Edelbrock Heads(was Blocking)

P

patrick flowers

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Sep 19, 1997
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Tom,

I've also been thinking about my "dream" 455 using the Edelbrock heads.
Any idea why they specify the "Torker" intake for use with these? I've
been meaning to email them to ask - thought maybe you already had. I'm
planning to use the "Performer" intake as it focuses more on the lower
rpm(idle to 5500 iirc) range.

Patrick

>
> I have just about decided to go with the new Edelbrock aluminum heads,
> Performer manifold and fuel injection. See this"
> http://www.tcsn.net/mondello/edelhds.html
- --
Patrick Flowers
Mailto:patrick

The GMC Motorhome Page
http://www.gmcmotorhome.com
 
Patrick I intend to use the performer manifold also. Somewhere I have and
evaluation of the 455 with all of these different manifolds and I was
surprised at how little difference there was in torque and horsepower
curves. Nice thing about the edelbrock heads is that eliminate pinging on
bad gas.

>Tom,
>
>I've also been thinking about my "dream" 455 using the Edelbrock heads.
>Any idea why they specify the "Torker" intake for use with these? I've
>been meaning to email them to ask - thought maybe you already had. I'm
>planning to use the "Performer" intake as it focuses more on the lower
>rpm(idle to 5500 iirc) range.
>
>Patrick
>

>>
>> I have just about decided to go with the new Edelbrock aluminum heads,
>> Performer manifold and fuel injection. See this"
>> http://www.tcsn.net/mondello/edelhds.html
>--
>Patrick Flowers
>Mailto:patrick
>
>The GMC Motorhome Page
>http://www.gmcmotorhome.com
>
>
>
 
Arch,

I know what you mean, but Edelbrocks "Performer" line is intended for
street use. Like I said, they claim(of course I realize what "claims"
are worth) the Performer 455 intake is optimized for the low end,
idle - 5500. Check out the Edelbrock page. The Toro intake is terribly
ashmatic.

Patrick

>
> In a message dated 10/11/99 8:16:15 PM Central Daylight Time,

>
> > I'm planning to use the "Performer" intake as it focuses more on
> > the lower rpm(idle to 5500 iirc) range.
> >
>
> When I first got mine I too had dreams of hot manifolds ect. Just be
> sure to take a look at the specs. Most of the hot manifolds dont begin
> to strut their stuff until after the 2900 RPM range. Even if I go
> the 3.7 final drive I aint going to be there that much. By that time
> I am out of the sweet spot of the 455. Just a thought.
- --
Patrick Flowers
Mailto:patrick

The GMC Motorhome Page
http://www.gmcmotorhome.com
 
>
> In a message dated 10/12/99 3:20:31 PM Central Daylight Time,

>
> > Performer 455 intake is optimized for the low end,
> > idle - 5500. Check out the Edelbrock page. The Toro intake is terribly
> > ashmatic.
>
> I stand corrected. I dont know if I just missed that or what. Is it new?
> the last time I had looked at manifolds was 2 years ago.

Not sure how new - maybe less than two years.

> Now here is what I need to take a look at. Elderbrock says they
> have crossover plugs for the 455. They are part # 2733. Has
> anybody used them? Has anybody seen them? I am not going to buy
> any more without seeing them.

There's a tech email link at edelbrock.com - give 'em a holler, maybe
they will shoot straight with you. That's one reason I like their
aluminum heads - no crossover ports at all. Of course, that comes at a
price.

Patrick
- --
Patrick Flowers
Mailto:patrick

The GMC Motorhome Page
http://www.gmcmotorhome.com
 
How do you get the engine hatch to close with these intake manifolds?

I presume it takes a new hatch cover.

Mark

|
|Tom,
|
|I've also been thinking about my "dream" 455 using the Edelbrock heads.
|Any idea why they specify the "Torker" intake for use with these? I've
|been meaning to email them to ask - thought maybe you already had. I'm
|planning to use the "Performer" intake as it focuses more on the lower
|rpm(idle to 5500 iirc) range.
|
|Patrick
|

|>
|> I have just about decided to go with the new Edelbrock aluminum heads,
|> Performer manifold and fuel injection. See this"
|> http://www.tcsn.net/mondello/edelhds.html
|--
 
Some one was asking why the torker manifold was used with the edelbrock
aluminum heads. It is not except in high horse power street applications.
here are some words from the Edelbrock site:

Torker II=AE Manifolds (2500 to 6500 rpm):=20
The Edelbrock Torker II manifold is a single-plane, low-rise design that
works well for high-rpm, high-performance street applications. The low
profile of a Torker II intake is ideal for applications where hood clearance
is limited. A Torker II produces gains in top-end horsepower with adequate
throttle response. These manifolds are not mileage or emissions related
manifolds, they are only for high-performance applications.=20

Performer(TM) Manifolds (idle to 5500 rpm):=20
Performer manifolds are dual-plane, low-rise intake manifolds with a 180=B0
firing order and patented runner design that you won't find in other brands.
This patented design greatly improves torque over a wide rpm range,
especially off-idle through the mid-range. Throttle response is excellent.
Performers are ideal for passenger cars, trucks, 4x4s, tow vehicles and RVs.
There are EGR and non-EGR versions available for most domestic V8 and V6
engines. Most Performer intakes are 50-state street legal, when used with
the correct carburetor and in the correct application. Check the individual
listings for detailed information.=20

We need the horsepower and torque at the low end, ie under 2500RPM. The
torker does not even come on till that RPM.

