Updated Valve event / DCR / SCR / Header length spreadsheet - Page 2 - LS1TECH - Camaro and Firebird Forum Discussion



Advanced Engineering Tech For the more hardcore LS1TECH residents
Sponsored by:
Sponsored by:

Updated Valve event / DCR / SCR / Header length spreadsheet

Reply
 
Thread Tools Search this Thread
Old 05-19-2006, 03:51 PM   #21
TECH Addict
iTrader: (11)
 
No Juice's Avatar
 
Join Date: Jan 2003
Location: Minnesota Corn Fields
Posts: 2,322
Default

Quote:
Originally Posted by matts22
Great stuff guys...

I did notice a problem though. When you go under the tab "Compare DCR" there is no formula in cells B42 and G42, clearance volume. This should be the same as in B42 of the "DCR" tab, which is =SUM(0.7853982*(B17^2)*B21) (and for the G column, just substitute G for B in that formula.

If this isn't fixed, it will throw off the SCR and DCR values in this tab.

Also found that ICA uses column B as well. Should be G



What are we looking for when comparing cams using the same heads. I know we want a DCR close to 8.5, but what else?
No Juice is offline   Reply With Quote
Old 05-22-2006, 06:33 AM   #22
6600 rpm clutch dump of death Administrator
Thread Starter
 
J-Rod's Avatar
 
Join Date: Dec 2001
Location: Texas
Posts: 4,956
Default

Fixed the two issues above. If you find anything else, or want to see stuff added, let me know.
J-Rod is offline   Reply With Quote
Old 05-22-2006, 07:47 PM   #23
TECH Senior Member
 
joecar's Avatar
 
Join Date: Apr 2002
Location: So.Cal.
Posts: 5,785
Default

Good work, thanks for the effort.

Comment: the "Piston Speed" is actually "Mean Piston Speed".
joecar is offline   Reply With Quote
Old 06-25-2006, 01:47 AM   #24
11 Second Club
 
Join Date: Feb 2002
Location: Norcal
Posts: 638
Default

Do you have to have Excell to run this?
Spellbound is offline   Reply With Quote
Old 07-20-2006, 03:31 PM   #25
Moderator
iTrader: (4)
 
davered00ss's Avatar
 
Join Date: Nov 2003
Location: Plainfield, CT
Posts: 10,520
Default

Will not work for me.
davered00ss is offline   Reply With Quote
Old 07-21-2006, 01:08 PM   #26
6600 rpm clutch dump of death Administrator
Thread Starter
 
J-Rod's Avatar
 
Join Date: Dec 2001
Location: Texas
Posts: 4,956
Default

What doesn't work. You can't download it, or what?
J-Rod is offline   Reply With Quote
Old 07-31-2006, 08:23 PM   #27
TECH Regular
 
Join Date: Oct 2005
Posts: 430
Default

Hi J-Rod.
This did everything I wanted some months back, so maybe I'm just looking for something different now. All I want is to look at various DCRs vs. SCR and IVC. All that the speadsheet should need is stroke, rod length, SCR and IVC @ 0.006", 0.050" or 0.200" to do this. How do I skip over the other couple of dozen specs? For example, do I have to 'invent' an intake cam duration and ICL to get the desired IVC to appear in the box, or...? Ditto how/where can I enter the SCR I want to use without having to create it from a handfull of volumes plus the engine bore & stroke?

Thanks.
-MB
MadBill is offline   Reply With Quote
Old 10-27-2006, 04:59 PM   #28
9 Second Club
iTrader: (47)
 
The stunningman's Avatar
 
Join Date: Aug 2006
Posts: 760
Default

Quote:
Originally Posted by davered00ss
Will not work for me.
Ditto I can't get it to open It sends me to another D/L board(?) where I can't figure out what to do.
The stunningman is offline   Reply With Quote
Old 11-02-2006, 10:11 PM   #29
11 Second Club
iTrader: (5)
 
Keenov's Avatar
 
Join Date: Mar 2004
Location: Virginia Beach, VA
Posts: 1,335
Default

Quote:
Originally Posted by The stunningman
Ditto I can't get it to open It sends me to another D/L board(?) where I can't figure out what to do.
Try to just right click and save as. Works fine here.
Keenov is offline   Reply With Quote
Old 11-30-2006, 06:23 AM   #30
UNDER PRESSURE MOD
iTrader: (19)
 
The Alchemist's Avatar
 
Join Date: Nov 2001
Location: Doylestown PA
Posts: 10,754
Default

Is the server down? I tried to right click and save and I get an error about the server being down or unrecognized.

I'm trying to calculate my dcr and scr change from going from a stock 0.056" gasket to a 0.040" gasket.

