How much $? Your alum. intake manifold...

[jode]

Who here is running a smog legal aftermarket 4bbl intake? Where did you get it? What did it cost you?

I'm done with my MC 4350 and have approval from wife to drop the $$ on aftermarket intake to use a different carb.

PS, what carbs are you running with them?
PSS If you aint using yours, will you sell it to me?

[ February 15, 2003, 12:52 PM: Message edited by: jode ]

[243]

Holley Z-300 100.00

[Brown Bear]

a smogged up edelbrock would work on your 76, i believe the smog stuff wouldn't be a prob <ie, your truck had a 4v option from factory>. You can get everyone's favorite <almost everyone> edelbrock performer new for about $180

[jode]

So, what is the difference betwixt a an Edelbrock "Torker" and an Edelbrock "Performer"?

Also, what is the dif betwixt single and double plane?

THX

EDIT
One more thing....has anyone had hood clearance problems when running a performer (or any othe manny in an FSJ?

[ February 13, 2003, 07:58 PM: Message edited by: jode ]

[Stuka]

there is two versions of the performer. one with egr (smog legal) and one without (not smog legal)

the torker has more top end then the performer. the air gap has more top end then the torquer if I recall correctly.

[Jeep Jeep]

I just installed the performer w/EGR and the 1400 carb. The hood clearance is close with the factory air cleaner, but it does not touch. From what I can tell, there is approx 3/4" clearance between hood and air cleaner. This is with new motor mounts. I bought my intake and carb from JEGS.

[4DWUDS]

The single plane intake is more for top end HP at high RPM's, not what you would want for rock crawlin and the low end throttle responce is slow , not what you want there either. A duel plane works best from off idel to about 4500 rpm, has good low end throttle responce and lets a stock motor build all the torque down low ,just where a 4X4 needs it. The Air Gap manifold is the same as the "RPM" series manifolds only with the "Air Gap". I have yet to see any real world numbers that say one is way better than the other.

[243]

The exception is the Holley Z-300, a single plane, small runner manifold which keeps intake velocity high and provides great low end torque.

[Jeep Jeep]

243, is the Z-300 avilable with EGR?

[Jeep Jeep]

On the topic of intakes. Does anyone know much about the OFFENHAUSER intake, less EGR. One of my parts rigs has one.

[FSJeeper]

Originally posted by Jeep Jeep:
On the topic of intakes. Does anyone know much about the OFFENHAUSER intake, less EGR. One of my parts rigs has one.Check to see if it an Offy Dual Port intake. If it is you will have one of the best FSJ intakes ever made.

[Lindel]

The Offy dual port is still available, too.

Also, if you want to run a non-egr manifold, but keep the vehicle street/smog legal, then get the Ford EGR carb plate. It has all the smog/EGR passages built into the spacer plate, and will allow you to use a non egr manifold on a car required to have egr.

The Offy offers the best of both worlds, in that it has small, long primary runners, to keep the torque high, at low engine rpm's. The secondary ports allow the extra air/fuel mix into the combustion chamber, when the demand is there!

[The Preacher]

Performance nothwithstanding, what impact does the manifold have on economy?

[243]

I've not heard about the dual port Offy but it sounds interesting.

Jeep Jeep~

The Holley Z-300 has an EGR. My understanding is that Z. Duntov designed the manifold specifically for the AMC smallblock. Where's Ralph...I think he can offer even more info.

[Jeep Jeep]

Good info. I thought the only new available intake w/egr, was the Performer.

I'll pull the carb and see if it's a dual port.

Preacher, I have not dorve enough to check mpg differnce.

[FSJeeper]

You don't have to pull the carb, it will say Dual Port on top of the runners between the carb and distributer.

[gp_frk]

FSJeeper does the offy have and EGR?

[FSJeeper]

I think they come either way. The one I have does have EGR.

[gp_frk]

OK thanks. BTW I got your stuff whenever you need it let me know. Maybe swing it by this weekend or something.

[DerJeep]

Originally posted by Lindel:
The Offy dual port is still available, too.

Also, if you want to run a non-egr manifold, but keep the vehicle street/smog legal, then get the Ford EGR carb plate. It has all the smog/EGR passages built into the spacer plate, and will allow you to use a non egr manifold on a car required to have egr.How would the EGR get exhaust gases if the intake manifold were not setup to provide it to the EGR spacer?

[Lindel]

I stand corrected on the egr plate, my mistake! ;)

[gp_frk]

btt pascal look at my last post

[jode]

Does the Holley Z-300 fit a 401?

So from what I understand from the above, the Torker is for race cars as are single plane intakes.

So what I want for my wheeler is a dual plane
offenhauser or
performer or
Z 300
????

So how much do the offenhausers cost? Where do you get them?

Where do you get a z-300? Originally posted by The Preacher:
Performance nothwithstanding, what impact does the manifold have on economy?Anybody got an answer for this?

BTW, all this has me wondering how my stock manifold does as far as performance...was it a good design? Or a dog?

[Stuka]

The 4v manifold really isnt to bad, its good for low rpm torque. But its very heavy, doesnt disipate heat well at all, and doesnt do much over 3k rpm's.

[steven79]

jode what you going to do with the old carb? i got a stock 4bbl intake and need a carb for it.

