TBI305Camaro

ok i was wondering what makes the edelbrock tbi intake so much better...i was looking down mine and it looks like its just two bores all the way down...is the TBI edelbrock more like a dual plane instead of just being straight bores?

V8Astro Captain

iTrader: (1)

The Edelbrock makes more low-end than most TBI specific intakes (which is about 4 of them). It creates alot of velocity, which is better for low end because the "lemming" effect of moving air tends to force itself into the cylinder at low RPM.

There is a trade off tho. Having used the Edelbrock I will say it's thrilling below 3800 RPM, after that the small runners hurt high-end. Of course, lots of plenum volume will hurt low-end and help high because there is a massive amout of A/F waiting to go in. My examples are to the extreme tho.

When you look down the Edelbrock, the two bores go right into a little place just big enuf to split off into 4 runners. My Holley is a big gaping cavern in comparison.

Some of you may know about the Taurus SHO's. They had two different intake tracts...one for low RPM and one for high. Now, alot of cars make use of this technology like some of the BMW's have this funky Nautilus thing inside the intake that is supposed to be "infinatly variable" intake runners.

Jza

lightbulb...

TBI305Camaro

you think the edelbrock is still worth it? id get a holley but there is no way it would clear my hood being 1 1/4'' taller than stock...what is the highest RPM the edelbrock should take? cant be any worse on high end than the stock one can it?

JokerRS

I just mentioned in another post that I use 6 grand as a shift point, but i did that with my stock manifold sometimes too.It's deffinently a step up from stock, but it's not huge.My exhuast mods gave me the biggest increase.

V8Astro Captain

iTrader: (1)

In my van it felt like it stopped trying at 3800. In fact, I would never rev it past 4000 rpm since it was pointless anyway. Yours may turn out to be different tho, since you have a roller cam with different specs than my flat tappet.

I think the Holley is too much for the stock cam (L05 truck) and stall. I put the intake on and it suffered a little. I just put the stall in and now I really want the cam because it's sooo mismatched. This was all big plan for a bigger cam tho.

JokerRS

My motor pulls strong to about 5300-5500, I take it to 6000 to keep my rpm's up on the up shift.I feel that with stock swirl port heads the edelbrock tbi manifold is enough. With a cam and better breathing heads it probably is a little restrictive. Just my opinion. I'm not an expert, just learning along with the rest of you guys.

Buck268

I have been thinking about a new intake manifold also, since I am gonna swap in a LT1 this spring or summer. Would it be worth the price for the edelbrock, if I put an LT1 with it also? I will be using a 1" spacer (it better clear hood) because I dont want to worry about ppulling the AIR untill I put headers in.

AJ_92RS

I've read numerous places that the Edelbrock intake does hinder flow above ~5000 RPM. It's really made for trucks. That what it was originally designed for.

Edelbrock recommends using the 3702 cam with that intake. Here are the specs.

Duration at .050 Lift: Intake 194° Exhaust 214°
Lobe Separation: 112°
Intake Centerline: 107°
Lift at Valve: Intake .398 Exhaust .442

It's a pretty lame cam. Kinda tells you a lot about Edelbrocks idea of what this intake will do.
That intake won't work on the LT1 heads.

AJ

Buck268

oops, I musta forgot to say CAM. lol LT1 cam swap.
*feels stupid*

JokerRS

You really need to look at your whole combo and match componants.
Will the Edelbrock tbi manifold feed a 305 with swirl port heads?
Yes, it will.
Would I use it with better flowing heads?
No, I wouldn't.
Is it better then the stock manifold?
Yes, it is.
Should I get a higher flowing manifold and slap it on my junk swirl port heads? I guess you can if you want to. I doubt you will gain any top end, and I know you will lose some low end. Especially on a 305.

I consider the LT1 cam mild performance, and it seems to work togather fine with the edelbrock tbi manifold I am runing. I guess it depends on what your intended use is. Mine's a daily driver that will probably never see the strip. I got alot more power over stock, with out losing my low end power, and it still gets good gas milage.

Buck268

So, do you feel the edelbrock manifold adds any thing? In your experience and opinion.

JokerRS

I installed mine the same time as the LT1 cam so I can't say how much you would notice by its self. I know it wouldn't be a large gain by it's self, but as part of a package it would contribute some gains. The sum of the whole package is greater then the individual componants.
Lets say headers add (x)hp and intake manifold adds (y)hp
If you install both your gain is greater then (x)+(y) because they compliment each other.Like wise if you install a LT1 cam in a otherwise stock camaro with a LO3 you wont get much good out of the cam.

I looked it over good before installing it and its better then the stock manifold. If your looking for peak hp on a dyno at 6000 rpm then its not the one to choose.I don't drive 6000rpm on a dyno, I drive back and forth to work, and it works just fine with my combo.You just need to think realisticly about how you are going to drive the car and where you normally need your power.

TBI305Camaro

i just some more power out of my daily driver only track racing it may see anytime soon is the 8th mile...just a novice division (cars have to be driven in from the street)

Chuck!

Well... if the Edelbrock doesnt flow well up top, which carb manifold would you guys recommend? I got an LT1 cam that needs to go in, and I'd like to try to open up the stock heads a little, or get a set of cheap cheap LB9 heads and try to open them up a little. Id like to shift at about 6k, so if the edelbrock wont flow well there Id like to match the heads/cam with something that will.

Silverado5.7L

Does anyone recomend a manifold other then the EdelBrock or Holley?

I know others are made, but do people buy them?

steve8586iroc

Wieand makes a good small block intake called Stealth. Summit part# wnd-8016. Wieand claims an rpm range of idle thru 7000. Now on a 305 you might lose a little on the bottom end but you will get it back in the mid range to the top end. There is another manifold they make called Action Plus and it has an operating roange of Idle thru 6500rpm. This maniflod is available with egr, Jegs part# 925-8000. Hope this helps.

Steve

mrr23

unfortunately, they are not TBI specific. you will need adapters to make them work.

steve8586iroc

My bad, I forgot to mention the adapter plate. I think I thought he asking about dual plane fourbarrel intakes.

Steve

Chuck!

Exactly what I was askin' I know I'd have to get that holley adaptor. It looks a little better deisgned than the turbocity one. The tc one looks like a piece of aluminium with just two holes cut in it. I could freakin' do that.

Need egr though...

steve8586iroc

Check this out again.

There is another manifold they make called Action Plus and it has an operating range of idle thru 6500rpm. This maniflod is available with egr, Jegs part# 925-8000. Hope this helps.