International Full Size Jeep Association
Home Forums Reader's Rigs Tech Library Trail Stories FSJ-List
International Full Size Jeep Association  

Go Back   International Full Size Jeep Association > Tire Kickin' > Street & Performance

Reply
 
Thread Tools Search this Thread Display Modes
  #1  
Old 08-01-2020, 09:09 PM
Maherpmj's Avatar
Maherpmj Maherpmj is offline
232 I6
 
Join Date: Nov 08, 2015
Location: AZ
Posts: 59
670 Truck Avenger carbs jets

I know there are dozens of treads on jetting these carbs, but I have never been able to get a good answer on why Holley put 89 jets in the rear on these stock? Typical rule of thumb is 8 sizes larger if no power valve, not a 21 size jump . That Holley tech on their tech support didn't have an answer.
__________________
Current jeeps
1977 J10 360 4bbl 4" lift w/33s
1977 J20 401 4bbl 7" lift w/37s
2003 Rubicon 4" lift w/33s

Last edited by Maherpmj : 08-01-2020 at 09:16 PM.
Reply With Quote
  #2  
Old 08-03-2020, 09:40 AM
Ristow Ristow is offline
 
Join Date: Jan 20, 2006
Location: The Great Googley Moogley Midwest.
Posts: 17,240
because of the check valves in the metering block that allow it to run at "extreme angle". it changes the typical jetting of a similar size Holley.



notice the lack of high speed air bleeds on the secondary circuit. theres a check valve in there instead. same on the primary side. thats why the truck avenger has annular boosters and the street avenger-with its standard metering blocks-does not.
__________________
Quote:
Originally Posted by Hankrod
Ristows right.................again,




Quote:
Originally Posted by Fasts79Chief
... like the little 'you know what's' that you are.




Quote:
Originally Posted by Fasts79Chief
I LOVE how Ristow has stolen my comment about him ... "Quoted" it ... and made himself famous for being an ***hole to people. Hahahahahahahahahha!


→ Where the kids hang out...

fsjbuilder.org come for the mindless chat,stay for the hand drawn emoticons.

It's like you're unraveling a big cable-knit sweater that someone keeps knitting...and knitting...and knitting...and knitting...
Reply With Quote
  #3  
Old 08-03-2020, 11:25 AM
babywag's Avatar
babywag babywag is offline
out of order
 
Join Date: Jun 08, 2005
Location: Land of froot loops and cukcoo-nuts, CA
Posts: 9,759
The last guy I knew that had one hated it.
Very poor mpg even normal driving.
He traded it for a 470 and was happier.
__________________
Tony
Reply With Quote
  #4  
Old 08-03-2020, 06:13 PM
asphaltrockdweller's Avatar
asphaltrockdweller asphaltrockdweller is offline
350 Buick
 
Join Date: Jul 09, 2009
Posts: 1,170
I had one (670), and ended up selling it off.
They take a whole lot of tuning to get right, and even then it was not fun. Kevin (FSJ78 I think?) has had one on his Chero, but did a lot of tweeking to get it to run well.
If I ever get the Waggy back on the road??? I bought EFI for it. I will use a cheap Holley refurb to get the engine broken in, but change over to the EFI system after that.
__________________
(Ristow) fram....that deserves a ratchet upside the head.
Reply With Quote
  #5  
Old 08-03-2020, 07:17 PM
Maherpmj's Avatar
Maherpmj Maherpmj is offline
232 I6
 
Join Date: Nov 08, 2015
Location: AZ
Posts: 59
Actually I set mine up like Kevin recommended from all his testing and it runs well on and off-road. Zero bogging and seems to pull strong throughout the power band. Never actually ran the carb with the 89s in the rear
__________________
Current jeeps
1977 J10 360 4bbl 4" lift w/33s
1977 J20 401 4bbl 7" lift w/37s
2003 Rubicon 4" lift w/33s
Reply With Quote
  #6  
Old 08-04-2020, 07:45 AM
rocklaurence rocklaurence is offline
Moderator
 
Join Date: Jan 14, 2009
Location: 33812, Lakeland, Fl
Posts: 1,772
I had a TA 470 on my CJ5 and it ran great Off Road--on Road wasnt a concern.
Reply With Quote
  #7  
Old 08-04-2020, 08:44 AM
Ristow Ristow is offline
 
Join Date: Jan 20, 2006
Location: The Great Googley Moogley Midwest.
Posts: 17,240
i had a 670 on my 401. it ran decent. the only change i made was it came with a 2.5 PV and had a bog on transition to power.



so yeah they can run fine. but if you are not off roading more than half the time there are better carbs to run.


people buy these for their daily drivers because it has "Truck" in the name.


i bought mine because of the annular boosters,not looking at the rest of the specs which would have revealed the annular boosters benefits are wasted on the check valve'd metering block.




for a daily driver i wouldn't buy a carburetor that didn't have removable air bleeds and idle jets. i used to retune holley 4180's in that fashion. best street VS carb holley made.
__________________
Quote:
Originally Posted by Hankrod
Ristows right.................again,




Quote:
Originally Posted by Fasts79Chief
... like the little 'you know what's' that you are.




Quote:
Originally Posted by Fasts79Chief
I LOVE how Ristow has stolen my comment about him ... "Quoted" it ... and made himself famous for being an ***hole to people. Hahahahahahahahahha!


→ Where the kids hang out...

fsjbuilder.org come for the mindless chat,stay for the hand drawn emoticons.

It's like you're unraveling a big cable-knit sweater that someone keeps knitting...and knitting...and knitting...and knitting...
Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search
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

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
RISTOW: Truck Avenger carb question rocklaurence General FSJ Tech 21 09-19-2010 05:01 PM
What it took to get the Bread Truck 4BT donor home e_digg Diesel Swaps 10 04-09-2010 11:20 PM
Dumb quick question about Truck Avenger Voodoochiled445 General FSJ Tech 26 01-13-2010 08:55 PM
Holley truck avenger, need a power valve! DrveJeepDrnkBeer General FSJ Discussion 9 12-01-2008 06:37 AM
adjustable jets for holley carbs JeepsAndGuns General FSJ Tech 4 08-27-2008 08:46 AM


All times are GMT -6. The time now is 11:48 AM.


Powered by vBulletin Version 3.5.4
Copyright ©2000 - 2020, Jelsoft Enterprises Ltd.
corner corner