[78 blu ox]

Jeep Jeep,
I'm planning on doing the same manifold and carb upgrade next month. Did you have any problem hooking all your hoses back up to pass CA smog?
........Perry

[The PIG Smith]

The Offy dual port is still available Where does a person purchase an Offenhauser intake?

Also, what is the link the Offenhauser home page?

[jode]

Originally posted by steven79:
jode what you going to do with the old carb? i got a stock 4bbl intake and need a carb for it.Both of my old MC 4350s are up for grabs...both are peices of warped poo...both are not worth shipping...that is why am in this whole mess. If you need parts off them (brand new float, jets, acc pump, etc.) let me know and I'm sure they'd be worth shipping. I just bought a rebuild kit for this so the parts are brand new.

[Brown Bear]

You can buy the Offy intake from the PAW catalog, but as far as i know, offy doesn't have a website. if they do, I can't find it. They have two. one is a dual por 360 degree single quad high rise intake, and runs $254.95. The second is is a 360 degree equa flow high rise single quad manifold and runs $229.95. They don't state if either one has an egr or not.

[Brown Bear]

on a side note: the dual port manis have the numbers OFF-6054-DP for 67-69 engines and OFF-6056-DP for 70 and later engines. also has a side note saying std. bbl carb. I'm not sure if that means it'll fit the amc spreadbore pattern, or the standard squarebore pattern <ie holley and edelbrock>. the single quad has numbers of OFF-5771 for 67-69, and OFF-5917 for 70 and later and makes no statements as to what carbs it fits, but again i am assuming they are for standard squarebores. These parts numbers also may only be PAW catalog numbers, but thought I'd throw them out to ya'll anyways.

[jode]

What is PAW's phone number? I don't have their catalogue, but I do have a telephone :D

So is the Offy the intake of choice then?

What about that z-300?

Any opinions?

[maxrad]

I'm still on my "quest" for getting the best MPG from regular gas using a carb.

I have good luck in the MPG arena using the alum manifold (weight savings and the ability to stay a little cooler than iron). The 4 barrel carb will not hurt fuel economy either since these are progressive 4's and more efficient than the old stock ones.

If you keep your foot light :rolleyes: you can actually gain MPG while increasing horse power and daily drivability.

[Brown Bear]

Jode, you can to PAW at www.pawengineparts.com (http://www.pawengineparts.com) , and their number is 818.678.3000. Never tried the offy, but would if i could.

[The PIG Smith]

Thanx for the tip Brown Bear, I just ordered my PAW catalog!

[Ralph]

I've been getting emails and PM's as a result of this thread, so I'll give y'all the rundown here.

The Holley 300-31Z is no longer made. It was designed specifically for Jeep applications of the AMC 304/360/401 V8 by Zora Arkos-Duntov, who was famous for his developmental work on Corvettes.

It was a single-plane manifold, but had narrow runners so that the airmass would flow at high velocity, and also so that the airmass could either accelerate or decelerate quickly which provided good throttle response. The narrow runners were also said to contribute to better fuel economy, but that could've been just sales jargon.

I used to have photos of a Holley 300-31Z and an Edelbrock 3731 that I posted on the forum, but I don't have them any more. The basic differences are the single-plane versus dual-plane, narrower runners, and a much heavier bottom side such that riveting a heat shield is unnecessary (as it is advised to do for the Edelbrock).

The Holley manifold was designed to be emissions compatible for model years 1972-1979, as it had a square bore 4-bbl carb port, an EGR port, a choke heater port, and was designed to be used with an emissions-compliant 4160-type carb that Holley offered at the time, Model # 0-9626.

Nowadays, however, Holley tech advised purchasing a Truck Avenger carb and setting it up for your particular needs.

In the past two years, I've bought a pair of these manifolds, a brand new one and a used one. I sold the new one to Derf for about $250, and he's now using it with a Truck Avenger carb (the lucky bastage!)

As for the used one, I had originally bought it on eBay for about $150 with the intention of building a port injection system on it, but appreciated the manifold so much that I didn't want to alter it and instead sold it on eBay to someone who would use it properly. I got $250 for that, as well.

So they aren't cheap when they can be found. Among my daily searches on eBay are for key-phrases "wagoneer" and "AMC +intake," so I can tell y'all that you'll be bidding against me tooth and nail if I see another one come up for auction!

[243]

Ralph~

I have one that could be traded for a used Holley Pro-Jection...wink wink, nod nod smile.gif

[Ralph]

243, oh why tempteth thou me! Unfortunately, I am saving pennies to get my dog's knees fixed.

I would think that a Holley Pro-Jection would be a sweet match for that manifold, but trading one for the other would be a bit one-sided in favor of the Pro-Jection which, even used, costs about $400 on eBay.

Tell you what, on my next trip to Houston, just leave it under your pillow and I'll swap it for a shiny new quarter!

[jode]

Thanks for the info Ralph & Brown bear....good to know....

So that pretty much eliminates the Z300 from my search. Who was it at the beginning of this thread said that the Z300 was to be had for around $100? :rolleyes: ;) :D

I guess I am back down to the OFFy or the Performer...what to do? what to do.....?

[ February 16, 2003, 12:13 PM: Message edited by: jode ]

[Jeep Jeep]

78 blu ox,
I have not smogged it yet. I'm working on the body now. The down side to this upgrade, is the 1400 is only CARB approved for mid 80's chevy's. How well do you know your smog guy? Also if it was not a factory 4bbl, that could also be a problem. As far as hooking up the hoses, there was no problem.