Z06 I got the itch again, my build 2.0 - CorvetteForum - Chevrolet Corvette Forum Discussion

Notices
C6 Corvette ZR1 & Z06 General info about GMs Corvette Supercar, LS9 Corvette Technical Info, Performance Upgrades, Suspension Setup for Street or Track Advertisement
Sponsored by:
Sponsored by:

[Z06] I got the itch again, my build 2.0

Old 04-23-2018, 10:54 PM
  #1  
vertC6
CF Senior Member
Support Corvetteforum!
Thread Starter
 
vertC6's Avatar
 
Member Since: Aug 2004
Location: Houston Texas
Posts: 4,002
Thanked 41 Times in 30 Posts
Default I got the itch again, my build 2.0

I think the saying goes you can't leave good enough alone. Well a year after finishing my car I decided I wanted a little more.

I was doing my heads last year when I found some issues with the stock cam and lifters and kinda rushed into putting in a cam. The cam I chose was nearly stock, basically just adding more intake duration (220/232 120+3). Here is the link to my original build

https://www.corvetteforum.com/forums...e-details.html

The car drove perfect and made good power 520 & 510 tq, but after a year of driving the car, and going to some car meets around Houston I realized I should have gone bigger with the cam because I wanted the cam sound and a stronger mid range power band. However, I still did not want to give up any drive ability for a little extra power.

I wanted something that made strong mid range torque, and not something that makes most of it's power at 7k rpms, but more mid range. I spend 99.9% of my time below 6500 rpm so that was my focus with this cam. I always loved the dyno graphs of the torquer 110 but it's a little to rough for me at 12 degrees overlap. The 116 is really not a torquer cam because it closes the intake at 46 (same as stock) where the 110 closes at 40 (to build more dynamic compression and make more torque for those not familiar with valve events). I decided to do a custom spec so I went with a 224/240 115+4 (2 degrees of overlap at .050. IVO 1 BTDC IVC 43 ABDC EVO 1 ATDC EVC 59 BBDC. The actual cam card came back at IVC at 42.6 which I was happy with. I went ahead and added an ATI 10% UD pulley while I was doing the swap.

I took my car back to SeriousHP in Houston for a touch up tune, and as I stated before to anyone in the area these guys are the best shop I have every worked with and I have been to a lot of shops over the years, I highly recommend them!

All in all I was very happy with the results, I was hoping to have a little more peak torque but as you will see on the graph the torque hits 500lbs at 3800 rpm and maintains past 5700. Final numbers were 549rwhp 518rwtq, but most importantly is drives the same as before. Has a nice little lope driving around town, and no bucking or surging. Here is the graph and the final dyno run.



Last edited by vertC6; 04-23-2018 at 10:57 PM.
vertC6 is offline  
Old 04-23-2018, 10:59 PM
  #2  
vertC6
CF Senior Member
Support Corvetteforum!
Thread Starter
 
vertC6's Avatar
 
Member Since: Aug 2004
Location: Houston Texas
Posts: 4,002
Thanked 41 Times in 30 Posts
Default

Dyno Graph
Attached Images  
vertC6 is offline  
Old 04-23-2018, 11:09 PM
  #3  
Jayfabs
CF Senior Member
 
Member Since: Nov 2016
Posts: 621
Thanked 58 Times in 53 Posts
Default

Nice results 👍
Jayfabs is offline  
Old 04-23-2018, 11:26 PM
  #4  
vertC6
CF Senior Member
Support Corvetteforum!
Thread Starter
 
vertC6's Avatar
 
Member Since: Aug 2004
Location: Houston Texas
Posts: 4,002
Thanked 41 Times in 30 Posts
Default

Oh and I forgot to mention the most important thing I checked my mold start 90 guides after 4500 mile with the Yella Terra rockers, and they were rock-solid. Just the tiniest amount of play which is within spec.
vertC6 is offline  
Old 04-24-2018, 01:27 AM
  #5  
Dan_the_C5_Man
CF Senior Member
 
Dan_the_C5_Man's Avatar
 
Member Since: Dec 2003
Location: Atlanta metro Ga.
Posts: 5,220
Thanked 293 Times in 236 Posts
Default

Very cool. If I was doing a cam I'd ask you to sell me the one you just pulled.
Dan_the_C5_Man is offline  
Old 04-24-2018, 07:58 AM
  #6  
vertC6
CF Senior Member
Support Corvetteforum!
Thread Starter
 
vertC6's Avatar
 
Member Since: Aug 2004
Location: Houston Texas
Posts: 4,002
Thanked 41 Times in 30 Posts
Default

