ForumsBasic TrainingOnline Maintenance ManualsThe M715 Zone Vin RegistryVPW's M715 Parts ListGalleriesLinks

Go Back   M715 Zone > General Tech > Modified Tech > Modified Tech Archives

 
 
Thread Tools Display Modes
  #1  
Old January 8th, 2004, 06:12 PM
bumnog bumnog is offline
Civilian
 
Join Date: Jan 2004
Location: Iowa
Posts: 6
bumnog is a Soldier
Default

Just wondering how to go about selecting spring and weight setup, base and total timing? Also the vacuum port setup? I have tried different setups and can't quite get it right. It seems doggy on the low end.
  #2  
Old January 8th, 2004, 07:00 PM
SCkaiser67 SCkaiser67 is offline
New Recruit
 
Join Date: Jan 2004
Posts: 13
SCkaiser67 is an Observer
Default 350 timing

Lighter than stock springs will get you out of the hole quicker, 8 deg initial is good to start with. check your total with a good light that you can tune. shouldn't be more than 34 on a decent built motor. Some people advance it at about 4000rpm till it pings then back it off a bit. Problem with getting all the advance you can is overheating. let me know how it works.
  #3  
Old January 8th, 2004, 10:06 PM
bumnog bumnog is offline
Civilian
 
Join Date: Jan 2004
Location: Iowa
Posts: 6
bumnog is a Soldier
Default

The mods include Trick flow heads, scat crank, Eagle SIR rods, TRW forged pistons 9.73 to 1 comp, port matched Edelbrock EPS intake and 600 carb, 1.6 roller rockers, Crane 4x4 cam. Trick flow said 36 to 38 deg. but it seems to run worse there. My timing light has advance on it but I am starting to wonder about it. With the vac unhooked and about 4500rpm I am at 36 and when I hook up the vac it goes up 15deg. To me I would think that it would knock like a sob. I know alot of guys unhook the vac but have trouble starting.
  #4  
Old January 9th, 2004, 08:45 AM
Brian Sisson Brian Sisson is offline
Private
 
Join Date: Dec 2003
Location: Memphis, Tn
Posts: 143
Brian Sisson is a Soldier
Default

You need to have about 36* TOTAL by 2500 rpm. That includes your vacuum, and your mechanical in addition to whatever your initial is. Don't bother with the advance on the light- just hook it all up and then check it. It may sound better timed at about 14* or so when ideling, but that much timing will crack your heads. With a motor built like that it's not gonna sound so smooth on idle and will be tough to get right by ear.

I have a 350 with similar components- only stock big valve heads. I run an Edelbrock 600 on mine and the HEI dizzy. I tried the advance curve kit and found that it gave me crappy results too. It seemed that no matter which springs I stuck on there it didn't give me the power in low-end that my stock springs did and as such I run them now. I have 11* initial (with the vacuum hooked up, but hooked to ported vacuum) and then at 2500 rpm it jumps up to about 34* with all the timing in.

Hope this helps.....and hope that the guys who know more than me pipe up and correct my errors.
-B.
 

Thread Tools
Display Modes

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 On

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
timing light CHRIS UNGER Open Discussion 6 May 15th, 2011 05:02 PM
jfnemt1ff1 : Timing PseudoZone PseudoZone - Open Archive 3 November 11th, 2009 01:02 AM
A Matter of Timing Barrman Open Discussion 2 March 13th, 2009 09:19 PM
m-715 timing set phcarr Stock Tech 2 September 25th, 2007 02:38 PM


All times are GMT -7. The time now is 03:59 AM.

 

Powered by vBulletin® Version 3.8.9
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
1998 - 2019


This site is owned and operated by:
M715 Zone, LLC
President: Jon Schmidt, User ID=brute4c
If you have any suggestions, comments, problems or questions, contact:  brute4c@m715zone.com

Use of this site means you understand and agree to our TERMS OF USE

Copyright Notice:
This web site is subject to the protection of the copyright laws of the United States and other countries. Except for Personal Use Only, you may not modify, copy, distribute, transmit, display, perform, reproduce, publish, license, create derivative works from, transfer, or sell any information obtained from any part of the M715 Zone website without the prior written permission of M715 Zone, LLC.

Written permission can only be obtained by contacting
brute4c@m715zone.com

Copyright 1998-2019