Here's what I have:

305 bored .030" /w stock LG4 (dished) pistons. World 305 heads. ~8.5ish CR.
Comp Cams 260H. (212 / .440")
Edelbrock Perf intake, stock Qjet, reworked.

Here's the exhaust:

Edelbrock TES headers, The LG4 specific kind (!!!), cheesey universal cat, feeding into a 3" cat-back exhaust through a high-flo muffler.

The TES 2.25inch ypipe collector thing and the cat I suspect are holding this unit back. I was ripping around with the stock cat with a hole in it for like 6 months. Hey, it sounded cool, until the hole got bigger and sounded way *******. I took the cheapo in-the-meantime route and through on the universal cat, but I can definitely FEEL the drag on power 4200+RPM.

So, I am thinking of snagging one of those flowmaster 3" Y-pipes, and doing a little fabbing with a 3" test pipe to meet the 3" i-pipe. The cat is not required here on pre-86 vehicles. Maybe my conscious will drive me to snagging a high-flow unit but whatever...

Anyway, worthy mod? Is this small "kink in the pipe" so to speak holding me back? I'm thinking chemistry principles, where the slowest stage in the reaction is ultimately what dictates the time frame, or in this case the horsepower.

Later,
Hype.

 

It's hurting you some, but if you have the LG4 single-snorkel air cleaner, that's probably hurting you just as much if not more.

I would be surprised if the Flowmaster would fit your TES. Edelbrock might sell you the proper y-pipe, though (not listed - check with their customer service). Or, get one fab'd by a shop.

------------------
82 Berlinetta, orig V-6 car, now w/86 LG4/TH700R4. 2.93 limited slip. 2-1/2" cat-back, ZZ3 intake, Accel HEI SuperCoil. AMSOIL syn lubes bumper-to-bumper. Daily driver, work-in-progress (LG4 CC system w/'87 LB9 block, ZZ3 cam, ported World 305 heads, Hooker 2055 headers, 3" Catco cat & 3" catback, restalled TC, Spohn SFCs).
57 Bel Air, my 1st car. '66 396, 9.7 CR forged TRWs, Weiand Action+, Holley 750VS w/4150 conversion, GK 270 cam, Magnum rockers, Jacobs Omnipack, 1-3/4" Hedders & 3" Warlocks, TH400 w/TCI Sat Night Special conv & Trans-Scat shift kit, MegaShifter, 3.08 8.2" 10-bolt w/Powertrax, AMSOIL syn lubes bumper-to-bumper. Idles smooth @ 600 RPM in D. Best 15.02/95.06 @ 5800' Bandimere (corrected 13.93/102.4 @ sea level).

 

I'm sure it is, but there's one thing about exahust I'm trying to picture... If there is one small piece of exhaust pipe that's 2.25inch, does it make the rest of the 3inch exhaust useless?. I'm trying to imagine a highway in which roadwork is being done for a short distance, compared to a longer distance... or a kink in a hose, as opposed to more than one kink.

b0nk.
Anyway, I'm running an edelbrock open air element, and hopefully the turboblister hood thing is drawing in some cool air.

later,
Hype.

 

Check out this post https://www.thirdgen.org/messgboard/...ML/002609.html for what Hooker said about the 1.9" opening in the ball coupling on their 2055 collectors.

I can only assume they know what they're talking about. To some degree, I can understand it since only one cylinder is flowing at a time at the collector. But, I also know what I'm going to do.

Your situation is a little different since the restriction is for all 8 cylinders. The 3" still helps, but not as much as it would without the restriction before it.