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Old 05-21-2013, 08:19 PM   #1
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Loss of low end torque w/ Roto-Fab CAI on 2013 ZL1?

Hello,

Anyone have solution or answers to the above subject matter.

I made this my first performance mod, but I don't feel any increase in HP.

If anything car feels slower on initial launch, w/ less torque??
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Old 05-21-2013, 08:48 PM   #2
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Your the only one so far ...
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Old 05-21-2013, 08:55 PM   #3
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The butt-dyno isn't really any way to gauge gains, or losses. i'd take it to the dyno and see what it is making, but without baselines it won't tell you much
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Old 05-21-2013, 09:22 PM   #4
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The butt-dyno isn't really any way to gauge gains, or losses. i'd take it to the dyno and see what it is making, but without baselines it won't tell you much


And my butt-dyno thinks the gains are substantial
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Old 05-21-2013, 09:35 PM   #5
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First drive after the rotofab ---- HUGE gains. Especially low end. I have never had a vehicle with such a "seat of the pants" power increase on a bolt on mod.
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Rotofab, grinding rear diff sound forever, dealer replaced supercharger - now i have a rattle when starting from a stop, ordered 2.35 lingenfelter pulley, hp tuner, belt, 100mm idler pulley, tr7IX spark plugs, wideband kit, long tubes with no cats...hoping for 650hp. dyno with rotofab = 518hp
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Old 05-21-2013, 09:45 PM   #6
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What octane fuel are you running? I had the same problem with the roto-fab intake, 91 octane, and no tune.
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Old 05-21-2013, 09:50 PM   #7
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What octane fuel are you running? I had the same problem with the roto-fab intake, 91 octane, and no tune.
Sunoco 93 octane. Maybe i need to pull the fuse to reset the ecu?
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Old 05-21-2013, 10:05 PM   #8
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Don't worry. I didn't feel anything either. I don't believe butt Dyno works in 25HP increments. Times and Dyno will prove your arse wrong though.
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Old 05-21-2013, 10:52 PM   #9
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I didn't do a stock dyno, so I don't know, with the Rotofab it was 511 1st pull, 515 2nd pull...


That being stated, I knocked over 1/10th a second off of my 1/8th mile time the week after I put it on, I was launching better, so which was it, maybe a bit of both me and the mod
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Old 05-21-2013, 11:06 PM   #10
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Quote:
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Sunoco 93 octane. Maybe i need to pull the fuse to reset the ecu?
Did you buy the car brand new? If you did and you only put 93 octane in it, you shouldn't need to pull the fuse. I had problems because my motor was detonating. I got her in Chicago where they have 93 octane, but then I shipped her to California (where my duty station is located) and unfortunately Cali only has 91 octane. I installed my roto-fab and and got her on a dyno and was making 505rwhp and only 470rwtrq. At wide open throttle my motor was detonating and I was already at 95% duty cycle. I bought more mods(mods in SIG) and went to Cunningham Motorsports. They inststalled all the parts and got the famous 91 octane street tune by Ryne. She runs better then stock and performs like a beast. I actuallty picked up more mpg on the highway as well
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Old 05-22-2013, 12:39 AM   #11
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I know California is mentally hilarious, but what is the deal with the 91 octane, have they started banning having fun unless you are a pot head out there?
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Old 05-22-2013, 05:00 AM   #12
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I'm sorry but with a CAI, I wouldn't imagine that you would experience the additional HP in a significant fashion. I mean you will have a nicer looking and sounding car but as far as the additional 35 or so HP, I wouldn't expect to feel any significant difference.
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Old 05-22-2013, 06:43 AM   #13
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What mode are you driving in? The torque management may be kicking in.
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Old 05-22-2013, 06:46 AM   #14
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Quote:
Originally Posted by NightmareZL1 View Post
First drive after the rotofab ---- HUGE gains. Especially low end. I have never had a vehicle with such a "seat of the pants" power increase on a bolt on mod.
I agree, power gains throughout entire range. Least obtrusive mod with the most impact one can do to the LSA IMHO. Very noticeable TQ and HP increase to the trained rear dyno tech.....
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Old 05-22-2013, 06:49 AM   #15
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totally, you just can't help but notice that it is different. From slow 10mph turns, to freeway accel, more balls everywhere. It's awesome.
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Rotofab, grinding rear diff sound forever, dealer replaced supercharger - now i have a rattle when starting from a stop, ordered 2.35 lingenfelter pulley, hp tuner, belt, 100mm idler pulley, tr7IX spark plugs, wideband kit, long tubes with no cats...hoping for 650hp. dyno with rotofab = 518hp
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Old 05-22-2013, 06:55 AM   #16
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I felt the same thing until I added high flow cats I think you have to work on both ends to make it breath better
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Old 05-22-2013, 07:05 AM   #17
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...possibly the guy with the ZL1 claiming loss of low end power after installing Roto-fab CAI is running on the low octane table.., has too little miles on the motor yet, or has an incorrect instalation with some obstruction or loss of vacuum. From my personal experience there is another issue at hand other than that of a properly running ZL1 with a properlly installed Roto-fab ZL1 CAI to make one say it has a low end problem.
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Old 05-22-2013, 07:48 AM   #18
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Quote:
Originally Posted by OldScoolCamaro View Post
...possibly the guy with the ZL1 claiming loss of low end power after installing Roto-fab CAI is running on the low octane table.., has too little miles on the motor yet, or has an incorrect instalation with some obstruction or loss of vacuum. From my personal experience there is another issue at hand other than that of a properly running ZL1 with a properlly installed Roto-fab ZL1 CAI to make one say it has a low end problem.

