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 1967 - 1972 Chevrolet & GMC Pickups Message Board

Web 67-72chevytrucks.com


Reply
 
Thread Tools Display Modes
Old 06-09-2016, 06:49 AM   #1
1969guy
Senior Member
 
Join Date: Mar 2012
Location: Royston, Ga
Posts: 625
Re: Pinging after 40-45 mins of driving?

If you haven't done this already, summit racing has a compression calculator you could try. As long as you know how many cc's, or close estimation, your Pistons add to the compression chamber and how many cc's your heads are, you can get a close estimation of compression.


http://www.summitracing.com/expertad...ion-calculator
__________________
Evan

- 1969 C10 LWB fltsd 307 3spd man.steer 3.73 rear orig.white/turquoise poly with drk turquoise int
- 1972 Custom Deluxe10 LWB fltsd 350/TH350 pwr. steer/brks A/C 3.07posi rr orig.med blue with blue cloth trim.
1969guy is offline   Reply With Quote
Old 06-09-2016, 07:00 AM   #2
Grumpy old man
Senior Member
 
Grumpy old man's Avatar
 
Join Date: Dec 2013
Location: Gods country East,Tn
Posts: 8,545
Re: Pinging after 40-45 mins of driving?

After all you've been thru with this engine I'll bet a donut that a crate 383 is looking really good right about now ?
__________________

1967 Factory short bed - Old school
'71 - 350 / 4bolt / 487 heads / Edelbrock C3BX
Muncie M-22 4 speed / Hurst Comp plus
Factory 12 bolt posi 3.73 / 255-70-15
Smoothed firewall / Factory cowl induction
Power disc brakes / power steering / 3.5-5" drop
Grumpy old man is offline   Reply With Quote
Old 06-09-2016, 11:07 AM   #3
Mrturner1
Registered User
 
Join Date: Nov 2015
Location: Colfax California
Posts: 1,644
Re: Pinging after 40-45 mins of driving?

Quote:
Originally Posted by Grumpy old man View Post
After all you've been thru with this engine I'll bet a donut that a crate 383 is looking really good right about now ?
It is haha I'm actually going to build an all forged 383 from the bottom up, then throw a bunch of boost at it.
Mrturner1 is offline   Reply With Quote
Old 06-09-2016, 11:17 AM   #4
Mrturner1
Registered User
 
Join Date: Nov 2015
Location: Colfax California
Posts: 1,644
Re: Pinging after 40-45 mins of driving?

Well I was off a little on the compression, so that might be part of it lol
Attached Images
 
Mrturner1 is offline   Reply With Quote
Old 06-09-2016, 12:00 PM   #5
1969guy
Senior Member
 
Join Date: Mar 2012
Location: Royston, Ga
Posts: 625
Re: Pinging after 40-45 mins of driving?

Yea you definately need to run 4 to 5 gallons of race fuel per tank. According to the chart I looked at 11:1 compression needs atleast 96 octane and 12:1 needs
atleast 100 octane, so you should try to get between them.

How much does it cost there? Costs me $10 a gallon at the pump. Trying to get it wholesale though.
__________________
Evan

- 1969 C10 LWB fltsd 307 3spd man.steer 3.73 rear orig.white/turquoise poly with drk turquoise int
- 1972 Custom Deluxe10 LWB fltsd 350/TH350 pwr. steer/brks A/C 3.07posi rr orig.med blue with blue cloth trim.
1969guy is offline   Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

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 05:36 AM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2025, vBulletin Solutions Inc.
Copyright 1997-2025 67-72chevytrucks.com