Looking at my mods listed in my signature, about how much gain can I expect with the addition of Heddman shorty style headers.

------------------
---Grady---
1984 Berlinetta.
LG4 305
Holley #1850 600 c.f.m. carb.
Edelbrock Performer intake.
TH-700R4 tranny.
Flowmaster 80 series/ 3" cat-back pipe.
Accel Superstock Coil.
7.5 10-bolt rear/ 3.08's.
Edelbrock Pro-flow air cleaner.
Pioneer head unit, Pioneer front 4X6's, Cerwin Vega rear 6x9's.
Daily Driver.

Personal Quote: "All American Racing, Slappin The Japs"

 

30HP?

------------------
-Tas
'89 Formula WS-6

305, TBI, auto, 14x3 chrome flat based open element with K&N, Milodon 160* thermo, functional Formula hood, cross-flow Flowmaster, '99z28 rear pipes and tips....

To be installed eventually far far far into the future: Yours if the price is right and I don't have to ship :
Hooker 1-5/8" 50 state legal headers, Dynomax 3" I pipe (PN 44063 and 43248), Catco 3" cat, and injector spacer.

Super GRK_Taz World
F-Body Dual Exaust
EFI & Intake Options
AOL IM: superGRtaz

 

There's no way to give you a number. Every engine is different and every header is different. Just know that you WILL see an increase in power with the addition of headers.

------------------
1991 Camaro Z28
5.7L 5-Speed (originally 305)
317 RWHP, 418 RWTQ
13.23 @ 107.62 MPH
Southern California
Member: SoCal 3rd Gen F-Bodies
Member: SoCal F-Bodies
-=ICON Motorsports=-

 

hey trigger- dumb question- did you have to do anything to your tranny when you put on the holley??? and Is your 84 berlinetta white?? does it have every option except the rear window defogger??

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'84 Berlinetta, LG4, 700R-4, starwars interior, falling headliner, T/A t-handle shifter, trans cooler, more to come in time and $$ www.hipergp@aol.com

 

Did you change your distributor as well when you got the Holley?

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'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
3:73 Posi
Rebuilt 700R4
B&M Megashifter, 5" Autometer Tach w/shift lite

 

Nope the transmission shifts fine after I got the new carb. My car is a black one, all the options including the rear window defogger.


------------------
---Grady---
1984 Berlinetta.
LG4 305
Holley #1850 600 c.f.m. carb.
Edelbrock Performer intake.
TH-700R4 tranny.
Flowmaster 80 series/ 3" cat-back pipe.
Accel Superstock Coil.
7.5 10-bolt rear/ 3.08's.
Edelbrock Pro-flow air cleaner.
Pioneer head unit, Pioneer front 4X6's, Cerwin Vega rear 6x9's.
Daily Driver.

Personal Quote: "All American Racing, Slappin The Japs"

 

Oh yeah, you got to if you want to get rid of the computer. I've got a vacuum advance on there,,,works great, no timing problems at all.


------------------
---Grady---
1984 Berlinetta.
LG4 305
Holley #1850 600 c.f.m. carb.
Edelbrock Performer intake.
TH-700R4 tranny.
Flowmaster 80 series/ 3" cat-back pipe.
Accel Superstock Coil.
7.5 10-bolt rear/ 3.08's.
Edelbrock Pro-flow air cleaner.
Pioneer head unit, Pioneer front 4X6's, Cerwin Vega rear 6x9's.
Daily Driver.

Personal Quote: "All American Racing, Slappin The Japs"

 

maybe 15-20, not sure exactly but a noticeable difference.

------------------
87' Camaro Z28
305 TPI
Stage 2 hypertech chip
160 degree thermostat
Custom ram air w/K&N's
air foil
shift kit
aluminum driveshaft
posi
VST gas ryder gas shocks
3" flowmasters
Vortex cherry bomb high flow muffler