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.

Airaid Poweraid Quadrajet Carb Spacer

7

78GMCJIMMY

1/2 ton status
Joined
Mar 29, 2003
Posts
135
Reaction score
0
Location
Gresham,Oregon
Has anyone Tried out one of these Airaid Poweraid Quadrajet Carb spacers? http://store.summitracing.com/partdetail.asp?part=AID-100-705 I am thinking about getting one for my 78 Gmc jimmy That has a sb350,RV cam,Performer Manifold,Quadrajet carb,and Stock exhaust manifolds into true duals with no cats. Just looking for a lil' input before I drop a 100 bones on a carb spacer. Thanx
 
hmm...i think you can spend $100 somewhere else to get a little better power and maybe have money left over to buy say a mr gasket spacer.
 
hmm...i think you can spend $100 somewhere else to get a little better power and maybe have money left over to buy say a mr gasket spacer. OK. School me on where to spend my $100 then?Oh yeah and I want enuff left to buy a 12 pack o' Coors light. A 100 bones does not get ya' very far these days.As a matter of fact at $4.09 a gallon it costs over $100 just to fill the tank in the jimmy now.:eek1: Thanx for the reply
 
78GMCJIMMY said:
OK. School me on where to spend my $100 then? A 100 bones does not get ya' very far these days.As a matter of fact at $4.09 a gallon it costs over $100 just to fill the tank in the jimmy now.:eek1: Thanx for the reply
Click to expand...
There are other spacers out there that sell for much less that will do the same thing...thats all he was really getting at.
 
The reason I ask is I heard good things about the airaid pweraid for TBIs and was justb wondering if the same can be said of the quadrajet version?Ok basically my question Then is will a carb spacer be beneficial to me? What type open or 4 hole or the Airaid Poweraid?Thanx for the replies
 
you can find some headers for under $100 or just over $100(150) you can get hedmans, some people hate the cheap ones but i have some and they looked very well built and have lasted me a while. and i think redneckdude is right, i believe ive seen spacers just like this one for much cheaper. im not positive though...
 
78GMCJIMMY said:
The reason I ask is I heard good things about the airaid pweraid for TBIs and was justb wondering if the same can be said of the quadrajet version?Ok basically my question Then is will a carb spacer be beneficial to me? What type open or 4 hole or the Airaid Poweraid?Thanx for the replies
Click to expand...

im not sure on how much it will benefit you, but, i think having the seperate 4 holes would be better. i think the air/fuel will have a better time mixing in seperate tubes rather then getting spit out into a big hole together.
 
4 hole spacers lower the torque curve a bit. Giving better throttle response and if you tune the carb right slightly better MPG.
Open spacers give more power on the top end and sacrifice a little low end torque.
4 hole spacers on a stock or dual plane manifold will add runner length and build torque on the low end sooner in the rpm band.
basicly a spacer is something you add when you have everything elsre right to fine tune your engine.
 
4-hole is the way to go, imo. a little more low-end torque is never a bad thing on these big heavy beasts. the tradeoff is that you might lose some high-end hp, but if you're like me, you don't cruise the k5 much above 80mph anyway, so it's not a big deal.
 
Not that $100 will buy them, but headers are a HELL of a lot more "bang for buck" than a $100 carb spacer. (excluding the costs of exhaust work) I understand that requires exhaust work as well, but you are likely to see +40 HP/TQ increases, which would work out to $100/10 of both, with almost absolute certainty. (newest Engine Masters has a 4.6 Ford article showing IIRC +38HP with headers alone FYI)

Most tests I've seen indicate less than 10HP with a carb spacer. If it was $25 no problem, but IMO not for $100, for what it is.
 
A carb spacer could be a good DIY project. A piece of 1" plastic (UHMW sells for $30/square foot - just find a vendor that cuts and ships), a drill, some bits, a hole saw, a tube of silicone and longer carb-to-manifold bolts and you're in business. The one hole style would be harder.

If you shopped around or knew somebody in a machine shop you might be able to get a carb spacer built for $100. I know you wouldn't since it's already available, but my point is to think about what you are getting for that money.
 
i've never seen those spacers made by jet. lots of spacers have spiral cuts, but those have some sort of weird power lumps. interesting

one time, at autozone, i saw a 3-part spacer. there was a main section that had 2 inserts you could put in there to make it either open or 4-hole. i don't know if they make a similar one for speadbore applications. if it works well, it could be handy. use open for highway trips and 4-hole for offroading or stop-n-go city driving.
 
454k30 said:
gimicky junk IMHO
Click to expand...

Carb spacers are not a gimmic. They do work. They are an item you use to fine tune your engine. For carbs, They are more of a drag race thing than street. Drag racers have been using them for many many years to tune the torque curve. You can have the torque curve come early or late depending on how you want your car to run and lane conditions. Spacers are usually good for at least 1/10 second if used right.

For street and 4x4 Carbs. The 4 hole is the best.
For TBI the oppisite works. I like open spacers better than the 2 hole kind. Open spacers with TBI build more HP and allow the TB to breathe better.
 
Blue85 said:
A carb spacer could be a good DIY project. A piece of 1" plastic (UHMW sells for $30/square foot - just find a vendor that cuts and ships), a drill, some bits, a hole saw, a tube of silicone and longer carb-to-manifold bolts and you're in business. The one hole style would be harder.
Click to expand...

Just need a bigger hole saw to do the one-hole style. (Dayum that just sounds WRONG! :haha: )

TAPPlastics.com is a good choice -- of course, I'm spoiled, they're local to me.

Why silicone? You talking about RTV'ing the thing instead of, or in addition to, the base gasket? Seems like you could/should use two gaskets, one on each side; I donno about UHMW but *nothing* sticks to HDPE.

-- A
 
One thing no one answered...What size , I saw them from .250 to .500 or 1/4 to 1/2. Which is better or which is better for what and/or over-all application?
 
Carb spacers have been around for many years. From what I remember the carb spacers reduce the effective CFM of the carb. So a 650 CFM carb will flow like a 500CFM carb ( or something like that ). Throttle body spacers on a TBI are effective because the fuel is pressure fed into the intake vacuum, whereas the carb fuel supply is sucked into the intake vacuum.
If you really want to spend that $100 wisely, either purchase a duel plane intake manifold or a MSD 6A(L). ignition. Either or both will significantly enhance your engine performance.
 
One thing no one answered...What size , I saw them from .250 to .500 or 1/4 to 1/2. Which is better or which is better for what and/or over-all application?
Click to expand...


i'd say anything under 1/2" would be fore fine tuning only. i'd go with 1".
 
Carb spacers dont reduce CFM. You must be thinking restrictor plate. Carb spacers either:
Add runner length = 4 hole kind & dual plane manifold= more low end power
or
Add plentum volume= Open kind & Single plane manifold = top end power

Spacers come in many sizes so you can stack them or take them out to fine tune the torque curve to where you need it to come in at.
For a street machine. A 1" 4 hole on a dual plane manifold will work good to give you more torque on the low end.
 
You must log in or register to reply here.

Latest Posts

Top Bottom