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#1060720 - 02/12/19 02:41 AM ZZ4 intake vs 3701  
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GNX89 Offline
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GNX89  Offline
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Los Angeles, Ca
My car seems to be leaking water from the intake manifold gasket. Since I’m gonna remove it to replace the intake gasket I thought maybe time for an upgrade. What’s the difference between the Zz4 intake and the 3701 edelbrock intake? I picked these two because they have EGR port since I live in California. My car is an 86 SS with just headers. Is it even an upgrade from the stock SS intake? Thanks

#1060725 - 02/12/19 05:30 AM Re: ZZ4 intake vs 3701 [Re: GNX89]  
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mmc427ss Offline
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Pottstown, Pa
The stock L69 intake is alum and not a bad flowing intake for that engine. My take is you wouldn't notice much if any improvement swapping it out. There are a few minor things you wouldn't get with a different intake. One is the bracket that runs from the A/C compressor to the intake, the Edel doesn't have a boss/tapped hole to mount that bracket to.

In CA it may to smart to keep whatever parts you buy to CARB compliant due to the changing strict emissions requirements in CA. The Edel may not be a CARB approved intake. Not sure about the ZZ4 intake. Also ports would be a little larger on the new intakes, slight mismatch to the L69 heads.

One reason to upgrade the intake would be how much corrosion the old intake has around the coolant passages. Alum intakes will leak at the passage openings due to this corrosion. Mostly at the front two ports which come off the front of the heads. At the rear of the intake the same can happen but those areas are just block offs for the coolant there, no flow into the intake. Also the thermostat housing surface may also corrode. Just something that look at when you pull the intake.

EGR passage in the intake and head need to be cleaned out to keep EGR operational. intake passage usually coked closed on high mileage engines.

Of course having a new, pretty intake will dress up the top of the engine. You could always glass bead the L69 intake and clear lacquer it.
Bob

#1060726 - 02/12/19 12:42 PM Re: ZZ4 intake vs 3701 [Re: GNX89]  
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200kSS Offline
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I've run both the ZZ4 and 3701 intakes on the same engine and not noticed any difference in performance between the two. Doing a quick search I cannot find any documentation of either intake having CARB approval.


88 SS Black/Oxblood. Power Tour car
80 Malibu 2dr. Drag Week car
#1060745 - 02/14/19 02:09 AM Re: ZZ4 intake vs 3701 [Re: GNX89]  
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GNX89 Offline
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GNX89  Offline
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I didn’t realize they were not CARB approved. I thought because they had EGR ports they were acceptable. Maybe some porting on the intake might help?

Last edited by GNX89; 02/14/19 02:09 AM.
#1060750 - 02/14/19 03:54 PM Re: ZZ4 intake vs 3701 [Re: GNX89]  
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Buick Runner Offline
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I think the issue with aftermarket intakes is that they are not designed to fit with the expensive carb gaskets with the built in heater grids. With intake gaskets, be sure to use ones with a metal shim core which helps to keep their shape.


SBC powered 1987 Regal with TES headers, ZZ4 intake, ZZ4 PROM chip, mini starter, THM2004R, 2500 stall converter, 2040 cam, CCC system, and 3.73 posi rear.

2008 ex NPS P71 Crown Victoria, cop motor, cop shocks, cop brakes.

Never argue with an idiot.
They will just drag you down to their level and beat you with experience.
#1060753 - 02/14/19 05:18 PM Re: ZZ4 intake vs 3701 [Re: GNX89]  
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Bitflipper Offline
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I found the following quote on thirdgen.org. I brought my car into California from Canada and had to go through the entire Smog Referee thing. I have an Edelbrock 3706 intake and that didn't give me any trouble. The biggest problem was the Edelbrock TES Headers that don't have a carb EO number stamped on them. Luckily I had the receipt from Summit Racing when I bought them some 15 years prior, and thankfully they accepted that.

I rest much easier now that I'm in Nevada - Classic Vehicle plates, no smog. Anyway quoting madmax on thirdgen.org:

"...If you have the Performer intake (not the air gap or RPM) and it has an EGR (because your car originally came with one) its considered a stock replacement part. From Edelcrock.com (and its been this way since at least back to 1991)
Quote:
#3701 is stock replacement/street legal part for 305, 350 and 400 V8s with OEM 4-bbl.
3701 is the Performer manifold with EGR. It does NOT need a CARB EO number to be legal, that was already determined a long time ago and its because its considered stock replacement. Dont ask me why or how, thats just how it is.

