ok how does this sound with my ****, I ahve two ideas.

(#1) Hooker Headers, "true dual exhasut" 3 inch tubing, 2 high-flow cats or gutted, and 2 Flowmaster 40 or Spintechs behind the cats with 2 3inch diameter 1 foot echo tips.

(#2) Hooker Headers, 3 inch tubing, high-flow cat or gutted cat, and Flowmaster or Hooker Cat-Back, with 3 inch diameter 1 foot echo tips.

Any suggestions, is the 3 inch tubing too much, would it not give me enough back-pressure? I need this cat to pur loud and aggressive yet still run like it sounds.

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87 FireBird Formula
305 4bbl LG4
K&N Filter
Flowmaster 80 Series
Holley Quadra-Jet 650 CFM 4bbl Electronic Carburetor
P215/65R15 Tires
-----Need Upgrades-----
--Give suggestions plz--

http://members.tripod.co.uk/michigan34/car.html

 

too big for the lg4. It might sound nice but the exaust scavaging effect will be crap. Forget about back pressure. You don't need or want backpressure. You want the right size pipe to help your exaust scavange.

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-Tas
'89 Formula WS-6

305, TBI, 700R4, P.A.W. 14x3 open element with K&N, Milodon 160* thermo, functional Formula hood, cross-flow Flowmaster, '99z28 rear pipes and tips, Hooker 1-5/8" 50 state legal headers, Dynomax 3" I pipe (PN 44063 and 43248)
Super GRK_Taz World
F-Body Dual Exaust
EFI & Intake Options

 

That dual 3 inch will definately be too much, but the single 3 inch might be an ok idea if you plan future mods. I would go with the Hooker cat-back if you plan on a cat-back.

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"Putting any amount of money into a RICE BURNER is like wiping your a$$ with a turd. "
'86 IROC
T-TOPS, TINTED WINDOWS, BRAKE LIGHT BLACKOUTS
GM GOODWRENCH 350
EDELBROCK TES HEADERS
3" Hooker CatBack w/Aero Chamber muffler
EDELBROCK 600CFM CARB.
KN AIRFILTER
ACCEL HEI DISTRIBUTOR
160* Stat, just switched to 180* b/c of winter coming and going to college in the mts.
3:73 Posi
Rebuilt 700R4
B&M Megashifter, 5" Autometer Tach w/shift lite

 

how do I find the correct...scavvange or whatever?


------------------
87 FireBird Formula
305 4bbl LG4
K&N Filter
Flowmaster 80 Series
Holley Quadra-Jet 650 CFM 4bbl Electronic Carburetor
P215/65R15 Tires
-----Need Upgrades-----
--Give suggestions plz--

http://members.tripod.co.uk/michigan34/car.html

 

What Hooker headers are you considering getting?

Generally speaking, 1-1/2" primary long-tube headers are fine for a 305 or torquey 350. For a 350 that will rev a little, you want 1-5/8" primary long tubes.

For your typical shorties, the picture changes a little. Since the primaries aren't "tuned" length-wise, the issue becomes flow. Now, you're looking at 1-5/8" primaries for a 305 or torquey 350, 1-3/4" primaries for a rev'n 350.

Unless you do more to that 305, 1-1/2" primary shorty headers would do fine. Get it spinning a bit more, you'll probably want 1-5/8".

So, what Hooker headers were you considering getting?


Oh, lose the echo tips.

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82 Berlinetta, orig V-6 car, now w/86 LG4/TH700R4 (restalled TC). Ported World 305 heads, Crane PowerMax cam. ZZ4 intake, oil pump, pan & baffle. Accel HEI SuperCoil & module. Hooker 2055 headers, 3" Catco cat & 3" catback w/dual-opposite Flowmaster. 2.93 limited slip, Spohn SFCs. AMSOIL syn lubes bumper-to-bumper. Daily year-round driver. Best ET, speed TBD...
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 @ 700 RPM in D. Best 15.02/95.06 @ 5800' Bandimere (corrected 13.93/102.4 @ sea level).

 

What is 'scavaging'???

 

Well, I want to save a little money cause I dotn have a big budget, so arent shorties more expensive? If so I want to go with teh regular headers with 1 1/2"

------------------
87 FireBird Formula
305 4bbl LG4
K&N Filter
Flowmaster 80 Series
Holley Quadra-Jet 650 CFM 4bbl Electronic Carburetor
P215/65R15 Tires
-----Need Upgrades-----
--Give suggestions plz--

http://members.tripod.co.uk/michigan34/car.html

 

Go for the true duals! That's the same set up I am using (hi-flow cats and Borla XR-1 sportsmans). But use 2 1/2" pipe. 3" is too much for a 305.