A question on leaded gas - Team Camaro Tech
Tech 2000 Our previous General Forum
Replies ONLY - no new topics.

 
LinkBack Thread Tools Display Modes
post #1 of 7 (permalink) Old Apr 30th, 01, 07:10 AM Thread Starter
Senior Tech
 
Join Date: Mar 2001
Location: Niceville Fl
Posts: 1,070
Post

I have a mild 355 ci with about 9.5-1 and I was wondering if I would see a differance if I put a lead additive to my gas when i fill up? It has a 650 elelbrock carb and a mild cam. Will lead hurt the motor?
69CamaroRacer is offline  
Sponsored Links
Advertisement
 
post #2 of 7 (permalink) Old May 1st, 01, 05:46 AM
 
Join Date: Apr 2001
Location: Yakima, WA 98908
Posts: 28
Post

As far as I know, lead will not hurt your car. It also won't help much. The only possible help would be if you did not have hardend seats in the heads. One of the functions for the Lead was as a lube for the valves.
NOMANRS is offline  
post #3 of 7 (permalink) Old May 1st, 01, 10:35 AM
Senior Tech
 
Join Date: Dec 2000
Location: Monroe, WA, USA
Posts: 312
Post

leaded gas is also better at stoping knocking and pinging. it will not hurt your motor.
ilbl8 is offline  
 
post #4 of 7 (permalink) Old May 1st, 01, 01:34 PM
Senior Tech
John
 
JohnZ's Avatar
 
Join Date: Sep 2000
Location: Washington, Michigan USA
Posts: 7,728
Post

Complete waste of time and money for your setup - don't bother - won't help anything except the guy's wallet who sells it.

------------------
JohnZ
'69 Z28 Fathom Green
JohnZ is offline  
post #5 of 7 (permalink) Old May 1st, 01, 05:08 PM Thread Starter
Senior Tech
 
Join Date: Mar 2001
Location: Niceville Fl
Posts: 1,070
Post

thanks for all the advise guys
69CamaroRacer is offline  
post #6 of 7 (permalink) Old May 2nd, 01, 06:51 AM
Senior Tech
 
Join Date: Jul 1999
Location: Balto.,Md
Posts: 188
Talking

Its all in your head, literally. If you have a non stock head with hardened seats you dont need it. With the stock heads you may get valve seat regression over time without lead or a lead substitute. I always use a lead substitute in mine just to be safe.

------------------
1970 mostly original
307,TH350
F41
bowtie-70 is offline  
post #7 of 7 (permalink) Old May 2nd, 01, 05:20 PM
Senior Tech
 
Join Date: Mar 2001
Location: Tucson, AZ, USA
Posts: 122
Post

The 9.5 to 1 depends on the cam and the quench area...if your quench area is .08" or bigger, your swirl and turbulance is in trouble and so is the burn rate and thus flame travel...this promotes detonation...
Choosing a proper cam as well as using aluminum heads as well as maintaining as small a quench area .04" is good...will all help keep detonation from occuring..
NOW..you CAN make more power with higher octance.... With higher octane, it allows you to get more over-all advance and allows you to re-set the distributor curve...thus pulling in more torque when it's needed...
Newer cars with computer control have a knock sensor in the block which signal the computer to RETARD(pull-back) the timing..thus loosing some low end torque..So using a higher octance doesn't ADD power..it allows the motor to be at it's best without reducing the timing due to detonation.. Lower compression motors generaly make MORE heat than higher compression, the lead in the fuel is to help the exhaust valve better disipate the heat..this helps prevent the seat from getting soft from too much heat..which leads to the seat dropping into the head from the pounding of the valve..
Also note that the LEADED fuel WILL cause permenant damage to the catalytic converter..
CHEERS
Chris

cerrem 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 not 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