What's new
CK5
Register an account today to become a member! Once signed in, you'll be able to participate on this site by adding your own topics and posts, as well as connect with other members.

Just got 86 blazer, need help, got alota ideas

oh, and for the record, I prefer divorced chokes to electric.. manual is kinda cool, being a mechanic and all... but it is asking for trouble for the forgetful, or unknowing...

i once had a friend borrow one of my Mopars.. 72 340 Challenger, manual choke... he pulled the damn lever out, not knowing what it was, then calls me when it sh*t the bed some miles later...
 
Cuztom Racing said:
Which carb is better for my application, been reding up on all of them and cant make my mind up... A regular holley 650, a truck avenger 670 or street avenger 670???
Click to expand...

I'd say the truck avenger 670 is good match for a 350.


Also what is a divorced choke?
 
mounts to the intake usually...


313MDCDZ4SL._SL500_AA280_.jpg


350-2101_5.jpg




sutton429d.jpg
 
I was planning on keeping the Q jet, but the TBI stuff just fell into my lap and I couldnt pass it up. The q jet would probable be the best all around carb for you, If youre gonna do mud bogs and make big power, Then yes id go holley. Just to cruise around with the family, or driving to the deer shack why ditch the Q jet? It was designed to do all things well, a holley is just to go fast.
 
Good info guys looks like im leaning back toward the quad.. Which is good cuz its cheaper than the holley..
 
i ran a quad for a long time, then it started not working properly. i dont really know the mechanicals of carbs so instead of rebuilding it i replaced it with a holley 650 double pumper that i had. i do not like this carb at all for the kind of wheeling i do. any hill or off camber section i get near the truck will die. im constantly re-starting that pyle :doah:

if i dont get injection soon im gonna look for another quad.

the holley may work for what you want to do, im just throwin my .02 in.
 
Well ill be riding up and down the pipeline on occasion which does have some steep hills. My main reasoning for using the holley was cuz everyone said it made more power than the quad. More power is always a good thing and sometimes you have to sacrafice to get more power but i dont want the thing dieing everytime i go offroad cuz it will see alota offroad action just nothing major, just easing around the back 40..
 
i was going to put holley main jet extensions in my carb to see if that would help. got some other stuff to do before my truck is ready to wheel but ill post up if they help at all.
 
raymos said:
i ran a quad for a long time, then it started not working properly. i dont really know the mechanicals of carbs so instead of rebuilding it i replaced it with a holley 650 double pumper that i had. i do not like this carb at all for the kind of wheeling i do. any hill or off camber section i get near the truck will die. im constantly re-starting that pyle :doah:

if i dont get injection soon im gonna look for another quad.

the holley may work for what you want to do, im just throwin my .02 in.
Click to expand...

double pumper carbs are not meant for offroading at all. The center hung float boals alows for any slight camber change to either flood the engine or starve it of fuel. The side hung floats on the Holley single feed 4160 carbs is a much better design and is a lot less effected by camber changes. Add to that a set of spring loaded needle seats and higher main bowl vents adds to a carb that can do everything a quadbog can and make more power.

The Holley Truck avenger is actually based off of a 4160, that is why it is so successful.

With true for any carb, if it isn't tuned propperly then it doesn't matter what it is or how big it is it will not function to its full potential.

Also if you have problems with off camber on a Holley, I know you can lower the float level slightly to help the stalling problem.

I have a Holley 4160 with spring loaded needle seats and since I tuned it I have never had a problem with it stalling off camber. Unless of coarse its to the point where any carb would have trouble.
 
just to clarify something here too..... given the same motor, you wont make more "power" with a Holley..... or a Carter... or a quad....

it's just a fuel delivery system... as long as it delivers the proper amount of fuel for the motor, when, and how the motor wants it, they should all perform the same... the cylinders don't care if it comes from a turkey baster....

it's the limiting factors of each system that makes them different..

the prob with a quad in big horse applications is bowl volume... there are ways to overcome this, to an extent.. On the street tho it has one huge advantage over most Holleys... it's a spreadbore..
 
ryoken said:
just to clarify something here too..... given the same motor, you wont make more "power" with a Holley..... or a Carter... or a quad....
Click to expand...