I actually sold it to another member already, how's you car running?
vertC6 is offline  
Old 04-24-2018, 08:50 AM
  #7  
0H8Z06
CF Senior Member
 
0H8Z06's Avatar
 
Member Since: Mar 2006
Location: Dallas TEXAS
Posts: 12,432
Thanked 529 Times in 450 Posts
Default

Very nice... Congrats on new numbers...
0H8Z06 is offline  
Old 04-24-2018, 09:53 AM
  #8  
jayyyw
CF Senior Member
 
Member Since: Jun 2015
Location: Austin Tx
Posts: 2,540
Thanked 230 Times in 212 Posts
Default

Awesome man. I want to do a new cam but man is it a PITA to do. I'll be installing an ATI 10% UD and am really thinking about it since I'll be 60% of the way there already.
jayyyw is online now  
Old 04-24-2018, 10:22 AM
  #9  
vertC6
CF Senior Member
Support Corvetteforum!
Thread Starter
 
vertC6's Avatar
 
Member Since: Aug 2004
Location: Houston Texas
Posts: 4,002
Thanked 41 Times in 30 Posts
Default

More like 85%

Last edited by vertC6; 04-24-2018 at 10:23 AM.
vertC6 is offline  
Old 04-24-2018, 11:17 AM
  #10  
jayyyw
CF Senior Member
 
Member Since: Jun 2015
Location: Austin Tx
Posts: 2,540
Thanked 230 Times in 212 Posts
Default

Originally Posted by vertC6 View Post
More like 85%
Rough estimate, lol.
jayyyw is online now  
Old 04-24-2018, 11:28 AM
  #11  
danziger
CF Senior Member
 
danziger's Avatar
 
Member Since: Nov 2001
Location: Pensacola FL
Posts: 26,425
Thanked 29 Times in 28 Posts
Default

Love that torque curve!
danziger is online now  
Old 04-24-2018, 12:22 PM
  #12  
roastin300
CF Senior Member
 
Member Since: Jan 2014
Location: Rockledge, FL
Posts: 306
Thanked 10 Times in 8 Posts
Default

Nice curves! I prefer leaving 20 peak whp on the table, picking up 30+ wtq everywhere else and not dealing with the driveability issues when using a smaller cam rather than a high rpm peak power cam. And this is coming from a professional tuner that can handle the big cams.

In many cases, the slightly smaller/torquey cam will actually be faster in the 1/4 mile if that's what your into. It definitely helps out of the corners on the road course as well.

Congrats!
roastin300 is offline  
Old 04-24-2018, 01:53 PM
  #13  
vertC6
CF Senior Member
Support Corvetteforum!
Thread Starter
 
vertC6's Avatar
 
Member Since: Aug 2004
Location: Houston Texas
Posts: 4,002
Thanked 41 Times in 30 Posts
Default

My thoughts exactly! I am not one to do a lot of freeway runs risking tickets, or worse jail time, so mainly my car is just for running around town having fun with it. I drive pretty aggressive so I want that mid range torque, and yet still have perfect manners when driving through parking lots.

I too have been in big cam cars before and I don't care for how the car behaves in everyday street driving. When you look at dyno graph's of bigger cams the suck down low and don't make power until 5k rpm.

Last edited by vertC6; 04-24-2018 at 01:54 PM.
vertC6 is offline  
Old 04-24-2018, 02:11 PM
  #14  
lamboworld
CF Senior Member
 
Member Since: Dec 2015
Location: Somewhere in NC
Posts: 911
Thanked 90 Times in 80 Posts
Default

Great results. I went through the same delima and unfortunately a few cams before I found what I was looking for. I wanted to be able to cruise in 6th without bucking and I can do that with my current cam as low as 1100 rpms. I still made 564whp and 502wtq. My cam is 236/250 .635/.635 lsa115+4. I had Pat G spec this cam for me based on my goals and how I planned to use my car.

Do do you know what your corrected SAE numbers are?

lamboworld is offline  
Old 04-24-2018, 03:09 PM
  #15  
vertC6
CF Senior Member
Support Corvetteforum!
Thread Starter
 
vertC6's Avatar
 
Member Since: Aug 2004
Location: Houston Texas
Posts: 4,002
Thanked 41 Times in 30 Posts
Default

I never asked if these were the corrected numbers, I know it was about 70 degrees and low humidity when he did the dyno runs. 5% smoothing on the graph.
vertC6 is offline  
Old 04-24-2018, 08:54 PM
  #16  
ssbowtie1
CF Senior Member
 
Member Since: Oct 2004
Location: SoCal
Posts: 458
Thanked 28 Times in 21 Posts
Default

