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472/500 Eldebrock intake vs stock

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2115 cadillac edelbrock intake manifold
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40K views 20 replies 9 participants last post by  Sasquatch  
C
#1 ·
Eldebrock advertises horsepower and torque gains with their intake over the stock 472/500. But does anyone on this forum on have any real world experience with this intake. Does it really create a noteable increase in power? Is it worth the money?

Thanks,
Clayton
 
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#5 ·
I never said I have an Edelbrock, but from the dyno tests I've seen from Flash and a couple magazine articles, along with people I've talked to, I've concluded the Edelbrock is definately worth some HP. Flash got 20hp but lost 7ft.lbs. I don't have the mag articles but they're floating around the internet if you want to take a look at them.

Jegs wants $270, MTS wants $280, Flash wants $300 last time I checked, which was about a month ago...
 
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#9 ·
Sasquatch,
If you're putting this in your '69, yes there will be hood clearance issues. You can get away with it by running either at least a 2" drop base aircleaner, or sometype of low profile setup (like a Weiand or Edelbrock "Proflow").
If you have the hood insulation still intact, it will be resting on the lid.

The Edelbrock is 3.5" taller than stock.

Clayton
If you're not doing any other mods, I'm not sure it's worth it.
It will get approx. 30-40 hp. from what I've experienced. On a stock head motor, I'm not sure it's worth the money. Your heads are the bottleneck anyway. It does look cool and shaves quite a bit of weight though.
If you are rebuilding and going to wake your heads up a little bit, and put more of a performance cam grind in, then definately put this piece on because it is the best option out there for the money, as compared to a Bulldog single plane or some type of Ford 460 intake w/ costly adapter. The Edelbrock 2115 will flow enough air for 5600-5800 rpm and at least 600hp levels.
Being my first post, sorry for the long winded one :D
 
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#11 ·
If it's 5 and 1/8" diameter, which I think it would be, K&N makes a thin raised base. I got the raised base to clear the compressor, skinny to still clear the hood, and K&N to make up for the smaller element. No issues, just had to cut a little bity slot in it for the corner of the compressor.

Also, for your engine I would recommend just cutting the center out of the stocker. It flows 94% of the Edelbrock at WORSE, which really won't make a difference with the stock engine.
 
#13 ·
No AC in my car so that is not an issue. I'm still not convinced about cutting the center out of the stock manifold. I know I've read the postings but still think the added hieght of the Edelbrock intake makes for better mixture. Terrible one where did you find that breather? Any part numbers? Here's what I'm running now.

 
T
#14 ·
Looking pretty good Sasquatch. I didn't realise you had no A/C in your car. So basically you just need to clear the hood. When you say breather, do you mean the air filter? I got it from summit. Just navigate through the departments section until you get to Air Cleaner Assemblies and then the carb flange is 5 1/8 and brand K&N and then pick one that will fit under your hood.

Yeah, I was wondering about the thing myself. Undoubtedly it is made to help with flow. However, the Edelbrock has a bit of a plenum as well, so that is a tad restrictive. Also, I think that if you cut the plenum out of the stock and then added a spacer it would be even closer to the numbers of the Edelbrock.
 
#15 ·
lol.... see, for me atleast... if I have a hot rod Caddy.... then get rid of AC (which I hardly use anyway)....well, that just isn't cool... nor happening, just like i will not be loosing cruise control, delay wipers... or any of the other features the '79 Caddy has.

cutting the center section out of the stock intake isn't a big deal... in fact... I did it!

thats right, also... today, is when the intake is going on, the spare carburator I have is going to be taken apart, soaked, and start to be rebuilt.

Too bad too, since last Wednesday was the last day for Wed. night test and tune at the track, I wanted to see how much of a difference "just" the intake mod made, not everything else...

So before I put it on, I am going to hit it with some paint... it isn't Cadillac Blue (Royal Blue) but it is deep Ford blue which is a close match, and this is hardly any hi-po engine build up (just messing around with the stock 425 for now) so I don't care... I am also going to pull the valve covers (since I already have the gaskets) clean them up, and hit them with paint as well... shes gonna look purdy.

I have a 14" Edelbrock open element air filter, but a total of 1.5" of spacers to clear the AC compressor, so I am going to buy a 1" carburator spacer, to raise the whole carb 1".... more volume of air/fuel mixture within the intake, longer time to atmonize, better.... then I'll just keep .5" of air intake riser (since I have 1" and .5") and the origanal Q-jet will get slapped on for today.... that is, until the new one goes on in the next couple days.
 
#16 ·
I did not remove the AC this car never had it. I bought the car from a man in Washington State and had it brought across the country on a car hauler to Florida. I guess they didn't need the air. I may go with some after market air in the future. After all this is a hearse not a drag racer. I'm just looking for a few bolt on improvemnts like intake, headers, and maybe duals without getting into the "guts" of the engine.
 
#17 ·
Got this in an email from Cad Company
The PCIII intake looks identical to a regular Edelbrock. All of the modifications are on the inside. I really can’t tell you if your air cleaner is too tall because I don’t know what air cleaner you have. Your 1411 carb will bolt up to the Edelbrock or PCIII intake without an adapter. The headers and dual exhaust will help more than the intake, and won’t hurt the bottom end at all. The PCIII hurts the bottom end less than the as-is Edelbrock. The 1411 hurts from idle to redline. With Headers, dual exhaust, PCIII intake, and the 1411, you will be maybe 10 Ft-Lbs over stock at 2000 PM and 20-30 HP over stock at 3800. A cam swap and a better carb will make about 30-40 Ft-Lbs over stock at 2000 and 30-40 HP over stock at 3800, plus it will pull to over 4500 instead of falling on its face at 4000 or so. You can change the cam without changing the valves or rockers, but you’ll want to change the timing chain while you are there (you should probably change it anyway, because the stock gears are plastic and aluminum and are a maintenance item that is usually neglected).

If you don’t want to go inside the engine, and you don’t want to replace the carb, the best combination of parts is going to be the PCIII intake and the headers and dual exhaust. There isn’t much else you can do beyond intake and exhaust with those restrictions
 
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#20 ·
Night Wolf said:
AC has been standard on Caddillacs since... 1961 IIRC?

is it a Caddy hearse? just seems kinda strange...
Click to expand...
According to my 1968 Shop Manual and 1968 Owner's Manual, it was an option in 1968. The fuel filter used in 1968 was different for A/C cars, as only the A/C cars had the vapor return line. Also, the non A/C cars in 1968 did not have the power steering fluid cooler.
 
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