As far as bringing another car into this state, it has to have all the original emissions equipment intact and pass the visual and smog test if they do that where you are in Cali which is almost all of Cali."


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#1060754 - 02/14/19 05:43 PM Re: ZZ4 intake vs 3701 [Re: GNX89]  
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thepezking639 Offline
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Livonia, MI
The real answer is very simple. Don't live in the Fascist state of California.


86 SS 6.0L LQ4, TBSS GEN IV intake, 92mm TB, 30lb injectors, Summit Stage 3 NA Cam, Stainless long tube headers, Stainless 3in exhaust, Microsquirt ECU, Built 200-4R, B&M Megashifter, Torsen LSD, QA1 Lvl 3 Suspension Kit, UMI Front & Rear Braces. Check out my build thread: http://www.pro-touring.com/threads/126188-SSLOW6-0-Build
#1060755 - 02/14/19 07:18 PM Re: ZZ4 intake vs 3701 [Re: GNX89]  
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mmc427ss Offline
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Pottstown, Pa
On Edel website under info for the 3706 it states:

"Even though manifolds are compatible with EGR systems, this does not mean they are legal for use on emissions controlled vehicles. Check local laws for legality."

Had TES headers once, no CARB plate on the headers. The Hooker 2050 I run now had a CARB plate welded to it. It was removed before the header were sent out for coating. That plate now resides in a drawer in case I ever need it for the smog police.

That 3706 is expensive, spend the money on having the stock Qjet rebuilt, life in CA would be easier with that old car and the original Qjet/CCC system.

Have thought that "the Wall" should go on the East side of CA, up and over to the coast. Install a turnstile on the south side. CA has talked about succession, may be the time to do that. The rest of us wouldn't need to pay for their problems, fire, rain and politics.
Bob

#1060760 - 02/14/19 10:00 PM Re: ZZ4 intake vs 3701 [Re: GNX89]  
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Bitflipper Offline
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Las Vegas, NV
> Have thought that "the Wall" should go on the East side of CA

And the hippies, the dirty hippies that drive their EVs... they're going to pay for it.

Last edited by Bitflipper; 02/14/19 10:00 PM.

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#1060763 - 02/15/19 08:11 AM Re: ZZ4 intake vs 3701 [Re: GNX89]  
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Buick Runner Offline
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Dharma station 1 the Hydra
Shame, Ca is a beautiful state, ruined by its own state government that has gone off the rails. NJ is not much better, with a much worse climate and tons of road salt for nearly half the year. Last time I was out in Ca, I noticed the beat up work vans weren't rotted out like all the work vans and trucks in NJ are.


SBC powered 1987 Regal with TES headers, ZZ4 intake, ZZ4 PROM chip, mini starter, THM2004R, 2500 stall converter, 2040 cam, CCC system, and 3.73 posi rear.

2008 ex NPS P71 Crown Victoria, cop motor, cop shocks, cop brakes.

Never argue with an idiot.
They will just drag you down to their level and beat you with experience.
#1060764 - 02/15/19 12:56 PM Re: ZZ4 intake vs 3701 [Re: Buick Runner]  
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thepezking639 Offline
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thepezking639  Offline
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Livonia, MI
Originally Posted by Buick Runner
Shame, Ca is a beautiful state, ruined by its own state government that has gone off the rails. NJ is not much better, with a much worse climate and tons of road salt for nearly half the year. Last time I was out in Ca, I noticed the beat up work vans weren't rotted out like all the work vans and trucks in NJ are.


Also tech billionaires and land developers driving up the cost of property. It ain't just the state govt.


86 SS 6.0L LQ4, TBSS GEN IV intake, 92mm TB, 30lb injectors, Summit Stage 3 NA Cam, Stainless long tube headers, Stainless 3in exhaust, Microsquirt ECU, Built 200-4R, B&M Megashifter, Torsen LSD, QA1 Lvl 3 Suspension Kit, UMI Front & Rear Braces. Check out my build thread: http://www.pro-touring.com/threads/126188-SSLOW6-0-Build

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