The 1947 - Present Chevrolet & GMC Truck Message Board Network







Register or Log In To remove these advertisements.

Go Back   The 1947 - Present Chevrolet & GMC Truck Message Board Network > 47 - Current classic GM Trucks > The 1960 - 1966 Chevrolet & GMC Pickups Message Board

Web 67-72chevytrucks.com


Reply
 
Thread Tools Display Modes
Old 02-15-2011, 05:40 PM   #1
tj62
Registered User
 
Join Date: Nov 2009
Location: Murfreesboro, TN
Posts: 72
Timing, dwell, RPM '62 235?

With the weather warming up, I'm getting out and working on my 62 236 I6 and after getting it running last year, I'm trying to fine tune it this year. Its not rolling yet due to trans probs, but the engine is doing well.

When I give it gas slowly, it will rev fine, but if I try to hit it quickly, it sounds like it bogs down and can't keep up. My dad said check the timing, so working on that, but in the mean time, have adjusted the points and using a dwell/tachometer trying to get the points and carb set before adjusting the timing with the distributor (either advancing or retarding as needed ).

I've looked everywhere and so far the only info I can find is on 235's in other cars, like an impala. Here's the stats

dwell 28-32

RPM at idle 500 ( this seems really low, its at about 1000 right now and when I turned it down to 500 it nearly died and I couldn't give it any gas without it just about dying.

Timing: 5 before TDC (is this right at idle?)

Is it really tricky to drop in a new, electronic distributor so I don't have to mess with the points anymore? I read that I can get an old one off a late 70s model and it would "drop right in" with some light rewiring, but not sure.

I noticed the distributor does advance some when revving, but then backs off as it bogs down, when I rotate it fully counter clockwise and rev it, it does better and if rotated clockwise, it nearly dies at idle.

Are those figures above correct?

Any ideas whether its timing, dwell, RPM's or what's causing the lagging so bad? Thanks, I know its a lot of info.
tj62 is offline   Reply With Quote
Old 03-17-2011, 11:38 AM   #2
Ghostwhite
Squarebody guy
 
Ghostwhite's Avatar
 
Join Date: Apr 2009
Location: Minnesota
Posts: 335
Re: Timing, dwell, RPM '62 235?

Having the same issues with my 62, I can get the timing right.
Ghostwhite is offline   Reply With Quote
Old 03-17-2011, 06:18 PM   #3
steve'62
Registered User
 
steve'62's Avatar
 
Join Date: Feb 2011
Location: Goodyear,az
Posts: 251
Re: Timing, dwell, RPM '62 235?

I was having the same problem with mine but I reset the dwell then the timing with the light and then the carb, much better throttle response. Really make sure its on the top of the lobe before you set te gap. I set mine at .18
steve'62 is offline   Reply With Quote
Reply

Bookmarks


Posting Rules
You may not post new threads
You may not 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

Forum Jump


All times are GMT -4. The time now is 02:41 AM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Copyright 1997-2022 67-72chevytrucks.com