SouthFL.02.SS

I'm planning my next lsx build up.
I was extremely happy with the 1 3/4" QTP HVMC LT's I had on my old car (happy with their performance gains over SLP LT's, their quality, etc.), but I don't think I'll be paying out a grand for headers again.

The Edelbrock 1 7/8 to 1 3/4 stepped headers with Ti-Tech finish from SDPC look great.
I've seen a few posts about them (including one guy who promised back to back dyno comparos- but never posted the results), and I'd like to know if the users are happy with their purchase.

-How many bought the slip on merge collectors? Did you have them welded locally?

-Does the 3 1/2" collector merge down at any point? (3 1/2" is pretty wide).

-How did the LT's fit? The Y-pipe looks good too. How did that fit?

-Any dyno results?

-Are the O2 bungs already there, or did you have to have them tapped at a local shop?

Many thanks.


****Edit: These are the two kinds available (after being informed by fellow members, thanks).

Fully welded (collector comes welded, O2 bosses already in):



Slip on merge collector (has taper and velocity spike, O2 bosses must be installed, up to you if you want to weld the slip fit collector locally):



And this is the Y-pipe:

Bryan @ Speed Inc.

iTrader: (19)

i'm pretty sure the o2 bungs come on the headers. the slip on collectors i've heard people not welding them and having no problems.

i'm also considering these stepped ti-tech coated headers to upgrade from my flowtechs.

Steve Burger

iTrader: (33)

FedEx should be dropping mine off today. I got the merge collectors. I won't have any results for a while. Old motor is out and new one is not ready yet.

JNorris

iTrader: (4)

I bought the welded on collector version. It is said that the slip-on collectors do not leak but I did not want to chance that. This version of the header has the O2 bungs welded on the collector.
The 3-1/2” collector slips into the Y-pipe and it tapers down to 3” You will have to have the O2 bungs welded on the Y-pipe.

The header and Y-pipe install was easy. The headers slipped right in from the bottom the Y-pipe fits well although it was kind of tough getting it to slip on the collectors but after about 10min of pushing it back and forth it went on. The headers and Y-pipe tuck up well but having a 3-1/2” collector they do hang down a bit.

I will post some pictures of the headers installed on the car.

Overall the fit and finish of the headers is good. I have about 200 miles on them and the Ti-Tech coating is still looking great.


John

SouthFL.02.SS

Thanks John! I read your thread from a few days ago. They do look like a great header for the price.
So, the fully welded version comes with 02 bungs in the collectors already. That's good to know. How about the other slip fit kind? Do those have bungs?
The 3 1/2" diameter at the collector also worries me with regards to losing some ground clearance.

SouthFL.02.SS

I checked out the Edelbrock website. Mentions bosses for the fully welded version, but doesn't mention anything about bungs on the slip fit merge.

Victor Series Drag Race Headers
NOW AVAILABLE WITH NEW TI-TECH FINISH OR CERAMIC COATING
These new drag race headers have innovative features to maximize power potential in competition. They are engineered with the correct firing order pulse sequence in the collector, unlike most competitors' headers. The 3/8" thick laser-cut flanges are robotically welded and contoured for a perfect fit. New fully welded headers include O2 sensor bosses and collectors for a no-leak installation right out of the box. Headers with slip-on merge collector feature an expansion cone on the exit of the collector. The slip-on design allows for tuning the primary tube lengths to individual engine requirements. Collector retainer brackets and scavenge tubes can be welded on after header tuning has been completed.

Ti-Tech Finish Ceramic Coated
1998-99 Camaro/Firebird with LS1, fully welded
(1-3/4", stepped to 1-7/8", 3-1/2" collector, mild steel) #65653 #65652
1998-02 Camaro/Firebird with 5.7L LS1, slip-on merge collector
(1-3/4", stepped to 1-7/8", 3-1/2" collector, mild steel) #65703 N/A
2000-02 Camaro/Firebird with LS1, fully welded
(1-3/4", stepped to 1-7/8", 3-1/2" collector, mild steel) #65683 #65682

JNorris

iTrader: (4)

You have to have the O2 bungs welded on the slip-on merge collector version.

Here are the pictures of the headers installed on my car. As you can see there is some loss of ground clearance but my Spohn torque arm attaching crossbar is still the lowest point under the car.

SouthFL.02.SS

^
Very Nice!

Haans249

iTrader: (24)

I've got maybe a stupid question....but, aren't the front O2 sensors, and the rear O2 sensors supposed to read different values? And aren't you supposed to eliminate the rear sensors if you don't have any cats because they are supposed to read differently? I just don't see why you would have 2 O2 sensors on the same stream measuring the same thing...doesn't make sense if you ask me...

Regards,
Adrian

SouthFL.02.SS

We need the front 2 O2 sensors (the ones on the header collector).
The rear 2 O2 sensors on the Y-pipe can be deleted.
The slip on merge collector of the Edelbrock LT's doesn't provide bungs for the front 2 O2 sensors. They must be tapped and welded on (not a big deal, just another thing to do). The fully welded version of the Edelbrock LT, as I just learned, has them provided already (as do 99% of LT's available for lsx engines).

JNorris

iTrader: (4)

I needed the O2 sensor bungs in thr Y-pipe for my wide band O2 sensor.

John

z-ya

iTrader: (1)

The fully welded version is not a merge collector design,only the slip on collectors
are merge collectors.I have a set of the slip on type headers and they fit very well.
I had all the welding done and then had them coated locally.I can't verify the performance gain as cam and heads were changed at the same time.

SouthFL.02.SS

Any pics from underneath?

SouthFL.02.SS

I can have them welded locally- just guaging if it's worth the process.
Does the slip on collector taper down in diameter at any point? This would help velocity I'd think.

So, the fully welded collector looks like your typical collector (i.e., hooker LT's). While the slip on has a pinch in the collector, plus it merges the 1 7/8" tubes in a more fluid design?

Steve Burger

iTrader: (33)

Slip on collector does tapper down. There is also a spike in the collector to control scavenging. Got mine yesterday. I am impressed with the quality.

SouthFL.02.SS

Very nice. Thanks.

SouthFL.02.SS

Ok;

Slip Fit:


Fully welded:

ArcticZ28

iTrader: (14)

Yep, I just got the slip fit's put on my car. Used clamps to hold it together, not welding. Sometimes welding these things at the Y causes leaks (I know, ironic) but I got the info from a guy that's done a good amount of them and he says you should try the clamps first.

SouthFL.02.SS

^

Wait, are we talking about the same thing here?

When I say "slip fit", I'm not referring to the connection from the Y-pipe to the header collector in this case.
I'm talking about the header collector being slip fitted up to the primaries.

WS666

iTrader: (14)

I knew you would be back