I've gotten my headers in but the performance isnt there. I know this arent the best headers in the world, but they should be better than the stock manifolds, right? The engine is breathing better but it feels like the power goes out at around 5Krpms
Anybody here did other adjustments to get the full advantage of these headers?
Fuel preassure, timing, etc...

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91 Camaro LO3 RS 5-spd
Open air element,
ACCEL 8mm wires w/cap n rotor,
K&N filter,
flowmaster,
TPI TES Headers and 3" I-Pipe
dual fans,
82 Glass hood w/ open vents,
removed grille,
16" Iroc-Zs,
Z28 wing

[This message has been edited by chevyguy8 (edited October 15, 2001).]

 

tehy are better. I noticed a difference. Your car is not going to make much power at 5k RPMs.

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89 camaro 305 tbi, flomaster 3 chamber cat back, gutted cat, Edlebrock TES Headers, Exhaust cutout, Edlebrock open element, 160 degree T-stat, Hurst Dual Gate shifter, Lakeland LCA's, and a Stage 2 FastChip.

2 kicker comp 12"'s, polk for the rest. Phoenix gold xs2300 to subs, kicker impulse 404XI to 4 speakers, pioneer DEH- P7000R head unit, and finally a 12 disc changer. Full leather interior from http://www.MrMikes.com

 

what size did you get? Maybe yours are too big?

 

your cam is holding you back. Thats why the stock redline starts at 4500 RPM. The cam is tiny.

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-Tas
'89 Formula WS.6

Got Beach?

 

The TBI isn't going to make power past 4500 rpm probably even with headers.

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"Rice burners are like tampons...Every pu$$y has to have one"
'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

 

I don't know about anyone else, but when I first put mine on, I thought it was the dumbest mistake I had ever made. After about 3-4 weeks, things got much better. I think they sometimes need a "break in" period. My buddy had the same thing happen on his truck. He didn't feel the full benefits of them until about a month after they had been on. Just give them some time, I'm sure you'll like them in the long run.

Matt

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irocet@hotmail.com

drive.to/Stang_Kilr

88 IROC-Z -- 350 L-98, 700R4, Flowmaster, Edelbrock Headers, Catco Cat, K&N, MAF Sceens Removed, Airfoil, March Pullies, Comp Cams Magnum 1.6 Roller Rockers, Bosch Platinum Plugs, Accel 8.8 mm Wires, MSD 6AL, Hypertech Cap & Coil, Hypertech Chip, Hotchkis Strut Tower Brace

 

Could this "break in" period just be the computer adjusting to the less restrictive exhaust? When I put mine on, I noticed right away a difference.

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'82 Z28
LG4 305 .030 over, performer intake, holley street avenger 670, xe 256 cam, tes headers, 3 inch single exhaust, spintech muffler, 14 x 3 inch drop base k&n.

 

Well, I don't know for sure what this "break in" period is to be quite honest. I do know that I have talked to a few people that have had that happen. One guy once told me something about the metals or something...I don't know. I guess I can't really explain, I just know that it happened to me.

Matt

------------------
irocet@hotmail.com

drive.to/Stang_Kilr

88 IROC-Z -- 350 L-98, 700R4, Flowmaster, Edelbrock Headers, Catco Cat, K&N, MAF Sceens Removed, Airfoil, March Pullies, Comp Cams Magnum 1.6 Roller Rockers, Bosch Platinum Plugs, Accel 8.8 mm Wires, MSD 6AL, Hypertech Cap & Coil, Hypertech Chip, Hotchkis Strut Tower Brace

 

Just another input.. on a friends 91 z28.. the same thing, about a month and the power came. On my chevelle..i installed hooker super comps with 1 5/8" primaries, noticed a huge gain right away. That computer assumption is probably correct

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1972 Chevy Chevelle "Malibu"
Hooker Headers, Flowmaster 40 series mufflers, accel 8.8 wires,Edelbrock performer intake Edelbrock Carb, Torque Thrust "D" wheels
Click here for my Malibu information
In Memory of #3 Dale Earnhardt

 

As far as the computer is concerned, it's not a bad idea to disconect the battery during any mod. This way it resets the computer. Our computers are pretty stupid but they DO learn, a little bit. I think they kept improving OBDI from year to year until they switched to OBD2. One thing's for sure, dfferent 3rdGens respond different to similar mods.

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1990 Formula
Factory:TPI-305/Dual Cat(230hp),5 Speed,3.42 rear.
Dealer instaled:Aluminum Drive Shaft
Mods:SLP air foil,K&N Filter, Accel:wires,coil cap,rotor.Hypertech Thermomaster chip,Stat,Fan switch,TES headers,MSD6AL,AFPR(50), Harwood fiberglass hood.
Flowmaster 3" Cat-back exhaust,TB coolant bypass,B&M Ripper shifter, Centerforce dual friction clutch, Ported & Siamesed Plenum matched to SLP Runners, March Power/Amp Pulleys, Richmond 4.10 gears. (???HP)

 

I dont know what i was thinking when i said 5k, i really just meant to emphasize the fact the power isnt there(at high rpms). i also have the 3in I-pipe and still there is something wrong for sure. Ill wait and see if this "break in period" its true, if not im still going to boost FP and mess with the timing.
By the way the headers are for a 305-350 TPI, 1 5/8s to 3in colectors.

------------------
91 Camaro LO3 RS 5-spd
Open air element,
ACCEL 8mm wires w/cap n rotor,
K&N filter,
flowmaster,
Edel. TES Headers and 3" I-Pipe(not installed), dual fans,
82 Glass hood w/ open vents,
removed grille,
16" Iroc-Zs,
Z28 wing

[This message has been edited by chevyguy8 (edited October 18, 2001).]