Edelbrock Intake Fails

[Adam]

If you haven't heard GMHTP dyno tested the edelbrock lt1 intake.

They have internal measurements and dyno results.

Plenum volume= 3670cc (stock) VS 2632cc (Edelbrock)

Runner Length= 2.780in (stock) VS 3.200in (Edelbrock)

Runner Cross-Section
At Gasket = 2.27sqin (stock) VS 2.32sqin (Edelbrock)
At 1.30in = 2.11sqin (stock) VS 2.26sqin (Edelbrock)
At 2.70in = 2.21sqin (stock) VS 2.52sqin (Edelbrock)

Peak HP 350.4 (stock) VS 346.8 (Edelbrock with 48mm) VS 350.3 (Edelbrock with 52mm)
Peak TQ 386.7 (stock) VS 387.7 (Edelbrock with 48mm) VS 391.3 (Edelbrock with 52mm)

Now you must ask yourself, is 4rwhp worth $465?

[Fixxer99TA]

Someone brought up a good point before though, I think they tested it on regular LT1 heads and its "supposed" to be designed for the Edel RPM heads. So will they gain anything on the next installment with the Edel heads too? You decide...

[SnyperBob]

Wow, that's weak! May do better with the other heads, but how much do those cost?!

[Fixxer99TA]

Too much for not enough gain :D

[Adam]

$465 for the lt1

[SnyperBob]

The heads are $465? That's not bad...

$465 for intake, $465 for heads....might be worth it

[Fixxer99TA]

Is it $465 per head? or for both?

Or do you mean the intake itself (never looked either up, never had to lol).

[SnyperBob]

I think he means $465 for the intake. That's what he had listed in the OP

[Adam]

My mistake.

$465 for the intake
$564 PER head

[SnyperBob]

ah, okies

[phantomzer0]

My mistake.

$465 for the intake
$564 PER head

Holy shit, You better be making alot more HP than fucking 4 for that much dough.

[Fixxer99TA]

Thats what I was saying...

Thats alot of spank for not much in return...

[Fastbird]

I saw this and was AMAZED that GMHTP actually put forth honest coverage on the product. I think the think hurting the manifold is the lack of plenum volume as compared to the stock manifold. That's a third less volume than stock and it's expected to outperform?? Not likely. I'll stick with my ported LT4.

[VendettaV8]

Holy shit, You better be making alot more HP than fucking 4 for that much dough.

Well on the test it was with stock heads, so just the 465$ was spent not the extra 1200$ on heads. ;)

[lt1_rx7]

When I read about the intakes, I figured you would look more for a torque gain with the longer runners than you would be looking for a horse power gain...but that doesn't seem to be very much of a gain either...stock intake FTW!

[Fixxer99TA]

I am honestly waiting for the guy that goes by the name "GGPC" on Ls1tech.com, that intake is going to be the stuff... 300cfm right off the bat I think it was? And still can be ported further before you even get it?

I can wait.

[KissMyWhtSS]

Hopefully they'll put that LT1 intake back on with the new heads, run it, then throw the Edelbrock intake back on to see what it does.

[Keys Z28]

I really wish this post would have came up about a month ago or so....:( But anyways it does look nice under the hood but other than that bummer.. I guess I didn't need that money anyways lol.

[94Blackbird]

Ok, heres the thing. They swapped intakes, that's it. The edelbrock piece was designed as part of a package. You can have the most blingin' solid unobtanium anything, but if you don't have the parts to back it up, then it won't perform like you expect it to. Put that manifold to a set of heads and a cam specc'd for the set up, and I'm certain you will see much more gain with the edelbrock piece over stock. It's not just about the parts people, it's the whole package and how it works together
@Fastbird (http://ltxtech.com/forums/member.php?u=2)- :laugh: :shiner:

[jaysz2893]

Door stop popo8

Holy old thread

Sent from my DROID RAZR HD using Tapatalk 2

[94Blackbird]

Door stop @popo8 (http://ltxtech.com/forums/member.php?u=1330)

Holy old thread

Sent from my DROID RAZR HD using Tapatalk 2

:finger::D

[popo8]

I love my door stop!!!!!


Haahah....




Co-Owner/Admin @ LTXtech.com

[Soxxpuppet]

I read this entire thread just to find out that its 5 years old :embarassed:

[firebird_1995]

Lol yea fastbird unknowingly challenged blackbird to resurrect the oldest post known to this message board, and he found it.












And I know this cause I looked! Second oldest was a day later.

