Anyway to calculate vacuum from camshaft overlap? - Page 2 - LS1TECH



Generation III Internal Engine 1997-2006 LS1 | LS6
Sponsored by:
Sponsored by:

Anyway to calculate vacuum from camshaft overlap?

Reply
 
Thread Tools Search this Thread
Old 03-19-2017, 06:14 PM   #21
Super Hulk Smash
Thread Starter
iTrader: (7)
 
JakeFusion's Avatar
 
Join Date: Aug 2004
Location: Pace, FL
Posts: 9,361
Default

If it'll idle at 60-65kPa at 1000RPM, then it'd be a very interesting combo...

And yeah, I'd definitely run it with nitrous. The 4C I'm restalling to would work with that.
JakeFusion is online now   Reply With Quote
Old 03-19-2017, 08:19 PM   #22
TECH Addict
 
Tuskyz28's Avatar
 
Join Date: Sep 2014
Posts: 2,106
Default

I'm quite sure with the correct cam specs it will idle fine. Pat G knows how to nail the overlap deal perfect..... I wonder myself how critical the lobe separation angle is on the vacuum situation
Tuskyz28 is online now   Reply With Quote
Old 03-19-2017, 08:39 PM   #23
TECH Enthusiast
iTrader: (3)
 
64post's Avatar
 
Join Date: Nov 2011
Location: Sonoma Co. Ca.
Posts: 582
Default

Quote:
Originally Posted by Tuskyz28 View Post
If I was go do a hydraulic roller motor with a Fast 102 I see no need for a square port cylinder head for a 402-418ci setup.

Me personally I would do a set of Tooley 245 heads rubbed over with the intake ported to match then a badass setup from nitrous outlet if I was go spray. Maybe even a direct port nitrous setup.

Plenty of cars running 9s and 10s on motor with a Fast intake and hydraulic roller with cathedral heads 205cc-245cc intake runner.
I kind of agree with that. Switching to Square port LS3/7 style heads has cost factors like complete rocker setups and a new manifold when larger cathederal 235 and up will do the job, that's kind of how I"m leaning anyway. Though TFS's site says 4.125" or bigger bore for their large cathedral heads

Last edited by 64post; 03-20-2017 at 11:17 AM.
64post is online now   Reply With Quote
Old 03-19-2017, 08:47 PM   #24
TECH Addict
 
Tuskyz28's Avatar
 
Join Date: Sep 2014
Posts: 2,106
Default

64post- I asked Brian Tooley maybe a year ago about the 235 vs 245.... basically said the 245 is the way to go even on a 4.000 bore engine. The 245 head gives you room to grow he said.
235cc is 2.08 intake valve vs the 245cc head is 2.10 intake valve.... not a big difference between the two on paper.
Tuskyz28 is online now   Reply With Quote
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Anyway to calculate vacuum from camshaft overlap? JakeFusion Advanced Engineering Tech 8 03-16-2017 04:36 PM
Vacuum operated heater control valve jchevy Conversions & Hybrids 4 09-05-2016 08:43 PM
A lot of Horsepower and Vacuum Pump? dreamls1 Forced Induction 8 05-25-2011 05:06 PM
Vacuum leak 95BlkBird LT1-LT4 Modifications 6 07-06-2010 10:41 AM
Dynamic Cylinder Air Chat Another_User PCM Diagnostics & Tuning 67 05-29-2005 07:20 AM


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 09:34 AM.


 
  • Ask a Question
    Get answers from community experts
What's your question?
Send