ZZ4 Cam upgrade???
Thread Starter
Racer
Joined: Oct 2001
Posts: 306
Likes: 6
From: Round Rock TX
ZZ4 Cam upgrade???
Has anyone ever done a horsepower comparison when installing a ZZ4 cam in an L98? I am thinging about putting one in my 1990 Corvette and wanted to know what kind of gains to expect. I have an 8psi Procharger on it already, along with long tube headers, SuperRam intake, Borla exhaust, high flow cat, 30lb injectors, and a 58mm throttle body and the ZZ4 seems like a good grind for a Blower application. Will there be any valve to piston clearance problems? I know I will have to get the matching springs too. Will they fit with no modifications?
Thread Starter
Racer
Joined: Oct 2001
Posts: 306
Likes: 6
From: Round Rock TX
Re: ZZ4 Cam upgrade??? (CarNDrvr)
No one has a ZZ4 cam in an L98? The specs are as follows:
Duration @ .050 : 208/221
Lift w/ 1.5 rockers : .474/.510
Lobe Seperation : 112 degree
Does this sound like a good mild cam that will work with the computer, pass emissions, but still be a nice HP gain?
Duration @ .050 : 208/221
Lift w/ 1.5 rockers : .474/.510
Lobe Seperation : 112 degree
Does this sound like a good mild cam that will work with the computer, pass emissions, but still be a nice HP gain?
Safety Car
Joined: Mar 2000
Posts: 3,620
Likes: 2
From: Hillsboro OR
Re: ZZ4 Cam upgrade??? (CarNDrvr)
It should work well. Some guys want 114 LSA but 112 should be good since the intake duration is not that big. The 221 exhaust duration will be a big help since there is more exhaust to get out of the engine with a blower.
Burning Brakes
Joined: Feb 2002
Posts: 1,232
Likes: 10
From: Montrose Colorado
Re: ZZ4 Cam upgrade??? (AquaMetallic94LT1)
You might want to check out the TPIS ZZ-9 cam duration 282 intake 287 exhaust, duration at .050 212 intake 226 exhaust, gross lift .483 intake .520 exhaust, lobe seperation 112. Just a thought.
Racer
Joined: Apr 2002
Posts: 415
Likes: 0
From: loughborough Leics ENGLAND
Re: ZZ4 Cam upgrade??? (CarNDrvr)
I have fitted the zz4 cam to my 90 auto coupe. Piston to valve clearence was not a problem. I used lt4 springs retainers and clips. If you try to use std parts i think you will get retainer to guide contact. I had my guides cut down .080" to ensure clearance, but then bought the lt4 parts which give you more clearance. The springs are set at 1.750" hight and everything works well upto 5500 ( i have not reved it above this rpm ).
The low and mid range feels stronger but it still falls off after about 4500rpm with my LTR B/M base ASM runners and ported plenum.
My gut feeling is i wish i had gone bigger.:confused
I have not run it at the track yet but i hope to get low 13's :D
The low and mid range feels stronger but it still falls off after about 4500rpm with my LTR B/M base ASM runners and ported plenum.
My gut feeling is i wish i had gone bigger.:confused
I have not run it at the track yet but i hope to get low 13's :D
Racer
Joined: Apr 2002
Posts: 415
Likes: 0
From: loughborough Leics ENGLAND
Re: ZZ4 Cam upgrade??? (CarNDrvr)
I have fitted the zz4 cam to my 90 auto coupe. Piston to valve clearence was not a problem. I used lt4 springs retainers and clips. If you try to use std parts i think you will get retainer to guide contact. I had my guides cut down .080" to ensure clearance, but then bought the lt4 parts which give you more clearance. The springs are set at 1.750" hight and everything works well upto 5500 ( i have not reved it above this rpm ).
The low and mid range feels stronger but it still falls off after about 4500rpm with my LTR B/M base ASM runners and ported plenum.
My gut feeling is i wish i had gone bigger.
I have not run it at the track yet but i hope to get low 13's :D
The low and mid range feels stronger but it still falls off after about 4500rpm with my LTR B/M base ASM runners and ported plenum.
My gut feeling is i wish i had gone bigger.
I have not run it at the track yet but i hope to get low 13's :D
Thread Starter
Racer
Joined: Oct 2001
Posts: 306
Likes: 6
From: Round Rock TX
Re: ZZ4 Cam upgrade??? (BLUE ONE)
ZZ4 cam with matching springs - $175.00 = 20-25hp at the crank.
ZZ9 cam with matching springs - $500.00 = 35-40hp at the crank.
These HP figures came from TPIS...they were done on a naturally aspirated 350 TPI motor. They don't have any figures on a supercharged motor, but I would assume they be around the same.
The ZZ9's price is from TPIS...the ZZ4 is from a local shop that sells brand new ZZ4 cams pulled out of crate motors with matching springs. That same shop sells the complete HotCam kit...cam, springs and 1.6 roller rockers for $525.00.
Which would you buy???
[Modified by CarNDrvr, 4:47 PM 6/5/2002]
ZZ9 cam with matching springs - $500.00 = 35-40hp at the crank.
These HP figures came from TPIS...they were done on a naturally aspirated 350 TPI motor. They don't have any figures on a supercharged motor, but I would assume they be around the same.
The ZZ9's price is from TPIS...the ZZ4 is from a local shop that sells brand new ZZ4 cams pulled out of crate motors with matching springs. That same shop sells the complete HotCam kit...cam, springs and 1.6 roller rockers for $525.00.
Which would you buy???
[Modified by CarNDrvr, 4:47 PM 6/5/2002]
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Racer
Joined: Apr 2002
Posts: 415
Likes: 0
From: loughborough Leics ENGLAND
Re: ZZ4 Cam upgrade??? (CarNDrvr)
I think it depends on the RPM'S you are going to run to. I have bought many parts from TPIS with no complaints ( although they are not cheap ), but looking at TPIS's own comparason with the zz4 cam their is nothing in it until about 5250rpm...then the zz9 starts to gain that extra 20 or so horses.
With my LTR set up i went for the zz4 take off parts with no complaints, as it won't run above 5000rpm anyway so i would not see the benefit per dollar spent. ( Ran ok with std chip but i had custom one made as it ran slightly rich below 2000 rpm. )
If i was doing it again i would go the 219/s ram route espacally if i already had a super ram like you do.
The only proviso is i don't know how well it would work in a blown aplication.
The hot cam seems similar to the 219 (but cheaper) alot of people on third gen rave about it so try looking there. :cheers:
With my LTR set up i went for the zz4 take off parts with no complaints, as it won't run above 5000rpm anyway so i would not see the benefit per dollar spent. ( Ran ok with std chip but i had custom one made as it ran slightly rich below 2000 rpm. )
If i was doing it again i would go the 219/s ram route espacally if i already had a super ram like you do.
The only proviso is i don't know how well it would work in a blown aplication.
The hot cam seems similar to the 219 (but cheaper) alot of people on third gen rave about it so try looking there. :cheers:
Burning Brakes
Joined: Mar 1999
Posts: 858
Likes: 5
From: Fl,USA
Re: ZZ4 Cam upgrade??? (CarNDrvr)
I put the zz4 cam in my 89 and picked up 4 tenths in the 1/4 mi. If I were to do it over I would have went with the 219/219 accell / lingenfelter cam or something close to it.
Not because I was disappointed with the performance of the ZZ4 but I have since added a ported aftermarket base, ported heads and headers with 3" duals.
I feel the cam is too small for the mods that I now have(intake duration & lift). The 89 heads have a great exhaust to intake efficiency rating so I believe a straight pattern cam would have been better choice for my application. I feel it may be a better choice for your super charged set up.
Hope this helps!
John89
Not because I was disappointed with the performance of the ZZ4 but I have since added a ported aftermarket base, ported heads and headers with 3" duals.
I feel the cam is too small for the mods that I now have(intake duration & lift). The 89 heads have a great exhaust to intake efficiency rating so I believe a straight pattern cam would have been better choice for my application. I feel it may be a better choice for your super charged set up.
Hope this helps!
John89