[Viper]

The plenum volume is large enough on the stock manifolds ported they out dyno the Edelbrock. In this article the thing that made big 4hp was the addition to the Edelbrock package of a 52MM throttle body good for 4HP over the Edelbrock heads/cam stock manifold and throttle body. The larger intake manifold runner and plenum volume made Horsepower peak 200RPM higher. The Edelbrock cam heads intake for LT1 isn't as good as the stock heads and intake reworked and the GM hotcam is better than the EB.

http://www.gmhightechperformance.com/tech/0901gmhtp_edelbrock_lt1_cylinder_head_cam_intake_m anifold_test/viewall.html


Edelbrock intake v stock intake with stock throttle body the Edelbrock lost 4hp and made 1ft lb more torque added a 52mm throttle body Edelbrock still .1 less HP than stock manifold with stock throttle body solution add 52MM Throttle body to stock manifold. The larger runners and plenum volume kill power unless running real high RPM or Cubic inches 383 396 406 etc. Key is getting highest flow with the smallest runners.

http://www.gmhightechperformance.com/tech/0811gmhtp_edelbrock_rpm_air_gap_lt1_intake_manifol d_testing/viewall.html



http://www.camaroz28.com/forums/lt1-based-engine-tech-9/gm-high-tech-perf-tests-edelbrock-lt1-intake-632884/



Here a ported LT1 intake whoops the EdelBrock intake by 6.6HP velocity not volume of flow.

http://www.gmhightechperformance.com/tech/0902gmhtp_lt1_aluminum_rocker_arms_and_58mm_thrott le_body_upgrade/porting_edelbrock_intake_manifold.html



Take a look at the casting blobs and restrictions inside the EB.

http://ls1tech.com/forums/lt1-lt4-modifications/1273177-edelbrock-airgap-port-work-before-after-plus-random-lt1-intakes-we-ported.html


The Edelbrock heads have smaller ports etc than stock and their published numbers for Flow didn't prove accurate According to Lloyds Elliots Flow Bench Night Train66 post # 2
The Edelbrocks are supposed to flow 240cfm Lloyds tests 164cfm at .500" lift 168cfm at .550" lift stock LT1's average 206-212cfm at .500" lift.
Elliots work is quality look carefully he even chamfers the edges on all his heads intake runner openings exhaust openings and the combustion chambers.

http://www.ls1lt1.com/forum/lt1-|-lt4-|-l99-engine-tech/32011-stock-gm-heads-vs-patriot-edelbrock.html



One last article on EB LT1 package note the FLow bench used to test the heads in this article was very generous reporting more flow(10-20cfm) for all 3 cylinder heads EB,LT1,LT4 than is normal. Also wonder if their dyno isn't generous too. They put 283HP to the rear wheels with EB heads and cam. Bolt on cars done right will whoop on that.

http://www.popularhotrodding.com/enginemasters/articles/hardcore/0412em_edelbrock_performance_package/viewall.html


Maximize Profit Maximize shareholder wealth.

[firebird_1995]

I know this is an old (really old) thread that was just resurrected as a joke but I just gotta say, I've lost all respect in magazine dyno tests. Im not talking about this one in particular, but all of them in general. If there is an advertisement for the manufacture who's parts are on the dyno are anywhere in the magazine, rest assured the columnist is going to tip toe around if the results are lackluster. The edelbrock intake test is a good example. It made less power than the stock intake with the same tb, so rather than leave it there and say "well you know what, it just wasn't beneficial" they put a 52mm tb on it. And it made enough power to show a "gain" to the readers. But what would have happened if they put the 52mm tb on the stock intake? Instead they say well the lack of gain could be due to the fact it was made for the edelbrock heads, so they test it. IIRC the edelbrock hci WITH 52mm tb made 10 HP more than the edelbrock head and cam with stock intake AND stock throttle body. Put the 52mm throttle body on the stock intake if you want an apples to apples comparison. You know why that didn't happen? If they were to print anything that was less than flattering for the manufacture, they could kiss goodbye to any free parts or kickbacks they were getting, not to mention the potential of losing incoming revenue from advertising should they decide to go that far.

And its not this edelbrock test, there are others that jerk the reader around. I just can't stand it. :mad:

Edit: i just noticed ^we basically said the same thing. I type too slow.

[Paulster2]

I'm not to big on the EB head/cam packages either. The main positive thing I can say about them is they work well together ... they will, however, never out perform a well pieced setup.

As for the magazine results, I agree with both of you. I like to read the mags for the general topics, but take a lot of results they produce with a grain of salt. Is it the end-all-do-all of the automotive world? Not a chance. They do, however, give great ideas and I love the swimsuit issue! ;)