-Performance-LSA-62L-556HP-CTS-V-Supercharged-Crate-Powertrain/2122868/10002/-1

Interesting thread on LS1Tech:
http://ls1tech.com/forums/generation-iv-internal-engine/1097915-why-6200-rev-limiter-lsa-engine.html

It would be nice to "know" the valvetrain is stable to 6600 - a spring replacement and tune would make this thing unbelievable.

Note: one poster in the above thread mentioned the "marine version" of the LSA having a lower RPM limit due to warranty concerns and the amount of time a marine engine spends at full throttle/high RPM ranges - the link below shows a fuel cutoff of 5600 RPM, but I don't know if there are any camshaft changes. Anyway, "warranty" purposes might very well explain why some people ran run these engines higher without valve float... but it also means you need to be preventative on your valve spring maintenance!

http://www.gmpowertrain.com/Libraries/Marine_Engines/LSA_6_2L_V-8_SC_Marine.sflb.ashx

I'm guessing the components are stable to 6600 RPM if Chevrolet performance is warrantying the motor for 36 months or 100K miles (!) as noted in the quoted links.

I would be changing springs every 40K regardless.

Trapspeed
06-06-13, 09:57 PM
The pipe looked the same way on my '99 Camaro SS. That is, until the headers and off road Y-pipe.