Notices
S-10 & Blazer 1982-2005
The S-10 and Blazer was arguably the most versatile and accessorizable mid-size truck and SUV on the market.
Platform: S/T-series & GMT 330

tbi to carb 4.3

Old April 14th, 2019, 4:07 PM
  #41  
CF Junior Member
Thread Starter
 
Join Date: Mar 2019
Posts: 41
Likes: 0
Received 0 Likes on 0 Posts
Default

i got rid of the tbi because i wanted an old school truck, no sensors, no computer, thats what i have now, i have been looking for an s10 for about 3 years with a small v8 auto trans, but every one that i found was built to be a hotrod, and i dont want that so i decided to fix my own and after several told me that the 4.3 was a good engine and that it could be converted to a carb without all the other stuff, i didnt see any sense in pulling the motor and trans out. its running perfectly, the timing is advancing, the auto choke is working properly, i dont see any issues .
charlie2sods is offline  
Old April 14th, 2019, 5:42 PM
  #42  
I'm here for the party
 
Irish_alley's Avatar
 
Join Date: Feb 2019
Location: Maryland
Posts: 828
Likes: 0
Received 3 Likes on 3 Posts
Default

alright im going to post this last thing
Ignition Timing for First-Generation GM V-8 Engines

it was written by a guy i know and hes one of the select few that i trust if i couldnt work on it myself
Irish_alley is offline  
Old April 14th, 2019, 7:28 PM
  #43  
CF Junior Member
Thread Starter
 
Join Date: Mar 2019
Posts: 41
Likes: 0
Received 0 Likes on 0 Posts
Default

im reading the artice you posted, and i am working off port vacuum, he indicates working off the intake vacuum is better im going to have to spend some time with this to understand and try to get it right.
charlie2sods is offline  
Old April 14th, 2019, 8:47 PM
  #44  
I'm here for the party
 
Irish_alley's Avatar
 
Join Date: Feb 2019
Location: Maryland
Posts: 828
Likes: 0
Received 3 Likes on 3 Posts
Default

thats what i was trying to tell you, ported is better for emissions while manifold is better for performance. but also notice he never mentions anything about the vacuum advance getting too much vacuum. some are adjustable but thats to adjust the advance not the vacuum, then you have the counter weights. regardless on what you do with the information, good luck and dont be afraid to ask.
Irish_alley is offline  
Old April 15th, 2019, 2:18 AM
  #45  
CF Veteran
 
oilcanhenry's Avatar
 
Join Date: Oct 2017
Location: USA
Posts: 1,545
Likes: 0
Received 0 Likes on 0 Posts
Default

Originally Posted by charlie2sods View Post
i dont have a vacuum leak, i have checked everything, two mechanics told me i would have to restrict the vacuum going to the distributor, i questioned that both of them are long time mechanics, but after i did what they said it solved my issues, thats all i know.
Back in the 1970s lots of vehicles had a vacuum line device that slowed down the speed of the advance. It was nothing more then an early SMOG control device. I wonder if your vacuum advance diaphragm is somehow adjusted to work with this device?
oilcanhenry is offline  
Old April 15th, 2019, 6:36 AM
  #46  
CF Junior Member
Thread Starter
 
Join Date: Mar 2019
Posts: 41
Likes: 0
Received 0 Likes on 0 Posts
Default

thanks for the response and the help, i am beginning to understand your point now,
charlie2sods is offline  
Old April 15th, 2019, 6:41 AM
  #47  
CF Junior Member
Thread Starter
 
Join Date: Mar 2019
Posts: 41
Likes: 0
Received 0 Likes on 0 Posts
Default

the distributor i have is a new hei with the coil built on top, and putting it on this 4.3 s10 there is no extra room, I got it in and working but there is no excess space. as i have said recently i have done away with all sensors and the computer, which is what i have wanted for years now, an old school truck that i can understand and work on, i am going to work with the timing and the carb as irish alley suggested.
charlie2sods is offline  
Old April 18th, 2019, 10:15 AM
  #48  
I'm here for the party
 
Irish_alley's Avatar
 
Join Date: Feb 2019
Location: Maryland
Posts: 828
Likes: 0
Received 3 Likes on 3 Posts
Default

charlie got a question about the fitting from the fish tank. is it a ball valve in the sense that its adjustable to limit the air flow?
Irish_alley is offline  
Old April 24th, 2019, 6:29 PM
  #49  
CF Junior Member
Thread Starter
 
Join Date: Mar 2019
Posts: 41
Likes: 0
Received 0 Likes on 0 Posts
Default

yes it limits the air flow, there is a plastic plug mounted on the side of the plastic box the ac coil is mounted in under the hood, it has 4 plugs 4 wires and gray in color would you know right off hand what that is, thanks
charlie2sods is offline  
Old April 24th, 2019, 8:07 PM
  #50  
I'm here for the party
 
Irish_alley's Avatar
 
Join Date: Feb 2019
Location: Maryland
Posts: 828
Likes: 0
Received 3 Likes on 3 Posts
Default

can you take a picture?
Irish_alley is offline  

Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: