Z06 How my horsepower am I giving up with a .635 lift cam. - CorvetteForum - Chevrolet Corvette Forum Discussion



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

How my horsepower am I giving up with a .635 lift cam.

Reply
 
 
 
Thread Tools Search this Thread
Old 04-16-2018, 05:16 AM   #1  
lamboworld
CF Senior Member
Thread Starter
 
Member Since: Dec 2015
Location: Harrisburg NC
Posts: 611
Thanked 68 Times in 63 Posts
Default How my horsepower am I giving up with a .635 lift cam.

I am using a TSP custom cam and the I/E lift is .635". However, they do offer lobes that have lift of .655/.657 and I am wondering how much whp , if any, that I am giving up with the slightly lower lift on my current cam.

I am using AI ported heads. Here is some information that I found on their flow numbers.
Attached Images
  
lamboworld is offline   Reply With Quote
Old 04-16-2018, 07:34 AM   #2  
Schred86
CF Senior Member
 
Schred86's Avatar
 
Member Since: Sep 2015
Location: Ny
Posts: 360
Thanked 29 Times in 27 Posts
Default

I would guess 10-20 peak. But you might lose a little in the beginning of the power curve.
What is your power goal and main use for the car?
Schred86 is offline   Reply With Quote
Old 04-16-2018, 08:36 AM   #3  
BigVette427
CF Senior Member
 
BigVette427's Avatar
 
Member Since: Aug 2013
Location: Hill Country Texas
Posts: 632
Thanked 88 Times in 63 Posts
Default

I believe your duration and LSA will have more of a determining factor. Lots of LS7's out there with lifts < .650" who make plenty of power. If you're gains are so high in the RPM band that you rarely ever see anyways, you're not actually "realizing" those gains.
BigVette427 is offline   Reply With Quote
Old 04-16-2018, 09:09 AM   #4  
lamboworld
CF Senior Member
Thread Starter
 
Member Since: Dec 2015
Location: Harrisburg NC
Posts: 611
Thanked 68 Times in 63 Posts
Default

Quote:
Originally Posted by BigVette427 View Post
I believe your duration and LSA will have more of a determining factor. Lots of LS7's out there with lifts < .650" who make plenty of power. If you're gains are so high in the RPM band that you rarely ever see anyways, you're not actually "realizing" those gains.
My cam is pretty mild: 236/250 LSA 115+4

I am sure that I give up some peak whp with the +4 advance but I am not that familiar with how lift factor in whp numbers.

If I had this same same cam with a .655 lift, would I see any difference in mid range or peak whp and if so, approximately how much.
lamboworld is offline   Reply With Quote
Old 04-16-2018, 09:41 AM   #5  
PuckDracon
CF Member
 
PuckDracon's Avatar
 
Member Since: May 2007
Posts: 52
Thanked 17 Times in 14 Posts
Default

.02" more lift with the same duration and lobes would not be a big difference. That is not even as much lift difference as going from a 1.7 to 1.8 rocker on an early LS (LS7 is already 1.8).

I'd guess 5hp tops, if that? Definitely under 10hp.
PuckDracon is offline   Reply With Quote
Old 04-16-2018, 04:57 PM   #6  
Josh B.
CF Senior Member
 
Josh B.'s Avatar
 
Member Since: Nov 2014
Posts: 2,018
Thanked 320 Times in 248 Posts
Default

If I were using stock rockers I would just stay at .635" lift, engine longer valvetrain life, give up a couple hp
Josh B. is offline   Reply With Quote
Go Back   CorvetteForum - Chevrolet Corvette Forum Discussion >
Reload this Page
  • [Z06] How my horsepower am I giving up with a .635 lift cam.
  •  
     
    Reply


    Thread Tools Search this Thread
    Search this Thread:

    Click for Advanced Search

    Posting Rules
    You may not post new threads
    You may not post replies
    You may not post attachments
    You may not edit your posts

    BB code is On
    Smilies are On
    [IMG] code is On
    HTML code is Off
    Trackbacks are Off
    Pingbacks are Off
    Refbacks are Off

    Forum Jump

    Sponsored Ads
    Vendor Directory

    All times are GMT -4. The time now is 06:43 AM.


    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: