Hey guys i just bought Edelbrock headers for my 1991 Z28 350 tpi dual cats. Anyways anybody with the same car and engine as me have any good luck with it? I got it ceramic coated and got a lil discount on em. Also i read in some cases it will shave off a full second off your 0-60 time, is this even true? Edelbrock claims it.
Also i got em in the 1 5/8 size, is this good for a 350? I read there to small for 350s... And Edelbrock told me thats the only size they come in. Seems like theres not many headers for us dual cat guys..

 

Those are not headers, they are TES (tubular exhaust). Look at the ports they are actually smaller than the stock manifolds.
If you really want headers get someone elses.

 

well tell us what u run .. iwas thinkin of buying same one s thanks

 

SLP is the only one for 1 3/4"
Hooker makes a real nice 1 5/8" ....#2055's (too bad they don't make 1 3/4's) these fit real nice

 

Hedman makes a pretty nice 1-5/8 set too.

 

i bought those exact headers for my car, with no other mods then just a manifold to header swap, it shaved a .5 off my 1/4 mile time.

 

Really travis? Wow .5 with edelbrock headers? Very impressive! I have a Catback, Gutted Cats, airfoil the basic stuff, from what im hearin Edelbrock does make good headers and there much easy to install esp on 91-92 Z28s wit dual cats, You dont have to bend the headers or anythin, i herd you have to remove the steerin shaft tho... But also i read many dont like edelbrock, keep your opinion coming guys

 

Also travis also see you have a 1989 350 TPI, which was the 1st yr for dual cat option. Do you have dual cats???

 

Edelbrock TES and a high flow cat gained me 20hp and 20tq. Previous mods where performer intake, hooker cat, open element, Edelbrock carb.

The only thing I don't like is the Y pipe.

 

nice keep it coming guys, i need your opinions!

 

you are gonna need some new cats anyway so just make the switch to single and get a 3inch high flow carsound. i got one and didnt notice much difference between open y-pipe and a cat with a cutout. it just sounds quieter (which is a good thing)

btw see sig for mine

 

thanks for the info, do i really need to get new cats Man cant i just strait pipe it and weld it? Also is it true that Edelbrock claims it shaves a full sec 0-60 does anyone know this is true? If it was the case i be doing 0-60 in 5 sec flat:hail:

 

If you don't have to pass emitions or a visual, then just use straight pipes in place of cats if you don't wanna spend the money.

 

yeah thats what im gonna do, cuz emissions isnt a issue for me at all Adam, if you straight pipe the cats does have better airflow and have a better sound somwhat?

 

Then imagine what you could have got if you used something good LOL

PS
I'm still skeptical about that statement, knowing what I know about their quality.

(now climbing in to flame suit)

 

All I'm gonna say, is that when I gutted my cat, it did have a little more rumble, but not a huge difference. Power seemed about the same. This was a completely stock system at the time though.

 

well one of the reasons im gettin edelbrock is you dont have to dent the headers or anythin, yeah you have to remove the steerin shaft and that kinda stuff...

 

I had tes headers and chaged to slp 1 3/4 headers due to my supercharger and AFR heads. I do not think there was much difference between the two except quality! slp's are a nicer header by far. With my stock engine and the charger, it was hard to tell much if any difference, but I did not take it to the track to get a true reading of the change. Now, with my new AFR heads and LPE213 cam, the difference may be much more noticable. But I put my slp's on last year this time after the track closed Then, put my new heads/cam on after the first of the year. So I was unable to track the car to gauge the differences. I think you will be fine with the tes headers. Now, if you can afford to purchase the SLP's, I would definatley get them instead of the tes headers. They are a very nice part!

 

I didn't have to take my steering shaft completely out...just had to move it out of the way. Took 20 hours for the installation and I'm happy with them.

 

mine was a single cat car, and I hated the pieces of junk. the setup was about 4 years old (on the car when I got it) and the y-pipe was already so rusted thru that it broke in half!!! the hooker catback that was put on at the same time has light surface rust on it. Plus the design of the passenger side header wouldn't let me change the #6 and #8 plugs without taking the starter out, which I couldn't do without taking the y-pipe off. What an aggravating setup. The last nail on the coffin is when I took them off my car last week, and dropped the y-pipe like 3 feet onto the floor and it fell apart... I saw that the y-pipe necked down each secondary pipe to a D shape half the size of the 3" I pity anyone who paid money to get these. IMHO get the hookers. I'm going LTs and dual 3"

 

chevydude350ho, you must have some bad luck then....
Never had any problems with mine...but I'm very glad I get them JET HOT coated...the only way to go

 

I also run them the only thing I dont like about them it the 2 1/4 y-pipe

 

really?? that sucks

 

After getting my '88 GTA (5.7, automatic) back on the road in summer 2001 (after years of neglect by its previous owner and a year and half getting it back in shape on my part), I installed a set of Edelbrock headers.

Before sending them off to be jet coated, I cut off the smog tubes, welded the holes, and most importantly, I "ported" the tubes from each cylinder. The factory welds inside the tubes were terribly done and looked as if a blind person tried to do the welding.

The factory welds were then ground out (by me) to the size of the ports in the heads.

When I got them back from Jet Hot and on the car, even with the compromised "D"-shape y-pipe, I felt a very noticable increase in power. But to be fair, I did leave off the cat and installed a new Edelbrock cat-back system at the same time.

Best time with the Edelbrocks at the track was a 14.07 at 99.3 mph. The car has the stock engine, other than 1.6 roller-tip rockers, fresh rebuild in '99, 3-angle valve job, and pocket porting. Stock cam, pistons, tpi intake (other than gasket matching), home-made cai, etc.

Knowing the small header tube size would be restricting my future plans, I bought and installed a set of coated 1-3/4" SLPs.

The car was then run at the same track under much the same conditions and my time went from a 14.07 to a 14.02 at 99.6 mph.

Not much difference for the money.

I also felt a loss of low end power, not much-but noticable.

I dynoed the car at 224 hp at the wheels (302 torque) with the SLPs. I didn't get the Edelbrocks dynoed.

My opinion on the Edelbrock/SLP comparison: If money is a major concern right now, get the Edelbrocks and clean (grind) out the welds inside the tubes.

If quality and looks are your main concern, get the SLPs.

I found little difference between the two brands on installation or plug changes.

Just my opinion.

jms

 

thanks JMS, I want it is a more deeper sound and better flow. What did you run Bonestock???

 

If moneys a concern, get Hedman's 1-5/8" shorties. They are really cheap, and better than the Edelbrock TES. The Hedman Y-pipe is better too, you just have to cut off the I-pipe peice they weld on, because its only 2.5". I cut my Y-pipe off in the middle of the collector to get a 3" opening. I'm just going to have a new exhaust welded to that now. The nice thing about the Hedman Y-pipe though, is that the 2 pipes coming off the headers aren't crushed down to fit into the "Y".

 

When I got the car in '99, bonestock it ran zip, zero, nada, zilch.

During the rebuild/refurbishing process, I went ahead and put on the TES system because the stock system was totally shot, rusted, dangerous--you get the point.

The Edelbrock cat-back still on the car has gotten louder, deeper (at speed) over the years. At idle, the car is not very loud but when revved sounds nice. I've heard several other systems and some are too loud for my 48 year-old ears. I, myself, would replace my cat-back with another Edelbrock if I should need to.

Its all personal opinion.

jms

 

keep em coming guys, if you anyone has edelbrocks on there 350 Tpi or 305. It be really helpful

 

i have had edelbrocks for years and had no problems. people say that for a 350 it is better to go with 1 3/4 headers, but if you are gonna keep your 350 even somewhat tame, the 1 5/8 headers will do just fine. the steering shaft thing is a real hit and miss deal. mine clear by a mile, but my buddies 1 3/4 SLP headers on his GTA hit the steering shaft by quite a bit. SLP claims it is because of worn and sagging motor mounts.

 

yeah im gonna keep my engine stock, so i think the 1 5/8 will just be fine. Do you notice power 1meanZ?

 

I had the tes headers and thought they were a pretty well built peice. With my old TPI motor with several boltons and a small cam the car ran 13.7 @ 99.5 pretty consistant. I switched to Heddman LT's (not as good quality, flange is a joke) and ran 13.7 @ 99.9...pretty minimal gains for the work. Grind down the welding flash on the flange area and run the edelbrocks. I am running over 120mph through 1 5/8 primaries N/A. This is proof that a 1 3/4 header would be overkill for several on this board.

 

i agree with IROCFAST. 1 3/4 primaries are just way too big unless you have a big inch or high horsepower motor.

Nick418, i did the swap years ago when the car was bone stock. i noticed a pretty good gain in midrange and upper end power, that is untill the TPI quit flowing at about 4800rpm. very bottom end there was no gain. i woud say for anyone looking to make any power at all, headers are almost a must, and i think with a little prep work, the edelbrocks are just as good as any header out there for a reasonable price.

 

yeah i just recieved my EdleBrock Headers today, and man they look really good. Cant wait to install them this weekend

 

Also does it add 25hp when i install my Brocks? How much Torque u thinkk ill gain?

 

check out my sig. im running those times with a set of uncoated edelbrock headers, a test pipe in place of the cat, and a flowmaster american thunder exhaust. I know that shorty headers are holding me back now, but you can go pretty far with the edelbrocks. I had this same exhaust setup when my motor was totally stock and went 13.8 at 98mph. I think youll see a decent improvement with them.

 

im gonna try to post some pics of the headers tomorrow

 

Well i just got home from installing them all day. And boy do they sound good, i added the headers and straight piped the cats and gave me that really nice deep tone. My dads Mechanic, dad and I did it and took us about 7 hours to do it.

 

I'm thinking of getting those headers for my 305 TPI. How bad was it installing them?

 

ehh, there kinda a pain in the ***... Esp on the Passenger side with all the emissions and its hard to get some bolts on... There great headers though

 

Was the steering shaft a problem?

 

nope didnt even hav to touch it

 

I had a TES setup.... but nothing compares to the full length tubes that I ended up using after all was said and done.