Shifting @ 5000 but motor wants more.... - Team Camaro Tech
Troubleshooting Diagnosing problems done here.

 
LinkBack Thread Tools Display Modes
post #1 of 3 (permalink) Old Apr 27th, 03, 04:24 PM Thread Starter
Senior Tech
 
Join Date: Sep 2002
Posts: 166
Post

Hey Guy's,
I have a 355 mild built, MSD ignition, stock heads, 435, 454 cam, 9.5:1 flat top pistons, 650 Holley DP. mech. 2'ns, it's connected to an automatic TH 350 with a stock stall.
My problem is when I'm in drive and I nail the gas the car shifts at about 5000 rpm. It feels like the motor can pull more. So I manualy shifted it at around 6000 and the motor felt great, no valves floating, I think I even could of pushed it a tad more.
What is causing the motor to shift at 5000 and what could I do to make it shift at a higher RPM.
I'm thinking about Dynoing my car to see what the peak HP is so I don't go blowing the heads off the motor.
Thanks

[ 04-27-2003, 08:17 PM: Message edited by: SSupermanZ ]
SSupermanZ is offline  
Sponsored Links
Advertisement
 
post #2 of 3 (permalink) Old Apr 27th, 03, 06:20 PM
Senior Tech
 
Join Date: Mar 2002
Location: Austin, TX, USA
Posts: 5,277
Post

Two things determine shift - modulator pressure and govenor pressure. Altering either one will change the shift points. The most likely adjustment is to change the govenor. This usually consists of changing springs or grinding some off the weights. Problem is, the govenor will alter street shifts also. I don't know if this is undesirable or not, but beware.

The modulator adjustments will require valve body modifications of some sort. By tweaking the modulator, it's possible to get it to shift at 2500 or so when light-footing it, but give you the 6000 shift your looking for a WOT.

-dnult

Dave
========================
68 Coupe, 350 w/ Edelbrock Performer RPM heads, cam, intake, 700R4, Dave's small body HEI
dnult is offline  
post #3 of 3 (permalink) Old Apr 28th, 03, 04:39 PM
 
Join Date: Apr 2003
Location: lynnwood wa.
Posts: 3
Post

Dont know if you've checked out an adjustable modulator..their available at any parts house. Just a suggestion
topdropper69 is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Team Camaro Tech forums, you must first register.
Please enter your desired user 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.
NOTE we receive a lot of registrations with bad email addresses. IF you do not receive your confirmation email you will not be able to post. contact support and we will try and help.
Be sure you enter a valid email address and check your spam folder as well.



Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



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

 
For the best viewing experience please update your browser to Google Chrome