Hey, I have a '92 z28 with a 350 tpi, and i was wondering what headers would be the best to add on to it. Should I put headers on or waste money on something else? What will give me the most bang for my buck?

'92 Camaro Z28 w/350 Tpi
K&N air filters and flowmaster am thunder exhuast. The rest is stock!
13.9 @ 98.25 mph

 

.

 

Doing work on the intake side of the engine will possibly add some initial power, however, you will never get the most out of both your engine and new parts if you don't let it breath properly. If you are looking to only do one thing right now, I would say the a good cat back system would be the best place to start. Your car will pick up some power, sounds better, and look a little better if you use some nice tips. This can all be done for less than $300 in most cases. If you have a little more money this would be a perfect time to add the headers as well. However, be careful. While some headers, such as those from SLP, are very good they can be very very difficult to install and are very expensive. If you are looking for a good place to start, the Edlebrock TES headers are a very good deal for only around $300, and I would suggest getting them coated as well. If you do the headers back, you will notice a fairly large power increase. You can save a lot of money if you do all this work yourself. It is quite time consuming, but considering most shops won't install headers on these cars for less than about $500, it's a good deal. Hope this helped, if you have any questions feel free to write.

------------------
87 GTA 350 L98
K&N filters, beefed up TH-700r4, Accel Manifold, Ported Plenum and Runners, Fuel Press. Regulator 49.5psi, air foil, modified MAF, SLP cold air box, Hypertech Thermomaster chip w/160 thermostat, MSD 6AL and Blaster 3, B&M shift kit & megashifter, Moser Ford 9in Rear with Richmond 3.50 and locker, Edlebrock TES headers and Cat Back,Hotchkis setup in rear, Poly suspension and Koni in the front, relocated MAT, bypassed IAC,

Fastest ET's
Stock-0-60 6.8, 1/4 15.0 @ 94
Best-0-60 4.7, 1/4 12.8 @ 112
Norm-0-60 5.2, 1/4 13.2 @ 108

 

Sorry I didn't see that you already have a cat back. The headers will still be a good place to get going. You will notice some performance increase. Probably about as much as you noticed when you put on your cat back, in my opinion. The rear gears could also be a good option, you will notice much better short run et's. However, be weary of what rear you have. I am not sure what rear is in the 92, but if it's the same that are in the previous cars that dumb aust. 9 bolt they break quick, and any added stress back there could cause problems. Also don't go over board, no more than about 3.73. Anything more than .25 points higher will yield a nice difference. Another really good place to start would be a new air intake. Good luck.

 

I would spend the $300 or so that it costs to get a set of Edelbrock TES headres. Since you already have the cat-back on there, the headers will help dramaticly. They are probably worth a good .4 second decreaes in the 1/4 ET on your car!

------------------
1987 Chevy Camaro IROC-Z
L98 TPI 350 (5.7L)
TH 700R-4 Transmission
Borg Warner 7.75" 9 Bolt Rear End

Current Mods: LT4 HOT Cam, Comp Cams 1.52:1 Roller Rocker Arms, Edelbrock TES 1 5/8" Headers, Hooker 3" Aerochamber Cat-Back System, Performance Resource Chip, Accel Ignition Coil, Cap, Rotor, 8.8mm Wires, K&N Filters, JET TPI Air Foil, All Free Mods, Falken ZIEX Z-Rated Tires.

Best ET (w/o LT4 cam): 14.32 @ 97.7mph
(corrected for elevation)

Soon to Come: 7.625" 10 Bolt with 3.42s and Accel TPI Intake Base

 

a 92 350 TPI will already have 3.23s, I wouldn't mess w/ the gears currently since those aren't too bad at all (and it isn't cheap to do, especially if you pay someone else to install them).

I think headers would be perfect. That in conjunction w/ porting your plenum and installing an AFPR at the same time will really help. I have Edelbrock TES headers on my 87Z, and just finished putting a set on my brothers 86 IROC today. Good headers for the price. Install is kinda a PITA though.

------------------
Ray87Z
-Vortec headed 350.
86 IROC w/ a cammed 305 TPI.
Formerly Ray86IROC.
www.inter-scape.com/Ray

[This message has been edited by Ray87Z (edited April 01, 2001).]

 

.