Katech_Zach

If you were following Halltech's latest upgrades, you know that we have a new camshaft for the LS7 that is designed to be a step up in aggressiveness from the Torquer 110. I haven't had much seat time with it yet, but Jim says it drives "as good or better" than his Torquer 116, which personally don't understand, but hey it's a great testimonial. We have another car getting the same cam so I'll get some seat time in that. The next car getting the cam will be going on the engine dyno so we can see exactly how much more power it makes than the Torquer 110, but it's probably going to be around 20 more based on testing with Halltech. Valvetrain dynamics are very good as we published in our test. Spring, seat and retainer combination are the same as used on the Torquer line, the PSI-LS1511 with KAT-4678 retainer.

The name K501 came from an internal codename for the camshaft and it just stuck, although Jim Hall calls it the Kavorka cam - the lure of the animal - for you Seinfeld fans.

Specs: 235 / 251 @ .050, . 657/ .660 lift, 113 LSA

http://store.katechengines.com/k501-camshaft-p389.aspx

Stay tuned for more dyno numbers.

blacktavert

Been waiting for the specs to come out.
Was planning to use the comp cams off th shelf 146-460-11 (285LRR HR13) cam in my car
Specs look identical to you new cam. any difference?

RedZ4me

Its a secret ^^^j/k

OJCrush08

I am interested in some real world follow-on here. I am currently running the 110 Torquer with fully dressed out WCCH heads, FAST, etc and I am ok with it's street manners given the substantial increase s in power.

Very confused about real world driveability given Jim's statement comparing to his milder 116 grind and your statement implying this new cam is a "step up in aggressiveness."

Looking forward to clarifications, video clips, etc.

rpm94

Nice!

I just bought some go fast parts from you back in May.

Custom painted Fast Intake
Your valve covers
Coil relocation kit
Billet fuel rails and installation kit, etc.

Also picked up some Pfadt headers.

Been waiting on some feedback on this cam. If it is all that Jim claims it is, I will be ordering one soon.

Now I just have to decide on what route to go with my heads.

u1arunit

Need more info, comments, vids, proof, etc. I know that Jim is a straight shooter and this puzzles me too. Jim are you out there...?

Halltech

Car starts perfectly. Just like it did with the Torquer 116 grind. I had a Z06 with the Torquer 110 and did not like the lumpity lump. For me, it was too much shaking at idle.

The K501 idle is slightly more radical that the Torquer 116, but not by much. It is far superior to the Torquer 110 as far as manners. I went for a ride in a 501 cid Katech build with Jason that had this cam, and wanted it immediately. This is why I called it the 501 cam for a year and pushed and pushed Katech to Spintron it. It is the "Kavorka" cam (K501)

I have absolutely no surging on the freeway in any gear including 6th.

Fuel mileage took a hit. Traction has increased below 4500 rpm, which is a good thing. Power from 4500 rpm to 7300 rpm cannot be described in words, without sounding stupid, so just figure it out. 2800 lbs/608 RWHP with 600 from 6200 rpm to 7100 rpm.

Lower speed driving in 2nd gear has a slight surge, but that is easy to fix with minimum airflow tables. Reversion waves do this, but the Super Bee keeps the MAF sensor far away from the throttle body.

I made one change in the programming to suit my way of tuning for e85, which makes the clutch engagement and idle quality better on my car, but have not had time to log information and tweak it. I will have Katech's tuner check it out at Track Attack 2013.

The clutch: a piece of ****. I hate it. 28lbs is fine, but without the inertia from the heavy flywheel, and 13.2:1 CR, clutch engagement is a bear. The worse part is that the engagement window is way up at the top of the throw and about 3/4" or less window; my leg is bent, to where holding it in that awkward position to smoothly engage is near impossible. This was difficult before with the T116, but now it is exacerbated by the higher compression, flywheel, and maybe to some extent the cam. This would not be an issue at all with the Katech dual clutch, which we had before. It all started with the clutch and CR.

This weekend we will install the Ram Pedal Adjuster to get some leverage back. The high engagement would be perfect for power shifting at the strip, but not the street. It could easily shave .1 allowing shifts with just a touch of the clutch. Still a POS since I use the car as an everyday driver.

The Katech dual clutch was as sweet as stock with our T116, and weighed a lot more. Highly recommended with this cam.

Check out the power curve on this cam. Torquer 116 vs. K501:

EX1

I would like to see some overlaid graphs of the 110 and this new cam.

Katech_Zach

This project http://forums.corvetteforum.com/c6-z...6-project.html is getting the K501 cam and should be on the dyno next week. I will have the opportunity to overlay engine dyno graphs at that time.

EX1

Looking forward to the results, thanks!

OJCrush08

I don't mind the "lumpity lump" idle most of the time on my 110, but must admit on occasion I could do with less. If you can tell me that the new cam is smoother and makes more h/p AND more torque, I might consider adding a cam swap to this winter's list (along with better seats, and c/f roof plus halo to match the hood. I sure by that point my wife will be thinking about a "husband swap!"

Halltech

Definitely smoother. The 113 LSA helps a lot. the power speaks for itself.

Katech_Zach

Here is the K501 cam (black) vs. the Torquer 110 (red). These are two different engines, but as similar as can be. They are Street Attack LS7s with WCCH heads, FAST intake, 102mm TB, CF112, and ARE dry sump systems.

blacktavert

Thanks for sharing that graph
interesting to look at the different lines of each cam

Halltech

How about the third line for the Torquer 116? Our motor would not be a fair comp. since it had higher compression.

Katech_Zach

Not an exact comparison:
No ported heads
No FAST Intake

SmokinZ

Wow, very Nice!

116-Black
110-Blue
K501-Red

Michael_D

I have a very simular cam. 236/255 648/670 113. It is a custom EPS grind. I have put a lot of work into the tune and still have a mild surge between 1500 and 1800 rpm. I have not been able to tune it out. The heads are ported with the swirl damn mostly removed. OE SCR. This most likely contributes to the low load surge. I only mention this so others are aware that the potential exists that they might not be as successful as Jim has been dialing the surge out. Low load surge is a product of overlap and can't always be dialed out, more so if the swirl damn has been removed. I am also running a MAF foward Haltech intake, ported Fast, Velocity ring and 60# injectors.

Halltech

Try turning on the LTFTs and retune.

Halltech

What is the status of your radiator shroud near or below the filter? Any holes or Vette Air.

Our car has never surged. It is as smooth as stock. So was the 501 that Jason and I road in.

We are using closed loop after 102F and with E85 it provides a much smoother ride, & better mileage.