Thanks.
The Alchemist is offline   Reply With Quote
Old 12-17-2006, 04:14 PM   #31
TECH Regular
iTrader: (16)
 
fast98's Avatar
 
Join Date: Jun 2004
Location: michigan
Posts: 483
Default

i have been noticing theres a problem with the calculation of scr, and if you look under head gasket volume thats where the problem is its way lower than it should be, so i clicked on it and it says inconsistent formula.
fast98 is offline   Reply With Quote
Old 12-18-2006, 12:35 AM   #32
6600 rpm clutch dump of death Administrator
Thread Starter
 
J-Rod's Avatar
 
Join Date: Dec 2001
Location: Texas
Posts: 4,956
Default

Sorry, EV1 is no longer hosting. So, i need to move it. I'll look at the SCR while I'm at it...
J-Rod is offline   Reply With Quote
Old 01-22-2007, 11:12 PM   #33
12 Second Club
 
cowboysfan's Avatar
 
Join Date: Mar 2005
Location: Corpus Christi
Posts: 1,498
Default

wil this be up any time soon. clicked on it and said "BAD GATEWAY".




fuerzaws6
cowboysfan is offline   Reply With Quote
Old 01-23-2007, 09:49 AM   #34
6600 rpm clutch dump of death Administrator
Thread Starter
 
J-Rod's Avatar
 
Join Date: Dec 2001
Location: Texas
Posts: 4,956
Default

Until I can get a new site to host it on use this one... I am uploading it in .zip format.
Attached Files
File Type: zip VE Calculator.zip (15.1 KB, 444 views)

Last edited by J-Rod; 07-06-2009 at 08:28 AM.
J-Rod is offline   Reply With Quote
Old 05-01-2007, 12:03 PM   #35
TECH Fanatic
 
SideStep's Avatar
 
Join Date: Mar 2003
Posts: 1,935
Default

Let me make sure I using this spreadsheet correctly:

If my pistons are .007 above the deck of the block (sticking out) I enter that as -.007 in the spreadsheet, Right??? Not as a positive value, because you are calculating how much of the gasket/chamber volume the piston is taking up...???

For example: ( the below would should pistons sticking-out of the block by .007)

Bore______________________________________4
ST = Stroke_______________________________3.622
RL = Rod Length____________________________6.098
Number of cylinders_________________________8
Deck Height_______________________________-0.007
Piston Dome or Dish (- for a dome + for a dish)__0
Compressed Head gasket thickness____________0.06
Cylinder Head Chamber Volume________________64


???

Last edited by SideStep; 05-01-2007 at 12:31 PM.
SideStep is offline   Reply With Quote
Old 05-06-2007, 06:12 PM   #36
TECH Enthusiast
iTrader: (3)
 
slowride's Avatar
 
Join Date: May 2006
Location: Waterloo, IA
Posts: 558
Default

Yes, Just think of it in the same way as the piston dish/dome.
slowride is offline   Reply With Quote
Old 05-31-2007, 07:58 PM   #37
12 Second Club
 
Gannet's Avatar
 
Join Date: Mar 2006
Location: Sarasota, FL
Posts: 302
Default

Is there any reason the sheet does not consider top ring volume? Or is that hidden somewhere I haven't seen it?

Adding it to my version of the sheet, I get a stock SCR for an LS-1 of 10.13 as opposed to 10.31 without it. That's assuming a top ring down distance of 0.250", which seemed a reasonable number. I don't have the actual stock dimension, does anyone?
Gannet is offline   Reply With Quote
Old 06-09-2007, 09:11 AM   #38
TECH Enthusiast
iTrader: (3)
 
slowride's Avatar
 
Join Date: May 2006
Location: Waterloo, IA
Posts: 558
Default

I take it was omitted as to error in the direction of safety. I would think over time a little carbon is going to build up somewhere in the chamber increasing compression ever so slightly. So having a little cushion is fine with me.
slowride is offline   Reply With Quote
Old 08-13-2007, 10:33 PM   #39
Teching In
iTrader: (4)
 
Join Date: Oct 2005
Posts: 32
Default

This spreadsheet gives out fairly high dynamic compression numbers... A stock LS1 with the 230+ degree duration cam gives me very close to 8.5:1 dynamic. Correct me if I am wrong but that is a said "limit" for pump gas, which would not make sense with a cam that big on a stock SCR LS1.
SySt666 is offline   Reply With Quote
Old 09-07-2007, 01:02 PM   #40
LS1 Tech Administrator
iTrader: (14)
 
Patrick G's Avatar
 
Join Date: Nov 2001
Location: Victoria, TX
Posts: 8,238
Default

Quote:
Originally Posted by SySt666
This spreadsheet gives out fairly high dynamic compression numbers... A stock LS1 with the 230+ degree duration cam gives me very close to 8.5:1 dynamic. Correct me if I am wrong but that is a said "limit" for pump gas, which would not make sense with a cam that big on a stock SCR LS1.
You must not be entering the correct duration at .006" for the 230 @ .050" cam. Most aggressive LS1 cam 230 lobes have between 279-282 degrees duration at .006". Are you using numbers in that range at .006"?
Patrick G is offline   Reply With Quote
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
What's The Best DCR SCR Calculator? Greg_E Generation III Internal Engine 6 01-18-2014 03:09 PM
Opinions on DCR and SCR mamead Generation III Internal Engine 34 03-13-2011 10:52 PM
IVC calculation haacer LT1-LT4 Modifications 2 07-14-2009 04:00 PM
Intake Manifold Runner lenght Calculations sheet 11sHSV Advanced Engineering Tech 4 02-25-2007 06:15 AM
Modified & Simplified VE Calculator! - I need some input! pianoprodigy Generation III Internal Engine 50 11-01-2006 09:49 AM


Tags
bogart, calculations, calculator, calulator, cam, camshaft, d10, dcr, event, events, fbody, som, spreadsheet, timing, valve

Thread Tools Search this Thread
Search this Thread:

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



All times are GMT -5. The time now is 01:37 PM.


 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: