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RPM range for the ZZ4 cam

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Old Jan 15, 2001 | 01:10 PM
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RPM range for the ZZ4 cam

Where does this cam make its power? I was going to go the hot cam route but then you get into crazy high rpms for TPI. Plus the ZZ4 price is much nicer.
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Old Jan 15, 2001 | 07:34 PM
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From: Orange, SoCal
Car: 1990 Pontiac Trans Am
Engine: 355 TPI siamesed runners
Transmission: Tremec T56
Axle/Gears: 12-Bolt 3.73
I shifted mine at 5000 RPMs, and according to the dyno, its power peak was 4800 RPMs. But that was on a stock ported intake. An aftermarket intake will be better. Mods are in my sig.

------------------
West Coast GM Shootout 2001!
1991 Camaro Z28
5.7L 5-Speed (originally 305)
13.25 @ 107.18 MPH
Southern California
Member: SoCal 3rd Gen F-Bodies
Webmaster: SoCal F-Bodies
-=ICON Motorsports=-
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Old Jan 15, 2001 | 08:47 PM
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Do you happen to know at what rpm the stock AO tranny shifts at with the 350 in front of it? If it makes a difference my car is a 91.
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Old Jan 16, 2001 | 01:48 AM
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From: Fort Collins, Colorado
You can manually shift the auto to shift at any RPM you want, I think just with it in "D" mine usually shifts at 5000 RPM.

------------------
1987 Chevy Camaro IROC-Z
L98 TPI 350 (5.7L)
TH 700R-4 Transmission with 2.77:1 Rear End

Current Mods: LT4 Hot Cam, Edelbrock TES 1 5/8" Headers, Hooker 3" Aerochamber Cat-Back System, Gutted Catalytic Converter, Performance Resource Chip, Accel Ignition Coil, Cap, Rotor, 8.8mm Wires, K&N Filters, JET TPI Air Foil, Fully Ported TPI Plenum and Base, All Free Mods, Falken ZIEX Z-Rated Tires.

Best ET (w/o LT4 cam): 14.32 @ 97.7mph
(corrected for elevation)
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Old Jan 16, 2001 | 05:58 AM
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From: Brevard Florida
A couple solutions for the shift point thing... A ratchet shifter works great if you want to row your own... Both Hurst and B&M sell these.
The other option is the one I prefer... B&M sells a governor spring recalibration kit. its installed with normal hand tools without dropping the pan. (I did mine while it was out of the car you might have to drop the crossmember and lower the tranny a bit to get to the governor) You fine tune your shift points by changing the governor weights and springs.


[This message has been edited by Dan W (edited January 16, 2001).]
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Old Jan 16, 2001 | 06:00 PM
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My 700 I put in my s10/305 shifts at 5500 if I leave it in first. Doesit all by itself without me going into second. Believe the factory governer does this. The trans is out of a 87 305 tpi.
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