TBI is a fuel delivery system, how come that makes more power?
 
Chevy305 said:
TBI is a fuel delivery system, how come that makes more power?
Click to expand...

If comparing stock engines, the ECM can do things with the fuel and timing electronicly that would never be possible with a carb and vacuum/mechanical advance.

But that would be a stock say, 86 Qjet equipped 350 vs a 87 Tbi 350.

Id have to bet a pre smog, strong 350 would stomp a TBI 350 quite easily in the power department, but the all around drivability wouldnt be quite the same as the TBI.
 
Chevy305 said:
TBI is a fuel delivery system, how come that makes more power?
Click to expand...

it doesn't.... it's just a more efficient system of delivery combined with many other engine changes from ignition timing to cam profile, volumetric flow, etc...

think about it... what fuel a motor wants at a given rpm isn't based on what a fuel system can deliver, it's based on other aspects.. most importantly, the cam profile...

but with 2 identical motors, running at optimum efficiency, meaning perfect plug readings, it doesn't care what carb delivered it...

how can one carb make more power than another, by dumping more fuel? well, then it's not running at optimum efficiency, and plug readings will show this...
 
ryoken said:
it doesn't.... it's just a more efficient system of delivery combined with many other engine changes from ignition timing to cam profile, volumetric flow, etc...

think about it... what fuel a motor wants at a given rpm isn't based on what a fuel system can deliver, it's based on other aspects.. most importantly, the cam profile...

but with 2 identical motors, running at optimum efficiency, meaning perfect plug readings, it doesn't care what carb delivered it...

how can one carb make more power than another, by dumping more fuel? well, then it's not running at optimum efficiency, and plug readings will show this...
Click to expand...

ok I see what you are saying....

I'm still gonna stick with my Holley because thats what I know.... :whistle:
 
thats cool, I've had plenty myself... heck, my first dozen cars had Holley's... I didn't wanna come across as badmouthing them... I just wanted it to be known how good a quad is..
 
ryoken said:
it doesn't.... it's just a more efficient system of delivery combined with many other engine changes from ignition timing to cam profile, volumetric flow, etc...

think about it... what fuel a motor wants at a given rpm isn't based on what a fuel system can deliver, it's based on other aspects.. most importantly, the cam profile...

but with 2 identical motors, running at optimum efficiency, meaning perfect plug readings, it doesn't care what carb delivered it...

how can one carb make more power than another, by dumping more fuel? well, then it's not running at optimum efficiency, and plug readings will show this...
Click to expand...


I dont think your seeing what they are saying... Yes the holley would be dumping more fuel becuase the holley is bigger and lets more air in the engine.., requiring more fuel.. Its like putting a K&N cold air kit on a new camaro vs a stock intake system.. It simiply makes more power by letting more air in the engine.. I know 4 wheeler drag race carbs like the back of my hand but there isnt much similarites with the truck carbs so im a little out of my league but thats how i see it... Letting more air in the engine = needing more fuel = more power.... Ive had several buddies say they liked the quad on the 4wd's as far as useability and gas mileage but could tell the holley made more power so it just seems the truck avenger would be the carb to go with (for my situation).. If i were rock crawling or some crazy **** like that then yeah the quad would be the answer. Buuut i still havent ruled it out, as the quad is a good bit cheaper..
 
actually I think your ignoring the logic of what I just said...

it's not a matter of a Holley "letting in more air" a quad lets the motor have as much fuel and air as the motor wants... dictated by the cam, etc...

being a square bore doesn't mean a Holley gives a motor "more air" it just means the primary side is bigger, applying fuel in a different manner...
 
Go ahead and buy the Holley. However when you are on the side of a hill and all your engine is doing is choking and dying on you maybe you will remember the advice that ryoken was trying to give you. Bottom line a Quad is a superior carb for off camber situations. It just works, period!!!
 
You must log in or register to reply here.

Latest Posts

Top Bottom