HOME FORUM RULES CONTACT
     
   
   

Go Back   CLASS RACER FORUM > Class Racer Forums > Bracket Racing


Reply
 
Thread Tools Display Modes
Old 04-07-2019, 11:09 PM   #1
67champ
Junior Member
 
Join Date: Feb 2002
Location: Ohio
Posts: 43
Likes: 4
Liked 1 Time in 1 Post
Default Mechanical Throttle Stop Adjustment - Question

Does anyone have experience with how much adjustment is needed to start effecting ET? So, today I got some testing done and either I have a issue with the car or I need to adjust T-stop out more to start effecting things... Overview of today: Basically, I made six 1/4 mile runs today between 1pm and 4pm. Three runs were all out (T-stop not hitting carb linkage) and three runs with T-stop adjusted out 5-6 complete turns out after initially touching carb linkage. The problem was the runs at full throttle were SLOWER than when I had T-stop adjusted out 5-6 turns.. Make no sense to me...! LOL
tt3 5 turns out 1.774 12.618/107.45
tt4 0 turns out 1.785 12.682/106.97
tt5 0 turns out 1.782 12.583/107.61
tt6 5 turns out 1.763 12.570/107.43
tt7 0 turns out 1.775 12.601/107.25
tt8 6 turns out 1.770 12.555/107.90

*Carb is a Holley 700 DP. (secondary linkage removed, so just running on 2 barrels)...

Thanks!
67champ is offline   Reply With Quote
Old 04-11-2019, 10:03 PM   #2
67champ
Junior Member
 
Join Date: Feb 2002
Location: Ohio
Posts: 43
Likes: 4
Liked 1 Time in 1 Post
Default Re: Mechanical Throttle Stop Adjustment - Question

Ok, I think I found my answer..............
67champ is offline   Reply With Quote
Old 04-18-2019, 07:24 AM   #3
GTOMayhem
Member
 
Join Date: Oct 2014
Posts: 172
Likes: 669
Liked 22 Times in 14 Posts
Default Re: Mechanical Throttle Stop Adjustment - Question

Quote:
Originally Posted by 67champ View Post
Ok, I think I found my answer..............

Inquiring minds want to know.......


Rick Thomason
GTOMayhem
GTOMayhem is offline   Reply With Quote
Liked
Old 04-18-2019, 11:09 PM   #4
67champ
Junior Member
 
Join Date: Feb 2002
Location: Ohio
Posts: 43
Likes: 4
Liked 1 Time in 1 Post
Default Re: Mechanical Throttle Stop Adjustment - Question

Quote:
Originally Posted by GTOMayhem View Post
Inquiring minds want to know.......


Rick Thomason
GTOMayhem
Since nobody had any input I figured I would just keep it to myself.... If anyone (except MW and LG) wants to guess I tell you if you get it correct..... LOL
67champ is offline   Reply With Quote
Old 04-19-2019, 08:15 PM   #5
Patric Fox
Member
 
Patric Fox's Avatar
 
Join Date: Jul 2007
Location: Pottstown,Pa.
Posts: 121
Likes: 24
Liked 11 Times in 8 Posts
Default Re: Mechanical Throttle Stop Adjustment - Question

Probably have to readjust your throttle cable or linkage every time you adjust your mechanical stop, and go back to zero turns on your stop.
Patric Fox is offline   Reply With Quote
Old 04-19-2019, 10:12 PM   #6
67champ
Junior Member
 
Join Date: Feb 2002
Location: Ohio
Posts: 43
Likes: 4
Liked 1 Time in 1 Post
Default Re: Mechanical Throttle Stop Adjustment - Question

Thanks for the input Patric. So, actually the throttle linkage is the stock threaded rod from the bracket on the firewall to the carb linkage. Here's the scoop: For some reason the engine liked the mechanical throttle stop adjusted 5-6 turns out after initial contact with the carb linkage more than it liked FULL THROTTLE! I should have just turned the throttle stop out a few more turns to where it actually would have started slowing the car down as expected. The track was "green" so the consistency was not there until after the 330, and there was some changes in wind during the day..

I think because of my particular/specific engine combo and that I had the secondaries disconnected, and my jetting, etc., the engine may have liked the effective jetting better or the velocity was better or something with this very slight change in the blades. If I double the T-stop turns it will surely slow down, I'm sure!! :-)
67champ is offline   Reply With Quote
Reply


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 01:20 PM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Copyright © Class Racer.com. All Rights Reserved. Designated trademarks and brands are the property of their respective owners.