keeso6z

Thanks Mike. That is what I was looking for. My performance shop thinks your cam will be to aggressive for me. Can you give me the cam specs and I will send it to him. What can I expect on the change in drivability vs the stock cam?

Katech_Mike

220 / 244 @ .050, .615 / .648 lift, 116 LSA

Driveablity itself will be close to stock with a good tune. You should not experience any bucking or surging. Because the camshaft shifts the power up in the powerband it may take a bit more throttle to take off from a dead stop.

keeso6z

What's the overlap?

DaOtherOne

Katech Torquer 116 220 / 244 @ .050, .615 / .648 lift, 116 LSA, Overlap 0.0

Apocolipse

With a ls7 stage 1 cammotion you can run the bone stock tune - so ya I’d say it’s pretty damn close while adding a few extra ponys when you floor it.

keeso6z

My performance shop thinks the Cam Motion LS7 Stage 1 cam is a little small and that I wouldn't attain my HP objectives. I don't know. I was hoping to pick up another 30-40rwhp with near stock drivability. Matt at 21st Century Muscle cars is recommending the AHP 116, although he has never installed one at his shop. Their customers generally go with bigger cams.

Apocolipse

AHP is 220/244 116, Katech is 220/244 116, CM Stg 1 224/236 118. Not sure where the small part comes into play when it has more intake duration and lift than the 116 cams.

Wass

Katech installed their stage 2 HCI package with their 116 cam in my 13Z, stock exhaust, and I picked up 92 whp. Yes, just a bit more throttle to take off from a dead stop, but hardly noticeable. However, I can cruise as low as 40/45 mph in sixth gear, light throttle, with no surge or bucking. Nice package with a great tune!

MTPZ06

Really?

keeso6z

What is your car making on the dyno? Why wouldn't you go with an MSD, long tube headers, high flow cat and X-pipe? That would give you quite a bit more power. I think headers sounds awesome and they definitely help the air flow. Also, lighter than the stock manifold.

Apocolipse

Yessir - if you shaved heads maybe pull 2 deg timing if you see knock otherwise it’s fine to do. Stock timing map pulls a few deg with calculated added cyl pressure from the cam.

Can a tune make it better? Yes. But don’t haaaaaave to.

Wass

Dyno Results Before: 428 WHP 398 WTQ After: 520 WHP 463 WTQ per Katech
The Katech stage 2 included the FAST LSXR 102mm intake manifold, however I believe I could have asked for the MSD instead. I had a goal in mind for my car, and that was to get close to 600 crank hp with longevity, as this will probably be my last Corvette. Katech does not install headers on street cars, and I was good with that. I thought long and hard before making my decision on how much power, and which shop I wanted to do the work. I've had headers on other cars, and chose not to include them this time around. As far as sound goes, the car is loud enough that my wife generally does not want to ride in it. When she does, she wears ear plugs. However, she can hear a rattlesnake rattle from 50 feet away! Very sensitive ears. The 2011-13 Z06 cars have ZR1 mufflers. When I traded my 09Z (stock) for my 13Z (stock) I told the salesman it had aftermarket mufflers when I did the test drive. He assured me it did not. The sound was and is much louder than my 09. So I am happy with what I have, with no intention of any additional power mods. Good luck with your cam decision!

keeso6z

Thanks for the feedback. I guess I'm doing pretty well at 526rwh and 491rwtq with the stock cam with stock drivability and torque down low.

keeso6z

I decided to go with the AHP 116 cam. Getting it installed next week and will post the results and give some input on drivability. I'm hoping for around 560rwhp and a slight bump in rwtq, with no discernable change in drivability.

DPW_

Look forward to your review, I had the same cam in mind also

keeso6z

I had the APH 116 cam installed this week and got the car back this afternoon. The car made 562.37rwhp and 504.57rwtq. Before the cam with just bolt-ons and milled and ported heads, it made 526rwhp and 491rwtq. So It picked up 36rwhp and 13rwtq. They didn't have to change the injected because it's a smaller cam. In driving it, I have one complaint that I overlooked about having a cam - the car shake at idle - and I don't care for that. But hopefully I will get used to it. There is no surging, bucking or anything else and it drives just like stock. I tested it on a first gear punch and the newish Pilot 4S tires struggle for traction now, whereas before it would hook. It's faster, but not significantly, as you are only talking about 36rwhp. A pretty expensive 36rwhp, but I wanted the best performance without impacting drivability and that is what I have. I just didn't consider the impact to the idle. I did read that the stock motor mounts can be switched out for poly mounts, which will eliminate or drastically reduce the shake and need to look into that. If I could get rid of the shake, it would be perfect.

Here is the dyno.

Apocolipse

There will be idle shake - if you reduce spark rpm correction you will lower it.

also see if they have the SAE correction graph not std.

keeso6z

It's more of a rock of the car. Not getting vibration inside. I will ask Matt about that and see if there is any adjustments they can make. I really don't want it to idle any higher. Looks like its around 900 now.

WA 2 FST

This particular shop typically uses STD correction (which we all recognize will read higher when there is significant correction applied due to atmospheric conditions). Given the weather we had over the last day or two in the Dallas area, when the car was dyno'd... CF either STD or SAE would be almost negligible, if not below 1.00.

double06

Do you know what a stock Z06 does on this dyno? At the end of the days its not all about stp or sae its also about where numerically it starts life as a stock car as some dynos read different than others regardless of stp or sae.