I tend to agree I noticed it spins wheels a lot quicker,I have been running 104 from the get go .I found it very noticable not even really pushing it.
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Old 05-22-2013, 08:52 AM   #19
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I don't see how you couldn't feel the extra power unless something else is not ideal. The additional airflow allows for more boost which is noticeable throughout the power band. I can understand not feeling the difference in normally aspirated car, but with most of the dynos adding over 30 at the wheels, this should be a butt dyno improvement.
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Old 05-22-2013, 10:10 AM   #20
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Quote:
Originally Posted by 2012-1822 View Post

I know California is mentally hilarious, but what is the deal with the 91 octane, have they started banning having fun unless you are a pot head out there?
I was just trying to explain my situation lol
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Old 05-22-2013, 12:36 PM   #21
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pull your fuses then do a run with the nannies off.

post in a pic of the install to make sure the tube and maf are oriented correctly.

I did pulley, TB, CAI all at once so in my case it was like I was driving a differnt car. never drove it will just CAI.
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Old 05-22-2013, 04:29 PM   #22
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I feel a little bit of extra pull in the upper RPM's when going WOT but for the most part you can't really feel a 25hp increase on a car this heavy. Once you do more mods like a pulley, headers, tune, etc. along with the rotofab you will feel the extra power. I just love the sound of the supercharger whine now when going WOT, especially when outside temps are somewhat cool
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Old 05-22-2013, 05:15 PM   #23
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It's a great ROI and easily reversible for the purist. I was surprized to see how little air intake ports there are on the stock box after I got it off. So, it certainly gets much more air with the RotoFab.
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Old 05-22-2013, 05:36 PM   #24
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I didn't really notice a gain in power with the Roto-Fab install, but I absolutely love the sound of the supercharger whine. I was a little disappointed that I couldn't hear the supercharger very much when I got the car, but now I'm even more in love with car because of that sound. I didn't feel any loss of power, though.
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Old 05-22-2013, 09:36 PM   #25
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Quote:
Originally Posted by Whos_Drivin View Post
What mode are you driving in? The torque management may be kicking in.
nannies off/ traction control off. Anyway .. guess i should have done my homework before deciding on this mod.. Now i have a head turning super charged air sucking machine that screams under the hood when i exhilarate, but it is now not as fun taking off from dead stop w/ less torque.

I have read that with a CAI mod for most cars it seems to be normal that low in power/torque is compromised .. but the gains are pushed towards the upper rpm range which is basically only a benefit for track driving.
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