383 timing with 6" rods - Team Camaro Tech
Engine General Engine Discussion.

 
LinkBack Thread Tools Display Modes
post #1 of 5 (permalink) Old Apr 23rd, 04, 07:46 PM Thread Starter
 
Join Date: Aug 2001
Posts: 409
Post

Just curious, I did a search and didt find any info about a 5.7" rod 383 vs a 6" for timing. My 383 runs fine with 14 initial 32 total but runs stronger with 18 initial and 36 total. I just keep it at lower timing to avoid detonation. Could it be the 6" rods make my engine the exception to the 32-34 rule for 383s? I know the stroke of the 383 over the 350 increases piston speed. Which is mainly why it needs less timing, but with the longer rods doesnt it slow the piston down a bit? Just curious to hear any info on this.
nitrous383 is offline  
Sponsored Links
Advertisement
 
post #2 of 5 (permalink) Old Apr 24th, 04, 09:11 AM
Gold Lifetime Member
Mike
 
Join Date: Apr 2002
Location: Walla Walla, WA
Posts: 4,293
Post

On the dyno my 383 with 6" rods was happiest with 34 degrees total advance.

Mike - '68 Camaro with lots of stuff done to it.


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Mkelcy is offline  
post #3 of 5 (permalink) Old Apr 24th, 04, 10:02 AM
Senior Tech
 
Join Date: Jan 2001
Location: skiatook, ok
Posts: 3,692
Post

It is possible it would wrong strongest with 18* initial and 32* total. A few dyno runs or drag strip passes is the only way to know for sure. But either way, your in the ballpark.

"This is not a cheerocracy...I make the cheercisions around here"
travis is offline  
 
post #4 of 5 (permalink) Old Apr 24th, 04, 01:56 PM
Senior Tech
Eric
 
Join Date: Dec 2000
Location: Kentwood, MI
Posts: 8,097
Post

If you test it at the track look at your MPH to find best timing, not ET.

Combustion chamber shape has more to do with how much timing an engine likes than rod length.

E85 racer and E85 carb builder

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.


68 Camaro, E85 powered 427" small block. 9.96 @ 133 MPH, 1.319 sixty foot on motor. 5.92 eighth @ 116 with a 1.42 sixty breaking beams with back tire on the bottle
Eric68 is offline  
post #5 of 5 (permalink) Old Apr 24th, 04, 02:07 PM
Senior Tech
Carl
 
Join Date: Apr 1999
Location: La La Land, CA
Posts: 2,707
Post

I agree with Eric, the cumbustion chamber has much more to do with timing requirements than rod length, in this case.

Mine is happiest with 31-32* total, 16 initial with 10 added using manifold vacuum, as tested on a chassis dyno.

Most aftermarket heads work well with 34-36* total. The Vortec style combustion chamber (not the E-tec) works with a few degrees less.

If you have a true 11.2:1 compression ratio detonation may be hard to avoid depending upon the camshaft. A DCR would be a good check.


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
CarlC 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