SBC 388 S/C Weiand 177 Help in Tuning - Page 2 - Hot Rod Forum : Hotrodders Bulletin Board
Hotrodders.com -- Hot Rod Forum



Register FAQ Search Today's Posts Unanswered Posts Auto Escrow Insurance Auto Loans
Hot Rod Forum : Hotrodders Bulletin Board > Tech Help> Engine
User Name
Password
lost password?   |   register now

Reply
 
LinkBack Thread Tools
  #16 (permalink)  
Old 04-20-2012, 11:43 AM
Registered User
 
Last photo:
Join Date: Apr 2012
Posts: 103
Wiki Edits: 0

Thanks: 15
Thanked 2 Times in 1 Post
Ok, i will measure all the stuff i have here, thanks for your help

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #17 (permalink)  
Old 04-20-2012, 11:50 AM
F-BIRD'88's Avatar
Yada Yada Yada
 
Last photo:
Join Date: Oct 2005
Location: Ontario, Canada
Posts: 9,153
Wiki Edits: 0

Thanks: 5
Thanked 380 Times in 374 Posts
Quote:
Originally Posted by TJ555
spark advance is only mechanical, not vacuum advance, i got all advance at 2500-2800rpm like 32, al sensor are above supercharger
this will not work. The sensor on the TBI body sees a vacuum when the blower is @ WOT pulling hard on the TBI.

The MAP sensor sees this as part throttle cruise engine operation, when the engine is actually WOT full power under boost.
It trims the fuel curve instead of increasing it.
It advances the timing instead of retarding it under boost.
( if it controls spark advance in any way.)
This EFI system is not roots blower motor friendly.
If it was, the MAP sensor would be on the intake manifold under the blower.
its not going to work right on a blower if its for a N/A engine.

The map sensor must be boost referenced just like a boost referenced power valve when using a carb on a blower motor.

Or a second "bypass" "boost" sensor on the manifold or a WOT throttle switch to by pass the false vacuum signal it is seeing at WOT.
Reply With Quote Quick reply to this message

Recent Engine posts with photos

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Hot Rod Forum : Hotrodders Bulletin Board forums, you must first register.
Please enter your desired user name (usually not your first and last name), your email address and other required details in the form below.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

Posting Rules
You may post new threads
You may 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 On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
weiand 177. anyone take one apart? homerj55 Engine 23 07-23-2011 03:07 PM
weiand 177 and water meth on sbc homerj55 Engine 19 06-08-2011 11:18 AM
weiand 177 vs 250 Roald Engine 11 06-02-2009 12:59 PM
355 SBC weiand 177 question rising68 Engine 7 08-14-2008 06:54 PM
400 SBC w/ 177 weiand..expected hp? Dr. Jeckel Engine 28 03-07-2007 07:00 PM


All times are GMT -6. The time now is 10:38 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0 PL2
Copyright Hotrodders.com 1999 - 2012. All Rights Reserved.