boldguy

Hey guys this is my first post here, after a year of not posting and trying to get my account right. I am also a member on camaroforums as "Goodfella", but im looking to get more and this forum sounds good. i am in the process of modifying my camaro as many of us are, and the next thing on the list is a new cam.
I need help deciding though......
the car:
-1992 350 TPI
-9.3:1 CR
-Edelbrock shorty's, Flowmasters, stock cats
-Accel kool blue filter (with ram air induction ws6 style hood)
-5 Speed Manual Tranny
-3.43 Gear Ratio
-30 LB injectors, yes a little over kill but i didnt make the choice.
-TBI Chips tuned computer chip(piggyback style)
-stock heads and internals
-Use: daily/street mod.
the other day i gave all this info to the tech guy at CompCams and they suggested this one to me but it is a big jump from stock, so i also provided a couple of alternative choices.
heres the stock cam specs that i think i have ...
stock specs VS COMPCAMS 08-503-8 Cam
Lift IN .413 .503
Lift EX .428 .510
Dur IN 202 224
Dur EX 207 230
Separation 114.5 112


1. This one is a little smaller than that one, but it still seems like a big jump from stock.
TPIS
ZZ-9 Hydraulic Roller: IN/EX
Advertised Duration 282/ 287
Duration at .050 212 /226
Gross Lift .483/.520
Lobe Separation 112

2. Heres another one from Lunati that i was considering
prolly the most realistic

LUN-501A3LUN
Advertised Duration IN/EX: 284/284
Duration @.050 IN/EX: 218/218
Gross Valve Lift IN/EX: .492"/.492"
Lobe Sep Angle / Intake Ctr Line: 112/106
Valve Lash IN/EX: Hyd/Hyd RPM Range: Idle-5500

3. another one i found...
LUNATI
Parts & Kits for 54778LUN
Advertised Duration IN/EX: 258/268 Duration @.050 IN/EX: 206/215
Gross Valve Lift IN/EX: .469"/.489"
Lobe Sep Angle / Intake Ctr Line: 112/108
Valve Lash IN/EX: Hyd/Hyd RPM Range: 1200-5000

I am looking for a cam that is forgiving for daily street use with great power/torque in the low to mid range as well as some power gains in the high end. Possibly a noticeable idle diff that is still driveable on a stick car.

Which one would you guys suggest?
Thanks for the help!

BMmonteSS

You have a 730' ecm which is a speed density setup and the choice ECM for guys who want to go a little wild with their F-bodies. The downside is that any changes you make need to be accounted for in the chip.

The "TBI chips" prom really isn't a piggy back, that is just the adapter that bypasses the stock chip and allows the other circuitry in the memcal to work.

As for the best cam for your combo, thats a tough question. I can say that the cam comp suggested is a bit big for a LTR setup. You want to make all your power by 5500 rpm. The comp cam won't really come in untill 3500 to 4000 rpm and want to shift at over 6000 rpm if it had a high rpm oriented intake.

The zz9 is probably your best bet. It will make good power to 5800 and the LTR setup will help pump up the bottom end to cover up the laziness of the cam. You'll end up with a big fat wide power band that will really move the car down the road. I would choose the zz9 over the lunati because the factory exhaust ports and your edelbrock headers aren't the best flowing parts out there. So the extra duration and lift on the exhaust will help you out.

Just to make myself clear, I wouldn't consider a cam swap without learning to burn your own chips. Mail order tunes will always be someones best guess and with litterally hundreds of parameters that can be changed there is no way to come up with a chip from a list of mods. Think about it, GM built these ecm's to be able to compensate up to 20% and they were designing a tune for single combination of parts.

If you had a MAF setup you could get away with a lot more. Since a MAF setup measures the air flow directly it will compensate for a surprising amount of modifications. With a SD setup the air flow is calculated based on RPM and MAP pressure, so if the engine now moves more air at 2000 rpm and 50 map the ECM has now way of knowing. The plus side is you can tune the fuel curves with a greater degree of accuracy.

boldguy

I have heard a lot about the XFI268 from CompCams.
here are the specs
Intake Duration at 050 inch Lift:218Exhaust Duration at 050 inch Lift:224Duration at 050 inch Lift:218 int./224 exh.Advertised Intake Duration:268Advertised Exhaust Duration:276Advertised Duration:268 int./276 exh.Intake Valve Lift with Factory Rocker Arm Ratio:0.570 in.Exhaust Valve Lift with Factory Rocker Arm Ratio:0.565 in.Valve Lift with Factory Rocker Arm Ratio:0.570 int./0.565 exh. liftLobe Separation (degrees):113

1800-5800rpm

BMmonteSS

That is a popular cam and is about half a step bigger than the zz-9 cam. I hope you realize that the heads will have to come off for machine work or you'll have to play around with offset retainers as well as different springs in order to handle the lift of these cams. The stock heads are getting short on valve seal to retainer clearance at around .460 lift. I always check anything bigger than .450".

Have you given anymore thought to the chip burning deal? I really don't think you'll be happy with any of these cams without a proper tune.