>In a message dated 10/12/99 5:18:24 PM Central Daylight Time,=20

>
>> That's one reason I like their
>> aluminum heads - no crossover ports at all. Of course, that comes at a
>> price.
>
>Patrick
>
>Do you mean a performance price or the hatch problem? BTW how much
>does the hatch have to be raised? Gosh it just hit me. We are all back in
>high school. Here we are all talking about cams and manifolds. No wonder
>they add 15 years to your life expectancy. Now if they just did not add to
>the gray hairs-----or the loss thereof.
>
>Take Care
>Arch
>
>
 
Arch,

I remember reading in the Olds mailing list archives about a couple of
people that used the Mondello alloy and had it "disappear" (read melted and
went out the exhaust). This was on racing engines and happened after only
a couple of passes if I remember correctly. We had a similar problem with
the Edelbrock plugs (rather large cast iron pieces that you grind down to
an exact fit and insert into the heads) now provided with the Performer
intake to prevent intake cracking. These were a nice tight fit when we put
them in, but after about 14,000 miles, they had apparently loosened and
banged around enough to be about 1/3 their original size. Reading the Olds
mailing list archives, this also appears to be a fairly common
occurrence. It was reported there that welding (or tacking) in the
Edelbrock plugs worked well. This supposedly kept the plug in place which
prevented it from banging around and getting smaller and smaller. I don't
know how the heads would like being welded on though.

Zak

>In a message dated 10/12/99 3:20:31 PM Central Daylight Time,

>
> > Performer 455 intake is optimized for the low end,
> > idle - 5500. Check out the Edelbrock page. The Toro intake is terribly
> > ashmatic.
>
>Patrick
>
>I stand corrected. I dont know if I just missed that or what. Is it new?
>the last time I had looked at manifolds was 2 years ago. Now here
>is what I need to take a look at. Elderbrock says they have crossover
>plugs for the 455. They are part # 2733. Has anybody used them?
>Has anybody seen them? I am not going to buy any more without
>seeing them.
>
>Take Care
>Arch
 
Zak Mondello provides that service.

>Arch,
>
>I remember reading in the Olds mailing list archives about a couple of
>people that used the Mondello alloy and had it "disappear" (read melted and
>went out the exhaust). This was on racing engines and happened after only
>a couple of passes if I remember correctly. We had a similar problem with
>the Edelbrock plugs (rather large cast iron pieces that you grind down to
>an exact fit and insert into the heads) now provided with the Performer
>intake to prevent intake cracking. These were a nice tight fit when we put
>them in, but after about 14,000 miles, they had apparently loosened and
>banged around enough to be about 1/3 their original size. Reading the Olds
>mailing list archives, this also appears to be a fairly common
>occurrence. It was reported there that welding (or tacking) in the
>Edelbrock plugs worked well. This supposedly kept the plug in place which
>prevented it from banging around and getting smaller and smaller. I don't
>know how the heads would like being welded on though.
>
>Zak
>

>>In a message dated 10/12/99 3:20:31 PM Central Daylight Time,

>>
>> > Performer 455 intake is optimized for the low end,
>> > idle - 5500. Check out the Edelbrock page. The Toro intake is terribly
>> > ashmatic.
>>
>>Patrick
>>
>>I stand corrected. I dont know if I just missed that or what. Is it new?
>>the last time I had looked at manifolds was 2 years ago. Now here
>>is what I need to take a look at. Elderbrock says they have crossover
>>plugs for the 455. They are part # 2733. Has anybody used them?
>>Has anybody seen them? I am not going to buy any more without
>>seeing them.
>>
>>Take Care
>>Arch
>
>
>
 
>
> In a message dated 10/12/99 5:18:24 PM Central Daylight Time,

>
> > That's one reason I like their
> > aluminum heads - no crossover ports at all. Of course,
> that comes at a
> > price.
>
> Patrick
>
> Do you mean a performance price or the hatch problem?

Arch, that would be $$$$ price. The Edelbrock heads are around $1800 IIRC.

> BTW how much does the hatch have to be raised?

The heads don't require raising the hatch, but a new manifold will. I think
the minimum is 3 inches - Performer is 2 inches higher than "normal" 455
manifold and Toro manifold is 1 inch lower than "normal" manifold. All this
is from memory, but was recently discussed here.

Patrick
 
>
> How do you get the engine hatch to close with these intake manifolds?
>
> I presume it takes a new hatch cover.

Yep - new hatch is required. I've been fighting this for a while, but I've
about decided the hump in the cockpit floor is worth the combined benefits
of better breathing(engine, that is) and elimination of the crossover.

Patrick
 
>
> How are you going to block the crossovers?

By using the Edelbrock heads - eliminates the crossover completely(not a
patch), fixes the "weak valve" problem caused by the crossover passage, more
efficient head design and increased tolerance for lower octane gasoline.

Second choice would be to weld in the Edelbrock plugs.

My $.02,
Patrick
 
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