Great build. Was this a cam motion cam? What did you set the lift at? Did you still run the YT rockers?
ssbowtie1 is offline  
Old 04-24-2018, 09:23 PM
  #17  
vertC6
CF Senior Member
Support Corvetteforum!
Thread Starter
 
vertC6's Avatar
 
Member Since: Aug 2004
Location: Houston Texas
Posts: 4,002
Thanked 41 Times in 30 Posts
Default

Yes cam motion, 224/240 115+4 .630/.612 and yes with the YTs and PSI1511 springs.
vertC6 is offline  
Old 04-25-2018, 07:56 AM
  #18  
Da Z06
CF Senior Member
 
Da Z06's Avatar
 
Member Since: Aug 2014
Location: TX
Posts: 802
Thanked 55 Times in 50 Posts
Default

Originally Posted by vertC6 View Post
I too have been in big cam cars before and I don't care for how the car behaves in everyday street driving. When you look at dyno graph's of bigger cams the suck down low and don't make power until 5k rpm.
Great results and glad you got the results you wanted out of your project.

In regards to your comments on the "big cam" I will have to politely disagree.

Attached is my dyno sheet. Fairly large cam with 27.5 degrees of overlap.

Makes at least 500RWHP by 4300 (earlier than your smaller cam), and makes at least your peak RWHP from 5300 and over 600 still by 7300.

Down low matches or exceeds your HP/TQ by 3000.

I would not say that a large cam with a well thought out combo is soft anywhere.

Congrats on your new combo, like you I went back and changed a few things!!
Attached Images  
Da Z06 is offline  
Old 04-25-2018, 01:39 PM
  #19  
vertC6
CF Senior Member
Support Corvetteforum!
Thread Starter
 
vertC6's Avatar
 
Member Since: Aug 2004
Location: Houston Texas
Posts: 4,002
Thanked 41 Times in 30 Posts
Default

Originally Posted by Da Z06 View Post
Great results and glad you got the results you wanted out of your project.

In regards to your comments on the "big cam" I will have to politely disagree.

Attached is my dyno sheet. Fairly large cam with 27.5 degrees of overlap.

Makes at least 500RWHP by 4300 (earlier than your smaller cam), and makes at least your peak RWHP from 5300 and over 600 still by 7300.

Down low matches or exceeds your HP/TQ by 3000.

I would not say that a large cam with a well thought out combo is soft anywhere.

Congrats on your new combo, like you I went back and changed a few things!!
That graph look great, are you running an MSD?

However, when you compare each graph you do make less power (mainly tq.) from 3k to 5k. You can clearly see the dip in torque at 4k. I am a little over 500 where you are at 460ish and we are pretty close to the same at 4.5k and you pull away at 5k.

On the hp we are the same at 3k but I jump 30rwhp at 4k rpm at 5k we are pretty even and then you take off from there with the scavenging effect.

I am sure there is not much difference in lag vs my car when actually driving on the street, but the smaller cam is stronger in the mid range. Thanks for posting!
vertC6 is offline  
Old 04-25-2018, 02:05 PM
  #20  
roastin300
CF Senior Member
 
Member Since: Jan 2014
Location: Rockledge, FL
Posts: 306
Thanked 10 Times in 8 Posts
Default

Example of a customer I have:

Guy was running a custom cam I put together and had ground for him (226/242). I then thoroughly tuned the vehicle to a perfect result everywhere. Car ran and drove beautifully and was running low 10's 1/4 mile (drag race guy).

He wanted more and I advised against it, but still spec'd out a new/bigger cam for him (246/258), kept lift the same, and lobe profiles were the same. I did my best to optimize a balance of the valve events between the 2 based on the difference in duration.

I am a professional tuner, and was able to get the big cam to behave reasonable on the street but not nearly as enjoyable to drive as the smaller cam.

The end result, the bigger cam made 25whp more at redline (7200rpm), but lost between 10-30 foot lbs of torque (this is HP here as well) almost everywhere below 5400 rpm. Went to the track and was consistently 3-4 tenths SLOWER.

I integrated the area under the HP and torque curves between 3000 and 7200 RPM and the smaller cam produced approximately 8% MORE.

Needless to say, we swapped the old cam back in because the car was faster and much easier and more enjoyable to drive on the street ha ha ha

Everyone is entitled to their own opinions though. I am just speaking from my experience (this is just 1 example).

Last edited by roastin300; 04-25-2018 at 02:06 PM.
roastin300 is offline  

Thread Tools
Search this Thread
Quick Reply: [Z06] I got the itch again, my build 2.0


Sponsored Ads
Vendor Directory

Contact Us Archive Advertising Cookie Policy Privacy Statement Terms of Service

© 2018 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: