Is the ZZ9 too much cam for mildly cleaned up aluminum L98 heads with Accel base/runners? I have bought a ZZ4 cam but haven't installed it yet. I'm thinking about stepping up to a little bigger cam if it will make the car faster. ------------------ 87 Formula 350 13.94@96.67 98 Z28 1LE 13.15@107.59 1LE Owners Association [This message has been edited by 98_1LE (edited March 31, 2001).]

That's a nice cam. You will have to upgrade your valve springs though.

Stock L98(most chevys) valve springs accept up to .490 lift so you will have to get some valve springs. Also, check out the GM Performance Parts LT4 Hot Cam because it is waaaayyyy cheaper than the T-piss ZZ-9 cam and is almost as "big".

The ZZ3/ZZ4 and ZZ9 cams are so similar it'd be a waste of $$ to go ZZ9. Both are excellent cams for a LTR TPI car. A few years ago one of the Vette mags ran a comparison test between these cams in the same dyno engine. HP/TQ was virtually identical to about 5000 RPM where the ZZ9 started to pull ahead (not by much though). Don't have that article but it'd be a good addition to the archives if someone has a copy.

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89 Formula 350, Accel Tri-Ys, 3" SLP, chip, Jacobs, SLP cold air, Probuilt tranny, Vigilante, 3.27s, Spohn torque arm & LCAs w/brackets, GW Subs

Thanks guys, I will just stick with the ZZ4 cam I already have.

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87 Formula 350 13.94@96.67
98 Z28 1LE 13.15@107.59
1LE Owners Association

If you want a little more lift out of the ZZ4 cam, you have the option to install 1.6 ratio roller rocker arms.

Just a suggestion.




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'87 L98 TPI IROCZ, AFR190 heads, 3.70 gears, ZZ9 cam, 2400 Art Carr TC, SLP 1 3/4" headers, SLP cat-back, no cat, no AC, no MAF screens, Accel manifold base & SuperRam, 24#/hr SVO injectors, Edelbrock double roller timing chain, MSD ext coil & distributor, trans cooler, 52mm TB with airfoil, TB coolant bypass, AFPR(58psi), K&N filters, Hotchkis lowering springs, my custom chip, Lay Ind. ram air kit, SS Brakes 1LE upgrade 12" rotors dual piston calipers, 265/45R16 Kumho V700 tires.
ET 13.39sec @ 107.21mph
'90 Eagle Talon AWD, no rust thru 9 winters
'99 Camaro SS, red, 6-spd, T-tops, Mcleod clutch, Pro 5.0 shifter, MAF processor, Direct Flow airlid, K&N filter, next mod: 4.10 rear gears
313.7Hp & 320.6ft-lbf, ET 13.55sec @ 105.1mph